{"repo": "amitkumarankushcom-commits/roottolearn", "files": {"backend/routes/summaries.js": {"13e112381a2f952251f28fdf64f56f9cdc3d35f1": {"t": 1785745531.6163068, "n": 14139, "h": "cca3f0b7ebb888d7", "c": "// ============================================================\n//  routes/summaries.js - Learning Summaries Routes\n// ============================================================\n\nconst express = require('express');\nconst router = express.Router();\nconst jwt = require('jsonwebtoken');\nconst multer = require('multer');\nconst path = require('path');\nconst fs = require('fs');\nconst OpenAI = require('openai');\nconst Anthropic = require('@anthropic-ai/sdk');\nconst supabase = require('../config/supabase');\n\n// ── AI clients\nconst openaiClient = process.env.OPENAI_API_KEY\n  ? new OpenAI({ apiKey: process.env.OPENAI_API_KEY })\n  : null;\n\nconst deepseekClient = process.env.DEEPSEEK_API_KEY\n  ? new OpenAI({ apiKey: process.env.DEEPSEEK_API_KEY, baseURL: 'https://api.deepseek.com' })\n  : null;\n\nconst anthropicClient = process.env.ANTHROPIC_API_KEY && process.env.ANTHROPIC_API_KEY !== 'dummy'\n  ? new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY })\n  : null;\n\n// Groq client for free Whisper transcription (OpenAI-compatible API)\nconst groqClient = process.env.GROQ_API_KEY\n  ? new OpenAI({ apiKey: process.env.GROQ_API_KEY, baseURL: 'https://api.groq.com/openai/v1' })\n  : null;\n\nconst upload = multer({\n  dest: path.join(__dirname, '..', 'tmp'),\n  limits: { fileSize: 100 * 1024 * 1024 },\n  fileFilter: (req, file, cb) => {\n    const allowed = ['.mp3', '.wav', '.m4a', '.ogg', '.webm', '.mp4', '.mpeg', '.mpga'];\n    const ext = path.extname(file.originalname).toLowerCase();\n    if (allowed.includes(ext)) cb(null, true);\n    else cb(new Error('Unsupported audio format. Use MP3, WAV, M4A, or OGG.'));\n  }\n});\n\n// ── Middleware: Check JWT token\nconst authenticateToken = (req, res, next) => {\n  const authHeader = req.headers['authorization'];\n  const token = authHeader && authHeader.split(' ')[1];\n\n  if (!token) {\n    return res.status(401).json({ error: 'No token provided' });\n  }\n\n  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {\n    if (err) {\n      return res.status(403).json({ error: 'Invalid token' });\n    }\n    req.user = user;\n    next();\n  });\n};\n\nfunction buildSummaryFromText(text, style = 'simple', occupation = 'general') {\n  const cleaned = String(text || '').replace(/\\s+/g, ' ').trim();\n  if (!cleaned) return '';\n\n  const sentences = cleaned.split(/(?<=[.!?])\\s+/).filter(Boolean);\n  if (sentences.length === 0) return cleaned;\n\n  // Split into logical groups (intro, body, conclusion)\n  const total = sentences.length;\n  const introEnd = Math.max(1, Math.ceil(total * 0.2));\n  const bodyEnd = Math.max(introEnd + 1, Math.ceil(total * 0.75));\n\n  const intro = sentences.slice(0, introEnd);\n  const body = sentences.slice(introEnd, bodyEnd);\n  const conclusion = sentences.slice(bodyEnd);\n\n  const parts = [];\n\n  if (style === 'bullets') {\n    parts.push('## Overview');\n    intro.forEach(s => parts.push(`- ${s}`));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Key Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      conclusion.forEach(s => parts.push(`- ${s}`));\n    }\n  } else if (style === 'detailed') {\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Detailed Analysis');\n      // Group body sentences into paragraphs of 3\n      for (let i = 0; i < body.length; i += 3) {\n        parts.push(body.slice(i, i + 3).join(' '));\n      }\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Summary & Takeaways');\n      parts.push(conclusion.join(' '));\n    }\n  } else {\n    // simple\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Main Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      parts.push(conclusion.join(' '));\n    }\n  }\n\n  return parts.join('\\n');\n}\n\n// ── AI Summarization using selected model\nasync function aiSummarize(text, style, occupation, language, model) {\n  const styleGuide = {\n    simple: 'Write a clear, concise summary with sections: Overview, Main Points (as bullet list), Conclusion.',\n    detailed: 'Write a thorough detailed summary with sections: Overview, Detailed Analysis (multiple paragraphs), Summary & Takeaways.',\n    bullets: 'Write the entire summary as organized bullet points with sections: Overview, Key Points, Conclusion.'\n  };\n\n  const prompt = `You are an expert summarizer for ${occupation || 'general'} audience.\nSummarize the following text in ${language || 'English'}.\n${styleGuide[style] || styleGuide.simple}\nUse markdown formatting with ## headings.\nMark important terms with **bold**.\nAdd a > blockquote callout for the most critical takeaway.\nAt the end, add:\n---JSON---\n{\"highlights\":[{\"icon\":\"📌\",\"val\":\"<key point>\",\"label\":\"Highlight\"},{\"icon\":\"📊\",\"val\":\"<main fact>\",\"label\":\"Fact\"},{\"icon\":\"⚡\",\"val\":\"<action item>\",\"label\":\"Next Step\"}],\"takeaways\":[\"<takeaway 1>\",\"<takeaway 2>\",\"<takeaway 3>\"]}\n---END---\n\nText to summarize:\n${text.slice(0, 60000)}`;\n\n  // Try selected model, fall back to others if unavailable\n  const modelOrder = model === 'gpt'\n    ? ['gpt', 'deepseek', 'claude']\n    : model === 'deepseek'\n      ? ['deepseek', 'gpt', 'claude']\n      : ['claude', 'deepseek', 'gpt'];\n\n  for (const m of modelOrder) {\n    try {\n      if (m === 'claude' && anthropicClient) {\n        const resp = await anthropicClient.messages.create({\n          model: 'claude-sonnet-4-20250514',\n          max_tokens: 4096,\n          messages: [{ role: 'user', content: prompt }]\n        });\n        return resp.content[0].text;\n      }\n      if (m === 'gpt' && openaiClient) {\n        const resp = await openaiClient.chat.completions.create({\n          model: 'gpt-4o-mini',\n          max_tokens: 4096,\n          messages: [{ role: 'user', content: prompt }]\n        });\n        return resp.choices[0].message.content;\n      }\n      if (m === 'deepseek' && deepseekClient) {\n        const resp = await deepseekClient.chat.completions.create({\n          model: 'deepseek-chat',\n          max_tokens: 4096,\n          messages: [{ role: 'user', content: prompt }]\n        });\n        return resp.choices[0].message.content;\n      }\n    } catch (err) {\n      console.warn(`[AI SUMMARIZE] ${m} failed:`, err.message);\n      continue;\n    }\n  }\n\n  // All models failed — fall back to local text splitter\n  console.warn('[AI SUMMARIZE] All models failed, using local fallback');\n  return null;\n}\n\n// ── GET /api/summaries\nrouter.get('/', authenticateToken, async (req, res) => {\n  try {\n    const { data: summaries, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('user_id', req.user.id)\n      .order('created_at', { ascending: false });\n\n    if (error) throw error;\n\n    res.json({ success: true, summaries: summaries || [] });\n\n  } catch (error) {\n    console.error('[GET SUMMARIES ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── GET /api/summaries/:id\nrouter.get('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (error || !summary) {\n      return res.status(404).json({ error: 'Summary not found' });\n    }\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[GET SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries\nrouter.post('/', authenticateToken, async (req, res) => {\n  try {\n    // ── Enforce free plan limit (3 summaries per month)\n    const userPlan = req.user.plan || 'free';\n    if (userPlan === 'free') {\n      const startOfMonth = new Date();\n      startOfMonth.setDate(1);\n      startOfMonth.setHours(0, 0, 0, 0);\n\n      const { count, error: countErr } = await supabase\n        .from('summaries')\n        .select('id', { count: 'exact', head: true })\n        .eq('user_id', req.user.id)\n        .gte('created_at', startOfMonth.toISOString());\n\n      if (!countErr && count >= 3) {\n        return res.status(403).json({ error: 'Free plan limit reached (3 summaries/month). Upgrade to Pro for unlimited access.', upgradeRequired: true });\n      }\n    }\n\n    const { title, text, language, occupation, style, model } = req.body;\n\n    const fileName = title || `Summary ${new Date().toLocaleString()}`;\n\n    if (!text || !text.trim()) {\n      return res.status(400).json({ error: 'Text content is required' });\n    }\n\n    // Try AI summarization first, fall back to local text splitter\n    let summaryText = await aiSummarize(text, style, occupation, language, model || 'claude');\n    if (!summaryText) {\n      summaryText = buildSummaryFromText(text, style, occupation);\n    }\n\n    if (!summaryText) {\n      return res.status(400).json({ error: 'Could not generate summary' });\n    }\n\n    const wordCount = summaryText.trim().split(/\\s+/).length;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .insert([{\n        user_id: req.user.id,\n        file_name: fileName,\n        file_type: 'text',\n        file_size_kb: Math.round(new Blob([text || '']).size / 1024) || 0,\n        language: language || 'english-simple',\n        occupation: occupation || 'general',\n        style: style || 'simple',\n        word_count: wordCount,\n        summary_text: summaryText,\n        created_at: new Date().toISOString()\n      }])\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.status(201).json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[CREATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── PUT /api/summaries/:id\nrouter.put('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n    const { file_name, summary_text } = req.body;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const updates = {};\n    if (file_name) updates.file_name = file_name;\n    if (summary_text) updates.summary_text = summary_text;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .update(updates)\n      .eq('id', id)\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[UPDATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── DELETE /api/summaries/:id\nrouter.delete('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { error } = await supabase\n      .from('summaries')\n      .delete()\n      .eq('id', id);\n\n    if (error) throw error;\n\n    res.json({ success: true, message: 'Summary deleted' });\n\n  } catch (error) {\n    console.error('[DELETE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries/transcribe (Audio → Text via Whisper)\nrouter.post('/transcribe', authenticateToken, upload.single('audio'), async (req, res) => {\n  if (!req.file) {\n    return res.status(400).json({ error: 'No audio file uploaded' });\n  }\n\n  const filePath = req.file.path;\n\n  try {\n    if (!openaiClient && !groqClient) {\n      return res.status(503).json({ error: 'Audio transcription is not configured. Set OPENAI_API_KEY or GROQ_API_KEY in environment.' });\n    }\n\n    // Rename temp file to include original extension (Whisper needs it)\n    const ext = path.extname(req.file.originalname).toLowerCase() || '.mp3';\n    const namedPath = filePath + ext;\n    fs.renameSync(filePath, namedPath);\n\n    // Try transcription providers in order: Groq (free) → OpenAI\n    let text = '';\n    let lastError = null;\n\n    const providers = [\n      { name: 'Groq', client: groqClient, model: 'whisper-large-v3-turbo' },\n      { name: 'OpenAI', client: openaiClient, model: 'whisper-1' },\n    ];\n\n    for (const provider of providers) {\n      if (!provider.client) continue;\n      try {\n        console.log(`[TRANSCRIBE] Trying ${provider.name} Whisper...`);\n        const transcription = await provider.client.audio.transcriptions.create({\n          file: fs.createReadStream(namedPath),\n          model: provider.model,\n          response_format: 'text',\n        });\n        text = typeof transcription === 'string' ? transcription : transcription.text || '';\n        if (text.trim()) {\n          console.log(`[TRANSCRIBE] ${provider.name} succeeded (${text.length} chars)`);\n          break;\n        }\n      } catch (err) {\n        console.warn(`[TRANSCRIBE] ${provider.name} failed:`, err.message);\n        lastError = err;\n      }\n    }\n\n    // Clean up temp file\n    fs.unlink(namedPath, () => {});\n\n    if (!text.trim()) {\n      if (lastError && lastError.status === 401) {\n        return res.status(503).json({ error: 'API key invalid. Set a valid GROQ_API_KEY (free at console.groq.com) or OPENAI_API_KEY.' });\n      }\n      return res.status(422).json({ error: 'Could not transcribe audio. The file may be empty or inaudible.' });\n    }\n\n    res.json({ success: true, text });\n\n  } catch (error) {\n    // Clean up temp file on error\n    try { fs.unlinkSync(filePath); } catch {}\n    try { fs.unlinkSync(filePath + path.extname(req.file.originalname)); } catch {}\n\n    console.error('[TRANSCRIBE ERROR]', error);\n    res.status(500).json({ error: 'Transcription failed: ' + (error.message || 'Unknown error') });\n  }\n});\n\nmodule.exports = router;\n"}, "9f5e6accf8c9c059af39824457a498f45897c860": {"t": 1785753925.9182675, "n": 13202, "h": "d3d4ee5dc49d993a", "c": "// ============================================================\n//  routes/summaries.js - Learning Summaries Routes\n// ============================================================\n\nconst express = require('express');\nconst router = express.Router();\nconst jwt = require('jsonwebtoken');\nconst multer = require('multer');\nconst path = require('path');\nconst fs = require('fs');\nconst OpenAI = require('openai');\nconst Anthropic = require('@anthropic-ai/sdk');\nconst supabase = require('../config/supabase');\n\n// ── AI clients\nconst openaiClient = process.env.OPENAI_API_KEY\n  ? new OpenAI({ apiKey: process.env.OPENAI_API_KEY })\n  : null;\n\nconst deepseekClient = process.env.DEEPSEEK_API_KEY\n  ? new OpenAI({ apiKey: process.env.DEEPSEEK_API_KEY, baseURL: 'https://api.deepseek.com' })\n  : null;\n\nconst anthropicClient = process.env.ANTHROPIC_API_KEY && process.env.ANTHROPIC_API_KEY !== 'dummy'\n  ? new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY })\n  : null;\nconst upload = multer({\n  dest: path.join(__dirname, '..', 'tmp'),\n  limits: { fileSize: 100 * 1024 * 1024 },\n  fileFilter: (req, file, cb) => {\n    const allowed = ['.mp3', '.wav', '.m4a', '.ogg', '.webm', '.mp4', '.mpeg', '.mpga'];\n    const ext = path.extname(file.originalname).toLowerCase();\n    if (allowed.includes(ext)) cb(null, true);\n    else cb(new Error('Unsupported audio format. Use MP3, WAV, M4A, or OGG.'));\n  }\n});\n\n// ── Middleware: Check JWT token\nconst authenticateToken = (req, res, next) => {\n  const authHeader = req.headers['authorization'];\n  const token = authHeader && authHeader.split(' ')[1];\n\n  if (!token) {\n    return res.status(401).json({ error: 'No token provided' });\n  }\n\n  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {\n    if (err) {\n      return res.status(403).json({ error: 'Invalid token' });\n    }\n    req.user = user;\n    next();\n  });\n};\n\nfunction buildSummaryFromText(text, style = 'simple', occupation = 'general') {\n  const cleaned = String(text || '').replace(/\\s+/g, ' ').trim();\n  if (!cleaned) return '';\n\n  const sentences = cleaned.split(/(?<=[.!?])\\s+/).filter(Boolean);\n  if (sentences.length === 0) return cleaned;\n\n  // Split into logical groups (intro, body, conclusion)\n  const total = sentences.length;\n  const introEnd = Math.max(1, Math.ceil(total * 0.2));\n  const bodyEnd = Math.max(introEnd + 1, Math.ceil(total * 0.75));\n\n  const intro = sentences.slice(0, introEnd);\n  const body = sentences.slice(introEnd, bodyEnd);\n  const conclusion = sentences.slice(bodyEnd);\n\n  const parts = [];\n\n  if (style === 'bullets') {\n    parts.push('## Overview');\n    intro.forEach(s => parts.push(`- ${s}`));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Key Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      conclusion.forEach(s => parts.push(`- ${s}`));\n    }\n  } else if (style === 'detailed') {\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Detailed Analysis');\n      // Group body sentences into paragraphs of 3\n      for (let i = 0; i < body.length; i += 3) {\n        parts.push(body.slice(i, i + 3).join(' '));\n      }\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Summary & Takeaways');\n      parts.push(conclusion.join(' '));\n    }\n  } else {\n    // simple\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Main Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      parts.push(conclusion.join(' '));\n    }\n  }\n\n  return parts.join('\\n');\n}\n\n// ── AI Summarization using selected model\nasync function aiSummarize(text, style, occupation, language, model) {\n  const styleGuide = {\n    simple: 'Write a clear, concise summary with sections: Overview, Main Points (as bullet list), Conclusion.',\n    detailed: 'Write a thorough detailed summary with sections: Overview, Detailed Analysis (multiple paragraphs), Summary & Takeaways.',\n    bullets: 'Write the entire summary as organized bullet points with sections: Overview, Key Points, Conclusion.'\n  };\n\n  const prompt = `You are an expert summarizer for ${occupation || 'general'} audience.\nSummarize the following text in ${language || 'English'}.\n${styleGuide[style] || styleGuide.simple}\nUse markdown formatting with ## headings.\nMark important terms with **bold**.\nAdd a > blockquote callout for the most critical takeaway.\nAt the end, add:\n---JSON---\n{\"highlights\":[{\"icon\":\"📌\",\"val\":\"<key point>\",\"label\":\"Highlight\"},{\"icon\":\"📊\",\"val\":\"<main fact>\",\"label\":\"Fact\"},{\"icon\":\"⚡\",\"val\":\"<action item>\",\"label\":\"Next Step\"}],\"takeaways\":[\"<takeaway 1>\",\"<takeaway 2>\",\"<takeaway 3>\"]}\n---END---\n\nText to summarize:\n${text.slice(0, 60000)}`;\n\n  // Try selected model, fall back to others if unavailable\n  const modelOrder = model === 'gpt'\n    ? ['gpt', 'deepseek', 'claude']\n    : model === 'deepseek'\n      ? ['deepseek', 'gpt', 'claude']\n      : ['claude', 'deepseek', 'gpt'];\n\n  for (const m of modelOrder) {\n    try {\n      if (m === 'claude' && anthropicClient) {\n        const resp = await anthropicClient.messages.create({\n          model: 'claude-sonnet-4-20250514',\n          max_tokens: 4096,\n          messages: [{ role: 'user', content: prompt }]\n        });\n        return resp.content[0].text;\n      }\n      if (m === 'gpt' && openaiClient) {\n        const resp = await openaiClient.chat.completions.create({\n          model: 'gpt-4o-mini',\n          max_tokens: 4096,\n          messages: [{ role: 'user', content: prompt }]\n        });\n        return resp.choices[0].message.content;\n      }\n      if (m === 'deepseek' && deepseekClient) {\n        const resp = await deepseekClient.chat.completions.create({\n          model: 'deepseek-chat',\n          max_tokens: 4096,\n          messages: [{ role: 'user', content: prompt }]\n        });\n        return resp.choices[0].message.content;\n      }\n    } catch (err) {\n      console.warn(`[AI SUMMARIZE] ${m} failed:`, err.message);\n      continue;\n    }\n  }\n\n  // All models failed — fall back to local text splitter\n  console.warn('[AI SUMMARIZE] All models failed, using local fallback');\n  return null;\n}\n\n// ── GET /api/summaries\nrouter.get('/', authenticateToken, async (req, res) => {\n  try {\n    const { data: summaries, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('user_id', req.user.id)\n      .order('created_at', { ascending: false });\n\n    if (error) throw error;\n\n    res.json({ success: true, summaries: summaries || [] });\n\n  } catch (error) {\n    console.error('[GET SUMMARIES ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── GET /api/summaries/:id\nrouter.get('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (error || !summary) {\n      return res.status(404).json({ error: 'Summary not found' });\n    }\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[GET SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries\nrouter.post('/', authenticateToken, async (req, res) => {\n  try {\n    // ── Enforce free plan limit (3 summaries per month)\n    const userPlan = req.user.plan || 'free';\n    if (userPlan === 'free') {\n      const startOfMonth = new Date();\n      startOfMonth.setDate(1);\n      startOfMonth.setHours(0, 0, 0, 0);\n\n      const { count, error: countErr } = await supabase\n        .from('summaries')\n        .select('id', { count: 'exact', head: true })\n        .eq('user_id', req.user.id)\n        .gte('created_at', startOfMonth.toISOString());\n\n      if (!countErr && count >= 3) {\n        return res.status(403).json({ error: 'Free plan limit reached (3 summaries/month). Upgrade to Pro for unlimited access.', upgradeRequired: true });\n      }\n    }\n\n    const { title, text, language, occupation, style, model } = req.body;\n\n    const fileName = title || `Summary ${new Date().toLocaleString()}`;\n\n    if (!text || !text.trim()) {\n      return res.status(400).json({ error: 'Text content is required' });\n    }\n\n    // Try AI summarization first, fall back to local text splitter\n    let summaryText = await aiSummarize(text, style, occupation, language, model || 'claude');\n    if (!summaryText) {\n      summaryText = buildSummaryFromText(text, style, occupation);\n    }\n\n    if (!summaryText) {\n      return res.status(400).json({ error: 'Could not generate summary' });\n    }\n\n    const wordCount = summaryText.trim().split(/\\s+/).length;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .insert([{\n        user_id: req.user.id,\n        file_name: fileName,\n        file_type: 'text',\n        file_size_kb: Math.round(new Blob([text || '']).size / 1024) || 0,\n        language: language || 'english-simple',\n        occupation: occupation || 'general',\n        style: style || 'simple',\n        word_count: wordCount,\n        summary_text: summaryText,\n        created_at: new Date().toISOString()\n      }])\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.status(201).json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[CREATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── PUT /api/summaries/:id\nrouter.put('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n    const { file_name, summary_text } = req.body;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const updates = {};\n    if (file_name) updates.file_name = file_name;\n    if (summary_text) updates.summary_text = summary_text;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .update(updates)\n      .eq('id', id)\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[UPDATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── DELETE /api/summaries/:id\nrouter.delete('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { error } = await supabase\n      .from('summaries')\n      .delete()\n      .eq('id', id);\n\n    if (error) throw error;\n\n    res.json({ success: true, message: 'Summary deleted' });\n\n  } catch (error) {\n    console.error('[DELETE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries/transcribe (Audio → Text via Whisper)\nrouter.post('/transcribe', authenticateToken, upload.single('audio'), async (req, res) => {\n  if (!req.file) {\n    return res.status(400).json({ error: 'No audio file uploaded' });\n  }\n\n  const filePath = req.file.path;\n\n  try {\n    if (!openaiClient) {\n      return res.status(503).json({ error: 'Audio transcription is not configured. Set OPENAI_API_KEY in environment.' });\n    }\n\n    // Rename temp file to include original extension (Whisper needs it)\n    const ext = path.extname(req.file.originalname).toLowerCase() || '.mp3';\n    const namedPath = filePath + ext;\n    fs.renameSync(filePath, namedPath);\n\n    const transcription = await openaiClient.audio.transcriptions.create({\n      file: fs.createReadStream(namedPath),\n      model: 'whisper-1',\n      response_format: 'text',\n    });\n\n    // Clean up temp file\n    fs.unlink(namedPath, () => {});\n\n    const text = typeof transcription === 'string' ? transcription : transcription.text || '';\n    if (!text.trim()) {\n      return res.status(422).json({ error: 'Could not transcribe audio. The file may be empty or inaudible.' });\n    }\n\n    res.json({ success: true, text });\n\n  } catch (error) {\n    // Clean up temp file on error\n    try { fs.unlinkSync(filePath); } catch {}\n    try { fs.unlinkSync(filePath + path.extname(req.file.originalname)); } catch {}\n\n    console.error('[TRANSCRIBE ERROR]', error);\n\n    if (error.status === 401) {\n      return res.status(503).json({ error: 'Audio/video transcription requires a valid OpenAI API key (Whisper). This is separate from the AI model selection. Please set a valid OPENAI_API_KEY or use a PDF/text file instead.' });\n    }\n    res.status(500).json({ error: 'Transcription failed: ' + (error.message || 'Unknown error') });\n  }\n});\n\nmodule.exports = router;\n"}, "584f90d7450c37ba365ba9da8073a2c60ecf2943": {"t": 1785753927.3575766, "n": 13067, "h": "75cc4aaa71c7d39f", "c": "// ============================================================\n//  routes/summaries.js - Learning Summaries Routes\n// ============================================================\n\nconst express = require('express');\nconst router = express.Router();\nconst jwt = require('jsonwebtoken');\nconst multer = require('multer');\nconst path = require('path');\nconst fs = require('fs');\nconst OpenAI = require('openai');\nconst Anthropic = require('@anthropic-ai/sdk');\nconst supabase = require('../config/supabase');\n\n// ── AI clients\nconst openaiClient = process.env.OPENAI_API_KEY\n  ? new OpenAI({ apiKey: process.env.OPENAI_API_KEY })\n  : null;\n\nconst deepseekClient = process.env.DEEPSEEK_API_KEY\n  ? new OpenAI({ apiKey: process.env.DEEPSEEK_API_KEY, baseURL: 'https://api.deepseek.com' })\n  : null;\n\nconst anthropicClient = process.env.ANTHROPIC_API_KEY && process.env.ANTHROPIC_API_KEY !== 'dummy'\n  ? new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY })\n  : null;\nconst upload = multer({\n  dest: path.join(__dirname, '..', 'tmp'),\n  limits: { fileSize: 100 * 1024 * 1024 },\n  fileFilter: (req, file, cb) => {\n    const allowed = ['.mp3', '.wav', '.m4a', '.ogg', '.webm', '.mp4', '.mpeg', '.mpga'];\n    const ext = path.extname(file.originalname).toLowerCase();\n    if (allowed.includes(ext)) cb(null, true);\n    else cb(new Error('Unsupported audio format. Use MP3, WAV, M4A, or OGG.'));\n  }\n});\n\n// ── Middleware: Check JWT token\nconst authenticateToken = (req, res, next) => {\n  const authHeader = req.headers['authorization'];\n  const token = authHeader && authHeader.split(' ')[1];\n\n  if (!token) {\n    return res.status(401).json({ error: 'No token provided' });\n  }\n\n  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {\n    if (err) {\n      return res.status(403).json({ error: 'Invalid token' });\n    }\n    req.user = user;\n    next();\n  });\n};\n\nfunction buildSummaryFromText(text, style = 'simple', occupation = 'general') {\n  const cleaned = String(text || '').replace(/\\s+/g, ' ').trim();\n  if (!cleaned) return '';\n\n  const sentences = cleaned.split(/(?<=[.!?])\\s+/).filter(Boolean);\n  if (sentences.length === 0) return cleaned;\n\n  // Split into logical groups (intro, body, conclusion)\n  const total = sentences.length;\n  const introEnd = Math.max(1, Math.ceil(total * 0.2));\n  const bodyEnd = Math.max(introEnd + 1, Math.ceil(total * 0.75));\n\n  const intro = sentences.slice(0, introEnd);\n  const body = sentences.slice(introEnd, bodyEnd);\n  const conclusion = sentences.slice(bodyEnd);\n\n  const parts = [];\n\n  if (style === 'bullets') {\n    parts.push('## Overview');\n    intro.forEach(s => parts.push(`- ${s}`));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Key Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      conclusion.forEach(s => parts.push(`- ${s}`));\n    }\n  } else if (style === 'detailed') {\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Detailed Analysis');\n      // Group body sentences into paragraphs of 3\n      for (let i = 0; i < body.length; i += 3) {\n        parts.push(body.slice(i, i + 3).join(' '));\n      }\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Summary & Takeaways');\n      parts.push(conclusion.join(' '));\n    }\n  } else {\n    // simple\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Main Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      parts.push(conclusion.join(' '));\n    }\n  }\n\n  return parts.join('\\n');\n}\n\n// ── AI Summarization using selected model\nasync function aiSummarize(text, style, occupation, language, model) {\n  const styleGuide = {\n    simple: 'Write a clear, concise summary with sections: Overview, Main Points (as bullet list), Conclusion.',\n    detailed: 'Write a thorough detailed summary with sections: Overview, Detailed Analysis (multiple paragraphs), Summary & Takeaways.',\n    bullets: 'Write the entire summary as organized bullet points with sections: Overview, Key Points, Conclusion.'\n  };\n\n  const prompt = `You are an expert summarizer for ${occupation || 'general'} audience.\nSummarize the following text in ${language || 'English'}.\n${styleGuide[style] || styleGuide.simple}\nUse markdown formatting with ## headings.\nMark important terms with **bold**.\nAdd a > blockquote callout for the most critical takeaway.\nAt the end, add:\n---JSON---\n{\"highlights\":[{\"icon\":\"📌\",\"val\":\"<key point>\",\"label\":\"Highlight\"},{\"icon\":\"📊\",\"val\":\"<main fact>\",\"label\":\"Fact\"},{\"icon\":\"⚡\",\"val\":\"<action item>\",\"label\":\"Next Step\"}],\"takeaways\":[\"<takeaway 1>\",\"<takeaway 2>\",\"<takeaway 3>\"]}\n---END---\n\nText to summarize:\n${text.slice(0, 60000)}`;\n\n  // Try selected model, fall back to others if unavailable\n  const modelOrder = model === 'gpt'\n    ? ['gpt', 'deepseek', 'claude']\n    : model === 'deepseek'\n      ? ['deepseek', 'gpt', 'claude']\n      : ['claude', 'deepseek', 'gpt'];\n\n  for (const m of modelOrder) {\n    try {\n      if (m === 'claude' && anthropicClient) {\n        const resp = await anthropicClient.messages.create({\n          model: 'claude-sonnet-4-20250514',\n          max_tokens: 4096,\n          messages: [{ role: 'user', content: prompt }]\n        });\n        return resp.content[0].text;\n      }\n      if (m === 'gpt' && openaiClient) {\n        const resp = await openaiClient.chat.completions.create({\n          model: 'gpt-4o-mini',\n          max_tokens: 4096,\n          messages: [{ role: 'user', content: prompt }]\n        });\n        return resp.choices[0].message.content;\n      }\n      if (m === 'deepseek' && deepseekClient) {\n        const resp = await deepseekClient.chat.completions.create({\n          model: 'deepseek-chat',\n          max_tokens: 4096,\n          messages: [{ role: 'user', content: prompt }]\n        });\n        return resp.choices[0].message.content;\n      }\n    } catch (err) {\n      console.warn(`[AI SUMMARIZE] ${m} failed:`, err.message);\n      continue;\n    }\n  }\n\n  // All models failed — fall back to local text splitter\n  console.warn('[AI SUMMARIZE] All models failed, using local fallback');\n  return null;\n}\n\n// ── GET /api/summaries\nrouter.get('/', authenticateToken, async (req, res) => {\n  try {\n    const { data: summaries, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('user_id', req.user.id)\n      .order('created_at', { ascending: false });\n\n    if (error) throw error;\n\n    res.json({ success: true, summaries: summaries || [] });\n\n  } catch (error) {\n    console.error('[GET SUMMARIES ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── GET /api/summaries/:id\nrouter.get('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (error || !summary) {\n      return res.status(404).json({ error: 'Summary not found' });\n    }\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[GET SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries\nrouter.post('/', authenticateToken, async (req, res) => {\n  try {\n    // ── Enforce free plan limit (3 summaries per month)\n    const userPlan = req.user.plan || 'free';\n    if (userPlan === 'free') {\n      const startOfMonth = new Date();\n      startOfMonth.setDate(1);\n      startOfMonth.setHours(0, 0, 0, 0);\n\n      const { count, error: countErr } = await supabase\n        .from('summaries')\n        .select('id', { count: 'exact', head: true })\n        .eq('user_id', req.user.id)\n        .gte('created_at', startOfMonth.toISOString());\n\n      if (!countErr && count >= 3) {\n        return res.status(403).json({ error: 'Free plan limit reached (3 summaries/month). Upgrade to Pro for unlimited access.', upgradeRequired: true });\n      }\n    }\n\n    const { title, text, language, occupation, style, model } = req.body;\n\n    const fileName = title || `Summary ${new Date().toLocaleString()}`;\n\n    if (!text || !text.trim()) {\n      return res.status(400).json({ error: 'Text content is required' });\n    }\n\n    // Try AI summarization first, fall back to local text splitter\n    let summaryText = await aiSummarize(text, style, occupation, language, model || 'claude');\n    if (!summaryText) {\n      summaryText = buildSummaryFromText(text, style, occupation);\n    }\n\n    if (!summaryText) {\n      return res.status(400).json({ error: 'Could not generate summary' });\n    }\n\n    const wordCount = summaryText.trim().split(/\\s+/).length;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .insert([{\n        user_id: req.user.id,\n        file_name: fileName,\n        file_type: 'text',\n        file_size_kb: Math.round(new Blob([text || '']).size / 1024) || 0,\n        language: language || 'english-simple',\n        occupation: occupation || 'general',\n        style: style || 'simple',\n        word_count: wordCount,\n        summary_text: summaryText,\n        created_at: new Date().toISOString()\n      }])\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.status(201).json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[CREATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── PUT /api/summaries/:id\nrouter.put('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n    const { file_name, summary_text } = req.body;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const updates = {};\n    if (file_name) updates.file_name = file_name;\n    if (summary_text) updates.summary_text = summary_text;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .update(updates)\n      .eq('id', id)\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[UPDATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── DELETE /api/summaries/:id\nrouter.delete('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { error } = await supabase\n      .from('summaries')\n      .delete()\n      .eq('id', id);\n\n    if (error) throw error;\n\n    res.json({ success: true, message: 'Summary deleted' });\n\n  } catch (error) {\n    console.error('[DELETE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries/transcribe (Audio → Text via Whisper)\nrouter.post('/transcribe', authenticateToken, upload.single('audio'), async (req, res) => {\n  if (!req.file) {\n    return res.status(400).json({ error: 'No audio file uploaded' });\n  }\n\n  const filePath = req.file.path;\n\n  try {\n    if (!openaiClient) {\n      return res.status(503).json({ error: 'Audio transcription is not configured. Set OPENAI_API_KEY in environment.' });\n    }\n\n    // Rename temp file to include original extension (Whisper needs it)\n    const ext = path.extname(req.file.originalname).toLowerCase() || '.mp3';\n    const namedPath = filePath + ext;\n    fs.renameSync(filePath, namedPath);\n\n    const transcription = await openaiClient.audio.transcriptions.create({\n      file: fs.createReadStream(namedPath),\n      model: 'whisper-1',\n      response_format: 'text',\n    });\n\n    // Clean up temp file\n    fs.unlink(namedPath, () => {});\n\n    const text = typeof transcription === 'string' ? transcription : transcription.text || '';\n    if (!text.trim()) {\n      return res.status(422).json({ error: 'Could not transcribe audio. The file may be empty or inaudible.' });\n    }\n\n    res.json({ success: true, text });\n\n  } catch (error) {\n    // Clean up temp file on error\n    try { fs.unlinkSync(filePath); } catch {}\n    try { fs.unlinkSync(filePath + path.extname(req.file.originalname)); } catch {}\n\n    console.error('[TRANSCRIBE ERROR]', error);\n\n    if (error.status === 401) {\n      return res.status(503).json({ error: 'Invalid OpenAI API key. Check OPENAI_API_KEY.' });\n    }\n    res.status(500).json({ error: 'Transcription failed: ' + (error.message || 'Unknown error') });\n  }\n});\n\nmodule.exports = router;\n"}, "bfcc921234a65ceb7496fc315f1ef7f38c5d3375": {"t": 1785753928.7699668, "n": 9882, "h": "fe4993372c383f90", "c": "// ============================================================\n//  routes/summaries.js - Learning Summaries Routes\n// ============================================================\n\nconst express = require('express');\nconst router = express.Router();\nconst jwt = require('jsonwebtoken');\nconst multer = require('multer');\nconst path = require('path');\nconst fs = require('fs');\nconst OpenAI = require('openai');\nconst supabase = require('../config/supabase');\n\n// ── Multer config for audio uploads (store in /tmp, max 25MB)\nconst upload = multer({\n  dest: path.join(__dirname, '..', 'tmp'),\n  limits: { fileSize: 100 * 1024 * 1024 },\n  fileFilter: (req, file, cb) => {\n    const allowed = ['.mp3', '.wav', '.m4a', '.ogg', '.webm', '.mp4', '.mpeg', '.mpga'];\n    const ext = path.extname(file.originalname).toLowerCase();\n    if (allowed.includes(ext)) cb(null, true);\n    else cb(new Error('Unsupported audio format. Use MP3, WAV, M4A, or OGG.'));\n  }\n});\n\n// ── OpenAI client (for Whisper transcription)\nconst openai = process.env.OPENAI_API_KEY\n  ? new OpenAI({ apiKey: process.env.OPENAI_API_KEY })\n  : null;\n\n// ── Middleware: Check JWT token\nconst authenticateToken = (req, res, next) => {\n  const authHeader = req.headers['authorization'];\n  const token = authHeader && authHeader.split(' ')[1];\n\n  if (!token) {\n    return res.status(401).json({ error: 'No token provided' });\n  }\n\n  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {\n    if (err) {\n      return res.status(403).json({ error: 'Invalid token' });\n    }\n    req.user = user;\n    next();\n  });\n};\n\nfunction buildSummaryFromText(text, style = 'simple', occupation = 'general') {\n  const cleaned = String(text || '').replace(/\\s+/g, ' ').trim();\n  if (!cleaned) return '';\n\n  const sentences = cleaned.split(/(?<=[.!?])\\s+/).filter(Boolean);\n  if (sentences.length === 0) return cleaned;\n\n  // Split into logical groups (intro, body, conclusion)\n  const total = sentences.length;\n  const introEnd = Math.max(1, Math.ceil(total * 0.2));\n  const bodyEnd = Math.max(introEnd + 1, Math.ceil(total * 0.75));\n\n  const intro = sentences.slice(0, introEnd);\n  const body = sentences.slice(introEnd, bodyEnd);\n  const conclusion = sentences.slice(bodyEnd);\n\n  const parts = [];\n\n  if (style === 'bullets') {\n    parts.push('## Overview');\n    intro.forEach(s => parts.push(`- ${s}`));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Key Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      conclusion.forEach(s => parts.push(`- ${s}`));\n    }\n  } else if (style === 'detailed') {\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Detailed Analysis');\n      // Group body sentences into paragraphs of 3\n      for (let i = 0; i < body.length; i += 3) {\n        parts.push(body.slice(i, i + 3).join(' '));\n      }\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Summary & Takeaways');\n      parts.push(conclusion.join(' '));\n    }\n  } else {\n    // simple\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Main Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      parts.push(conclusion.join(' '));\n    }\n  }\n\n  return parts.join('\\n');\n}\n\n// ── GET /api/summaries\nrouter.get('/', authenticateToken, async (req, res) => {\n  try {\n    const { data: summaries, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('user_id', req.user.id)\n      .order('created_at', { ascending: false });\n\n    if (error) throw error;\n\n    res.json({ success: true, summaries: summaries || [] });\n\n  } catch (error) {\n    console.error('[GET SUMMARIES ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── GET /api/summaries/:id\nrouter.get('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (error || !summary) {\n      return res.status(404).json({ error: 'Summary not found' });\n    }\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[GET SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries\nrouter.post('/', authenticateToken, async (req, res) => {\n  try {\n    // ── Enforce free plan limit (3 summaries per month)\n    const userPlan = req.user.plan || 'free';\n    if (userPlan === 'free') {\n      const startOfMonth = new Date();\n      startOfMonth.setDate(1);\n      startOfMonth.setHours(0, 0, 0, 0);\n\n      const { count, error: countErr } = await supabase\n        .from('summaries')\n        .select('id', { count: 'exact', head: true })\n        .eq('user_id', req.user.id)\n        .gte('created_at', startOfMonth.toISOString());\n\n      if (!countErr && count >= 3) {\n        return res.status(403).json({ error: 'Free plan limit reached (3 summaries/month). Upgrade to Pro for unlimited access.', upgradeRequired: true });\n      }\n    }\n\n    const { title, text, language, occupation, style, model } = req.body;\n\n    const fileName = title || `Summary ${new Date().toLocaleString()}`;\n    const summaryText = buildSummaryFromText(text, style, occupation);\n\n    if (!summaryText) {\n      return res.status(400).json({ error: 'Text content is required' });\n    }\n\n    const wordCount = summaryText.trim().split(/\\s+/).length;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .insert([{\n        user_id: req.user.id,\n        file_name: fileName,\n        file_type: 'text',\n        file_size_kb: Math.round(new Blob([text || '']).size / 1024) || 0,\n        language: language || 'english-simple',\n        occupation: occupation || 'general',\n        style: style || 'simple',\n        word_count: wordCount,\n        summary_text: summaryText,\n        created_at: new Date().toISOString()\n      }])\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.status(201).json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[CREATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── PUT /api/summaries/:id\nrouter.put('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n    const { file_name, summary_text } = req.body;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const updates = {};\n    if (file_name) updates.file_name = file_name;\n    if (summary_text) updates.summary_text = summary_text;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .update(updates)\n      .eq('id', id)\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[UPDATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── DELETE /api/summaries/:id\nrouter.delete('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { error } = await supabase\n      .from('summaries')\n      .delete()\n      .eq('id', id);\n\n    if (error) throw error;\n\n    res.json({ success: true, message: 'Summary deleted' });\n\n  } catch (error) {\n    console.error('[DELETE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries/transcribe (Audio → Text via Whisper)\nrouter.post('/transcribe', authenticateToken, upload.single('audio'), async (req, res) => {\n  if (!req.file) {\n    return res.status(400).json({ error: 'No audio file uploaded' });\n  }\n\n  const filePath = req.file.path;\n\n  try {\n    if (!openai) {\n      return res.status(503).json({ error: 'Audio transcription is not configured. Set OPENAI_API_KEY in environment.' });\n    }\n\n    // Rename temp file to include original extension (Whisper needs it)\n    const ext = path.extname(req.file.originalname).toLowerCase() || '.mp3';\n    const namedPath = filePath + ext;\n    fs.renameSync(filePath, namedPath);\n\n    const transcription = await openai.audio.transcriptions.create({\n      file: fs.createReadStream(namedPath),\n      model: 'whisper-1',\n      response_format: 'text',\n    });\n\n    // Clean up temp file\n    fs.unlink(namedPath, () => {});\n\n    const text = typeof transcription === 'string' ? transcription : transcription.text || '';\n    if (!text.trim()) {\n      return res.status(422).json({ error: 'Could not transcribe audio. The file may be empty or inaudible.' });\n    }\n\n    res.json({ success: true, text });\n\n  } catch (error) {\n    // Clean up temp file on error\n    try { fs.unlinkSync(filePath); } catch {}\n    try { fs.unlinkSync(filePath + path.extname(req.file.originalname)); } catch {}\n\n    console.error('[TRANSCRIBE ERROR]', error);\n\n    if (error.status === 401) {\n      return res.status(503).json({ error: 'Invalid OpenAI API key. Check OPENAI_API_KEY.' });\n    }\n    res.status(500).json({ error: 'Transcription failed: ' + (error.message || 'Unknown error') });\n  }\n});\n\nmodule.exports = router;\n"}, "117c10c77381acdd2c3ffc32eefa4d6d429ad87d": {"t": 1785753930.9575222, "n": 9881, "h": "dcbda06467dca86a", "c": "// ============================================================\n//  routes/summaries.js - Learning Summaries Routes\n// ============================================================\n\nconst express = require('express');\nconst router = express.Router();\nconst jwt = require('jsonwebtoken');\nconst multer = require('multer');\nconst path = require('path');\nconst fs = require('fs');\nconst OpenAI = require('openai');\nconst supabase = require('../config/supabase');\n\n// ── Multer config for audio uploads (store in /tmp, max 25MB)\nconst upload = multer({\n  dest: path.join(__dirname, '..', 'tmp'),\n  limits: { fileSize: 25 * 1024 * 1024 },\n  fileFilter: (req, file, cb) => {\n    const allowed = ['.mp3', '.wav', '.m4a', '.ogg', '.webm', '.mp4', '.mpeg', '.mpga'];\n    const ext = path.extname(file.originalname).toLowerCase();\n    if (allowed.includes(ext)) cb(null, true);\n    else cb(new Error('Unsupported audio format. Use MP3, WAV, M4A, or OGG.'));\n  }\n});\n\n// ── OpenAI client (for Whisper transcription)\nconst openai = process.env.OPENAI_API_KEY\n  ? new OpenAI({ apiKey: process.env.OPENAI_API_KEY })\n  : null;\n\n// ── Middleware: Check JWT token\nconst authenticateToken = (req, res, next) => {\n  const authHeader = req.headers['authorization'];\n  const token = authHeader && authHeader.split(' ')[1];\n\n  if (!token) {\n    return res.status(401).json({ error: 'No token provided' });\n  }\n\n  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {\n    if (err) {\n      return res.status(403).json({ error: 'Invalid token' });\n    }\n    req.user = user;\n    next();\n  });\n};\n\nfunction buildSummaryFromText(text, style = 'simple', occupation = 'general') {\n  const cleaned = String(text || '').replace(/\\s+/g, ' ').trim();\n  if (!cleaned) return '';\n\n  const sentences = cleaned.split(/(?<=[.!?])\\s+/).filter(Boolean);\n  if (sentences.length === 0) return cleaned;\n\n  // Split into logical groups (intro, body, conclusion)\n  const total = sentences.length;\n  const introEnd = Math.max(1, Math.ceil(total * 0.2));\n  const bodyEnd = Math.max(introEnd + 1, Math.ceil(total * 0.75));\n\n  const intro = sentences.slice(0, introEnd);\n  const body = sentences.slice(introEnd, bodyEnd);\n  const conclusion = sentences.slice(bodyEnd);\n\n  const parts = [];\n\n  if (style === 'bullets') {\n    parts.push('## Overview');\n    intro.forEach(s => parts.push(`- ${s}`));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Key Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      conclusion.forEach(s => parts.push(`- ${s}`));\n    }\n  } else if (style === 'detailed') {\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Detailed Analysis');\n      // Group body sentences into paragraphs of 3\n      for (let i = 0; i < body.length; i += 3) {\n        parts.push(body.slice(i, i + 3).join(' '));\n      }\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Summary & Takeaways');\n      parts.push(conclusion.join(' '));\n    }\n  } else {\n    // simple\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Main Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      parts.push(conclusion.join(' '));\n    }\n  }\n\n  return parts.join('\\n');\n}\n\n// ── GET /api/summaries\nrouter.get('/', authenticateToken, async (req, res) => {\n  try {\n    const { data: summaries, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('user_id', req.user.id)\n      .order('created_at', { ascending: false });\n\n    if (error) throw error;\n\n    res.json({ success: true, summaries: summaries || [] });\n\n  } catch (error) {\n    console.error('[GET SUMMARIES ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── GET /api/summaries/:id\nrouter.get('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (error || !summary) {\n      return res.status(404).json({ error: 'Summary not found' });\n    }\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[GET SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries\nrouter.post('/', authenticateToken, async (req, res) => {\n  try {\n    // ── Enforce free plan limit (3 summaries per month)\n    const userPlan = req.user.plan || 'free';\n    if (userPlan === 'free') {\n      const startOfMonth = new Date();\n      startOfMonth.setDate(1);\n      startOfMonth.setHours(0, 0, 0, 0);\n\n      const { count, error: countErr } = await supabase\n        .from('summaries')\n        .select('id', { count: 'exact', head: true })\n        .eq('user_id', req.user.id)\n        .gte('created_at', startOfMonth.toISOString());\n\n      if (!countErr && count >= 3) {\n        return res.status(403).json({ error: 'Free plan limit reached (3 summaries/month). Upgrade to Pro for unlimited access.', upgradeRequired: true });\n      }\n    }\n\n    const { title, text, language, occupation, style, model } = req.body;\n\n    const fileName = title || `Summary ${new Date().toLocaleString()}`;\n    const summaryText = buildSummaryFromText(text, style, occupation);\n\n    if (!summaryText) {\n      return res.status(400).json({ error: 'Text content is required' });\n    }\n\n    const wordCount = summaryText.trim().split(/\\s+/).length;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .insert([{\n        user_id: req.user.id,\n        file_name: fileName,\n        file_type: 'text',\n        file_size_kb: Math.round(new Blob([text || '']).size / 1024) || 0,\n        language: language || 'english-simple',\n        occupation: occupation || 'general',\n        style: style || 'simple',\n        word_count: wordCount,\n        summary_text: summaryText,\n        created_at: new Date().toISOString()\n      }])\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.status(201).json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[CREATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── PUT /api/summaries/:id\nrouter.put('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n    const { file_name, summary_text } = req.body;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const updates = {};\n    if (file_name) updates.file_name = file_name;\n    if (summary_text) updates.summary_text = summary_text;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .update(updates)\n      .eq('id', id)\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[UPDATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── DELETE /api/summaries/:id\nrouter.delete('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { error } = await supabase\n      .from('summaries')\n      .delete()\n      .eq('id', id);\n\n    if (error) throw error;\n\n    res.json({ success: true, message: 'Summary deleted' });\n\n  } catch (error) {\n    console.error('[DELETE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries/transcribe (Audio → Text via Whisper)\nrouter.post('/transcribe', authenticateToken, upload.single('audio'), async (req, res) => {\n  if (!req.file) {\n    return res.status(400).json({ error: 'No audio file uploaded' });\n  }\n\n  const filePath = req.file.path;\n\n  try {\n    if (!openai) {\n      return res.status(503).json({ error: 'Audio transcription is not configured. Set OPENAI_API_KEY in environment.' });\n    }\n\n    // Rename temp file to include original extension (Whisper needs it)\n    const ext = path.extname(req.file.originalname).toLowerCase() || '.mp3';\n    const namedPath = filePath + ext;\n    fs.renameSync(filePath, namedPath);\n\n    const transcription = await openai.audio.transcriptions.create({\n      file: fs.createReadStream(namedPath),\n      model: 'whisper-1',\n      response_format: 'text',\n    });\n\n    // Clean up temp file\n    fs.unlink(namedPath, () => {});\n\n    const text = typeof transcription === 'string' ? transcription : transcription.text || '';\n    if (!text.trim()) {\n      return res.status(422).json({ error: 'Could not transcribe audio. The file may be empty or inaudible.' });\n    }\n\n    res.json({ success: true, text });\n\n  } catch (error) {\n    // Clean up temp file on error\n    try { fs.unlinkSync(filePath); } catch {}\n    try { fs.unlinkSync(filePath + path.extname(req.file.originalname)); } catch {}\n\n    console.error('[TRANSCRIBE ERROR]', error);\n\n    if (error.status === 401) {\n      return res.status(503).json({ error: 'Invalid OpenAI API key. Check OPENAI_API_KEY.' });\n    }\n    res.status(500).json({ error: 'Transcription failed: ' + (error.message || 'Unknown error') });\n  }\n});\n\nmodule.exports = router;\n"}, "e35b017aa6d20ab9b85d13a960ff527900f8f3ff": {"t": 1785753933.2090695, "n": 7436, "h": "7ac68ee4e635d76e", "c": "// ============================================================\n//  routes/summaries.js - Learning Summaries Routes\n// ============================================================\n\nconst express = require('express');\nconst router = express.Router();\nconst jwt = require('jsonwebtoken');\nconst supabase = require('../config/supabase');\n\n// ── Middleware: Check JWT token\nconst authenticateToken = (req, res, next) => {\n  const authHeader = req.headers['authorization'];\n  const token = authHeader && authHeader.split(' ')[1];\n\n  if (!token) {\n    return res.status(401).json({ error: 'No token provided' });\n  }\n\n  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {\n    if (err) {\n      return res.status(403).json({ error: 'Invalid token' });\n    }\n    req.user = user;\n    next();\n  });\n};\n\nfunction buildSummaryFromText(text, style = 'simple', occupation = 'general') {\n  const cleaned = String(text || '').replace(/\\s+/g, ' ').trim();\n  if (!cleaned) return '';\n\n  const sentences = cleaned.split(/(?<=[.!?])\\s+/).filter(Boolean);\n  if (sentences.length === 0) return cleaned;\n\n  // Split into logical groups (intro, body, conclusion)\n  const total = sentences.length;\n  const introEnd = Math.max(1, Math.ceil(total * 0.2));\n  const bodyEnd = Math.max(introEnd + 1, Math.ceil(total * 0.75));\n\n  const intro = sentences.slice(0, introEnd);\n  const body = sentences.slice(introEnd, bodyEnd);\n  const conclusion = sentences.slice(bodyEnd);\n\n  const parts = [];\n\n  if (style === 'bullets') {\n    parts.push('## Overview');\n    intro.forEach(s => parts.push(`- ${s}`));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Key Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      conclusion.forEach(s => parts.push(`- ${s}`));\n    }\n  } else if (style === 'detailed') {\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Detailed Analysis');\n      // Group body sentences into paragraphs of 3\n      for (let i = 0; i < body.length; i += 3) {\n        parts.push(body.slice(i, i + 3).join(' '));\n      }\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Summary & Takeaways');\n      parts.push(conclusion.join(' '));\n    }\n  } else {\n    // simple\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Main Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      parts.push(conclusion.join(' '));\n    }\n  }\n\n  return parts.join('\\n');\n}\n\n// ── GET /api/summaries\nrouter.get('/', authenticateToken, async (req, res) => {\n  try {\n    const { data: summaries, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('user_id', req.user.id)\n      .order('created_at', { ascending: false });\n\n    if (error) throw error;\n\n    res.json({ success: true, summaries: summaries || [] });\n\n  } catch (error) {\n    console.error('[GET SUMMARIES ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── GET /api/summaries/:id\nrouter.get('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (error || !summary) {\n      return res.status(404).json({ error: 'Summary not found' });\n    }\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[GET SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries\nrouter.post('/', authenticateToken, async (req, res) => {\n  try {\n    // ── Enforce free plan limit (3 summaries per month)\n    const userPlan = req.user.plan || 'free';\n    if (userPlan === 'free') {\n      const startOfMonth = new Date();\n      startOfMonth.setDate(1);\n      startOfMonth.setHours(0, 0, 0, 0);\n\n      const { count, error: countErr } = await supabase\n        .from('summaries')\n        .select('id', { count: 'exact', head: true })\n        .eq('user_id', req.user.id)\n        .gte('created_at', startOfMonth.toISOString());\n\n      if (!countErr && count >= 3) {\n        return res.status(403).json({ error: 'Free plan limit reached (3 summaries/month). Upgrade to Pro for unlimited access.', upgradeRequired: true });\n      }\n    }\n\n    const { title, text, language, occupation, style, model } = req.body;\n\n    const fileName = title || `Summary ${new Date().toLocaleString()}`;\n    const summaryText = buildSummaryFromText(text, style, occupation);\n\n    if (!summaryText) {\n      return res.status(400).json({ error: 'Text content is required' });\n    }\n\n    const wordCount = summaryText.trim().split(/\\s+/).length;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .insert([{\n        user_id: req.user.id,\n        file_name: fileName,\n        file_type: 'text',\n        file_size_kb: Math.round(new Blob([text || '']).size / 1024) || 0,\n        language: language || 'english-simple',\n        occupation: occupation || 'general',\n        style: style || 'simple',\n        word_count: wordCount,\n        summary_text: summaryText,\n        created_at: new Date().toISOString()\n      }])\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.status(201).json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[CREATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── PUT /api/summaries/:id\nrouter.put('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n    const { file_name, summary_text } = req.body;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const updates = {};\n    if (file_name) updates.file_name = file_name;\n    if (summary_text) updates.summary_text = summary_text;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .update(updates)\n      .eq('id', id)\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[UPDATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── DELETE /api/summaries/:id\nrouter.delete('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { error } = await supabase\n      .from('summaries')\n      .delete()\n      .eq('id', id);\n\n    if (error) throw error;\n\n    res.json({ success: true, message: 'Summary deleted' });\n\n  } catch (error) {\n    console.error('[DELETE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\nmodule.exports = router;\n"}, "63f1c865033a46c9f5c77518c6eab8f8be94a31b": {"t": 1785753934.9597495, "n": 6751, "h": "322890b99fa3c86e", "c": "// ============================================================\n//  routes/summaries.js - Learning Summaries Routes\n// ============================================================\n\nconst express = require('express');\nconst router = express.Router();\nconst jwt = require('jsonwebtoken');\nconst supabase = require('../config/supabase');\n\n// ── Middleware: Check JWT token\nconst authenticateToken = (req, res, next) => {\n  const authHeader = req.headers['authorization'];\n  const token = authHeader && authHeader.split(' ')[1];\n\n  if (!token) {\n    return res.status(401).json({ error: 'No token provided' });\n  }\n\n  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {\n    if (err) {\n      return res.status(403).json({ error: 'Invalid token' });\n    }\n    req.user = user;\n    next();\n  });\n};\n\nfunction buildSummaryFromText(text, style = 'simple', occupation = 'general') {\n  const cleaned = String(text || '').replace(/\\s+/g, ' ').trim();\n  if (!cleaned) return '';\n\n  const sentences = cleaned.split(/(?<=[.!?])\\s+/).filter(Boolean);\n  if (sentences.length === 0) return cleaned;\n\n  // Split into logical groups (intro, body, conclusion)\n  const total = sentences.length;\n  const introEnd = Math.max(1, Math.ceil(total * 0.2));\n  const bodyEnd = Math.max(introEnd + 1, Math.ceil(total * 0.75));\n\n  const intro = sentences.slice(0, introEnd);\n  const body = sentences.slice(introEnd, bodyEnd);\n  const conclusion = sentences.slice(bodyEnd);\n\n  const parts = [];\n\n  if (style === 'bullets') {\n    parts.push('## Overview');\n    intro.forEach(s => parts.push(`- ${s}`));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Key Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      conclusion.forEach(s => parts.push(`- ${s}`));\n    }\n  } else if (style === 'detailed') {\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Detailed Analysis');\n      // Group body sentences into paragraphs of 3\n      for (let i = 0; i < body.length; i += 3) {\n        parts.push(body.slice(i, i + 3).join(' '));\n      }\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Summary & Takeaways');\n      parts.push(conclusion.join(' '));\n    }\n  } else {\n    // simple\n    parts.push('## Overview');\n    parts.push(intro.join(' '));\n    if (body.length) {\n      parts.push('');\n      parts.push('## Main Points');\n      body.forEach(s => parts.push(`- ${s}`));\n    }\n    if (conclusion.length) {\n      parts.push('');\n      parts.push('## Conclusion');\n      parts.push(conclusion.join(' '));\n    }\n  }\n\n  return parts.join('\\n');\n}\n\n// ── GET /api/summaries\nrouter.get('/', authenticateToken, async (req, res) => {\n  try {\n    const { data: summaries, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('user_id', req.user.id)\n      .order('created_at', { ascending: false });\n\n    if (error) throw error;\n\n    res.json({ success: true, summaries: summaries || [] });\n\n  } catch (error) {\n    console.error('[GET SUMMARIES ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── GET /api/summaries/:id\nrouter.get('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (error || !summary) {\n      return res.status(404).json({ error: 'Summary not found' });\n    }\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[GET SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries\nrouter.post('/', authenticateToken, async (req, res) => {\n  try {\n    const { title, text, language, occupation, style, model } = req.body;\n\n    const fileName = title || `Summary ${new Date().toLocaleString()}`;\n    const summaryText = buildSummaryFromText(text, style, occupation);\n\n    if (!summaryText) {\n      return res.status(400).json({ error: 'Text content is required' });\n    }\n\n    const wordCount = summaryText.trim().split(/\\s+/).length;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .insert([{\n        user_id: req.user.id,\n        file_name: fileName,\n        file_type: 'text',\n        file_size_kb: Math.round(new Blob([text || '']).size / 1024) || 0,\n        language: language || 'english-simple',\n        occupation: occupation || 'general',\n        style: style || 'simple',\n        word_count: wordCount,\n        summary_text: summaryText,\n        created_at: new Date().toISOString()\n      }])\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.status(201).json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[CREATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── PUT /api/summaries/:id\nrouter.put('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n    const { file_name, summary_text } = req.body;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const updates = {};\n    if (file_name) updates.file_name = file_name;\n    if (summary_text) updates.summary_text = summary_text;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .update(updates)\n      .eq('id', id)\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[UPDATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── DELETE /api/summaries/:id\nrouter.delete('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { error } = await supabase\n      .from('summaries')\n      .delete()\n      .eq('id', id);\n\n    if (error) throw error;\n\n    res.json({ success: true, message: 'Summary deleted' });\n\n  } catch (error) {\n    console.error('[DELETE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\nmodule.exports = router;\n"}, "616a430b60c8a24e83e0513d2a3254a8c7a6259c": {"t": 1785753936.164765, "n": 5239, "h": "a534b4aff6391760", "c": "// ============================================================\n//  routes/summaries.js - Learning Summaries Routes\n// ============================================================\n\nconst express = require('express');\nconst router = express.Router();\nconst jwt = require('jsonwebtoken');\nconst supabase = require('../config/supabase');\n\n// ── Middleware: Check JWT token\nconst authenticateToken = (req, res, next) => {\n  const authHeader = req.headers['authorization'];\n  const token = authHeader && authHeader.split(' ')[1];\n\n  if (!token) {\n    return res.status(401).json({ error: 'No token provided' });\n  }\n\n  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {\n    if (err) {\n      return res.status(403).json({ error: 'Invalid token' });\n    }\n    req.user = user;\n    next();\n  });\n};\n\nfunction buildSummaryFromText(text, style = 'simple') {\n  const cleaned = String(text || '').replace(/\\s+/g, ' ').trim();\n  if (!cleaned) return '';\n\n  const sentences = cleaned.split(/(?<=[.!?])\\s+/).filter(Boolean);\n  if (style === 'bullets') {\n    return sentences.slice(0, 6).map(s => `- ${s}`).join('\\n');\n  }\n  if (style === 'detailed') {\n    return sentences.slice(0, 10).join(' ');\n  }\n  return sentences.slice(0, 4).join(' ');\n}\n\n// ── GET /api/summaries\nrouter.get('/', authenticateToken, async (req, res) => {\n  try {\n    const { data: summaries, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('user_id', req.user.id)\n      .order('created_at', { ascending: false });\n\n    if (error) throw error;\n\n    res.json({ success: true, summaries: summaries || [] });\n\n  } catch (error) {\n    console.error('[GET SUMMARIES ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── GET /api/summaries/:id\nrouter.get('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (error || !summary) {\n      return res.status(404).json({ error: 'Summary not found' });\n    }\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[GET SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries\nrouter.post('/', authenticateToken, async (req, res) => {\n  try {\n    const { title, text, language, occupation, style, model } = req.body;\n\n    const fileName = title || `Summary ${new Date().toLocaleString()}`;\n    const summaryText = buildSummaryFromText(text, style);\n\n    if (!summaryText) {\n      return res.status(400).json({ error: 'Text content is required' });\n    }\n\n    const wordCount = summaryText.trim().split(/\\s+/).length;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .insert([{\n        user_id: req.user.id,\n        file_name: fileName,\n        file_type: 'text',\n        file_size_kb: Math.round(new Blob([text || '']).size / 1024) || 0,\n        language: language || 'english-simple',\n        occupation: occupation || 'general',\n        style: style || 'simple',\n        word_count: wordCount,\n        summary_text: summaryText,\n        created_at: new Date().toISOString()\n      }])\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.status(201).json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[CREATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── PUT /api/summaries/:id\nrouter.put('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n    const { file_name, summary_text } = req.body;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const updates = {};\n    if (file_name) updates.file_name = file_name;\n    if (summary_text) updates.summary_text = summary_text;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .update(updates)\n      .eq('id', id)\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[UPDATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── DELETE /api/summaries/:id\nrouter.delete('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { error } = await supabase\n      .from('summaries')\n      .delete()\n      .eq('id', id);\n\n    if (error) throw error;\n\n    res.json({ success: true, message: 'Summary deleted' });\n\n  } catch (error) {\n    console.error('[DELETE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\nmodule.exports = router;\n"}, "f64da5bdf1e2131313e713ceac46e4904b20e2ff": {"t": 1785753939.0990374, "n": 4905, "h": "b79db232161c636e", "c": "// ============================================================\n//  routes/summaries.js - Learning Summaries Routes\n// ============================================================\n\nconst express = require('express');\nconst router = express.Router();\nconst jwt = require('jsonwebtoken');\nconst supabase = require('../config/supabase');\n\n// ── Middleware: Check JWT token\nconst authenticateToken = (req, res, next) => {\n  const authHeader = req.headers['authorization'];\n  const token = authHeader && authHeader.split(' ')[1];\n\n  if (!token) {\n    return res.status(401).json({ error: 'No token provided' });\n  }\n\n  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {\n    if (err) {\n      return res.status(403).json({ error: 'Invalid token' });\n    }\n    req.user = user;\n    next();\n  });\n};\n\nfunction buildSummaryFromText(text, style = 'simple') {\n  const cleaned = String(text || '').replace(/\\s+/g, ' ').trim();\n  if (!cleaned) return '';\n\n  const sentences = cleaned.split(/(?<=[.!?])\\s+/).filter(Boolean);\n  if (style === 'bullets') {\n    return sentences.slice(0, 6).map(s => `- ${s}`).join('\\n');\n  }\n  if (style === 'detailed') {\n    return sentences.slice(0, 10).join(' ');\n  }\n  return sentences.slice(0, 4).join(' ');\n}\n\n// ── GET /api/summaries\nrouter.get('/', authenticateToken, async (req, res) => {\n  try {\n    const { data: summaries, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('user_id', req.user.id)\n      .order('created_at', { ascending: false });\n\n    if (error) throw error;\n\n    res.json({ success: true, summaries: summaries || [] });\n\n  } catch (error) {\n    console.error('[GET SUMMARIES ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── GET /api/summaries/:id\nrouter.get('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (error || !summary) {\n      return res.status(404).json({ error: 'Summary not found' });\n    }\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[GET SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries\nrouter.post('/', authenticateToken, async (req, res) => {\n  try {\n    const { title, content, text, courseId, style } = req.body;\n\n    const finalTitle = title || `Summary ${new Date().toLocaleString()}`;\n    const finalContent = content || buildSummaryFromText(text, style);\n\n    if (!finalTitle || !finalContent) {\n      return res.status(400).json({ error: 'Title and content required' });\n    }\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .insert([{\n        user_id: req.user.id,\n        title: finalTitle,\n        content: finalContent,\n        course_id: courseId || null,\n        created_at: new Date().toISOString()\n      }])\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.status(201).json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[CREATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── PUT /api/summaries/:id\nrouter.put('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n    const { title, content } = req.body;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .update({\n        title,\n        content,\n        updated_at: new Date().toISOString()\n      })\n      .eq('id', id)\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[UPDATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── DELETE /api/summaries/:id\nrouter.delete('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { error } = await supabase\n      .from('summaries')\n      .delete()\n      .eq('id', id);\n\n    if (error) throw error;\n\n    res.json({ success: true, message: 'Summary deleted' });\n\n  } catch (error) {\n    console.error('[DELETE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\nmodule.exports = router;\n"}, "8370feb95699a530a6be9bc09a1308d40cec2c21": {"t": 1785753940.7750916, "n": 4271, "h": "b842a17c864037c4", "c": "// ============================================================\n//  routes/summaries.js - Learning Summaries Routes\n// ============================================================\n\nconst express = require('express');\nconst router = express.Router();\nconst jwt = require('jsonwebtoken');\nconst supabase = require('../config/supabase');\n\n// ── Middleware: Check JWT token\nconst authenticateToken = (req, res, next) => {\n  const authHeader = req.headers['authorization'];\n  const token = authHeader && authHeader.split(' ')[1];\n\n  if (!token) {\n    return res.status(401).json({ error: 'No token provided' });\n  }\n\n  jwt.verify(token, process.env.JWT_SECRET, (err, user) => {\n    if (err) {\n      return res.status(403).json({ error: 'Invalid token' });\n    }\n    req.user = user;\n    next();\n  });\n};\n\n// ── GET /api/summaries\nrouter.get('/', authenticateToken, async (req, res) => {\n  try {\n    const { data: summaries, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('user_id', req.user.id)\n      .order('created_at', { ascending: false });\n\n    if (error) throw error;\n\n    res.json({ success: true, summaries: summaries || [] });\n\n  } catch (error) {\n    console.error('[GET SUMMARIES ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── GET /api/summaries/:id\nrouter.get('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .select('*')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (error || !summary) {\n      return res.status(404).json({ error: 'Summary not found' });\n    }\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[GET SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── POST /api/summaries\nrouter.post('/', authenticateToken, async (req, res) => {\n  try {\n    const { title, content, courseId } = req.body;\n\n    if (!title || !content) {\n      return res.status(400).json({ error: 'Title and content required' });\n    }\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .insert([{\n        user_id: req.user.id,\n        title,\n        content,\n        course_id: courseId || null,\n        created_at: new Date().toISOString()\n      }])\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.status(201).json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[CREATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── PUT /api/summaries/:id\nrouter.put('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n    const { title, content } = req.body;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { data: summary, error } = await supabase\n      .from('summaries')\n      .update({\n        title,\n        content,\n        updated_at: new Date().toISOString()\n      })\n      .eq('id', id)\n      .select()\n      .single();\n\n    if (error) throw error;\n\n    res.json({ success: true, summary });\n\n  } catch (error) {\n    console.error('[UPDATE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\n// ── DELETE /api/summaries/:id\nrouter.delete('/:id', authenticateToken, async (req, res) => {\n  try {\n    const { id } = req.params;\n\n    // Verify ownership\n    const { data: existing } = await supabase\n      .from('summaries')\n      .select('id')\n      .eq('id', id)\n      .eq('user_id', req.user.id)\n      .single();\n\n    if (!existing) {\n      return res.status(403).json({ error: 'Unauthorized' });\n    }\n\n    const { error } = await supabase\n      .from('summaries')\n      .delete()\n      .eq('id', id);\n\n    if (error) throw error;\n\n    res.json({ success: true, message: 'Summary deleted' });\n\n  } catch (error) {\n    console.error('[DELETE SUMMARY ERROR]', error);\n    res.status(500).json({ error: error.message });\n  }\n});\n\nmodule.exports = router;\n"}, "651f569394abb69af97ab5a35e17f0bb4999ec4e": {"t": 1785753944.714404, "n": 8378, "h": "30e0738bd15d484a", "c": "// backend/routes/summaries.js — AI summarization endpoint\nconst router = require('express').Router();\nconst multer = require('multer');\nconst Anthropic = require('@anthropic-ai/sdk');\nconst OpenAI   = require('openai');\nconst { requireUser, requirePlan } = require('../middleware/auth');\nconst db = require('../config/db');\n\nconst upload   = multer({ storage: multer.memoryStorage(), limits: { fileSize: 100 * 1024 * 1024 } });\nconst claude   = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY });\nconst gpt      = new OpenAI({ apiKey: process.env.OPENAI_API_KEY });\nconst deepseek = new OpenAI({ apiKey: process.env.DEEPSEEK_API_KEY, baseURL: 'https://api.deepseek.com' });\n\nconst LANG_MAP = {\n  'english-simple': 'simple, clear English with short sentences',\n  'hinglish': 'Hinglish — natural Hindi+English mix (e.g. \"Revenue badh gayi\", \"Growth ho rahi hai\")',\n  'hindi': 'pure Hindi in Devanagari script',\n  'spanish':'Spanish','french':'French','german':'German','arabic':'Arabic (العربية)',\n  'japanese':'Japanese (日本語)','korean':'Korean (한국어)','chinese':'Simplified Chinese',\n  'portuguese':'Brazilian Portuguese','italian':'Italian','russian':'Russian',\n  'bengali':'Bengali (বাংলা)','urdu':'Urdu (اردو)','tamil':'Tamil (தமிழ்)',\n  'telugu':'Telugu (తెలుగు)','marathi':'Marathi (मराठी)','dutch':'Dutch','swedish':'Swedish',\n};\n\nconst OCC_FOCUS = {\n  student:  'definitions, concepts, exam key points, formulas, examples',\n  business: 'revenue, KPIs, growth rates, profit margins, action items, deadlines',\n  medical:  'diagnoses, symptoms, treatments, medications, dosages, prognosis',\n  legal:    'clauses, obligations, deadlines, parties, penalties, jurisdiction',\n  tech:     'APIs, specs, architecture, requirements, frameworks, performance',\n  research: 'methodology, sample size, findings, statistics, conclusions',\n  teacher:  'learning objectives, key concepts, examples, assessments',\n  general:  'main ideas, important facts, conclusions',\n};\n\n// POST /api/summaries — create summary\nrouter.post('/', requireUser, upload.single('file'), async (req, res) => {\n  try {\n    const { language='english-simple', occupation='general', style='simple', text, model='gpt' } = req.body;\n\n    // Check free quota\n    if (req.user.plan === 'free') {\n      const [[u]] = await db.execute('SELECT docs_this_month FROM users WHERE id=?', [req.user.sub]);\n      if (u.docs_this_month >= 3) {\n        return res.status(403).json({ error:'Free plan limit reached (3/month). Please upgrade.', upgradeRequired:true });\n      }\n    }\n\n    let content = '';\n    let fileName = 'pasted-text', fileType = 'text', fileSize = 0;\n\n    if (req.file) {\n      fileName = req.file.originalname;\n      fileSize = Math.round(req.file.size / 1024);\n      const ext = fileName.split('.').pop().toLowerCase();\n      fileType = ['mp3','wav','m4a','ogg'].includes(ext) ? 'audio' : ['ppt','pptx'].includes(ext) ? 'ppt' : 'pdf';\n      content  = `[File: ${fileName}]\\n${req.file.buffer.toString('utf-8').substring(0,6000)}`;\n    } else if (text) {\n      content = text;\n    } else {\n      return res.status(400).json({ error:'Provide a file or text.' });\n    }\n\n    const styleInstr = {\n      simple:   'Write a concise summary in 3-4 readable paragraphs.',\n      detailed: 'Write a comprehensive summary in 6-8 paragraphs.',\n      bullets:  'Write summary using ## headings and • bullet points.',\n    };\n\n    const prompt = `You are an expert summarizer for a ${occupation} professional. Summarize in ${LANG_MAP[language]||'simple English'}.\n\nOCCUPATION FOCUS — highlight: ${OCC_FOCUS[occupation]||OCC_FOCUS.general}\n${styleInstr[style]}\n\nAfter summary add exactly:\n---JSON---\n{\"highlights\":[{\"icon\":\"📊\",\"val\":\"VALUE\",\"label\":\"LABEL\"},{\"icon\":\"📅\",\"val\":\"VALUE\",\"label\":\"LABEL\"},{\"icon\":\"⚡\",\"val\":\"VALUE\",\"label\":\"LABEL\"}],\"takeaways\":[\"point1\",\"point2\",\"point3\"]}\n---END---\n\n${content.substring(0,7000)}`;\n\n    // Stream response\n    res.setHeader('Content-Type','text/plain; charset=utf-8');\n    res.setHeader('X-Accel-Buffering','no');\n\n    let full = '';\n\n    try {\n      console.log('[Summarize] Using model:', model, '| API Key set:', !!process.env.OPENAI_API_KEY);\n      if (model === 'gpt') {\n        console.log('[GPT] Calling OpenAI API...');\n        const stream = await gpt.chat.completions.create({ model:'gpt-4o-mini', max_tokens:1200, messages:[{role:'user',content:prompt}], stream:true });\n        console.log('[GPT] Stream started');\n        for await (const chunk of stream) {\n          const text = chunk.choices[0]?.delta?.content || '';\n          if (text) { full += text; res.write(text); }\n        }\n        console.log('[GPT] Stream completed');\n      } else if (model === 'deepseek') {\n        console.log('[DeepSeek] Calling API...');\n        const stream = await deepseek.chat.completions.create({ model:'deepseek-chat', max_tokens:1200, messages:[{role:'user',content:prompt}], stream:true });\n        for await (const chunk of stream) {\n          const text = chunk.choices[0]?.delta?.content || '';\n          if (text) { full += text; res.write(text); }\n        }\n        console.log('[DeepSeek] Stream completed');\n      } else {\n        // default: claude\n        console.log('[Claude] Calling API...');\n        const stream = claude.messages.stream({ model:'claude-sonnet-4-6', max_tokens:1200, messages:[{role:'user',content:prompt}] });\n        for await (const chunk of stream) {\n          if (chunk.type==='content_block_delta' && chunk.delta?.text) {\n            full += chunk.delta.text; res.write(chunk.delta.text);\n          }\n        }\n        console.log('[Claude] Stream completed');\n      }\n    } catch (aiError) {\n      console.error('[AI API Error]', {\n        status: aiError.status,\n        message: aiError.message,\n        code: aiError.code,\n        type: aiError.type,\n        error: aiError.error,\n        full: aiError.toString()\n      });\n      // Fallback to GPT if Claude fails\n      if (model !== 'gpt') {\n        console.log('[Fallback] Model', model, 'failed, trying GPT...');\n        try {\n          const stream = await gpt.chat.completions.create({ model:'gpt-4o-mini', max_tokens:1200, messages:[{role:'user',content:prompt}], stream:true });\n          for await (const chunk of stream) {\n            const text = chunk.choices[0]?.delta?.content || '';\n            if (text) { full += text; res.write(text); }\n          }\n          console.log('[GPT Fallback] Succeeded');\n        } catch (gptError) {\n          console.error('[GPT Fallback Error]', gptError.status, gptError.message);\n          throw gptError;\n        }\n      } else {\n        throw aiError;\n      }\n    }\n\n    res.end();\n\n    // Save to DB (async, non-blocking)\n    const words = full.replace(/---JSON---[\\s\\S]*?---END---/,'').trim().split(/\\s+/).length;\n    db.execute(\n      `INSERT INTO summaries (user_id,file_name,file_type,file_size_kb,language,occupation,style,word_count,summary_text) VALUES (?,?,?,?,?,?,?,?,?)`,\n      [req.user.sub, fileName, fileType, fileSize, language, occupation, style, words, full.substring(0,60000)]\n    ).then(() => {\n      db.execute('UPDATE users SET docs_this_month=docs_this_month+1, total_docs=total_docs+1 WHERE id=?', [req.user.sub]);\n    }).catch(console.error);\n\n  } catch (e) {\n    console.error('[Summarize] Outer catch', {\n      message: e.message,\n      status: e.status,\n      code: e.code,\n      stack: e.stack\n    });\n    if (!res.headersSent) {\n      if (e.status === 401) {\n        return res.status(401).json({ error:'API key invalid or expired.' });\n      } else if (e.status === 429) {\n        return res.status(429).json({ error:'Rate limit exceeded. Try again in 1 minute.' });\n      } else if (e.code === 'ERR_MODULE_NOT_FOUND') {\n        return res.status(500).json({ error:'Missing AI SDK. Check server config.' });\n      } else {\n        return res.status(500).json({ error:'Summarization failed: ' + (e.message || 'Unknown error') });\n      }\n    }\n  }\n});\n\n// GET /api/summaries — list (admin or own)\nrouter.get('/', requireUser, async (req, res) => {\n  try {\n    const [rows] = await db.execute(\n      'SELECT id,file_name,language,occupation,style,word_count,created_at FROM summaries WHERE user_id=? ORDER BY created_at DESC LIMIT 50',\n      [req.user.sub]\n    );\n    res.json({ summaries: rows });\n  } catch { res.status(500).json({ error:'Fetch failed.' }); }\n});\n\nmodule.exports = router;\n"}}}}