#Requires -Version 5.1
<#
.SYNOPSIS
    Install opencode config on Windows
.DESCRIPTION
    Copies config template, replaces placeholders, sets up ~/.config/opencode/
#>

$ErrorActionPreference = "Stop"

$ConfigDir = "$env:USERPROFILE\.config\opencode"
$RepoDir = Split-Path -Parent $MyInvocation.MyCommand.Path

Write-Host "========================================" -ForegroundColor Cyan
Write-Host "  Opencode Config Installer (Windows)" -ForegroundColor Cyan
Write-Host "========================================" -ForegroundColor Cyan
Write-Host ""

# Check prerequisites
Write-Host "[*] Checking prerequisites..." -ForegroundColor Yellow

if (-not (Get-Command git -ErrorAction SilentlyContinue)) {
    Write-Error "Git not found. Install from https://git-scm.com/download/win"
}

if (-not (Get-Command npm -ErrorAction SilentlyContinue)) {
    Write-Error "npm not found. Install Node.js from https://nodejs.org/"
}

Write-Host "[OK] Prerequisites met" -ForegroundColor Green
Write-Host ""

# Get or prompt for API keys
function Get-EnvOrPrompt($name, $prompt, $required = $false) {
    $val = [Environment]::GetEnvironmentVariable($name, "User")
    if (-not $val) { $val = [Environment]::GetEnvironmentVariable($name, "Process") }
    
    if (-not $val) {
        if ($required) {
            $val = Read-Host -Prompt "$prompt (required)"
            if (-not $val) { Write-Error "$name is required" }
        } else {
            $val = Read-Host -Prompt "$prompt (optional, press Enter to skip)"
        }
        
        if ($val) {
            [Environment]::SetEnvironmentVariable($name, $val, "User")
            Write-Host "    Saved $name to User environment variables" -ForegroundColor DarkGray
        }
    } else {
        Write-Host "    Found $name in environment" -ForegroundColor DarkGray
    }
    
    return $val
}

Write-Host "[*] Configuring secrets..." -ForegroundColor Yellow
$apiKey = Get-EnvOrPrompt -name "OPENCODE_API_KEY" -prompt "Enter your OpenAI-compatible API key" -required $true
$braveKey = Get-EnvOrPrompt -name "BRAVE_API_KEY" -prompt "Enter your Brave Search API key"

# Detect or prompt for projects path
$projectsPath = [Environment]::GetEnvironmentVariable("PROJECTS_PATH", "User")
if (-not $projectsPath) { $projectsPath = [Environment]::GetEnvironmentVariable("PROJECTS_PATH", "Process") }

if (-not $projectsPath) {
    $defaultPath = "D:\Projects"
    $projectsPath = Read-Host -Prompt "Enter your projects directory path [default: $defaultPath]"
    if (-not $projectsPath) { $projectsPath = $defaultPath }
    
    if (-not (Test-Path $projectsPath)) {
        Write-Host "    Creating projects directory: $projectsPath" -ForegroundColor DarkYellow
        New-Item -ItemType Directory -Path $projectsPath -Force | Out-Null
    }
    
    [Environment]::SetEnvironmentVariable("PROJECTS_PATH", $projectsPath, "User")
}
Write-Host "[OK] Projects path: $projectsPath" -ForegroundColor Green
Write-Host ""

# Backup existing config
if (Test-Path "$ConfigDir\opencode.json") {
    $backup = "$ConfigDir\opencode.json.backup.$(Get-Date -Format 'yyyyMMddHHmmss')"
    Copy-Item "$ConfigDir\opencode.json" $backup
    Write-Host "[*] Backed up existing config to: $backup" -ForegroundColor Yellow
}

# Create config directory
if (-not (Test-Path $ConfigDir)) {
    New-Item -ItemType Directory -Path $ConfigDir -Force | Out-Null
}

# Generate opencode.json from template
Write-Host "[*] Generating opencode.json..." -ForegroundColor Yellow
$template = Get-Content "$RepoDir\opencode.json.template" -Raw

$template = $template -replace '\$\{OPENCODE_API_KEY\}', $apiKey
$template = $template -replace '\$\{BRAVE_API_KEY\}', $braveKey
$template = $template -replace '\$\{PROJECTS_PATH\}', ($projectsPath -replace '\\', '\\')

# Disable brave-search if no key
if (-not $braveKey) {
    Write-Host "    [!] No Brave API key - disabling brave-search MCP" -ForegroundColor DarkYellow
    $template = $template -replace '"enabled": true,\r?\n\s*"env": \{\r?\n\s*"BRAVE_API_KEY": "\$\{BRAVE_API_KEY\}"\r?\n\s*\}', '"enabled": false'
}

$template | Set-Content "$ConfigDir\opencode.json" -Encoding UTF8
Write-Host "[OK] Config written to $ConfigDir\opencode.json" -ForegroundColor Green
Write-Host ""

# Copy agents and skills
Write-Host "[*] Syncing agents and skills..." -ForegroundColor Yellow

# Remove old skills/agents to ensure clean sync
if (Test-Path "$ConfigDir\agents") { Remove-Item "$ConfigDir\agents" -Recurse -Force }
if (Test-Path "$ConfigDir\skills") { Remove-Item "$ConfigDir\skills" -Recurse -Force }

Copy-Item "$RepoDir\agents" $ConfigDir -Recurse
Copy-Item "$RepoDir\skills" $ConfigDir -Recurse

$skillCount = (Get-ChildItem "$ConfigDir\skills" -Directory).Count
Write-Host "[OK] Copied 3 agents and $skillCount skills" -ForegroundColor Green
Write-Host ""

# Install global dependencies
Write-Host "[*] Installing global dependencies..." -ForegroundColor Yellow

$globalPackages = @(
    "@colbymchenry/codegraph",
    "@brave/brave-search-mcp-server",
    "@modelcontextprotocol/server-filesystem",
    "@modelcontextprotocol/server-github",
    "@modelcontextprotocol/server-memory",
    "@modelcontextprotocol/server-sequential-thinking",
    "@playwright/mcp",
    "@upstash/context7-mcp",
    "mcp-remote"
)

foreach ($pkg in $globalPackages) {
    Write-Host "    Installing $pkg..." -ForegroundColor DarkGray -NoNewline
    npm install -g $pkg 2>$null | Out-Null
    Write-Host " OK" -ForegroundColor Green
}

# Install Python git MCP
Write-Host "    Installing Python git MCP..." -ForegroundColor DarkGray -NoNewline
python -m pip install mcp-server-git 2>$null | Out-Null
Write-Host " OK" -ForegroundColor Green

Write-Host ""
Write-Host "========================================" -ForegroundColor Cyan
Write-Host "  Installation Complete!" -ForegroundColor Green
Write-Host "========================================" -ForegroundColor Cyan
Write-Host ""
Write-Host "Next steps:" -ForegroundColor White
Write-Host "  1. Restart opencode to load new config" -ForegroundColor White
Write-Host "  2. Run 'opencode' in your project directory" -ForegroundColor White
Write-Host "  3. Initialize CodeGraph: codegraph init" -ForegroundColor White
Write-Host ""
Write-Host "Config location: $ConfigDir" -ForegroundColor DarkGray
Write-Host ""

# Verify config
Write-Host "[*] Verifying config..." -ForegroundColor Yellow
try {
    $config = Get-Content "$ConfigDir\opencode.json" | ConvertFrom-Json
    $mcpCount = ($config.mcp | Get-Member -MemberType NoteProperty).Count
    Write-Host "[OK] Config valid - $mcpCount MCP servers configured" -ForegroundColor Green
} catch {
    Write-Warning "Config may have syntax issues - please check $ConfigDir\opencode.json"
}