# AudioForge Master Launch Script (PowerShell)
# Windows equivalent of launch.sh

param(
    [string]$Environment = "development",
    [switch]$SkipTests = $false,
    [switch]$DryRun = $false,
    [switch]$Help = $false
)

# Colors
$Colors = @{
    Red = "Red"
    Green = "Green"
    Yellow = "Yellow"
    Blue = "Cyan"
    Purple = "Magenta"
    Cyan = "Cyan"
}

function Write-Info { Write-Host "[INFO] $args" -ForegroundColor $Colors.Blue }
function Write-Success { Write-Host "[SUCCESS] $args" -ForegroundColor $Colors.Green }
function Write-Warning { Write-Host "[WARNING] $args" -ForegroundColor $Colors.Yellow }
function Write-Error { Write-Host "[ERROR] $args" -ForegroundColor $Colors.Red }
function Write-Step { 
    Write-Host "`n═══ $args ═══`n" -ForegroundColor $Colors.Purple 
}

if ($Help) {
    Write-Host @"
AudioForge Master Launch Script

Usage:
    .\scripts\launch.ps1 [-Environment ENV] [-SkipTests] [-DryRun] [-Help]

Options:
    -Environment ENV    Target environment (development|staging|production)
    -SkipTests         Skip test suite (not recommended for production)
    -DryRun           Show what would be done without executing
    -Help             Show this help message
"@
    exit 0
}

$ProjectRoot = Split-Path -Parent $PSScriptRoot

function Test-Command {
    param([string]$Command)
    $null = Get-Command $Command -ErrorAction SilentlyContinue
    return $?
}

function Invoke-Step {
    param([scriptblock]$Action)
    if ($DryRun) {
        Write-Host "[DRY-RUN] Would execute: $Action" -ForegroundColor Yellow
    } else {
        & $Action
    }
}

# Verify Prerequisites
Write-Step "Verifying Prerequisites"

if (-not (Test-Command python)) {
    Write-Error "Python not found!"
    exit 1
}
$pythonVersion = python --version
Write-Info "Python version: $pythonVersion"

if (-not (Test-Command node)) {
    Write-Error "Node.js not found!"
    exit 1
}
$nodeVersion = node --version
Write-Info "Node version: $nodeVersion"

if (-not (Test-Command pnpm)) {
    Write-Warning "pnpm not found, installing..."
    npm install -g pnpm
}

Write-Success "All prerequisites satisfied"

# Run Verification
Write-Step "Running Verification Checks"
Set-Location $ProjectRoot

if (-not $DryRun) {
    python scripts/launch_verification.py --verbose --json launch-verification.json
    if ($LASTEXITCODE -ne 0) {
        Write-Error "Verification failed!"
        exit 1
    }
}

Write-Success "Verification checks passed"

# Setup Environment
Write-Step "Setting Up Environment: $Environment"

if (-not (Test-Path "backend\.env")) {
    Write-Warning "Backend .env not found, creating from example..."
    Copy-Item "backend\.env.example" "backend\.env"
}

if (-not (Test-Path "frontend\.env.local")) {
    Write-Warning "Frontend .env.local not found, creating..."
    if ($Environment -eq "production") {
        "NEXT_PUBLIC_API_URL=https://api.yourdomain.com" | Out-File -FilePath "frontend\.env.local" -Encoding UTF8
    } else {
        "NEXT_PUBLIC_API_URL=http://localhost:8000" | Out-File -FilePath "frontend\.env.local" -Encoding UTF8
    }
}

Write-Success "Environment configured"

# Install Dependencies
Write-Step "Installing Dependencies"

Write-Info "Installing backend dependencies..."
Set-Location "$ProjectRoot\backend"
Invoke-Step { pip install -e ".[dev]" }

Write-Info "Installing frontend dependencies..."
Set-Location "$ProjectRoot\frontend"
Invoke-Step { pnpm install --frozen-lockfile }

Write-Success "Dependencies installed"

# Run Tests
if (-not $SkipTests) {
    Write-Step "Running Test Suite"
    
    Write-Info "Running backend tests..."
    Set-Location "$ProjectRoot\backend"
    Invoke-Step { pytest tests/ -v --cov=app }
    
    Write-Info "Running frontend tests..."
    Set-Location "$ProjectRoot\frontend"
    Invoke-Step { pnpm test }
    Invoke-Step { pnpm run type-check }
    
    Write-Success "All tests passed"
} else {
    Write-Warning "Skipping tests (--SkipTests flag)"
}

# Build Applications
Write-Step "Building Applications"

Write-Info "Building frontend..."
Set-Location "$ProjectRoot\frontend"
Invoke-Step { pnpm run build }

Write-Success "Applications built successfully"

# Setup Database
Write-Step "Setting Up Database"

Set-Location "$ProjectRoot\backend"
Write-Info "Running database migrations..."
Invoke-Step { python scripts/init_db.py }

Write-Success "Database initialized"

# Start Services
Write-Step "Starting Services"

Set-Location $ProjectRoot

if (Test-Command docker-compose) {
    Write-Info "Starting services with Docker Compose..."
    Invoke-Step { docker-compose up -d }
    
    if (-not $DryRun) {
        Write-Info "Waiting for services to be healthy..."
        Start-Sleep -Seconds 10
        
        # Check backend health
        for ($i = 0; $i -lt 30; $i++) {
            try {
                $response = Invoke-WebRequest -Uri "http://localhost:8000/health" -UseBasicParsing -ErrorAction SilentlyContinue
                if ($response.StatusCode -eq 200) {
                    Write-Success "Backend is healthy"
                    break
                }
            } catch {}
            Start-Sleep -Seconds 2
        }
        
        # Check frontend health
        for ($i = 0; $i -lt 30; $i++) {
            try {
                $response = Invoke-WebRequest -Uri "http://localhost:3000" -UseBasicParsing -ErrorAction SilentlyContinue
                if ($response.StatusCode -eq 200) {
                    Write-Success "Frontend is healthy"
                    break
                }
            } catch {}
            Start-Sleep -Seconds 2
        }
    }
} else {
    Write-Warning "Docker Compose not available, starting services manually..."
    
    Write-Info "Starting backend..."
    Set-Location "$ProjectRoot\backend"
    Start-Process -FilePath "uvicorn" -ArgumentList "app.main:app --host 0.0.0.0 --port 8000" -NoNewWindow
    
    Write-Info "Starting frontend..."
    Set-Location "$ProjectRoot\frontend"
    Start-Process -FilePath "pnpm" -ArgumentList "start" -NoNewWindow
}

Write-Success "Services started"

# Generate Report
Write-Step "Generating Launch Report"

Set-Location $ProjectRoot
Invoke-Step { python scripts/generate_launch_report.py }

Write-Success "Launch report generated: LAUNCH_REPORT.html"

# Post-Launch Verification
Write-Step "Post-Launch Verification"

if (-not $DryRun) {
    Write-Info "Testing backend endpoint..."
    try {
        $response = Invoke-WebRequest -Uri "http://localhost:8000/health" -UseBasicParsing
        Write-Success "Backend responding"
    } catch {
        Write-Error "Backend not responding"
        exit 1
    }
    
    Write-Info "Testing frontend..."
    try {
        $response = Invoke-WebRequest -Uri "http://localhost:3000" -UseBasicParsing
        Write-Success "Frontend responding"
    } catch {
        Write-Error "Frontend not responding"
        exit 1
    }
}

Write-Success "Post-launch verification complete"

# Success Message
Write-Host "`n" -NoNewline
Write-Host "╔═══════════════════════════════════════════════════════════╗" -ForegroundColor Green
Write-Host "║                                                           ║" -ForegroundColor Green
Write-Host "║              🎉 LAUNCH SUCCESSFUL! 🎉                    ║" -ForegroundColor Green
Write-Host "║                                                           ║" -ForegroundColor Green
Write-Host "║         AudioForge is now running and ready!              ║" -ForegroundColor Green
Write-Host "║                                                           ║" -ForegroundColor Green
Write-Host "╔═══════════════════════════════════════════════════════════╗" -ForegroundColor Green
Write-Host ""

Write-Success "Backend: http://localhost:8000"
Write-Success "Frontend: http://localhost:3000"
Write-Success "API Docs: http://localhost:8000/docs"
Write-Success "Launch Report: file://$ProjectRoot/LAUNCH_REPORT.html"
Write-Host ""

if ($Environment -eq "production") {
    Write-Warning "Production deployment complete. Monitor logs and metrics closely."
}

Write-Info "🐼⚡ The panda has spoken. The launch is complete. 🎵"