# MYP Platform - Kiosk CSS Build Script (PowerShell)
# Optimiert und minifiziert CSS für maximale Performance im Offline-Kiosk-Modus

Write-Host "Starte Kiosk CSS Build..." -ForegroundColor Green

# Erstelle Build-Verzeichnis
if (!(Test-Path "static\css\build")) {
    New-Item -ItemType Directory -Path "static\css\build" -Force | Out-Null
}

# Prüfe ob Quelldateien existieren
if (!(Test-Path "static\css\kiosk-optimized.css")) {
    Write-Host "FEHLER: static\css\kiosk-optimized.css nicht gefunden!" -ForegroundColor Red
    exit 1
}

if (!(Test-Path "static\css\icons-minimal.css")) {
    Write-Host "FEHLER: static\css\icons-minimal.css nicht gefunden!" -ForegroundColor Red
    exit 1
}

if (!(Test-Path "static\css\critical-inline.css")) {
    Write-Host "FEHLER: static\css\critical-inline.css nicht gefunden!" -ForegroundColor Red
    exit 1
}

# Erstelle eine kombinierte CSS-Datei in korrekter Reihenfolge
Write-Host "Kombiniere CSS-Dateien..." -ForegroundColor Yellow

$timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
$header = @"
/* MYP Platform - Kiosk Optimierte CSS Bundle */
/* Generiert am: $timestamp */


"@

# CSS-Dateien in optimaler Reihenfolge kombinieren
Write-Host "Lade kiosk-optimized.css..." -ForegroundColor Gray
$kioskCSS = Get-Content "static\css\kiosk-optimized.css" -Raw -Encoding UTF8

Write-Host "Lade icons-minimal.css..." -ForegroundColor Gray
$iconsCSS = Get-Content "static\css\icons-minimal.css" -Raw -Encoding UTF8

# Kombiniere CSS-Inhalte
$combinedCSS = $header + $kioskCSS + "`r`n`r`n" + $iconsCSS

# TailwindCSS mit aggressivem Purging bauen
Write-Host "Purge TailwindCSS..." -ForegroundColor Yellow
try {
    $process = Start-Process "npx" -ArgumentList "tailwindcss", "-i", "static\css\input.css", "-o", "static\css\build\tailwind-purged.css", "--minify" -Wait -PassThru -NoNewWindow
    if ($process.ExitCode -eq 0) {
        Write-Host "TailwindCSS erfolgreich gebaut" -ForegroundColor Green
        $tailwindCSS = Get-Content "static\css\build\tailwind-purged.css" -Raw -Encoding UTF8
        $combinedCSS += "`r`n`r`n" + $tailwindCSS
    } else {
        Write-Host "TailwindCSS Build fehlgeschlagen, verwende ohne Tailwind" -ForegroundColor Yellow
    }
} catch {
    Write-Host "TailwindCSS Build fehlgeschlagen: $($_.Exception.Message)" -ForegroundColor Yellow
}

# Kombinierte CSS speichern
Write-Host "Speichere kombinierte CSS..." -ForegroundColor Gray
$combinedCSS | Out-File -FilePath "static\css\build\kiosk-combined.css" -Encoding UTF8

# CSS minifizieren (falls cssnano verfügbar)
Write-Host "Minifiziere CSS..." -ForegroundColor Yellow
try {
    $process = Start-Process "npx" -ArgumentList "cssnano", "static\css\build\kiosk-combined.css", "static\css\build\kiosk-production.css", "--no-map" -Wait -PassThru -NoNewWindow
    if ($process.ExitCode -eq 0) {
        Write-Host "CSS erfolgreich minifiziert" -ForegroundColor Green
    } else {
        Write-Host "cssnano fehlgeschlagen, verwende unminifizierte Version" -ForegroundColor Yellow
        Copy-Item "static\css\build\kiosk-combined.css" "static\css\build\kiosk-production.css"
    }
} catch {
    Write-Host "cssnano nicht verfügbar, verwende unminifizierte Version" -ForegroundColor Yellow
    Copy-Item "static\css\build\kiosk-combined.css" "static\css\build\kiosk-production.css"
}

# Erstelle kritisches CSS für Inline-Verwendung
Write-Host "Erstelle kritisches CSS..." -ForegroundColor Yellow
Copy-Item "static\css\critical-inline.css" "static\css\build\critical.css"

# Erstelle eine Version ohne FontAwesome
Write-Host "Entferne FontAwesome-Abhängigkeiten..." -ForegroundColor Yellow
if (Test-Path "static\css\build\kiosk-production.css") {
    $content = Get-Content "static\css\build\kiosk-production.css" | Where-Object { $_ -notmatch "fontawesome" }
    $content | Out-File -FilePath "static\css\build\kiosk-no-fa.css" -Encoding UTF8
}

# Dateigröße-Analyse
Write-Host ""
Write-Host "Dateigröße-Analyse:" -ForegroundColor Cyan

if (Test-Path "static\css\build\critical.css") {
    $criticalSize = (Get-Item "static\css\build\critical.css").Length
    Write-Host "Critical CSS (inline): $criticalSize bytes"
}

if (Test-Path "static\css\build\kiosk-production.css") {
    $kioskSize = (Get-Item "static\css\build\kiosk-production.css").Length
    Write-Host "Kiosk Production CSS: $kioskSize bytes"
}

if (Test-Path "static\css\build\kiosk-no-fa.css") {
    $noFaSize = (Get-Item "static\css\build\kiosk-no-fa.css").Length
    Write-Host "Ohne FontAwesome: $noFaSize bytes"
}

# Vergleich mit Original-Dateien
if ((Test-Path "static\css\tailwind.min.css") -and (Test-Path "static\css\build\kiosk-production.css")) {
    $originalSize = (Get-Item "static\css\tailwind.min.css").Length
    $optimizedSize = (Get-Item "static\css\build\kiosk-production.css").Length
    if ($originalSize -gt 0) {
        $reduction = [math]::Round((1 - ($optimizedSize / $originalSize)) * 100, 1)
        Write-Host "TailwindCSS Original: $originalSize bytes"
        Write-Host "Größenreduktion: $reduction%" -ForegroundColor Green
    }
}

# Cache-Busting Hash generieren
if (Test-Path "static\css\build\kiosk-production.css") {
    $hash = (Get-FileHash "static\css\build\kiosk-production.css" -Algorithm SHA256).Hash.Substring(0, 8).ToLower()
    Copy-Item "static\css\build\kiosk-production.css" "static\css\build\kiosk-$hash.css"
    
    Write-Host ""
    Write-Host "Build abgeschlossen!" -ForegroundColor Green
    Write-Host ""
    Write-Host "Generierte Dateien:" -ForegroundColor Cyan
    Write-Host "   • static\css\build\critical.css (inline verwenden)"
    Write-Host "   • static\css\build\kiosk-production.css (Haupt-CSS)"
    Write-Host "   • static\css\build\kiosk-$hash.css (mit Cache-Busting)"
    Write-Host ""
    Write-Host "HTML-Integration:" -ForegroundColor Cyan
    Write-Host '   <style>/* Inhalt von critical.css hier einfügen */</style>'
    Write-Host '   <link rel="stylesheet" href="/static/css/build/kiosk-production.css">'
    Write-Host ""
    Write-Host "Für maximale Performance: Service Worker entfernen und nur statische CSS verwenden" -ForegroundColor Blue
}

# Cleanup temporärer Dateien
if (Test-Path "static\css\build\kiosk-combined.css") {
    Remove-Item "static\css\build\kiosk-combined.css"
}
if (Test-Path "static\css\build\tailwind-purged.css") {
    Remove-Item "static\css\build\tailwind-purged.css"
}

Write-Host "Cleanup abgeschlossen" -ForegroundColor Green