#
# LibreBooking n8n Node - Installations-Skript für Windows (PowerShell)
#
# Verwendung:
#   .\install.ps1
#
# Optionen:
#   -NoLink       Überspringt npm link (nur Build)
#   -Global       Installiert global statt npm link
#   -Help         Zeigt diese Hilfe an
#

param(
    [switch]$NoLink,
    [switch]$Global,
    [switch]$Help
)

# Konfiguration
$MIN_NODE_VERSION = 18
$ErrorActionPreference = "Stop"

# Funktionen
function Write-ColorOutput {
    param(
        [string]$Message,
        [string]$Color = "White"
    )
    Write-Host $Message -ForegroundColor $Color
}

function Write-Header {
    Write-ColorOutput "" "Blue"
    Write-ColorOutput "=============================================" "Blue"
    Write-ColorOutput "  LibreBooking n8n Node Installer" "Blue"
    Write-ColorOutput "=============================================" "Blue"
    Write-ColorOutput "" "Blue"
}

function Write-Success {
    param([string]$Message)
    Write-ColorOutput "✓ $Message" "Green"
}

function Write-Warning-Msg {
    param([string]$Message)
    Write-ColorOutput "⚠ $Message" "Yellow"
}

function Write-Error-Msg {
    param([string]$Message)
    Write-ColorOutput "✗ $Message" "Red"
}

function Write-Info {
    param([string]$Message)
    Write-ColorOutput "ℹ $Message" "Cyan"
}

function Show-Help {
    Write-Host "Verwendung: .\install.ps1 [OPTIONEN]"
    Write-Host ""
    Write-Host "Optionen:"
    Write-Host "  -NoLink       Überspringt npm link (nur Build)"
    Write-Host "  -Global       Installiert global mit npm install -g"
    Write-Host "  -Help         Zeigt diese Hilfe an"
    Write-Host ""
    Write-Host "Beispiele:"
    Write-Host "  .\install.ps1              # Standard-Installation mit npm link"
    Write-Host "  .\install.ps1 -NoLink      # Nur Dependencies installieren und Build"
    Write-Host "  .\install.ps1 -Global      # Globale Installation"
    exit 0
}

function Test-Command {
    param([string]$Command)
    try {
        $null = Get-Command $Command -ErrorAction Stop
        return $true
    }
    catch {
        return $false
    }
}

function Get-NodeVersion {
    $version = (node -v) -replace 'v', ''
    return [int]($version.Split('.')[0])
}

# Hilfe anzeigen
if ($Help) {
    Show-Help
}

# Start
Write-Header

# 1. Node.js prüfen
Write-Host ""
Write-Info "Prüfe Voraussetzungen..."
Write-Host ""

if (-not (Test-Command "node")) {
    Write-Error-Msg "Node.js ist nicht installiert!"
    Write-Host "  Bitte installiere Node.js v$MIN_NODE_VERSION oder höher:"
    Write-Host "  https://nodejs.org/"
    exit 1
}

$nodeVersion = Get-NodeVersion
if ($nodeVersion -lt $MIN_NODE_VERSION) {
    Write-Error-Msg "Node.js Version $nodeVersion ist zu alt!"
    Write-Host "  Mindestens Version $MIN_NODE_VERSION benötigt."
    exit 1
}

$nodeFullVersion = (node -v) -replace 'v', ''
Write-Success "Node.js v$nodeFullVersion gefunden"

# 2. npm prüfen
if (-not (Test-Command "npm")) {
    Write-Error-Msg "npm ist nicht installiert!"
    exit 1
}

$npmVersion = npm -v
Write-Success "npm v$npmVersion gefunden"

# 3. n8n prüfen (optional)
if (Test-Command "n8n") {
    try {
        $n8nVersion = n8n --version 2>$null
        Write-Success "n8n $n8nVersion gefunden"
    }
    catch {
        Write-Success "n8n installiert"
    }
}
else {
    Write-Warning-Msg "n8n ist nicht global installiert."
    Write-Host "  Für npm link muss n8n global installiert sein:"
    Write-Host "  npm install -g n8n"
    Write-Host ""
    
    if (-not $NoLink -and -not $Global) {
        $response = Read-Host "Möchtest du trotzdem fortfahren? (j/N)"
        if ($response -notmatch '^[Jj]$') {
            exit 1
        }
    }
}

# 4. Dependencies installieren
Write-Host ""
Write-Info "Installiere Dependencies..."

try {
    npm install
    Write-Success "Dependencies installiert"
}
catch {
    Write-Error-Msg "Fehler bei npm install: $_"
    exit 1
}

# 5. TypeScript kompilieren
Write-Host ""
Write-Info "Kompiliere TypeScript..."

try {
    npm run build
    Write-Success "Build erfolgreich"
}
catch {
    Write-Error-Msg "Fehler beim Build: $_"
    exit 1
}

# 6. npm link oder global install
if ($Global) {
    Write-Host ""
    Write-Info "Installiere global..."
    
    try {
        npm install -g .
        Write-Success "Global installiert"
    }
    catch {
        Write-Error-Msg "Fehler bei globaler Installation: $_"
        exit 1
    }
}
elseif (-not $NoLink) {
    Write-Host ""
    Write-Info "Verlinke mit npm link..."
    
    try {
        npm link
        Write-Success "npm link erfolgreich"
        
        # Versuche mit n8n zu verlinken
        if (Test-Command "n8n") {
            $n8nPath = Join-Path (npm root -g) "n8n"
            if (Test-Path $n8nPath) {
                Write-Info "Verlinke mit n8n..."
                Push-Location $n8nPath
                try {
                    npm link n8n-nodes-librebooking 2>$null
                    Write-Success "Mit n8n verlinkt"
                }
                catch {
                    Write-Warning-Msg "Konnte nicht automatisch mit n8n verlinken"
                }
                finally {
                    Pop-Location
                }
            }
        }
    }
    catch {
        Write-Error-Msg "Fehler bei npm link: $_"
        exit 1
    }
}

# Abschluss
Write-Host ""
Write-ColorOutput "=============================================" "Green"
Write-ColorOutput "  Installation erfolgreich abgeschlossen!" "Green"
Write-ColorOutput "=============================================" "Green"
Write-Host ""
Write-Host "Nächste Schritte:"
Write-Host ""

if ($NoLink) {
    Write-Host "  1. Führe 'npm link' aus, um den Node zu verlinken"
    Write-Host "  2. Starte n8n neu: n8n start"
}
else {
    Write-Host "  1. Starte n8n neu: n8n start"
    Write-Host "     (oder mit Docker: docker-compose restart)"
}

Write-Host ""
Write-Host "  2. Öffne n8n im Browser: http://localhost:5678"
Write-Host "  3. Der LibreBooking Node sollte verfügbar sein"
Write-Host ""
Write-Host "Bei Problemen siehe INSTALLATION.md oder README.md"
Write-Host ""