<?php

namespace App\Http\Controllers;

use App\Models\Package;
use App\Models\Tenant;
use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Mail;
use Illuminate\Support\Facades\Validator;
use Illuminate\Validation\Rules\Password;
use Inertia\Inertia;
use Illuminate\Support\Str;
use Stripe\PaymentIntent;
use Stripe\Stripe;

class CheckoutController extends Controller
{
    public function show(Package $package)
    {
        // Alle verfügbaren Pakete laden
        $packages = Package::all();

        return Inertia::render('marketing/CheckoutWizardPage', [
            'package' => $package,
            'packageOptions' => $packages,
            'stripePublishableKey' => config('services.stripe.key'),
            'privacyHtml' => view('legal.datenschutz-partial')->render(),
            'auth' => [
                'user' => Auth::user(),
            ],
        ]);
    }

    public function register(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'email' => 'required|email|unique:users,email',
            'password' => ['required', 'confirmed', Password::defaults()],
            'package_id' => 'required|exists:packages,id',
            'terms' => 'required|accepted',
        ]);

        if ($validator->fails()) {
            return response()->json([
                'errors' => $validator->errors(),
            ], 422);
        }

        $package = Package::findOrFail($request->package_id);
        $validated = $validator->validated();
        DB::transaction(function () use ($request, $package, $validated) {
            
            // User erstellen
            $user = User::create([
                'email' => $request->email,
                'password' => Hash::make($request->password),
                'pending_purchase' => true,
            ]);

            // Tenant erstellen
            $tenant = Tenant::create([
            'user_id' => $user->id,
            'name' => $validated['first_name'] . ' ' . $validated['last_name'],
            'slug' => Str::slug($validated['first_name'] . ' ' . $validated['last_name'] . '-' . now()->timestamp),
            'email' => $validated['email'],
            'is_active' => true,
            'is_suspended' => false,
            'event_credits_balance' => 0,
            'subscription_tier' => 'free',
            'subscription_expires_at' => null,
            'settings' => json_encode([
                'branding' => [
                    'logo_url' => null,
                    'primary_color' => '#3B82F6',
                    'secondary_color' => '#1F2937',
                    'font_family' => 'Inter, sans-serif',
                ],
                'features' => [
                    'photo_likes_enabled' => false,
                    'event_checklist' => false,
                    'custom_domain' => false,
                    'advanced_analytics' => false,
                ],
                'custom_domain' => null,
                'contact_email' => $validated['email'],
                'event_default_type' => 'general',
            ]),
        ]);
            // Package zuweisen
            $tenant->packages()->attach($package->id, [
                'purchased_at' => now(),
                'expires_at' => $package->is_free ? null : now()->addYear(),
                'is_active' => $package->is_free, // Kostenlose Pakete sofort aktivieren
            ]);

            // E-Mail-Verifizierung senden
            $user->sendEmailVerificationNotification();

            // Willkommens-E-Mail senden
            Mail::to($user->email)->send(new \App\Mail\WelcomeMail($user, $package));
        });

        return response()->json([
            'message' => 'Registrierung erfolgreich. Bitte überprüfen Sie Ihre E-Mail zur Verifizierung.',
        ]);
    }

    public function createPaymentIntent(Request $request)
    {
        $request->validate([
            'package_id' => 'required|exists:packages,id',
        ]);

        $package = Package::findOrFail($request->package_id);

        \Log::info('Create Payment Intent', [
            'package_id' => $package->id,
            'package_name' => $package->name,
            'price' => $package->price,
            'is_free' => $package->is_free,
            'user_id' => Auth::id(),
        ]);

        if ($package->is_free) {
            \Log::info('Free package detected, returning null client_secret');
            return response()->json([
                'client_secret' => null,
                'free_package' => true,
            ]);
        }

        // Stripe API Key setzen
        Stripe::setApiKey(config('services.stripe.secret'));

        try {
            $paymentIntent = PaymentIntent::create([
                'amount' => $package->price * 100, // Stripe erwartet Cent
                'currency' => 'eur',
                'metadata' => [
                    'package_id' => $package->id,
                    'user_id' => Auth::id(),
                ],
            ]);

            \Log::info('PaymentIntent created successfully', [
                'payment_intent_id' => $paymentIntent->id,
                'client_secret' => substr($paymentIntent->client_secret, 0, 50) . '...',
            ]);

            return response()->json([
                'client_secret' => $paymentIntent->client_secret,
            ]);
        } catch (\Exception $e) {
            \Log::error('Stripe PaymentIntent creation failed', [
                'error' => $e->getMessage(),
                'package_id' => $package->id,
            ]);

            return response()->json([
                'error' => 'Fehler beim Erstellen der Zahlungsdaten: ' . $e->getMessage(),
            ], 500);
        }
    }

    public function confirmPayment(Request $request)
    {
        $request->validate([
            'payment_intent_id' => 'required|string',
            'package_id' => 'required|exists:packages,id',
        ]);

        // Stripe API Key setzen
        Stripe::setApiKey(config('services.stripe.secret'));

        $paymentIntent = PaymentIntent::retrieve($request->payment_intent_id);

        if ($paymentIntent->status !== 'succeeded') {
            return response()->json([
                'error' => 'Zahlung nicht erfolgreich.',
            ], 400);
        }

        $package = Package::findOrFail($request->package_id);
        $user = Auth::user();

        // Package dem Tenant zuweisen
        $user->tenant->packages()->attach($package->id, [
            'purchased_at' => now(),
            'expires_at' => now()->addYear(),
            'is_active' => true,
        ]);

        // pending_purchase zurücksetzen
        $user->update(['pending_purchase' => false]);

        return response()->json([
            'message' => 'Zahlung erfolgreich bestätigt.',
        ]);
    }
}