<?php
/**
 * Copyright seit 2024 Webshop System
 *
 * Frontend-Produktdetail-Controller für das Webshop-System
 *
 * @author    Webshop System
 * @license   GPL v3
 */

namespace App\Front\Controllers;

use Doctrine\DBAL\DriverManager;
use Doctrine\DBAL\Exception;

class ProductController
{
    public function show($id)
    {
        // DB-Verbindung herstellen
        $connectionParams = [
            'dbname' => getenv('DB_DATABASE') ?: 'freeshop',
            'user' => getenv('DB_USERNAME') ?: 'freeshop_user',
            'password' => getenv('DB_PASSWORD') ?: 'freeshop_password',
            'host' => getenv('DB_HOST') ?: 'db',
            'driver' => 'pdo_mysql',
            'port' => getenv('DB_PORT') ?: 3306,
            'charset' => 'utf8mb4',
        ];

        try {
            $conn = DriverManager::getConnection($connectionParams);
            
            // Produkt mit Kategorie laden
            $stmt = $conn->prepare('
                SELECT p.*, c.name as category_name, c.id as category_id
                FROM ws_product p 
                LEFT JOIN ws_category c ON p.category_id = c.id
                WHERE p.id = ? AND p.active = 1
            ');
            $stmt->execute([$id]);
            $product = $stmt->fetchAssociative();
            
            if (!$product) {
                $this->render('front/error/404.html.twig', [
                    'title' => 'Webshop - Produkt nicht gefunden',
                    'message' => 'Das angeforderte Produkt wurde nicht gefunden.'
                ]);
                return;
            }
            
            // Bewertungen laden
            $stmt = $conn->prepare('
                SELECT r.*, c.first_name, c.last_name
                FROM ws_review r
                LEFT JOIN ws_customer c ON r.customer_id = c.id
                WHERE r.product_id = ? AND r.active = 1
                ORDER BY r.created_at DESC
            ');
            $stmt->execute([$id]);
            $reviews = $stmt->fetchAllAssociative();
            
            // Durchschnittsbewertung berechnen
            $stmt = $conn->prepare('
                SELECT AVG(rating) as avg_rating, COUNT(*) as total_reviews
                FROM ws_review 
                WHERE product_id = ? AND active = 1
            ');
            $stmt->execute([$id]);
            $ratingStats = $stmt->fetchAssociative();
            
            // Verwandte Produkte laden (gleiche Kategorie)
            $stmt = $conn->prepare('
                SELECT p.*, c.name as category_name
                FROM ws_product p 
                LEFT JOIN ws_category c ON p.category_id = c.id
                WHERE p.category_id = ? AND p.id != ? AND p.active = 1
                ORDER BY RAND()
                LIMIT 4
            ');
            $stmt->execute([$product['category_id'], $id]);
            $relatedProducts = $stmt->fetchAllAssociative();
            
            // Produktbilder laden
            $stmt = $conn->prepare('
                SELECT * FROM ws_product_image 
                WHERE product_id = ? 
                ORDER BY sort_order ASC
            ');
            $stmt->execute([$id]);
            $productImages = $stmt->fetchAllAssociative();
            
            // Produktvarianten laden (falls vorhanden)
            $stmt = $conn->prepare('
                SELECT * FROM ws_product_variant 
                WHERE product_id = ? AND active = 1
                ORDER BY sort_order ASC
            ');
            $stmt->execute([$id]);
            $productVariants = $stmt->fetchAllAssociative();
            
            $this->render('front/product/show.html.twig', [
                'title' => 'Webshop - ' . $product['name'],
                'product' => $product,
                'reviews' => $reviews,
                'ratingStats' => $ratingStats,
                'relatedProducts' => $relatedProducts,
                'productImages' => $productImages,
                'productVariants' => $productVariants
            ]);
            
        } catch (Exception $e) {
            $this->render('front/error/500.html.twig', [
                'title' => 'Webshop - Fehler',
                'message' => 'Ein Fehler ist aufgetreten: ' . $e->getMessage()
            ]);
        }
    }
    
    public function addReview()
    {
        if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
            header('Location: /');
            return;
        }
        
        $productId = $_POST['product_id'] ?? null;
        $rating = $_POST['rating'] ?? null;
        $comment = $_POST['comment'] ?? '';
        $customerId = $_SESSION['customer_id'] ?? null;
        
        if (!$productId || !$rating || !$customerId) {
            header('Content-Type: application/json');
            echo json_encode(['success' => false, 'message' => 'Ungültige Daten']);
            return;
        }
        
        $connectionParams = [
            'dbname' => getenv('DB_DATABASE') ?: 'freeshop',
            'user' => getenv('DB_USERNAME') ?: 'freeshop_user',
            'password' => getenv('DB_PASSWORD') ?: 'freeshop_password',
            'host' => getenv('DB_HOST') ?: 'db',
            'driver' => 'pdo_mysql',
            'port' => getenv('DB_PORT') ?: 3306,
            'charset' => 'utf8mb4',
        ];

        try {
            $conn = DriverManager::getConnection($connectionParams);
            
            // Prüfen ob bereits eine Bewertung existiert
            $stmt = $conn->prepare('
                SELECT id FROM ws_review 
                WHERE product_id = ? AND customer_id = ?
            ');
            $stmt->execute([$productId, $customerId]);
            $existingReview = $stmt->fetchAssociative();
            
            if ($existingReview) {
                // Bewertung aktualisieren
                $stmt = $conn->prepare('
                    UPDATE ws_review 
                    SET rating = ?, comment = ?, updated_at = NOW()
                    WHERE id = ?
                ');
                $stmt->execute([$rating, $comment, $existingReview['id']]);
            } else {
                // Neue Bewertung erstellen
                $stmt = $conn->prepare('
                    INSERT INTO ws_review (product_id, customer_id, rating, comment, active, created_at)
                    VALUES (?, ?, ?, ?, 1, NOW())
                ');
                $stmt->execute([$productId, $customerId, $rating, $comment]);
            }
            
            header('Content-Type: application/json');
            echo json_encode(['success' => true, 'message' => 'Bewertung erfolgreich gespeichert']);
            
        } catch (Exception $e) {
            header('Content-Type: application/json');
            echo json_encode(['success' => false, 'message' => 'Fehler: ' . $e->getMessage()]);
        }
    }
    
    public function addToWishlist()
    {
        if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
            header('Content-Type: application/json');
            echo json_encode(['success' => false, 'message' => 'Ungültige Anfrage']);
            return;
        }
        
        $productId = $_POST['product_id'] ?? null;
        $customerId = $_SESSION['customer_id'] ?? null;
        
        if (!$productId || !$customerId) {
            header('Content-Type: application/json');
            echo json_encode(['success' => false, 'message' => 'Nicht angemeldet']);
            return;
        }
        
        $connectionParams = [
            'dbname' => getenv('DB_DATABASE') ?: 'freeshop',
            'user' => getenv('DB_USERNAME') ?: 'freeshop_user',
            'password' => getenv('DB_PASSWORD') ?: 'freeshop_password',
            'host' => getenv('DB_HOST') ?: 'db',
            'driver' => 'pdo_mysql',
            'port' => getenv('DB_PORT') ?: 3306,
            'charset' => 'utf8mb4',
        ];

        try {
            $conn = DriverManager::getConnection($connectionParams);
            
            // Prüfen ob bereits in Wunschliste
            $stmt = $conn->prepare('
                SELECT id FROM ws_wishlist 
                WHERE product_id = ? AND customer_id = ?
            ');
            $stmt->execute([$productId, $customerId]);
            $existing = $stmt->fetchAssociative();
            
            if ($existing) {
                // Aus Wunschliste entfernen
                $stmt = $conn->prepare('DELETE FROM ws_wishlist WHERE id = ?');
                $stmt->execute([$existing['id']]);
                $message = 'Aus Wunschliste entfernt';
                $inWishlist = false;
            } else {
                // Zur Wunschliste hinzufügen
                $stmt = $conn->prepare('
                    INSERT INTO ws_wishlist (product_id, customer_id, created_at)
                    VALUES (?, ?, NOW())
                ');
                $stmt->execute([$productId, $customerId]);
                $message = 'Zur Wunschliste hinzugefügt';
                $inWishlist = true;
            }
            
            header('Content-Type: application/json');
            echo json_encode([
                'success' => true, 
                'message' => $message,
                'in_wishlist' => $inWishlist
            ]);
            
        } catch (Exception $e) {
            header('Content-Type: application/json');
            echo json_encode(['success' => false, 'message' => 'Fehler: ' . $e->getMessage()]);
        }
    }
    
    public function quickView()
    {
        $productId = $_GET['id'] ?? null;
        
        if (!$productId) {
            header('Content-Type: application/json');
            echo json_encode(['success' => false, 'message' => 'Produkt-ID fehlt']);
            return;
        }
        
        $connectionParams = [
            'dbname' => getenv('DB_DATABASE') ?: 'freeshop',
            'user' => getenv('DB_USERNAME') ?: 'freeshop_user',
            'password' => getenv('DB_PASSWORD') ?: 'freeshop_password',
            'host' => getenv('DB_HOST') ?: 'db',
            'driver' => 'pdo_mysql',
            'port' => getenv('DB_PORT') ?: 3306,
            'charset' => 'utf8mb4',
        ];

        try {
            $conn = DriverManager::getConnection($connectionParams);
            
            $stmt = $conn->prepare('
                SELECT p.*, c.name as category_name
                FROM ws_product p 
                LEFT JOIN ws_category c ON p.category_id = c.id
                WHERE p.id = ? AND p.active = 1
            ');
            $stmt->execute([$productId]);
            $product = $stmt->fetchAssociative();
            
            if (!$product) {
                header('Content-Type: application/json');
                echo json_encode(['success' => false, 'message' => 'Produkt nicht gefunden']);
                return;
            }
            
            // Quick View HTML generieren
            $html = $this->generateQuickViewHtml($product);
            
            header('Content-Type: application/json');
            echo json_encode([
                'success' => true,
                'html' => $html
            ]);
            
        } catch (Exception $e) {
            header('Content-Type: application/json');
            echo json_encode(['success' => false, 'message' => 'Fehler: ' . $e->getMessage()]);
        }
    }
    
    private function generateQuickViewHtml($product)
    {
        return '
        <div class="modal-header">
            <h5 class="modal-title">' . htmlspecialchars($product['name']) . '</h5>
            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
        </div>
        <div class="modal-body">
            <div class="row">
                <div class="col-md-6">
                    <img src="' . htmlspecialchars($product['image']) . '" 
                         class="img-fluid" 
                         alt="' . htmlspecialchars($product['name']) . '">
                </div>
                <div class="col-md-6">
                    <h6>' . htmlspecialchars($product['name']) . '</h6>
                    <p class="text-muted">' . htmlspecialchars($product['category_name']) . '</p>
                    <p>' . htmlspecialchars(substr($product['description'], 0, 200)) . '...</p>
                    <h5 class="text-success">€' . number_format($product['price'], 2, ',', '.') . '</h5>
                    <button class="btn btn-primary add-to-cart-quick" 
                            data-product-id="' . $product['id'] . '">
                        <i class="fas fa-cart-plus me-2"></i>Zum Warenkorb
                    </button>
                </div>
            </div>
        </div>';
    }

    protected function render($template, $data = [])
    {
        // Einfache Template-Engine (später durch Twig ersetzen)
        extract($data);
        include __DIR__ . '/../../templates/' . $template;
    }
}