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

namespace App\Front\Controllers;

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

class SearchController
{
    public function index()
    {
        $query = $_GET['q'] ?? '';
        $category = $_GET['category'] ?? '';
        $sort = $_GET['sort'] ?? 'name';
        $order = $_GET['order'] ?? 'asc';
        $minPrice = $_GET['min_price'] ?? '';
        $maxPrice = $_GET['max_price'] ?? '';
        $page = max(1, intval($_GET['page'] ?? 1));
        $perPage = 12;

        // 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);
            
            // Suchbedingungen aufbauen
            $whereConditions = ['p.active = 1'];
            $params = [];
            
            if (!empty($query)) {
                $whereConditions[] = '(p.name LIKE ? OR p.description LIKE ?)';
                $params[] = '%' . $query . '%';
                $params[] = '%' . $query . '%';
            }
            
            if (!empty($category)) {
                $whereConditions[] = 'p.category_id = ?';
                $params[] = $category;
            }
            
            if (!empty($minPrice)) {
                $whereConditions[] = 'p.price >= ?';
                $params[] = $minPrice;
            }
            
            if (!empty($maxPrice)) {
                $whereConditions[] = 'p.price <= ?';
                $params[] = $maxPrice;
            }
            
            $whereClause = implode(' AND ', $whereConditions);
            
            // Gesamtanzahl für Pagination
            $countSql = "
                SELECT COUNT(*) as total
                FROM ws_product p 
                LEFT JOIN ws_category c ON p.category_id = c.id
                WHERE $whereClause
            ";
            
            $stmt = $conn->prepare($countSql);
            $stmt->execute($params);
            $totalCount = $stmt->fetchAssociative()['total'];
            
            // Produkte laden
            $offset = ($page - 1) * $perPage;
            $sql = "
                SELECT p.*, c.name as category_name
                FROM ws_product p 
                LEFT JOIN ws_category c ON p.category_id = c.id
                WHERE $whereClause
                ORDER BY p.$sort $order
                LIMIT $perPage OFFSET $offset
            ";
            
            $stmt = $conn->prepare($sql);
            $stmt->execute($params);
            
            $products = [];
            while ($row = $stmt->fetchAssociative()) {
                $products[] = $row;
            }
            
            // Kategorien für Filter laden
            $stmt = $conn->prepare('SELECT id, name FROM ws_category WHERE active = 1 ORDER BY name');
            $stmt->execute();
            
            $categories = [];
            while ($row = $stmt->fetchAssociative()) {
                $categories[] = $row;
            }
            
            // Pagination berechnen
            $totalPages = ceil($totalCount / $perPage);
            $pagination = [
                'current' => $page,
                'total' => $totalPages,
                'per_page' => $perPage,
                'total_count' => $totalCount
            ];
            
            $this->render('front/search/index.html.twig', [
                'title' => 'Webshop - Suche',
                'query' => $query,
                'products' => $products,
                'categories' => $categories,
                'pagination' => $pagination,
                'filters' => [
                    'category' => $category,
                    'sort' => $sort,
                    'order' => $order,
                    'min_price' => $minPrice,
                    'max_price' => $maxPrice
                ]
            ]);
            
        } catch (Exception $e) {
            $this->render('front/search/index.html.twig', [
                'title' => 'Webshop - Suche',
                'query' => $query,
                'products' => [],
                'categories' => [],
                'pagination' => ['current' => 1, 'total' => 1, 'per_page' => 12, 'total_count' => 0],
                'filters' => [],
                'error' => 'Datenbankfehler: ' . $e->getMessage()
            ]);
        }
    }

    public function ajax()
    {
        // AJAX-Suche für Live-Suggestions
        $query = $_GET['q'] ?? '';
        
        if (empty($query) || strlen($query) < 2) {
            header('Content-Type: application/json');
            echo json_encode(['products' => []]);
            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);
            
            $sql = "
                SELECT p.id, p.name, p.price, p.image, c.name as category_name
                FROM ws_product p 
                LEFT JOIN ws_category c ON p.category_id = c.id
                WHERE p.active = 1 AND (p.name LIKE ? OR p.description LIKE ?)
                ORDER BY p.name ASC
                LIMIT 5
            ";
            
            $stmt = $conn->prepare($sql);
            $stmt->execute(['%' . $query . '%', '%' . $query . '%']);
            
            $products = [];
            while ($row = $stmt->fetchAssociative()) {
                $products[] = $row;
            }
            
            header('Content-Type: application/json');
            echo json_encode(['products' => $products]);
            
        } catch (Exception $e) {
            header('Content-Type: application/json');
            echo json_encode(['products' => [], 'error' => $e->getMessage()]);
        }
    }

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