<?php

require_once __DIR__ . '/../../config/config.php';
require_once __DIR__ . '/../../db/config.php';

class Product {
    
    /**
     * Get all products with their category names.
     */
    public static function getAll() {
        $pdo = db();
        $stmt = $pdo->query('SELECT p.*, c.name as category_name FROM products p JOIN categories c ON p.category_id = c.id ORDER BY p.created_at DESC');
        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    }

    /**
     * Get a single product by its ID.
     */
    public static function find($id) {
        $pdo = db();
        $stmt = $pdo->prepare('SELECT * FROM products WHERE id = ?');
        $stmt->execute([$id]);
        return $stmt->fetch(PDO::FETCH_ASSOC);
    }

    /**
     * Get a single product by its slug.
     */
    public static function findBySlug($slug) {
        $pdo = db();
        $stmt = $pdo->prepare('SELECT p.*, c.name as category_name FROM products p JOIN categories c ON p.category_id = c.id WHERE p.slug = ? AND p.active = 1');
        $stmt->execute([$slug]);
        return $stmt->fetch(PDO::FETCH_ASSOC);
    }

    /**
     * Create a new product.
     */
    public static function create($data) {
        $pdo = db();
        $sql = "INSERT INTO products (category_id, name, slug, description, price, stock, active, image) VALUES (?, ?, ?, ?, ?, ?, ?, ?)";
        $stmt = $pdo->prepare($sql);
        return $stmt->execute([
            $data['category_id'],
            $data['name'],
            $data['slug'],
            $data['description'],
            $data['price'],
            $data['stock'],
            $data['active'],
            $data['image']
        ]);
    }

    /**
     * Update an existing product.
     */
    public static function update($id, $data) {
        $pdo = db();
        $sql = "UPDATE products SET category_id = ?, name = ?, slug = ?, description = ?, price = ?, stock = ?, active = ?, image = ? WHERE id = ?";
        $stmt = $pdo->prepare($sql);
        
        $params = [
            $data['category_id'],
            $data['name'],
            $data['slug'],
            $data['description'],
            $data['price'],
            $data['stock'],
            $data['active'],
            $data['image'],
            $id
        ];
        
        return $stmt->execute($params);
    }


    /**
     * Delete a product by its ID.
     */
    public static function delete($id) {
        $pdo = db();
        $stmt = $pdo->prepare('DELETE FROM products WHERE id = ?');
        return $stmt->execute([$id]);
    }
    
    /**
     * Get the image filename for a product.
     */
    public static function getProductImage($id) {
        $pdo = db();
        $stmt = $pdo->prepare('SELECT image FROM products WHERE id = ?');
        $stmt->execute([$id]);
        $result = $stmt->fetch(PDO::FETCH_ASSOC);
        return $result ? $result['image'] : null;
    }

    /**
     * Search for products by a given term.
     */
    public static function search($term) {
        $pdo = db();
        $searchTerm = '%' . $term . '%';
        $stmt = $pdo->prepare(
            'SELECT p.*, c.name as category_name 
             FROM products p 
             JOIN categories c ON p.category_id = c.id 
             WHERE (p.name LIKE ? OR p.description LIKE ?) AND p.active = 1 
             ORDER BY p.created_at DESC'
        );
        $stmt->execute([$searchTerm, $searchTerm]);
        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
}