<?php
// Αρχείο: /var/www/html/hockey-cms/cart.php
if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

require_once __DIR__ . '/vendor/autoload.php';
require_once __DIR__ . '/config/database.php';
require_once __DIR__ . '/config/functions.php';
// --- Μηχανισμός Αλλαγής Γλώσσας ---
if (isset($_GET['lang']) && in_array($_GET['lang'], ['el', 'en'])) {
    $_SESSION['lang'] =$_GET['lang'];
}
$current_lang =$_SESSION['lang'] ?? 'el';

// Αρχικοποίηση καλαθιού αν δεν υπάρχει
if (!isset($_SESSION['cart'])) {$_SESSION['cart'] = [];
}

// Χειρισμός Ενεργειών (Προσθήκη, Διαγραφή)
$action = isset($_GET['action']) ?$_GET['action'] : '';

if ($action === 'add') {$product_id = isset($_POST['product_id']) ? (int)$_POST['product_id'] : 0;
    $qty = isset($_POST['quantity']) ? (int)$_POST['quantity'] : 1;
    if ($product_id > 0) {
        if (isset($_SESSION['cart'][$product_id])) {$_SESSION['cart'][$product_id] +=$qty;
        } else {
            $_SESSION['cart'][$product_id] =$qty;
        }
    }
    header("Location: cart.php");
    exit;
}

if ($action === 'remove') {$product_id = isset($_GET['id']) ? (int)$_GET['id'] : 0;
    if (isset($_SESSION['cart'][$product_id])) {
        unset($_SESSION['cart'][$product_id]);
    }
    header("Location: cart.php");
    exit;
}

// Δυναμική ανάγνωση ενεργού theme
$active_theme = 'default';
try {
    $stmt =$pdo->query("SELECT value FROM settings WHERE `key` = 'active_theme'");
    $res =$stmt->fetchColumn();
    if ($res) { $active_theme =$res; }
} catch (Exception $e) {}

$theme_dir = __DIR__ . '/themes/' .$active_theme;
if (!is_dir($theme_dir)) {
    $active_theme = 'default';$theme_dir = __DIR__ . '/themes/default';
}

$loader = new \Twig\Loader\FilesystemLoader($theme_dir);
$twig = new \Twig\Environment($loader, ['cache' => false]);
$twig->addGlobal('session',$_SESSION);
$twig->addGlobal('current_lang',$current_lang);

// Διόρθωση: Ανάγνωση κατηγοριών με τα δίγλωσσα πεδία (name_el / name_en)
try {
    $categoriesRaw =$pdo->query("SELECT * FROM categories ORDER BY sort_order ASC, name_el ASC")->fetchAll(PDO::FETCH_ASSOC);
    $categories = [];
    foreach ($categoriesRaw as $cat) {$cat['name'] = ($current_lang === 'en' && !empty($cat['name_en'])) ? $cat['name_en'] :$cat['name_el'];
        $categories[] =$cat;
    }
} catch (Exception $e) {$categories = [];
}

// Φέρνουμε τα στοιχεία των προϊόντων που βρίσκονται στο καλάθι από τη βάση
$cart_items = [];$total_price = 0;

if (!empty($_SESSION['cart'])) {
    $ids = array_keys($_SESSION['cart']);
    $placeholders = implode(',', array_fill(0, count($ids), '?'));
    
    $stmt =$pdo->prepare("
        SELECT p.id, p.title, p.price, pi.image_path 
        FROM products p 
        LEFT JOIN product_images pi ON (p.id = pi.product_id AND pi.is_primary = 1)
        WHERE p.id IN ($placeholders)
    ");
    $stmt->execute($ids);
    $products_in_db =$stmt->fetchAll(PDO::FETCH_ASSOC);

    foreach ($products_in_db as$prod) {
        $prod_id =$prod['id'];
        $qty =$_SESSION['cart'][$prod_id];$subtotal = $prod['price'] *$qty;
        $total_price +=$subtotal;

        $cart_items[] = [
            'id' => $prod_id,
            'title' => $prod['title'],
            'price' => $prod['price'],
            'image_path' => $prod['image_path'],
            'quantity' => $qty,
            'subtotal' => $subtotal
        ];
    }
}

echo $twig->render('cart.html.twig', [
    'site_title' => 'Hockey Gear CMS',
    'categories' => $categories,
    'cart_items' => $cart_items,
    'total_price' => $total_price
]);