<?php
if (session_status() === PHP_SESSION_NONE) session_start();

require_once dirname(__DIR__) . '/config.php';
require_once dirname(__DIR__) . '/functions.php';
require_admin();

 $categories = $pdo->query("SELECT * FROM categories ORDER BY sort_order")->fetchAll();
 $services   = $pdo->query("SELECT * FROM services")->fetchAll();
 $sizes      = $pdo->query("SELECT * FROM sizes")->fetchAll();

 $error = '';
 $success = '';

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $csrf_valid = true;
    if (function_exists('verify_csrf')) {
        if (!verify_csrf($_POST['csrf_token'] ?? '')) {
            $error = 'خطای امنیتی: توکن نامعتبر است.';
            $csrf_valid = false;
        }
    }

    if ($csrf_valid) {
        $title       = clean($_POST['title'] ?? '');
        $description = clean($_POST['description'] ?? '');
        $category_id = $_POST['category_id'] ? (int)$_POST['category_id'] : null;
        $type        = $_POST['type'] ?? 'print';
        
        // قیمت محصول ساده
        $simple_price = ($type === 'simple') ? (float)($_POST['simple_price'] ?? 0) : 0;
        
        $download_price = ($type === 'download') ? (float)($_POST['download_price'] ?? 0) : 0;
        $pricing_model = $_POST['pricing_model'] ?? 'area_based';
        $size_mode     = $_POST['size_mode'] ?? 'free';
        $locked_size_id = (!empty($_POST['locked_size_id'])) ? (int)$_POST['locked_size_id'] : null;
        $size_constraint_type = $_POST['size_constraint_type'] ?? 'none';
        $max_free_width_cm  = null;
        $max_free_height_cm = null;
        
        // تنظیمات جدید مدل
        $enable_model_selection = isset($_POST['enable_model_selection']) ? 1 : 0;
        $model_selection_mandatory = isset($_POST['model_selection_mandatory']) ? 1 : 0;

        if ($type === 'print' && $size_mode === 'free' && $size_constraint_type !== 'none') {
            if ($size_constraint_type === 'width' || $size_constraint_type === 'both') {
                $max_free_width_cm = (float)($_POST['max_free_width_cm'] ?? 0);
            }
            if ($size_constraint_type === 'height' || $size_constraint_type === 'both') {
                $max_free_height_cm = (float)($_POST['max_free_height_cm'] ?? 0);
            }
        }

        $multi_size_prices = null;
        if ($type === 'print' && $size_mode === 'multi' && !empty($_POST['multi_sizes'])) {
            $tempPrices = [];
            foreach ($_POST['multi_sizes'] as $sid) {
                $pSingle = (float)($_POST['price_single_' . $sid] ?? 0);
                $pDouble = (float)($_POST['price_double_' . $sid] ?? 0);
                $tempPrices[$sid] = ['single' => $pSingle, 'double' => $pDouble];
            }
            $multi_size_prices = json_encode($tempPrices);
        }

        $dpi_mode      = $_POST['dpi_mode'] ?? 'range';
        $min_dpi       = (int)($_POST['min_dpi'] ?? 300);
        $max_dpi       = $dpi_mode === 'range' ? (int)($_POST['max_dpi'] ?? 600) : null;
        $exact_dpi     = $dpi_mode === 'exact' ? (int)$_POST['exact_dpi'] ?? 300 : null;
        $require_cmyk  = isset($_POST['require_cmyk']) ? 1 : 0;
        $production_days = (int)($_POST['production_days'] ?? 7);
        $max_file_size_mb = (int)($_POST['max_file_size_mb'] ?? 10);
        $status        = isset($_POST['status']) ? 1 : 0;
        $allow_upload  = isset($_POST['allow_upload']) ? 1 : 0;
        $is_four_file_mode = isset($_POST['is_four_file_mode']) ? 1 : 0;
        $enable_design_service = isset($_POST['enable_design_service']) ? 1 : 0;
        $max_design_ref_size_mb = (int)($_POST['max_design_ref_size_mb'] ?? 5);
        $has_double_side = isset($_POST['has_double_side']) ? 1 : 0;
        $print_sides     = $has_double_side ? 'double' : 'single';

        $single_side_price = $double_side_price = $single_side_price_sqcm = $double_side_price_sqcm = 0;
        
        if ($type === 'simple') {
            $single_side_price = $simple_price;
            $pricing_model = 'fixed';
            $size_mode = 'fixed';
            $allow_upload = 0;
            $print_sides = 'single';
        } elseif ($type === 'print' && $has_double_side) {
            if ($pricing_model === 'fixed') {
                $single_side_price = (float)($_POST['single_side_price'] ?? 0);
                $double_side_price = (float)($_POST['double_side_price'] ?? 0);
            } else {
                $single_side_price_sqcm = (float)($_POST['single_side_price_sqcm'] ?? 0);
                $double_side_price_sqcm = (float)($_POST['double_side_price_sqcm'] ?? 0);
            }
        } elseif ($type === 'print') {
            if ($pricing_model === 'fixed') $single_side_price = (float)($_POST['simple_price'] ?? 0);
            else $single_side_price_sqcm = (float)($_POST['simple_price_sqcm'] ?? 0);
            $double_side_price = $double_side_price_sqcm = 0;
        }

        if (!$title) {
            $error = 'عنوان الزامی است.';
        } elseif (!isset($_FILES['image']) || $_FILES['image']['error'] !== UPLOAD_ERR_OK) {
            $error = 'آپلود تصویر شاخص الزامی است.';
        } elseif ($type === 'download' && $download_price <= 0) {
            $error = 'برای محصول دانلودی قیمت تعیین کنید.';
        } elseif ($type === 'simple' && $simple_price <= 0) {
            $error = 'برای محصول ساده قیمت تعیین کنید.';
        } else {
            $image = upload_file('image', '../uploads/');
            if (!$image) {
                $error = 'خطا در آپلود تصویر.';
            } else {
                $slug = make_slug($title);
                try {
                    $pdo->beginTransaction();
                    
                    $stmt = $pdo->prepare("
                        INSERT INTO products 
                        (title, slug, description, category_id, type, download_price, pricing_model, 
                         price_per_sqcm, single_side_price, double_side_price, 
                         single_side_price_sqcm, double_side_price_sqcm, double_side_multiplier, 
                         size_mode, size_constraint_type, max_free_width_cm, max_free_height_cm, locked_size_id, 
                         allow_user_size, min_dpi, max_dpi, exact_dpi, dpi_mode, 
                         require_cmyk, production_days, status, allow_upload, is_four_file_mode, enable_design_service, 
                         enable_model_selection, model_selection_mandatory,
                         multi_size_prices, print_sides, image, size_tolerance_mm, max_file_size_mb, max_design_ref_size_mb)
                        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
                    ");
                    
                    $stmt->execute([
                        $title,
                        $slug,
                        $description,
                        $category_id,
                        $type,
                        $download_price,
                        $pricing_model,
                        0.00,
                        $single_side_price,
                        $double_side_price,
                        $single_side_price_sqcm,
                        $double_side_price_sqcm,
                        1.00,
                        $size_mode,
                        $size_constraint_type,
                        $max_free_width_cm,
                        $max_free_height_cm,
                        $locked_size_id,
                        1,
                        $min_dpi,
                        $max_dpi,
                        $exact_dpi,
                        $dpi_mode,
                        $require_cmyk,
                        $production_days,
                        $status,
                        $allow_upload,
                        $is_four_file_mode,
                        $enable_design_service,
                        $enable_model_selection,
                        $model_selection_mandatory,
                        $multi_size_prices,
                        $print_sides,
                        $image,
                        2.0,
                        $max_file_size_mb,
                        $max_design_ref_size_mb
                    ]);
                    
                    $product_id = $pdo->lastInsertId();

                    // ⭐ هندل کردن آپلود مدل‌های انتخابی - نسخه اصلاح شده با نام اصلی فایل
                    if (isset($_FILES['model_files']) && !empty($_FILES['model_files']['name'][0])) {
                        $modelFiles = $_FILES['model_files'];
                        
                        foreach ($modelFiles['name'] as $key => $originalName) {
                            if ($modelFiles['error'][$key] !== UPLOAD_ERR_OK) continue;
                            
                            $ext = strtolower(pathinfo($originalName, PATHINFO_EXTENSION));
                            if (!in_array($ext, ['jpg', 'jpeg', 'png', 'webp'])) continue;

                            // پاک کردن نام فایل (فقط حروف، اعداد، خط تیره و زیرخط مجاز)
                            $baseName = pathinfo($originalName, PATHINFO_FILENAME);
                            $cleanName = preg_replace('/[^a-zA-Z0-9\-_]/', '_', $baseName);
                            
                            // اگر خالی شد، یه نام پیش‌فرض بذار
                            if (empty($cleanName)) {
                                $cleanName = 'model_' . time();
                            }
                            
                            $finalFileName = $cleanName . '.' . $ext;
                            $finalCode = $cleanName;
                            
                            // چک کردن تکراری بودن - اضافه کردن عدد در صورت نیاز
                            $counter = 1;
                            $originalCleanName = $cleanName;
                            
                            while (file_exists('../uploads/' . $finalFileName)) {
                                $finalCode = $originalCleanName . '_' . $counter;
                                $finalFileName = $finalCode . '.' . $ext;
                                $counter++;
                            }

                            if (move_uploaded_file($modelFiles['tmp_name'][$key], '../uploads/' . $finalFileName)) {
                                $stmtM = $pdo->prepare("INSERT INTO product_model_images (product_id, file_path, image_code) VALUES (?, ?, ?)");
                                $stmtM->execute([$product_id, $finalFileName, $finalCode]);
                            }
                        }
                    }

                    if ($type === 'download' && !empty($_POST['download_titles'])) {
                        $titles = $_POST['download_titles'];
                        $storage_types = $_POST['storage_types'] ?? [];
                        $private_filenames = $_POST['private_filenames'] ?? [];
                        $external_urls = $_POST['external_urls'] ?? [];
                        
                        foreach ($titles as $key => $dl_title) {
                            $dl_title = clean($dl_title);
                            if (empty($dl_title)) continue;
                            
                            $storage_type = $storage_types[$key] ?? 'local';
                            
                            if ($storage_type === 'local' && !empty($_FILES['download_files']['name'][$key])) {
                                $dlDir = '../uploads/downloads/';
                                if (!is_dir($dlDir)) mkdir($dlDir, 0755, true);
                                
                                $file = $_FILES['download_files'];
                                if ($file['error'][$key] === UPLOAD_ERR_OK) {
                                    $ext = strtolower(pathinfo($file['name'][$key], PATHINFO_EXTENSION));
                                    if (in_array($ext, ['zip','rar','pdf','jpg','png','mp4','mp3','psd','ai','doc','docx','ppt','pptx'])) {
                                        $newName = 'dl_' . uniqid() . '.' . $ext;
                                        if (move_uploaded_file($file['tmp_name'][$key], $dlDir . $newName)) {
                                            $stmtDl = $pdo->prepare("
                                                INSERT INTO product_downloads 
                                                (product_id, title, file_path, storage_type, sort_order) 
                                                VALUES (?, ?, ?, 'local', ?)
                                            ");
                                            $stmtDl->execute([$product_id, $dl_title, $newName, $key]);
                                        }
                                    }
                                }
                            } 
                            elseif ($storage_type === 'private' && !empty($private_filenames[$key])) {
                                $filename = basename(clean($private_filenames[$key]));
                                $privatePath = '../uploads/downloads/private/' . $filename;
                                
                                if (file_exists($privatePath)) {
                                    $stmtDl = $pdo->prepare("
                                        INSERT INTO product_downloads 
                                        (product_id, title, file_path, storage_type, sort_order) 
                                        VALUES (?, ?, ?, 'private', ?)
                                    ");
                                    $stmtDl->execute([$product_id, $dl_title, $filename, $key]);
                                }
                            }
                            elseif ($storage_type === 'external' && !empty($external_urls[$key])) {
                                $url = clean($external_urls[$key]);
                                $stmtDl = $pdo->prepare("
                                    INSERT INTO product_downloads 
                                    (product_id, title, download_url, storage_type, sort_order) 
                                    VALUES (?, ?, ?, 'external', ?)
                                ");
                                $stmtDl->execute([$product_id, $dl_title, $url, $key]);
                            }
                        }
                    }

                    if ($type === 'download' && !empty($_POST['edu_titles'])) {
                        $edu_titles = $_POST['edu_titles'];
                        $edu_types = $_POST['edu_types'] ?? [];
                        $edu_storage_types = $_POST['edu_storage_types'] ?? [];
                        $edu_private_filenames = $_POST['edu_private_filenames'] ?? [];
                        $edu_external_urls = $_POST['edu_external_urls'] ?? [];
                        
                        foreach ($edu_titles as $key => $edu_title) {
                            $edu_title = clean($edu_title);
                            if (empty($edu_title)) continue;
                            
                            $file_type = $edu_types[$key] ?? 'video';
                            $storage_type = $edu_storage_types[$key] ?? 'local';
                            
                            $file_path = null;
                            $download_url = null;
                            
                            if ($storage_type === 'local' && !empty($_FILES['edu_files']['name'][$key])) {
                                $eduDir = '../uploads/educational/';
                                if (!is_dir($eduDir)) mkdir($eduDir, 0755, true);
                                
                                $file = $_FILES['edu_files'];
                                if ($file['error'][$key] === UPLOAD_ERR_OK) {
                                    $ext = strtolower(pathinfo($file['name'][$key], PATHINFO_EXTENSION));
                                    
                                    $allowedExts = [];
                                    if ($file_type === 'video') {
                                        $allowedExts = ['mp4', 'webm', 'mov'];
                                    } elseif ($file_type === 'audio') {
                                        $allowedExts = ['mp3', 'wav', 'ogg'];
                                    } elseif ($file_type === 'pdf') {
                                        $allowedExts = ['pdf'];
                                    }
                                    
                                    if (in_array($ext, $allowedExts)) {
                                        $newName = 'edu_' . uniqid() . '.' . $ext;
                                        if (move_uploaded_file($file['tmp_name'][$key], $eduDir . $newName)) {
                                            $file_path = $newName;
                                        }
                                    }
                                }
                            } 
                            elseif ($storage_type === 'private' && !empty($edu_private_filenames[$key])) {
                                $filename = basename(clean($edu_private_filenames[$key]));
                                $privatePath = '../uploads/educational/private/' . $filename;
                                
                                if (file_exists($privatePath)) {
                                    $file_path = $filename;
                                }
                            }
                            elseif ($storage_type === 'external' && !empty($edu_external_urls[$key])) {
                                $download_url = clean($edu_external_urls[$key]);
                            }
                            
                            if ($file_path || $download_url) {
                                $stmtEdu = $pdo->prepare("
                                    INSERT INTO product_educational_files 
                                    (product_id, title, file_path, download_url, storage_type, file_type, sort_order) 
                                    VALUES (?, ?, ?, ?, ?, ?, ?)
                                ");
                                $stmtEdu->execute([
                                    $product_id, 
                                    $edu_title, 
                                    $file_path, 
                                    $download_url, 
                                    $storage_type, 
                                    $file_type, 
                                    $key
                                ]);
                            }
                        }
                    }

                    if (!empty($_FILES['gallery_images']['name'][0])) {
                        $files = $_FILES['gallery_images'];
                        foreach ($files['name'] as $key => $name) {
                            if ($files['error'][$key] === UPLOAD_ERR_OK) {
                                $ext = strtolower(pathinfo($name, PATHINFO_EXTENSION));
                                if (in_array($ext, ['jpg','jpeg','png','webp'])) {
                                    $newName = uniqid('gal_') . '.' . $ext;
                                    if (move_uploaded_file($files['tmp_name'][$key], '../uploads/' . $newName)) {
                                        $stmtMedia = $pdo->prepare("INSERT INTO product_media (product_id, type, file_path, sort_order) VALUES (?, 'image', ?, ?)");
                                        $stmtMedia->execute([$product_id, $newName, $key]);
                                    }
                                }
                            }
                        }
                    }

                    if (!empty($_FILES['gallery_videos']['name'][0])) {
                        $files = $_FILES['gallery_videos'];
                        foreach ($files['name'] as $key => $name) {
                            if ($files['error'][$key] === UPLOAD_ERR_OK) {
                                $ext = strtolower(pathinfo($name, PATHINFO_EXTENSION));
                                if (in_array($ext, ['mp4','webm','mov'])) {
                                    $newName = uniqid('vid_') . '.' . $ext;
                                    if (move_uploaded_file($files['tmp_name'][$key], '../uploads/' . $newName)) {
                                        $stmtMedia = $pdo->prepare("INSERT INTO product_media (product_id, type, file_path, sort_order) VALUES (?, 'video', ?, ?)");
                                        $stmtMedia->execute([$product_id, $newName, $key]);
                                    }
                                }
                            }
                        }
                    }

                    if (!empty($_POST['services'])) {
                        $srv_stmt = $pdo->prepare("INSERT INTO product_services (product_id, service_id) VALUES (?, ?)");
                        foreach ($_POST['services'] as $srv_id) $srv_stmt->execute([$product_id, (int)$srv_id]);
                    }
                    
                    $pdo->commit();
                    $success = '✅ محصول با موفقیت اضافه شد.';
                } catch (Exception $e) {
                    $pdo->rollBack(); 
                    @unlink('../uploads/' . $image);
                    $error = 'خطا در ثبت محصول: ' . $e->getMessage();
                }
            }
        }
    }
}

 $page_title = 'افزودن محصول جدید';
include 'header.php';
?>

<div class="d-flex justify-content-between align-items-center mb-4">
    <h3 class="fw-bold text-dark">افزودن محصول جدید</h3>
    <a href="products.php" class="btn btn-outline-secondary">
        <i class="bi bi-arrow-right me-1"></i> بازگشت به لیست
    </a>
</div>

<?php if ($success): ?>
    <div class="alert alert-success alert-dismissible fade show" role="alert">
        <?php echo htmlspecialchars($success); ?>
        <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
    </div>
<?php endif; ?>

<?php if ($error): ?>
    <div class="alert alert-danger alert-dismissible fade show" role="alert">
        <?php echo htmlspecialchars($error); ?>
        <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
    </div>
<?php endif; ?>

<div class="card shadow-sm border-0">
    <div class="card-body p-4">
        <form method="POST" enctype="multipart/form-data">
            <?php echo csrf_token(); ?>
            
            <div class="row">
                <div class="col-lg-8">
                    <div class="mb-4">
                        <h6 class="text-primary fw-bold border-bottom pb-2 mb-3">اطلاعات پایه</h6>
                        <div class="mb-3">
                            <label for="title" class="form-label fw-bold">عنوان محصول <span class="text-danger">*</span></label>
                            <input type="text" name="title" id="title" class="form-control form-control-lg" required placeholder="نام محصول...">
                        </div>
                        <div class="mb-3">
                            <label for="description" class="form-label">توضیحات محصول</label>
                            <textarea name="description" id="description" class="form-control" rows="4"></textarea>
                        </div>
                        <div class="mb-3 p-3 bg-light border rounded">
                            <label class="form-label fw-bold text-primary">نوع محصول</label>
                            <div class="form-check form-check-inline">
                                <input class="form-check-input" type="radio" name="type" id="typePrint" value="print" checked onchange="toggleProductType()">
                                <label class="form-check-label" for="typePrint">محصول چاپی (فیزیکی)</label>
                            </div>
                            <div class="form-check form-check-inline">
                                <input class="form-check-input" type="radio" name="type" id="typeSimple" value="simple" onchange="toggleProductType()">
                                <label class="form-check-label" for="typeSimple">محصول ساده</label>
                            </div>
                            <div class="form-check form-check-inline">
                                <input class="form-check-input" type="radio" name="type" id="typeDownload" value="download" onchange="toggleProductType()">
                                <label class="form-check-label" for="typeDownload">محصول دانلودی (فایل/دیجیتال)</label>
                            </div>
                        </div>
                    </div>

                    <div id="simpleSettings" class="card mb-4 bg-success bg-opacity-10 border-success" style="display:none;">
                        <div class="card-body">
                            <h6 class="fw-bold text-success mb-3"><i class="bi bi-box"></i> تنظیمات محصول ساده</h6>
                            
                            <div class="mb-3">
                                <label class="form-label fw-bold">قیمت محصول (تومان) <span class="text-danger">*</span></label>
                                <input type="number" name="simple_price" class="form-control" min="0" step="100" placeholder="مثلاً: 50000" value="0">
                                <small class="text-muted">قیمت ثابت برای این محصول</small>
                            </div>
                        </div>
                    </div>

                    <div id="downloadSettings" class="card mb-4 bg-info bg-opacity-10 border-info" style="display:none;">
                        <div class="card-body">
                            <h6 class="fw-bold text-info mb-3"><i class="bi bi-cloud-download"></i> تنظیمات فایل‌های دانلودی</h6>
                            
                            <div class="mb-3">
                                <label class="form-label fw-bold">قیمت محصول (تومان) <span class="text-danger">*</span></label>
                                <input type="number" name="download_price" class="form-control" min="0" step="100" placeholder="مثلاً: 50000">
                            </div>
                            
                            <div class="mb-3">
                                <label class="form-label fw-bold">فایل‌ها یا لینک‌های دانلود</label>
                                <small class="text-muted mb-2 d-block">
                                    می‌توانید چندین فایل اضافه کنید. برای هر فایل: عنوان، روش ذخیره‌سازی و فایل/لینک را مشخص کنید.
                                </small>
                                
                                <div id="downloadFilesContainer">
                                    <div class="card mb-3 border shadow-sm download-row">
                                        <div class="card-body p-3">
                                            <div class="mb-2">
                                                <label class="form-label small fw-bold">عنوان بخش</label>
                                                <input type="text" name="download_titles[]" class="form-control form-control-sm" placeholder="مثال: ویدیوی آموزشی - بخش ۱">
                                            </div>
                                            
                                            <div class="mb-2">
                                                <label class="form-label small fw-bold">روش ذخیره‌سازی</label>
                                                <select name="storage_types[]" class="form-select form-select-sm storage-type-select" onchange="toggleRowStorageType(this)">
                                                    <option value="local">📁 آپلود مستقیم</option>
                                                    <option value="private">🔒 آپلود جداگانه (FTP)</option>
                                                    <option value="external">🌐 لینک خارجی</option>
                                                </select>
                                            </div>
                                            
                                            <div class="storage-input local-input">
                                                <label class="form-label small">فایل را انتخاب کنید</label>
                                                <input type="file" name="download_files[]" class="form-control form-control-sm" accept=".zip,.rar,.pdf,.jpg,.png,.mp4,.mp3,.psd,.ai,.doc,.docx,.ppt,.pptx">
                                            </div>
                                            
                                            <div class="storage-input private-input" style="display:none;">
                                                <label class="form-label small">نام فایل روی سرور (پوشه private)</label>
                                                <input type="text" name="private_filenames[]" class="form-control form-control-sm" placeholder="مثال: video-part1.zip">
                                            </div>
                                            
                                            <div class="storage-input external-input" style="display:none;">
                                                <label class="form-label small">لینک مستقیم</label>
                                                <input type="url" name="external_urls[]" class="form-control form-control-sm" placeholder="https://...">
                                                <small class="text-danger">⚠️ هر کسی با این لینک می‌تواند دانلود کند</small>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                
                                <button type="button" class="btn btn-sm btn-outline-info" onclick="addDownloadFileRow()">
                                    <i class="bi bi-plus-circle"></i> افزودن فایل دیگر
                                </button>
                            </div>

                            <hr class="my-4">
                            <div class="mb-3">
                                <h6 class="fw-bold text-warning mb-3"><i class="bi bi-shield-lock"></i> فایل‌های آموزشی (قفل‌شده - فقط پخش)</h6>
                                <small class="text-muted mb-2 d-block">
                                    این فایل‌ها فقط برای مشتریانی که پرداخت کرده‌اند قابل مشاهده است. امکان دانلود، اسکرین‌شات یا ضبط وجود ندارد.
                                    <br>
                                    <strong>فرمت‌های مجاز:</strong> ویدیو (MP4, WebM, MOV) | صوت (MP3, WAV, OGG) | PDF
                                </small>
                                
                                <div id="educationalFilesContainer">
                                    <div class="card mb-3 border shadow-sm educational-row border-warning">
                                        <div class="card-body p-3">
                                            <div class="d-flex justify-content-between mb-2">
                                                <label class="form-label small fw-bold m-0 text-warning">فایل آموزشی جدید</label>
                                                <button type="button" class="btn btn-sm btn-outline-danger" onclick="this.closest('.educational-row').remove()">
                                                    <i class="bi bi-trash"></i> حذف
                                                </button>
                                            </div>
                                            
                                            <div class="mb-2">
                                                <label class="form-label small">عنوان فایل</label>
                                                <input type="text" name="edu_titles[]" class="form-control form-control-sm" placeholder="مثال: جلسه اول - آموزش کامل">
                                            </div>
                                            
                                            <div class="mb-2">
                                                <label class="form-label small">نوع فایل</label>
                                                <select name="edu_types[]" class="form-select form-select-sm edu-type-select" onchange="toggleEduFileAccept(this)">
                                                    <option value="video">🎬 ویدیو</option>
                                                    <option value="audio">🎵 صوت</option>
                                                    <option value="pdf">📄 PDF</option>
                                                </select>
                                            </div>
                                            
                                            <div class="mb-2">
                                                <label class="form-label small">روش ذخیره‌سازی</label>
                                                <select name="edu_storage_types[]" class="form-select form-select-sm edu-storage-type-select" onchange="toggleEduStorageType(this)">
                                                    <option value="local">📁 آپلود مستقیم</option>
                                                    <option value="private">🔒 آپلود جداگانه (FTP)</option>
                                                    <option value="external">🌐 لینک خارجی</option>
                                                </select>
                                            </div>
                                            
                                            <div class="edu-storage-input edu-local-input">
                                                <label class="form-label small">فایل را انتخاب کنید</label>
                                                <input type="file" name="edu_files[]" class="form-control form-control-sm edu-file-input" accept=".mp4,.webm,.mov">
                                                <small class="text-muted edu-file-hint">فرمت‌های مجاز: MP4, WebM, MOV</small>
                                            </div>
                                            
                                            <div class="edu-storage-input edu-private-input" style="display:none;">
                                                <label class="form-label small">نام فایل روی سرور (پوشه educational/private)</label>
                                                <input type="text" name="edu_private_filenames[]" class="form-control form-control-sm" placeholder="مثال: session1.mp4">
                                            </div>
                                            
                                            <div class="edu-storage-input edu-external-input" style="display:none;">
                                                <label class="form-label small">لینک مستقیم</label>
                                                <input type="url" name="edu_external_urls[]" class="form-control form-control-sm" placeholder="https://...">
                                                <small class="text-danger">⚠️ فقط برای تست - امنیت پایین‌تر</small>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                                
                                <button type="button" class="btn btn-sm btn-outline-warning" onclick="addEducationalFileRow()">
                                    <i class="bi bi-plus-circle"></i> افزودن فایل آموزشی
                                </button>
                            </div>
                        </div>
                    </div>

                    <div id="printSettings" class="card mb-4 bg-light border-0">
                        <div class="card-body">
                            <h6 class="fw-bold text-dark mb-3"><i class="bi bi-layers me-2"></i>تنظیمات چاپ و سایز</h6>
                            <div class="form-check form-switch mb-3">
                                <input class="form-check-input" type="checkbox" name="has_double_side" id="hasDoubleSide" onchange="toggleDoubleSide()">
                                <label class="form-check-label fw-bold" for="hasDoubleSide">این محصول قابلیت چاپ دو-رو دارد</label>
                            </div>
                            <div class="mb-3">
                                <label class="form-label fw-bold">حالت سایز</label>
                                <select name="size_mode" id="sizeMode" class="form-select" onchange="toggleSize()">
                                    <option value="free">سایز آزاد (مشتری وارد می‌کند)</option>
                                    <option value="multi">چند سایزه (انتخاب چند سایز با قیمت مجزا)</option>
                                </select>
                            </div>
                            <div id="sizeConstraintBlock" class="alert alert-info border p-3 mb-3" style="display:none;">
                                <h6 class="fw-bold text-info mb-2">محدودیت سایز آزاد</h6>
                                <div class="mb-2">
                                    <label class="form-label small">نوع محدودیت</label>
                                    <select id="constraintType" name="size_constraint_type" class="form-select form-select-sm" onchange="toggleConstraintInputs()">
                                        <option value="none">بدون محدودیت</option>
                                        <option value="width">محدودیت عرض</option>
                                        <option value="height">محدودیت طول</option>
                                        <option value="both">محدودیت هر دو</option>
                                    </select>
                                </div>
                                <div class="row">
                                    <div id="conWidthDiv" class="col-md-6" style="display:none;">
                                        <label class="form-label small">حداکثر عرض (cm)</label>
                                        <input type="number" step="0.1" name="max_free_width_cm" class="form-control form-control-sm" min="1">
                                    </div>
                                    <div id="conHeightDiv" class="col-md-6" style="display:none;">
                                        <label class="form-label small">حداکثر طول (cm)</label>
                                        <input type="number" step="0.1" name="max_free_height_cm" class="form-control form-control-sm" min="1">
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>

                    <div class="card mb-4 bg-light border-0">
                        <div class="card-body">
                            <h6 class="fw-bold text-primary mb-3"><i class="bi bi-images me-2"></i>تنظیمات گالری طرح‌ها</h6>
                            
                            <div class="form-check form-switch mb-3">
                                <input class="form-check-input" type="checkbox" name="enable_model_selection" id="enableModelSelection">
                                <label class="form-check-label fw-bold" for="enableModelSelection">فعال‌سازی قابلیت انتخاب طرح توسط مشتری؟</label>
                            </div>
                            
                            <div class="form-check form-switch mb-3">
                                <input class="form-check-input" type="checkbox" name="model_selection_mandatory" id="modelSelectionMandatory">
                                <label class="form-check-label fw-bold" for="modelSelectionMandatory">اجبار بودن انتخاب (تعداد طرح = تعداد سفارش)</label>
                            </div>

                            <div class="mb-3">
                                <label class="form-label small fw-bold">افزودن طرح‌های اولیه (اختیاری)</label>
                                <input type="file" name="model_files[]" class="form-control form-control-sm" multiple accept="image/*">
                                <small class="text-muted">نام فایل به عنوان کد طرح در نظر گرفته می‌شود. اگر نام تکراری باشد، عدد اضافه می‌شود.</small>
                            </div>
                        </div>
                    </div>

                    <div id="normalPricingBlock" class="card mb-4 bg-light border-0">
                        <div class="card-body">
                            <h6 class="fw-bold text-primary mb-3"><i class="bi bi-currency-dollar me-2"></i>قیمت‌گذاری</h6>
                            <div class="mb-3">
                                <label class="form-label fw-bold">مدل قیمت‌گذاری</label>
                                <select id="pricingModel" name="pricing_model" class="form-select" onchange="togglePricingModel()">
                                    <option value="area_based">بر اساس مساحت (سانتی‌متر مربع)</option>
                                </select>
                            </div>
                            <div id="doubleSidePrices" style="display:none;">
                                <div id="priceFixedGroup" class="row mb-2" style="display:none;">
                                    <div class="col-md-6 mb-2"><label class="form-label">قیمت یک‌رو (ثابت)</label><input type="number" name="single_side_price" class="form-control" min="0" step="1000" value="0"></div>
                                    <div class="col-md-6 mb-2"><label class="form-label">قیمت دو-رو (ثابت)</label><input type="number" name="double_side_price" class="form-control" min="0" step="1000" value="0"></div>
                                </div>
                                <div id="priceAreaGroup" class="row mb-2">
                                    <div class="col-md-6 mb-2"><label class="form-label">قیمت هر سانتی‌متر مربع یک‌رو</label><input type="number" name="single_side_price_sqcm" class="form-control" min="0" step="0.01" value="0"></div>
                                    <div class="col-md-6 mb-2"><label class="form-label">قیمت هر سانتی‌متر مربع دو-رو</label><input type="number" name="double_side_price_sqcm" class="form-control" min="0" step="0.01" value="0"></div>
                                </div>
                            </div>
                            <div id="simplePrice" class="mb-3">
                                <label class="form-label fw-bold">قیمت <span id="simpleLabel"></span></label>
                                <input type="number" id="simpleInput" name="" class="form-control" min="0" step="0.01" value="0">
                            </div>
                        </div>
                    </div>

                    <div id="multiSizeBlock" class="card mb-4 bg-warning bg-opacity-10 border-warning border-0" style="display:none;">
                        <div class="card-body">
                            <h6 class="fw-bold text-warning mb-3">قیمت‌گذاری چند سایزه</h6>
                            <p class="small text-muted mb-3">لطفاً سایزهای مورد نظر را انتخاب کنید و قیمت را وارد نمایید.</p>
                            <div id="multiSizeContainer">
                                <?php foreach ($sizes as $sz): ?>
                                <div class="card mb-2 border shadow-sm">
                                    <div class="card-body py-2 d-flex align-items-center flex-wrap gap-3">
                                        <div><input type="checkbox" class="form-check-input size-check" name="multi_sizes[]" value="<?php echo htmlspecialchars($sz['id']); ?>" onchange="toggleMultiPriceInputs(this, <?php echo htmlspecialchars($sz['id']); ?>)"></div>
                                        <div class="fw-bold flex-grow-1"><?php echo htmlspecialchars($sz['title']); ?> (<?php echo htmlspecialchars($sz['width_cm']); ?>x<?php echo htmlspecialchars($sz['height_cm']); ?>)</div>
                                        <div class="row g-2 multi-price-inputs w-auto" style="display:none;">
                                            <div class="col-auto"><input type="number" placeholder="یک رو" name="price_single_<?php echo htmlspecialchars($sz['id']); ?>" class="form-control form-control-sm"></div>
                                            <div class="col-auto" id="doubleInput_<?php echo htmlspecialchars($sz['id']); ?>" style="display:none;"><input type="number" placeholder="دو رو" name="price_double_<?php echo htmlspecialchars($sz['id']); ?>" class="form-control form-control-sm"></div>
                                        </div>
                                    </div>
                                </div>
                                <?php endforeach; ?>
                            </div>
                        </div>
                    </div>

                    <div id="technicalSettings" class="card mb-4 bg-light border-0">
                        <div class="card-body">
                            <h6 class="fw-bold text-dark mb-3"><i class="bi bi-gear me-2"></i>تنظیمات فنی</h6>
                            <div class="row">
                                <div class="col-md-6 mb-3">
                                    <label class="form-label fw-bold">تنظیمات DPI</label>
                                    <select name="dpi_mode" id="dpiModeSelect" class="form-select" onchange="toggleDPIInputs()">
                                        <option value="range">بازه مجاز</option>
                                        <option value="exact">دقیقاً یک مقدار</option>
                                    </select>
                                    <div id="box_range" class="row mt-2"><div class="col-6"><input type="number" name="min_dpi" class="form-control form-control-sm" value="300" placeholder="Min"></div><div class="col-6"><input type="number" name="max_dpi" class="form-control form-control-sm" value="600" placeholder="Max"></div></div>
                                    <div id="box_exact" class="mt-2" style="display:none;"><input type="number" name="exact_dpi" class="form-control form-control-sm" value="300"></div>
                                </div>
                                <div class="col-md-6 mb-3">
                                    <label class="form-label fw-bold">روزهای تولید</label>
                                    <input type="number" name="production_days" class="form-control" value="7" min="1">
                                </div>
                            </div>
                            <div class="row">
                                <div class="col-md-6 mb-3"><label class="form-label fw-bold">حداکثر حجم فایل (MB)</label><input type="number" name="max_file_size_mb" class="form-control" value="10" min="1"></div>
                                <div class="col-md-6 mb-3 d-flex align-items-end">
                                    <div class="form-check">
                                        <input class="form-check-input" type="checkbox" name="require_cmyk" id="requireCMYK">
                                        <label class="form-check-label fw-bold" for="requireCMYK">الزام فایل CMYK</label>
                                    </div>
                                </div>
                            </div>
                            <hr>
                            <div class="form-check form-switch mb-3">
                                <input class="form-check-input" type="checkbox" name="allow_upload" id="allowUpload">
                                <label class="form-check-label fw-bold" for="allowUpload">اجازه آپلود فایل توسط مشتری</label>
                            </div>
                            <div class="form-check form-switch mb-3">
                                <input class="form-check-input" type="checkbox" name="is_four_file_mode" id="isFourFileMode">
                                <label class="form-check-label fw-bold text-warning" for="isFourFileMode">فعال‌سازی حالت ۴ فایل (طلاکوب)</label>
                            </div>
                            <div class="form-check form-switch mb-3">
                                <input class="form-check-input" type="checkbox" name="enable_design_service" id="enableDesignService">
                                <label class="form-check-label fw-bold text-info" for="enableDesignService">فعال‌سازی سرویس درخواست طراحی</label>
                            </div>
                        </div>
                    </div>

                    <div class="row">
                        <div class="col-md-6 mb-3">
                            <label class="form-label fw-bold">دسته‌بندی</label>
                            <select name="category_id" class="form-select"><option value="">بدون دسته</option><?php foreach ($categories as $cat): ?><option value="<?php echo htmlspecialchars($cat['id']); ?>"><?php echo htmlspecialchars($cat['title']); ?></option><?php endforeach; ?></select>
                        </div>
                        <div class="col-md-6 mb-3">
                            <label class="form-label fw-bold">خدمات اضافی</label>
                            <div class="border p-2 rounded bg-white h-100 overflow-auto" style="max-height: 150px;">
                                <?php foreach ($services as $srv): ?>
                                    <div class="form-check">
                                        <input class="form-check-input" type="checkbox" name="services[]" value="<?php echo htmlspecialchars($srv['id']); ?>" id="srv<?php echo htmlspecialchars($srv['id']); ?>">
                                        <label class="form-check-label small" for="srv<?php echo htmlspecialchars($srv['id']); ?>"><?php echo htmlspecialchars($srv['title']); ?> (+<?php echo format_price($srv['price_unit']); ?>)</label>
                                    </div>
                                <?php endforeach; ?>
                            </div>
                        </div>
                    </div>
                    
                    <div class="form-check mb-4">
                        <input class="form-check-input" type="checkbox" name="status" id="status" checked>
                        <label class="form-check-label fw-bold" for="status">فعال و نمایش در سایت</label>
                    </div>

                </div>

                <div class="col-lg-4">
                    <div class="card shadow-sm border-primary mb-4">
                        <div class="card-header bg-primary text-white fw-bold">
                            <i class="bi bi-image me-2"></i> تصاویر و مدیا
                        </div>
                        <div class="card-body">
                            <div class="mb-4">
                                <label class="form-label fw-bold text-danger">تصویر شاخص <span class="text-danger">*</span></label>
                                <input type="file" name="image" class="form-control" accept=".jpg,.jpeg,.png" required>
                                <small class="text-muted">JPG یا PNG - در لیست محصولات نمایش داده می‌شود</small>
                            </div>
                            <hr>
                            <div class="mb-3"><label class="form-label fw-bold text-primary">گالری تصاویر</label><input type="file" name="gallery_images[]" class="form-control" multiple accept=".jpg,.jpeg,.png,.webp"></div>
                            <div class="mb-3"><label class="form-label fw-bold text-primary">گالری ویدیو</label><input type="file" name="gallery_videos[]" class="form-control" multiple accept=".mp4,.webm,.mov"></div>
                        </div>
                    </div>
                    <div class="d-grid">
                        <button type="submit" class="btn btn-success btn-lg shadow-sm"><i class="bi bi-check-circle me-2"></i> ثبت محصول</button>
                        <a href="products.php" class="btn btn-outline-secondary mt-2">انصراف</a>
                    </div>
                </div>
            </div>
        </form>
    </div>
</div>

<script>
function toggleProductType() {
    const type = document.querySelector('input[name="type"]:checked').value;
    const dlSettings = document.getElementById('downloadSettings');
    const simpleSettings = document.getElementById('simpleSettings');
    const printSettings = document.getElementById('printSettings');
    const normalPricing = document.getElementById('normalPricingBlock');
    const multiSize = document.getElementById('multiSizeBlock');
    const technical = document.getElementById('technicalSettings');

    dlSettings.style.display = 'none';
    simpleSettings.style.display = 'none';
    printSettings.style.display = 'none';
    normalPricing.style.display = 'none';
    multiSize.style.display = 'none';
    technical.style.display = 'none';

    if (type === 'download') {
        dlSettings.style.display = 'block';
    } else if (type === 'simple') {
        simpleSettings.style.display = 'block';
    } else {
        printSettings.style.display = 'block';
        normalPricing.style.display = 'block';
        technical.style.display = 'block';
        toggleSize();
    }
}

function toggleRowStorageType(select) {
    const row = select.closest('.download-row');
    const type = select.value;
    
    row.querySelectorAll('.storage-input').forEach(el => el.style.display = 'none');
    
    if (type === 'local') {
        row.querySelector('.local-input').style.display = 'block';
    } else if (type === 'private') {
        row.querySelector('.private-input').style.display = 'block';
    } else if (type === 'external') {
        row.querySelector('.external-input').style.display = 'block';
    }
}

function addDownloadFileRow() {
    const container = document.getElementById('downloadFilesContainer');
    const newRow = document.createElement('div');
    newRow.className = 'card mb-3 border shadow-sm download-row';
    newRow.innerHTML = `
        <div class="card-body p-3">
            <div class="d-flex justify-content-between mb-2">
                <label class="form-label small fw-bold m-0">فایل جدید</label>
                <button type="button" class="btn btn-sm btn-outline-danger" onclick="this.closest('.download-row').remove()">
                    <i class="bi bi-trash"></i> حذف
                </button>
            </div>
            
            <div class="mb-2">
                <label class="form-label small">عنوان بخش</label>
                <input type="text" name="download_titles[]" class="form-control form-control-sm" placeholder="مثال: ویدیوی آموزشی - بخش ۲">
            </div>
            
            <div class="mb-2">
                <label class="form-label small">روش ذخیره‌سازی</label>
                <select name="storage_types[]" class="form-select form-select-sm storage-type-select" onchange="toggleRowStorageType(this)">
                    <option value="local">📁 آپلود مستقیم</option>
                    <option value="private">🔒 آپلود جداگانه (FTP)</option>
                    <option value="external">🌐 لینک خارجی</option>
                </select>
            </div>
            
            <div class="storage-input local-input">
                <label class="form-label small">فایل را انتخاب کنید</label>
                <input type="file" name="download_files[]" class="form-control form-control-sm" accept=".zip,.rar,.pdf,.jpg,.png,.mp4,.mp3,.psd,.ai,.doc,.docx,.ppt,.pptx">
            </div>
            
            <div class="storage-input private-input" style="display:none;">
                <label class="form-label small">نام فایل روی سرور (پوشه private)</label>
                <input type="text" name="private_filenames[]" class="form-control form-control-sm" placeholder="مثال: video-part2.zip">
            </div>
            
            <div class="storage-input external-input" style="display:none;">
                <label class="form-label small">لینک مستقیم</label>
                <input type="url" name="external_urls[]" class="form-control form-control-sm" placeholder="https://...">
                <small class="text-danger">⚠️ هر کسی با این لینک می‌تواند دانلود کند</small>
            </div>
        </div>
    `;
    container.appendChild(newRow);
}

function toggleEduStorageType(select) {
    const row = select.closest('.educational-row');
    const type = select.value;
    
    row.querySelectorAll('.edu-storage-input').forEach(el => el.style.display = 'none');
    
    if (type === 'local') {
        row.querySelector('.edu-local-input').style.display = 'block';
    } else if (type === 'private') {
        row.querySelector('.edu-private-input').style.display = 'block';
    } else if (type === 'external') {
        row.querySelector('.edu-external-input').style.display = 'block';
    }
}

function toggleEduFileAccept(select) {
    const row = select.closest('.educational-row');
    const fileType = select.value;
    const fileInput = row.querySelector('.edu-file-input');
    const fileHint = row.querySelector('.edu-file-hint');
    
    if (fileType === 'video') {
        fileInput.accept = '.mp4,.webm,.mov';
        fileHint.textContent = 'فرمت‌های مجاز: MP4, WebM, MOV';
    } else if (fileType === 'audio') {
        fileInput.accept = '.mp3,.wav,.ogg';
        fileHint.textContent = 'فرمت‌های مجاز: MP3, WAV, OGG';
    } else if (fileType === 'pdf') {
        fileInput.accept = '.pdf';
        fileHint.textContent = 'فرمت مجاز: PDF';
    }
}

function addEducationalFileRow() {
    const container = document.getElementById('educationalFilesContainer');
    const newRow = document.createElement('div');
    newRow.className = 'card mb-3 border shadow-sm educational-row border-warning';
    newRow.innerHTML = `
        <div class="card-body p-3">
            <div class="d-flex justify-content-between mb-2">
                <label class="form-label small fw-bold m-0 text-warning">فایل آموزشی جدید</label>
                <button type="button" class="btn btn-sm btn-outline-danger" onclick="this.closest('.educational-row').remove()">
                    <i class="bi bi-trash"></i> حذف
                </button>
            </div>
            
            <div class="mb-2">
                <label class="form-label small">عنوان فایل</label>
                <input type="text" name="edu_titles[]" class="form-control form-control-sm" placeholder="مثال: جلسه دوم - تکمیل آموزش">
            </div>
            
            <div class="mb-2">
                <label class="form-label small">نوع فایل</label>
                <select name="edu_types[]" class="form-select form-select-sm edu-type-select" onchange="toggleEduFileAccept(this)">
                    <option value="video">🎬 ویدیو</option>
                    <option value="audio">🎵 صوت</option>
                    <option value="pdf">📄 PDF</option>
                </select>
            </div>
            
            <div class="mb-2">
                <label class="form-label small">روش ذخیره‌سازی</label>
                <select name="edu_storage_types[]" class="form-select form-select-sm edu-storage-type-select" onchange="toggleEduStorageType(this)">
                    <option value="local">📁 آپلود مستقیم</option>
                    <option value="private">🔒 آپلود جداگانه (FTP)</option>
                    <option value="external">🌐 لینک خارجی</option>
                </select>
            </div>
            
            <div class="edu-storage-input edu-local-input">
                <label class="form-label small">فایل را انتخاب کنید</label>
                <input type="file" name="edu_files[]" class="form-control form-control-sm edu-file-input" accept=".mp4,.webm,.mov">
                <small class="text-muted edu-file-hint">فرمت‌های مجاز: MP4, WebM, MOV</small>
            </div>
            
            <div class="edu-storage-input edu-private-input" style="display:none;">
                <label class="form-label small">نام فایل روی سرور (پوشه educational/private)</label>
                <input type="text" name="edu_private_filenames[]" class="form-control form-control-sm" placeholder="مثال: session2.mp4">
            </div>
            
            <div class="edu-storage-input edu-external-input" style="display:none;">
                <label class="form-label small">لینک مستقیم</label>
                <input type="url" name="edu_external_urls[]" class="form-control form-control-sm" placeholder="https://...">
                <small class="text-danger">⚠️ فقط برای تست - امنیت پایین‌تر</small>
            </div>
        </div>
    `;
    container.appendChild(newRow);
}

function toggleDoubleSide(){
    const c = document.getElementById('hasDoubleSide').checked;
    document.getElementById('doubleSidePrices').style.display = c ? 'block' : 'none';
    document.getElementById('simplePrice').style.display      = c ? 'none' : 'block';
    const doubleInputs = document.querySelectorAll('[id^="doubleInput_"]');
    doubleInputs.forEach(el => el.style.display = c ? 'block' : 'none');
    if(c) togglePricingModel();
}

function togglePricingModel(){
    const m = document.getElementById('pricingModel').value;
    const doubleBlock = document.getElementById('doubleSidePrices');
    if(doubleBlock.style.display === 'block'){
        document.getElementById('priceFixedGroup').style.display = (m==='fixed') ? 'flex' : 'none';
        document.getElementById('priceAreaGroup').style.display  = (m==='area_based') ? 'flex' : 'none';
    }else{
        document.getElementById('simpleLabel').textContent = (m==='fixed') ? '(ثابت)' : '(هر سانتی‌متر مربع)';
        document.getElementById('simpleInput').name = (m==='fixed') ? 'simple_price' : 'simple_price_sqcm';
        document.getElementById('simpleInput').step = (m==='fixed') ? '1000' : '0.01';
    }
}

function toggleSize(){
    const m = document.getElementById('sizeMode').value;
    document.getElementById('multiSizeBlock').style.display = (m==='multi') ? 'block' : 'none';
    document.getElementById('normalPricingBlock').style.display = (m==='multi') ? 'none' : 'block';
    document.getElementById('sizeConstraintBlock').style.display = (m==='free') ? 'block' : 'none';
    toggleConstraintInputs();
}

function toggleConstraintInputs(){
    const t = document.getElementById('constraintType').value;
    const wDiv = document.getElementById('conWidthDiv');
    const hDiv = document.getElementById('conHeightDiv');
    wDiv.style.display = (t === 'width' || t === 'both') ? 'block' : 'none';
    hDiv.style.display = (t === 'height' || t === 'both') ? 'block' : 'none';
}

function toggleDPIInputs(){
    const m = document.getElementById('dpiModeSelect').value;
    document.getElementById('box_range').style.display = (m==='range') ? 'flex' : 'none';
    document.getElementById('box_exact').style.display = (m==='exact') ? 'block' : 'none';
}

function toggleMultiPriceInputs(chk, sizeId) {
    const container = chk.closest('.card-body').querySelector('.multi-price-inputs');
    container.style.display = chk.checked ? 'flex' : 'none';
    const hasDouble = document.getElementById('hasDoubleSide').checked;
    document.getElementById('doubleInput_'+sizeId).style.display = (chk.checked && hasDouble) ? 'block' : 'none';
}

toggleProductType();
toggleDoubleSide();
toggleSize();
toggleDPIInputs();
</script>

<?php include 'footer.php'; ?>