/**
 * WooLogger Stok Yönetimi
 *
 * Bu kod, WooCommerce stok yönetimini geliştirir. Ürün listesine özel bir sütun ekler
 * ve ürün sayfalarında hızlı stok güncellemeleri için bir modal oluşturur.
 * Gerçek zamanlı stok durumu ve miktar güncellemeleri için AJAX işlevselliği sağlar.
 *
 * Oluşturan: woologger.com
 * Sürüm: 1.0
 */

// Admin Bar'a Stok Yönetimi Ekle
add_action('admin_bar_menu', 'woologger_custom_admin_bar_stock_management', 100);
function woologger_custom_admin_bar_stock_management($admin_bar) {
    if (!is_admin() && is_product() && current_user_can('edit_products')) {
        $admin_bar->add_menu(array(
            'id' => 'woologger-stock-management',
            'title' => '<span class="ab-icon dashicons dashicons-chart-area"></span> Stok Yönetimi',
            'href' => '#',
            'meta' => array(
                'onclick' => 'woologgerOpenStockManagement(); return false;',
            ),
        ));
    }
}

// Stok Durumu Güncelleme İşlemi
add_action('wp_ajax_woologger_update_stock_status', 'woologger_handle_update_stock_status');
function woologger_handle_update_stock_status() {
    check_ajax_referer('woologger_update_stock_status', 'security');
    
    $product_id = isset($_POST['product_id']) ? intval($_POST['product_id']) : 0;
    $new_status = isset($_POST['stock_status']) ? sanitize_text_field($_POST['stock_status']) : '';
    $new_quantity = isset($_POST['stock_quantity']) ? intval($_POST['stock_quantity']) : 0;
    
    $product = wc_get_product($product_id);
    
    if ($product) {
        $product->set_stock_status($new_status);
        if ($product->managing_stock() && $new_status === 'instock') {
            $product->set_stock_quantity($new_quantity);
        } elseif ($product->managing_stock()) {
            $product->set_stock_quantity(0);
        }
        $product->save();
        
        wc_delete_product_transients($product_id);
        
        wp_send_json_success(array('message' => 'Stok durumu başarıyla güncellendi.'));
    } else {
        wp_send_json_error(array('message' => 'Ürün bulunamadı.'));
    }
    
    wp_die();
}

// Stok Yönetimi Modalını Ekle
add_action('wp_footer', 'woologger_add_stock_management_modal');
function woologger_add_stock_management_modal() {
    if (is_product() && current_user_can('edit_products')) {
        global $product;
        ?>
        <div id="woologger-stock-management-modal" class="woologger-modal">
            <div class="woologger-modal-content">
                <span class="woologger-close">×</span>
                <h2>Stok Yönetimi</h2>
                <div id="woologger-stock-management-form">
                    <input type="hidden" id="woologger-product-id" value="<?php echo esc_attr($product->get_id()); ?>">
                    
                    <div class="woologger-form-group">
                        <label for="woologger-stock-status">Stok Durumu:</label>
                        <select id="woologger-stock-status">
                            <option value="instock" <?php selected($product->get_stock_status(), 'instock'); ?>>Stokta</option>
                            <option value="outofstock" <?php selected($product->get_stock_status(), 'outofstock'); ?>>Stokta Yok</option>
                            <option value="onbackorder" <?php selected($product->get_stock_status(), 'onbackorder'); ?>>Ön Siparişte</option>
                        </select>
                    </div>
                    
                    <?php if ($product->managing_stock()): ?>
                    <div class="woologger-form-group" id="woologger-quantity-group" style="display: <?php echo $product->get_stock_status() === 'instock' ? 'block' : 'none'; ?>">
                        <label for="woologger-stock-quantity">Stok Miktarı:</label>
                        <input type="number" id="woologger-stock-quantity" value="<?php echo esc_attr($product->get_stock_quantity()); ?>" min="0">
                    </div>
                    <?php endif; ?>
                    
                    <div class="woologger-button-group">
                        <button id="woologger-update-button" onclick="woologgerUpdateStockStatus()">Güncelle</button>
                        <button id="woologger-cancel-button" onclick="woologgerCloseStockManagement()">İptal</button>
                    </div>
                </div>
                <div id="woologger-update-message"></div>
            </div>
        </div>

        <style>
        .woologger-modal {
            display: none;
            position: fixed;
            z-index: 9999;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            overflow: auto;
            background-color: rgba(0,0,0,0.4);
        }
        .woologger-modal-content {
            background-color: #fefefe;
            margin: 15% auto;
            padding: 30px;
            border: none;
            width: 90%;
            max-width: 500px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }
        .woologger-close {
            color: #aaa;
            float: right;
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
            transition: 0.3s;
        }
        .woologger-close:hover,
        .woologger-close:focus {
            color: #000;
        }
        .woologger-modal h2 {
            margin-top: 0;
            color: #333;
            font-size: 24px;
            margin-bottom: 20px;
        }
        .woologger-form-group {
            margin-bottom: 20px;
        }
        .woologger-form-group label {
            display: block;
            margin-bottom: 8px;
            color: #555;
            font-weight: bold;
        }
        .woologger-form-group select,
        .woologger-form-group input[type="number"] {
            width: 100%;
            border: 1px solid #ddd;
            border-radius: 6px;
            box-sizing: border-box;
            font-size: 16px;
            transition: border-color 0.3s;
            height: 45px;
            -webkit-appearance: none;
            -moz-appearance: none;
            appearance: none;
            background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23007CB2%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E');
            background-repeat: no-repeat;
            background-position: right 12px top 50%;
            background-size: 12px auto;
            padding-right: 30px;
        }
        .woologger-form-group select:focus,
        .woologger-form-group input[type="number"]:focus {
            outline: none;
            border-color: #4CAF50;
        }
        .woologger-button-group {
            text-align: right;
            margin-top: 30px;
        }
        .woologger-button-group button {
            padding: 12px 20px;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            font-size: 16px;
            transition: background-color 0.3s;
        }
        #woologger-update-button {
            background-color: #4CAF50;
            color: white;
            margin-right: 10px;
        }
        #woologger-update-button:hover {
            background-color: #45a049;
        }
        #woologger-cancel-button {
            background-color: #f44336;
            color: white;
        }
        #woologger-cancel-button:hover {
            background-color: #da190b;
        }
        #woologger-update-message {
            margin-top: 20px;
            padding: 15px;
            border-radius: 6px;
            display: none;
            font-size: 16px;
            text-align: center;
        }
        @media (max-width: 600px) {
            .woologger-modal-content {
                width: 95%;
                padding: 20px;
            }
            .woologger-button-group button {
                width: 100%;
                margin-bottom: 10px;
            }
            #woologger-update-button {
                margin-right: 0;
            }
        }
        </style>

        <script>
        function woologgerOpenStockManagement() {
            document.getElementById('woologger-stock-management-modal').style.display = 'block';
            woologgerToggleQuantityField();
        }

        function woologgerCloseStockManagement() {
            document.getElementById('woologger-stock-management-modal').style.display = 'none';
        }

        function woologgerToggleQuantityField() {
            var stockStatus = document.getElementById('woologger-stock-status').value;
            var quantityGroup = document.getElementById('woologger-quantity-group');
            if (quantityGroup) {
                quantityGroup.style.display = (stockStatus === 'instock') ? 'block' : 'none';
            }
        }

        function woologgerUpdateStockStatus() {
            var productId = document.getElementById('woologger-product-id').value;
            var stockStatus = document.getElementById('woologger-stock-status').value;
            var stockQuantity = document.getElementById('woologger-stock-quantity') ? document.getElementById('woologger-stock-quantity').value : 0;

            jQuery.ajax({
                url: '<?php echo admin_url('admin-ajax.php'); ?>',
                type: 'POST',
                data: {
                    action: 'woologger_update_stock_status',
                    security: '<?php echo wp_create_nonce('woologger_update_stock_status'); ?>',
                    product_id: productId,
                    stock_status: stockStatus,
                    stock_quantity: stockQuantity
                },
                success: function(response) {
                    if (response.success) {
                        location.reload();
                    } else {
                        var messageElement = document.getElementById('woologger-update-message');
                        messageElement.innerHTML = response.data.message;
                        messageElement.style.display = 'block';
                        messageElement.style.backgroundColor = '#f2dede';
                        messageElement.style.color = '#a94442';
                    }
                }
            });
        }

        document.getElementById('woologger-stock-status').addEventListener('change', woologgerToggleQuantityField);

        window.onclick = function(event) {
            if (event.target == document.getElementById('woologger-stock-management-modal')) {
                woologgerCloseStockManagement();
            }
        }

        document.querySelector('.woologger-close').onclick = woologgerCloseStockManagement;
        </script>
        <?php
    }
}

// Stok Yönetimi Arayüzü için Özel CSS Stillerini Yükle
add_action('admin_head', 'woologger_add_custom_stock_styles');
function woologger_add_custom_stock_styles(): void {
    $screen = get_current_screen();
    if ($screen?->id !== 'edit-product') return;
    ?>
    <style>
    .wl-stock-info {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 5px;
        padding: 5px;
        border-radius: 4px;
        background-color: #f9f9f9;
        box-shadow: 0 1px 2px rgba(0,0,0,0.05);
        transition: all 0.3s ease;
    }
    .wl-stock-info:hover { background-color: #f0f0f0; }
    .wl-stock-status, .wl-stock-quantity {
        cursor: pointer;
        padding: 4px 8px;
        border-radius: 4px;
        font-size: 0.9em;
        text-align: center;
        transition: all 0.3s ease;
    }
    .wl-stock-status:hover, .wl-stock-quantity:hover { opacity: 0.8; }
    .wl-stock-status {
        font-weight: bold;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    .wl-stock-status.in-stock {
        background-color: #4CAF50;
        color: white;
    }
    .wl-stock-status.out-of-stock {
        background-color: #F44336;
        color: white;
    }
    .wl-stock-quantity {
        background-color: #e9e9e9;
        color: #333;
    }
    .wl-stock-quantity-input {
        width: 100%;
        text-align: center;
        padding: 4px;
        border: 1px solid #ccc;
        border-radius: 4px;
        font-size: 0.9em;
    }
    .wl-updating {
        opacity: 0.5;
        pointer-events: none;
    }
    @keyframes wl-spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }
    .wl-updating::after {
        content: '';
        display: inline-block;
        width: 12px;
        height: 12px;
        border: 2px solid #ccc;
        border-top: 2px solid #333;
        border-radius: 50%;
        animation: wl-spin 1s linear infinite;
        margin-left: 10px;
    }
    </style>
    <?php
}

// Ürün Listesine Özel Stok Sütunu Ekle
add_filter('manage_edit-product_columns', 'woologger_custom_product_column', 20);
function woologger_custom_product_column(array $columns): array {
    unset($columns['is_in_stock']);
    $columns['woologger_stock'] = __('Stok Durumu', 'woocommerce');
    return $columns;
}

// Özel Stok Sütununa İçerik Ekle
add_action('manage_product_posts_custom_column', 'woologger_custom_product_list_column_content', 20, 2);
function woologger_custom_product_list_column_content(string $column, int $product_id): void {
    if ($column != 'woologger_stock') return;
    
    $product = wc_get_product($product_id);
    $stock_status = $product->get_stock_status();
    $stock_quantity = $product->get_stock_quantity();
    $manage_stock = $product->get_manage_stock();
    
    $class = $stock_status == 'instock' ? 'in-stock' : 'out-of-stock';
    $text = $stock_status == 'instock' ? __('Stokta', 'woocommerce') : __('Stokta Yok', 'woocommerce');
    
    echo '<div class="wl-stock-info">';
    echo '<span class="wl-stock-status ' . esc_attr($class) . '" data-product-id="' . esc_attr($product_id) . '">' . 
         esc_html($text) . '</span>';

    if ($manage_stock && $stock_quantity !== null) {
        echo '<span class="wl-stock-quantity" data-product-id="' . esc_attr($product_id) . '">' . esc_html($stock_quantity) . ' adet</span>';
    }
    echo '</div>';
}

// Stok Durumu Değiştirme için Ajax İşleyicisi
add_action('wp_ajax_woologger_toggle_stock_status', 'woologger_toggle_stock_status');
function woologger_toggle_stock_status(): void {
    check_ajax_referer('woologger_stock_nonce', 'security');
    if (!current_user_can('edit_products')) {
        wp_send_json_error('İzin reddedildi');
    }

    $product_id = $_POST['product_id'] ?? 0;
    $product = wc_get_product($product_id);

    if (!$product) {
        wp_send_json_error('Ürün bulunamadı');
    }

    $current_status = $product->get_stock_status();
    $new_status = $current_status === 'instock' ? 'outofstock' : 'instock';
    $manage_stock = $product->get_manage_stock();

    if ($manage_stock) {
        if ($new_status == 'outofstock') {
            $product->set_stock_quantity(0);
        } else {
            $previous_quantity = get_post_meta($product_id, '_previous_stock_quantity', true);
            $product->set_stock_quantity($previous_quantity ? (int)$previous_quantity : 1); 
        }
    }

    $product->set_stock_status($new_status);
    $product->save();

    update_post_meta($product_id, '_previous_stock_quantity', $product->get_stock_quantity());

    $updated_product = wc_get_product($product_id);
    if ($updated_product->get_stock_status() !== $new_status) {
        wp_send_json_error('Stok durumu güncellenemedi');
    }

    wp_send_json_success([
        'status' => $new_status,
        'text' => $new_status === 'instock' ? __('Stokta', 'woocommerce') : __('Stokta Yok', 'woocommerce'),
        'quantity' => $manage_stock ? $updated_product->get_stock_quantity() : null
    ]);
}

// Stok Miktarı Güncelleme için Ajax İşleyicisi
add_action('wp_ajax_woologger_update_stock_quantity', 'woologger_update_stock_quantity');
function woologger_update_stock_quantity(): void {
    check_ajax_referer('woologger_stock_nonce', 'security');
    if (!current_user_can('edit_products')) {
        wp_send_json_error('İzin reddedildi');
    }

    $product_id = $_POST['product_id'] ?? 0;
    $new_quantity = $_POST['quantity'] ?? 0;
    
    $product = wc_get_product($product_id);
    if (!$product) {
        wp_send_json_error('Ürün bulunamadı');
    }

    $product->set_stock_quantity((int)$new_quantity);
    $product->set_stock_status($new_quantity > 0 ? 'instock' : 'outofstock');
    $product->save();

    update_post_meta($product_id, '_previous_stock_quantity', $new_quantity);

    $updated_product = wc_get_product($product_id);
    $new_status = $updated_product->get_stock_status();

    wp_send_json_success([
        'status' => $new_status,
        'text' => $new_status === 'instock' ? __('Stokta', 'woocommerce') : __('Stokta Yok', 'woocommerce'),
        'quantity' => $updated_product->get_stock_quantity()
    ]);
}

// Stok Yönetimi Etkileşimleri için JavaScript Ekle
add_action('admin_footer', 'woologger_add_custom_stock_toggle_script');
function woologger_add_custom_stock_toggle_script(): void {
    if (!function_exists('WC')) return;
    
    $screen = get_current_screen();
    if ($screen?->id !== 'edit-product') return;
    ?>
    <script type="text/javascript">
    document.addEventListener('DOMContentLoaded', function() {
        // AJAX istekleri için yardımcı fonksiyon
        function ajaxRequest(url, method, data, callback) {
            var xhr = new XMLHttpRequest();
            xhr.open(method, url, true);
            xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
            xhr.onreadystatechange = function() {
                if (xhr.readyState === 4) {
                    if (xhr.status === 200) {
                        callback(JSON.parse(xhr.responseText));
                    } else {
                        alert('AJAX hatası: ' + xhr.status);
                    }
                }
            };
            xhr.send(encodeURI(Object.keys(data).map(key => key + '=' + data[key]).join('&')));
        }

        // Stok durumunu değiştir
        document.querySelectorAll('.wl-stock-status').forEach(function(statusElement) {
            statusElement.addEventListener('click', function() {
                var stockInfo = this.closest('.wl-stock-info');
                var productId = this.dataset.productId;

                stockInfo.classList.add('wl-updating');

                ajaxRequest(ajaxurl, 'POST', {
                    action: 'woologger_toggle_stock_status',
                    product_id: productId,
                    security: '<?php echo wp_create_nonce('woologger_stock_nonce'); ?>'
                }, function(response) {
                    if (response.success) {
                        statusElement.textContent = response.data.text;
                        statusElement.classList.remove('in-stock', 'out-of-stock');
                        statusElement.classList.add(response.data.status === 'instock' ? 'in-stock' : 'out-of-stock');
                        if (response.data.quantity !== null) {
                            var quantitySpan = stockInfo.querySelector('.wl-stock-quantity');
                            if (quantitySpan) {
                                quantitySpan.textContent = response.data.quantity + ' adet';
                            } else {
                                var newQuantitySpan = document.createElement('span');
                                newQuantitySpan.className = 'wl-stock-quantity';
                                newQuantitySpan.dataset.productId = productId;
                                newQuantitySpan.textContent = response.data.quantity + ' adet';
                                stockInfo.appendChild(newQuantitySpan);
                            }
                        }
                    } else {
                        alert('Hata: ' + response.data);
                    }
                    stockInfo.classList.remove('wl-updating');
                });
            });
        });

        // Stok miktarını güncelle
        document.addEventListener('click', function(event) {
            if (event.target.classList.contains('wl-stock-quantity')) {
                var quantityElement = event.target;
                var productId = quantityElement.dataset.productId;
                var currentQuantity = parseInt(quantityElement.textContent, 10);

                var input = document.createElement('input');
                input.type = 'number';
                input.className = 'wl-stock-quantity-input';
                input.value = currentQuantity;

                quantityElement.style.display = 'none';
                quantityElement.parentNode.insertBefore(input, quantityElement.nextSibling);
                input.focus();

                input.addEventListener('blur', function() {
                    var newQuantity = parseInt(input.value, 10);
                    if (isNaN(newQuantity) || newQuantity < 0) {
                        input.remove();
                        quantityElement.style.display = '';
                        return;
                    }

                    var stockInfo = quantityElement.closest('.wl-stock-info');
                    stockInfo.classList.add('wl-updating');

                    ajaxRequest(ajaxurl, 'POST', {
                        action: 'woologger_update_stock_quantity',
                        product_id: productId,
                        quantity: newQuantity,
                        security: '<?php echo wp_create_nonce('woologger_stock_nonce'); ?>'
                    }, function(response) {
                        if (response.success) {
                            quantityElement.textContent = response.data.quantity + ' adet';
                            var statusSpan = stockInfo.querySelector('.wl-stock-status');
                            statusSpan.textContent = response.data.text;
                            statusSpan.classList.remove('in-stock', 'out-of-stock');
                            statusSpan.classList.add(response.data.status === 'instock' ? 'in-stock' : 'out-of-stock');
                        } else {
                            alert('Hata: ' + response.data);
                        }
                        input.remove();
                        quantityElement.style.display = '';
                        stockInfo.classList.remove('wl-updating');
                    });
                });
            }
        });
    });
    </script>
    <?php
}

// Özel Sütunu Sıralanabilir Yap
add_filter('manage_edit-product_sortable_columns', 'woologger_custom_product_sortable_columns');
function woologger_custom_product_sortable_columns(array $columns): array {
    $columns['woologger_stock'] = 'woologger_stock';
    return $columns;
}

// Özel Sütunun Sıralanmasını İşle
add_action('pre_get_posts', 'woologger_custom_product_orderby');
function woologger_custom_product_orderby($query): void {
    if (!is_admin() || !$query->is_main_query() || $query->get('post_type') !== 'product') return;

    $orderby = $query->get('orderby');
    if ('woologger_stock' == $orderby) {
        $query->set('meta_key', '_stock_status');
        $query->set('orderby', 'meta_value');
    }
}