<?php
/**
 * 后台管理类
 *
 * @package YooneSubscriptions
 */

if (!defined('ABSPATH')) {
    exit;
}

/**
 * Yoone_Admin类
 * 处理后台管理功能
 */
class Yoone_Admin {

    /**
     * 构造函数
     */
    public function __construct() {
        $this->init_hooks();
    }

    /**
     * 初始化钩子
     */
    private function init_hooks() {
        // 管理菜单
        add_action('admin_menu', array($this, 'add_admin_menus'));
        
        // 产品数据面板
        add_filter('woocommerce_product_data_tabs', array($this, 'add_product_data_tabs'));
        add_action('woocommerce_product_data_panels', array($this, 'add_product_data_panels'));
        add_action('woocommerce_process_product_meta', array($this, 'save_product_meta'));
        
        // 产品类型
        add_filter('product_type_selector', array($this, 'add_product_types'));
        
        // 订单管理
        add_action('add_meta_boxes', array($this, 'add_order_meta_boxes'));
        add_action('woocommerce_order_status_changed', array($this, 'handle_order_status_change'), 10, 4);
        
        // 列表表格
        add_filter('manage_edit-product_columns', array($this, 'add_product_columns'));
        add_action('manage_product_posts_custom_column', array($this, 'product_column_content'), 10, 2);
        
        // 设置页面
        add_filter('woocommerce_settings_tabs_array', array($this, 'add_settings_tab'), 50);
        add_action('woocommerce_settings_tabs_yoone_subscriptions', array($this, 'settings_tab_content'));
        add_action('woocommerce_update_options_yoone_subscriptions', array($this, 'update_settings'));
        
        // 通知
        add_action('admin_notices', array($this, 'admin_notices'));
    }

    /**
     * 添加管理菜单
     */
    public function add_admin_menus() {
        // 主菜单
        add_menu_page(
            __('Yoone 订阅', 'yoone-subscriptions'),
            __('Yoone 订阅', 'yoone-subscriptions'),
            'manage_woocommerce',
            'yoone-subscriptions',
            array($this, 'subscriptions_page'),
            'dashicons-update',
            56
        );

        // 订阅管理
        add_submenu_page(
            'yoone-subscriptions',
            __('订阅管理', 'yoone-subscriptions'),
            __('订阅管理', 'yoone-subscriptions'),
            'manage_woocommerce',
            'yoone-subscriptions',
            array($this, 'subscriptions_page')
        );

        // 混装产品
        add_submenu_page(
            'yoone-subscriptions',
            __('混装产品', 'yoone-subscriptions'),
            __('混装产品', 'yoone-subscriptions'),
            'manage_woocommerce',
            'yoone-bundles',
            array($this, 'bundles_page')
        );

        // 支付设置
        add_submenu_page(
            'yoone-subscriptions',
            __('支付设置', 'yoone-subscriptions'),
            __('支付设置', 'yoone-subscriptions'),
            'manage_woocommerce',
            'yoone-payment-settings',
            array($this, 'payment_settings_page')
        );

        // 报告
        add_submenu_page(
            'yoone-subscriptions',
            __('报告', 'yoone-subscriptions'),
            __('报告', 'yoone-subscriptions'),
            'manage_woocommerce',
            'yoone-reports',
            array($this, 'reports_page')
        );
    }

    /**
     * 订阅管理页面
     */
    public function subscriptions_page() {
        $action = isset($_GET['action']) ? $_GET['action'] : 'list';
        
        switch ($action) {
            case 'view':
                $this->view_subscription();
                break;
            case 'edit':
                $this->edit_subscription();
                break;
            default:
                $this->list_subscriptions();
                break;
        }
    }

    /**
     * 订阅列表
     */
    private function list_subscriptions() {
        global $wpdb;
        
        $per_page = 20;
        $current_page = isset($_GET['paged']) ? max(1, intval($_GET['paged'])) : 1;
        $offset = ($current_page - 1) * $per_page;
        
        $status_filter = isset($_GET['status']) ? $_GET['status'] : '';
        $search = isset($_GET['s']) ? $_GET['s'] : '';
        
        $where_conditions = array('1=1');
        $params = array();
        
        if ($status_filter) {
            $where_conditions[] = 'status = %s';
            $params[] = $status_filter;
        }
        
        if ($search) {
            $where_conditions[] = '(id LIKE %s OR customer_id IN (SELECT ID FROM ' . $wpdb->users . ' WHERE display_name LIKE %s OR user_email LIKE %s))';
            $params[] = '%' . $search . '%';
            $params[] = '%' . $search . '%';
            $params[] = '%' . $search . '%';
        }
        
        $where_clause = implode(' AND ', $where_conditions);
        
        // 获取总数
        $total_query = "SELECT COUNT(*) FROM {$wpdb->prefix}yoone_subscriptions WHERE {$where_clause}";
        $total_items = $wpdb->get_var($wpdb->prepare($total_query, $params));
        
        // 获取订阅列表
        $params[] = $per_page;
        $params[] = $offset;
        $subscriptions_query = "SELECT * FROM {$wpdb->prefix}yoone_subscriptions WHERE {$where_clause} ORDER BY created_at DESC LIMIT %d OFFSET %d";
        $subscriptions = $wpdb->get_results($wpdb->prepare($subscriptions_query, $params));
        
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'templates/admin/subscriptions-list.php';
    }

    /**
     * 查看订阅
     */
    private function view_subscription() {
        $subscription_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
        
        if (!$subscription_id) {
            wp_die(__('无效的订阅ID', 'yoone-subscriptions'));
        }
        
        global $wpdb;
        
        $subscription = $wpdb->get_row($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}yoone_subscriptions WHERE id = %d",
            $subscription_id
        ));
        
        if (!$subscription) {
            wp_die(__('订阅不存在', 'yoone-subscriptions'));
        }
        
        // 获取订阅项目
        $items = $wpdb->get_results($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}yoone_subscription_items WHERE subscription_id = %d",
            $subscription_id
        ));
        
        // 获取日志
        $logs = $wpdb->get_results($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}yoone_subscription_logs WHERE subscription_id = %d ORDER BY created_at DESC LIMIT 50",
            $subscription_id
        ));
        
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'templates/admin/subscription-view.php';
    }

    /**
     * 编辑订阅
     */
    private function edit_subscription() {
        $subscription_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
        
        if (!$subscription_id) {
            wp_die(__('无效的订阅ID', 'yoone-subscriptions'));
        }
        
        // 处理表单提交
        if (isset($_POST['submit'])) {
            $this->save_subscription($subscription_id);
        }
        
        global $wpdb;
        
        $subscription = $wpdb->get_row($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}yoone_subscriptions WHERE id = %d",
            $subscription_id
        ));
        
        if (!$subscription) {
            wp_die(__('订阅不存在', 'yoone-subscriptions'));
        }
        
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'templates/admin/subscription-edit.php';
    }

    /**
     * 保存订阅
     */
    private function save_subscription($subscription_id) {
        if (!wp_verify_nonce($_POST['_wpnonce'], 'edit_subscription_' . $subscription_id)) {
            wp_die(__('安全验证失败', 'yoone-subscriptions'));
        }
        
        global $wpdb;
        
        $update_data = array(
            'status' => sanitize_text_field($_POST['status']),
            'next_payment_date' => sanitize_text_field($_POST['next_payment_date']),
            'updated_at' => current_time('mysql')
        );
        
        $result = $wpdb->update(
            $wpdb->prefix . 'yoone_subscriptions',
            $update_data,
            array('id' => $subscription_id)
        );
        
        if ($result !== false) {
            add_action('admin_notices', function() {
                echo '<div class="notice notice-success"><p>' . __('订阅已更新', 'yoone-subscriptions') . '</p></div>';
            });
        }
    }

    /**
     * 混装产品页面
     */
    public function bundles_page() {
        $action = isset($_GET['action']) ? $_GET['action'] : 'list';
        
        switch ($action) {
            case 'add':
                $this->add_bundle();
                break;
            case 'edit':
                $this->edit_bundle();
                break;
            case 'delete':
                $this->delete_bundle();
                break;
            default:
                $this->list_bundles();
                break;
        }
    }

    /**
     * 添加混装产品
     */
    private function add_bundle() {
        if (isset($_POST['submit'])) {
            $this->save_bundle();
        }
        
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'templates/admin/bundle-add.php';
    }

    /**
     * 编辑混装产品
     */
    private function edit_bundle() {
        $bundle_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
        
        if (!$bundle_id) {
            wp_die(__('无效的混装产品ID', 'yoone-subscriptions'));
        }
        
        if (isset($_POST['submit'])) {
            $this->save_bundle($bundle_id);
        }
        
        global $wpdb;
        
        $bundle = $wpdb->get_row($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}yoone_bundles WHERE id = %d",
            $bundle_id
        ));
        
        if (!$bundle) {
            wp_die(__('混装产品不存在', 'yoone-subscriptions'));
        }
        
        $items = $wpdb->get_results($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}yoone_bundle_items WHERE bundle_id = %d ORDER BY sort_order",
            $bundle_id
        ));
        
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'templates/admin/bundle-edit.php';
    }

    /**
     * 删除混装产品
     */
    private function delete_bundle() {
        $bundle_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
        
        if (!$bundle_id) {
            wp_die(__('无效的混装产品ID', 'yoone-subscriptions'));
        }
        
        if (!wp_verify_nonce($_GET['_wpnonce'], 'delete_bundle_' . $bundle_id)) {
            wp_die(__('安全验证失败', 'yoone-subscriptions'));
        }
        
        global $wpdb;
        
        // 删除混装项目
        $wpdb->delete(
            $wpdb->prefix . 'yoone_bundle_items',
            array('bundle_id' => $bundle_id)
        );
        
        // 删除混装产品
        $result = $wpdb->delete(
            $wpdb->prefix . 'yoone_bundles',
            array('id' => $bundle_id)
        );
        
        if ($result) {
            wp_redirect(admin_url('admin.php?page=yoone-bundles&deleted=1'));
            exit;
        } else {
            wp_die(__('删除失败', 'yoone-subscriptions'));
        }
    }

    /**
     * 保存混装产品
     */
    private function save_bundle($bundle_id = 0) {
        $nonce_action = $bundle_id ? 'edit_bundle_' . $bundle_id : 'add_bundle';
        
        if (!wp_verify_nonce($_POST['_wpnonce'], $nonce_action)) {
            wp_die(__('安全验证失败', 'yoone-subscriptions'));
        }
        
        global $wpdb;
        
        $bundle_data = array(
            'name' => sanitize_text_field($_POST['name']),
            'description' => sanitize_textarea_field($_POST['description']),
            'discount_type' => sanitize_text_field($_POST['discount_type']),
            'discount_value' => floatval($_POST['discount_value']),
            'status' => sanitize_text_field($_POST['status']),
            'updated_at' => current_time('mysql')
        );
        
        if ($bundle_id) {
            // 更新现有混装产品
            $result = $wpdb->update(
                $wpdb->prefix . 'yoone_bundles',
                $bundle_data,
                array('id' => $bundle_id)
            );
        } else {
            // 创建新混装产品
            $bundle_data['created_at'] = current_time('mysql');
            $result = $wpdb->insert(
                $wpdb->prefix . 'yoone_bundles',
                $bundle_data
            );
            $bundle_id = $wpdb->insert_id;
        }
        
        if ($result !== false) {
            // 保存混装项目
            if (isset($_POST['bundle_items']) && is_array($_POST['bundle_items'])) {
                // 删除现有项目
                $wpdb->delete(
                    $wpdb->prefix . 'yoone_bundle_items',
                    array('bundle_id' => $bundle_id)
                );
                
                // 添加新项目
                foreach ($_POST['bundle_items'] as $sort_order => $item) {
                    $wpdb->insert(
                        $wpdb->prefix . 'yoone_bundle_items',
                        array(
                            'bundle_id' => $bundle_id,
                            'product_id' => intval($item['product_id']),
                            'quantity' => intval($item['quantity']),
                            'sort_order' => intval($sort_order)
                        )
                    );
                }
            }
            
            wp_redirect(admin_url('admin.php?page=yoone-bundles&saved=1'));
            exit;
        } else {
            wp_die(__('保存失败', 'yoone-subscriptions'));
        }
    }

    /**
     * 混装产品列表
     */
    private function list_bundles() {
        global $wpdb;
        
        $bundles = $wpdb->get_results(
            "SELECT * FROM {$wpdb->prefix}yoone_bundles ORDER BY created_at DESC"
        );
        
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'templates/admin/bundles-list.php';
    }

    /**
     * 支付设置页面
     */
    public function payment_settings_page() {
        if (isset($_POST['submit'])) {
            $this->save_payment_settings();
        }
        
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'templates/admin/payment-settings.php';
    }

    /**
     * 保存支付设置
     */
    private function save_payment_settings() {
        if (!wp_verify_nonce($_POST['_wpnonce'], 'yoone_payment_settings')) {
            wp_die(__('安全验证失败', 'yoone-subscriptions'));
        }
        
        $settings = array(
            'yoone_moneris_enabled' => isset($_POST['moneris_enabled']) ? 'yes' : 'no',
            'yoone_moneris_testmode' => isset($_POST['moneris_testmode']) ? 'yes' : 'no',
            'yoone_moneris_store_id' => sanitize_text_field($_POST['moneris_store_id']),
            'yoone_moneris_api_token' => sanitize_text_field($_POST['moneris_api_token']),
        );
        
        foreach ($settings as $key => $value) {
            update_option($key, $value);
        }
        
        add_action('admin_notices', function() {
            echo '<div class="notice notice-success"><p>' . __('设置已保存', 'yoone-subscriptions') . '</p></div>';
        });
    }

    /**
     * 报告页面
     */
    public function reports_page() {
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'templates/admin/reports.php';
    }

    /**
     * 添加产品数据标签
     */
    public function add_product_data_tabs($tabs) {
        $tabs['yoone_subscription'] = array(
            'label' => __('订阅设置', 'yoone-subscriptions'),
            'target' => 'yoone_subscription_data',
            'class' => array('show_if_simple', 'show_if_variable'),
        );
        
        $tabs['yoone_bundle'] = array(
            'label' => __('混装设置', 'yoone-subscriptions'),
            'target' => 'yoone_bundle_data',
            'class' => array('show_if_yoone_bundle'),
        );
        
        return $tabs;
    }

    /**
     * 添加产品数据面板
     */
    public function add_product_data_panels() {
        global $post;
        
        // 订阅设置面板
        echo '<div id="yoone_subscription_data" class="panel woocommerce_options_panel">';
        
        woocommerce_wp_checkbox(array(
            'id' => '_yoone_subscription_enabled',
            'label' => __('启用订阅', 'yoone-subscriptions'),
            'description' => __('将此产品设置为订阅产品', 'yoone-subscriptions'),
        ));
        
        woocommerce_wp_select(array(
            'id' => '_yoone_subscription_trial_period',
            'label' => __('试用期', 'yoone-subscriptions'),
            'options' => array(
                '' => __('无试用期', 'yoone-subscriptions'),
                '7' => __('7天', 'yoone-subscriptions'),
                '14' => __('14天', 'yoone-subscriptions'),
                '30' => __('30天', 'yoone-subscriptions'),
            ),
        ));
        
        echo '<div class="yoone-subscription-periods">';
        echo '<h4>' . __('订阅周期', 'yoone-subscriptions') . '</h4>';
        
        $periods = get_post_meta($post->ID, '_yoone_subscription_periods', true);
        if (!is_array($periods)) {
            $periods = array();
        }
        
        echo '<div id="yoone-subscription-periods-container">';
        foreach ($periods as $key => $period) {
            $this->render_subscription_period_row($key, $period);
        }
        echo '</div>';
        
        echo '<button type="button" class="button" id="add-subscription-period">' . __('添加周期', 'yoone-subscriptions') . '</button>';
        echo '</div>';
        
        echo '</div>';
        
        // 混装设置面板
        echo '<div id="yoone_bundle_data" class="panel woocommerce_options_panel">';
        
        woocommerce_wp_text_input(array(
            'id' => '_yoone_bundle_min_quantity',
            'label' => __('最小数量', 'yoone-subscriptions'),
            'type' => 'number',
            'custom_attributes' => array('min' => '1'),
        ));
        
        woocommerce_wp_select(array(
            'id' => '_yoone_bundle_discount_type',
            'label' => __('折扣类型', 'yoone-subscriptions'),
            'options' => array(
                'percentage' => __('百分比', 'yoone-subscriptions'),
                'fixed' => __('固定金额', 'yoone-subscriptions'),
            ),
        ));
        
        woocommerce_wp_text_input(array(
            'id' => '_yoone_bundle_discount_value',
            'label' => __('折扣值', 'yoone-subscriptions'),
            'type' => 'number',
            'custom_attributes' => array('step' => '0.01', 'min' => '0'),
        ));
        
        echo '<div class="yoone-bundle-items">';
        echo '<h4>' . __('混装项目', 'yoone-subscriptions') . '</h4>';
        echo '<div id="yoone-bundle-items-container"></div>';
        echo '<button type="button" class="button" id="search-bundle-products">' . __('添加产品', 'yoone-subscriptions') . '</button>';
        echo '</div>';
        
        echo '</div>';
    }

    /**
     * 渲染订阅周期行
     */
    private function render_subscription_period_row($key, $period) {
        echo '<div class="subscription-period-row">';
        echo '<input type="text" name="_yoone_subscription_periods[' . $key . '][name]" value="' . esc_attr($period['name']) . '" placeholder="' . __('周期名称', 'yoone-subscriptions') . '">';
        echo '<input type="number" name="_yoone_subscription_periods[' . $key . '][interval]" value="' . esc_attr($period['interval']) . '" placeholder="' . __('间隔', 'yoone-subscriptions') . '" min="1">';
        echo '<select name="_yoone_subscription_periods[' . $key . '][period]">';
        echo '<option value="day"' . selected($period['period'], 'day', false) . '>' . __('天', 'yoone-subscriptions') . '</option>';
        echo '<option value="week"' . selected($period['period'], 'week', false) . '>' . __('周', 'yoone-subscriptions') . '</option>';
        echo '<option value="month"' . selected($period['period'], 'month', false) . '>' . __('月', 'yoone-subscriptions') . '</option>';
        echo '<option value="year"' . selected($period['period'], 'year', false) . '>' . __('年', 'yoone-subscriptions') . '</option>';
        echo '</select>';
        echo '<input type="number" name="_yoone_subscription_periods[' . $key . '][discount_value]" value="' . esc_attr($period['discount_value']) . '" placeholder="' . __('折扣值', 'yoone-subscriptions') . '" step="0.01" min="0">';
        echo '<button type="button" class="button remove-period">' . __('删除', 'yoone-subscriptions') . '</button>';
        echo '</div>';
    }

    /**
     * 保存产品元数据
     */
    public function save_product_meta($post_id) {
        // 保存订阅设置
        $subscription_enabled = isset($_POST['_yoone_subscription_enabled']) ? 'yes' : 'no';
        update_post_meta($post_id, '_yoone_subscription_enabled', $subscription_enabled);
        
        if (isset($_POST['_yoone_subscription_trial_period'])) {
            update_post_meta($post_id, '_yoone_subscription_trial_period', sanitize_text_field($_POST['_yoone_subscription_trial_period']));
        }
        
        if (isset($_POST['_yoone_subscription_periods'])) {
            update_post_meta($post_id, '_yoone_subscription_periods', $_POST['_yoone_subscription_periods']);
        }
        
        // 保存混装设置
        if (isset($_POST['_yoone_bundle_min_quantity'])) {
            update_post_meta($post_id, '_yoone_bundle_min_quantity', intval($_POST['_yoone_bundle_min_quantity']));
        }
        
        if (isset($_POST['_yoone_bundle_discount_type'])) {
            update_post_meta($post_id, '_yoone_bundle_discount_type', sanitize_text_field($_POST['_yoone_bundle_discount_type']));
        }
        
        if (isset($_POST['_yoone_bundle_discount_value'])) {
            update_post_meta($post_id, '_yoone_bundle_discount_value', floatval($_POST['_yoone_bundle_discount_value']));
        }
    }

    /**
     * 添加产品类型
     */
    public function add_product_types($types) {
        $types['yoone_bundle'] = __('混装产品', 'yoone-subscriptions');
        return $types;
    }

    /**
     * 添加订单元框
     */
    public function add_order_meta_boxes() {
        add_meta_box(
            'yoone-subscription-info',
            __('订阅信息', 'yoone-subscriptions'),
            array($this, 'order_subscription_meta_box'),
            'shop_order',
            'side',
            'default'
        );
    }

    /**
     * 订单订阅信息元框
     */
    public function order_subscription_meta_box($post) {
        global $wpdb;
        
        $subscriptions = $wpdb->get_results($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}yoone_subscriptions WHERE parent_order_id = %d",
            $post->ID
        ));
        
        if (empty($subscriptions)) {
            echo '<p>' . __('此订单没有关联的订阅', 'yoone-subscriptions') . '</p>';
            return;
        }
        
        foreach ($subscriptions as $subscription) {
            echo '<div class="subscription-info">';
            echo '<p><strong>' . __('订阅ID:', 'yoone-subscriptions') . '</strong> ' . $subscription->id . '</p>';
            echo '<p><strong>' . __('状态:', 'yoone-subscriptions') . '</strong> ' . Yoone_Frontend::get_subscription_status_label($subscription->status) . '</p>';
            echo '<p><strong>' . __('下次付款:', 'yoone-subscriptions') . '</strong> ' . $subscription->next_payment_date . '</p>';
            echo '<p><a href="' . admin_url('admin.php?page=yoone-subscriptions&action=view&id=' . $subscription->id) . '" class="button">' . __('查看详情', 'yoone-subscriptions') . '</a></p>';
            echo '</div>';
        }
    }

    /**
     * 处理订单状态变化
     */
    public function handle_order_status_change($order_id, $old_status, $new_status, $order) {
        if ($new_status === 'completed') {
            $this->create_subscription_from_order($order);
        }
    }

    /**
     * 从订单创建订阅
     */
    private function create_subscription_from_order($order) {
        foreach ($order->get_items() as $item) {
            $product_id = $item->get_product_id();
            $subscription_enabled = get_post_meta($product_id, '_yoone_subscription_enabled', true);
            
            if ($subscription_enabled === 'yes') {
                $subscription_period = $item->get_meta('_yoone_subscription_period');
                if ($subscription_period) {
                    $this->create_subscription($order, $item, $subscription_period);
                }
            }
        }
    }

    /**
     * 创建订阅
     */
    private function create_subscription($order, $item, $period) {
        global $wpdb;
        
        $subscription_data = array(
            'customer_id' => $order->get_customer_id(),
            'parent_order_id' => $order->get_id(),
            'status' => 'active',
            'billing_period' => $period['period'],
            'billing_interval' => $period['interval'],
            'total' => $item->get_total(),
            'currency' => $order->get_currency(),
            'payment_method' => $order->get_payment_method(),
            'payment_method_title' => $order->get_payment_method_title(),
            'next_payment_date' => $this->calculate_next_payment_date($period),
            'start_date' => current_time('mysql'),
            'created_at' => current_time('mysql'),
        );
        
        $result = $wpdb->insert(
            $wpdb->prefix . 'yoone_subscriptions',
            $subscription_data
        );
        
        if ($result) {
            $subscription_id = $wpdb->insert_id;
            
            // 创建订阅项目
            $wpdb->insert(
                $wpdb->prefix . 'yoone_subscription_items',
                array(
                    'subscription_id' => $subscription_id,
                    'product_id' => $item->get_product_id(),
                    'variation_id' => $item->get_variation_id(),
                    'quantity' => $item->get_quantity(),
                    'price' => $item->get_total() / $item->get_quantity(),
                )
            );
            
            // 记录日志
            Yoone_Logger::info("从订单 {$order->get_id()} 创建订阅 {$subscription_id}");
        }
    }

    /**
     * 计算下次付款日期
     */
    private function calculate_next_payment_date($period) {
        $interval = $period['interval'];
        $period_type = $period['period'];
        
        switch ($period_type) {
            case 'day':
                return date('Y-m-d H:i:s', strtotime("+{$interval} days"));
            case 'week':
                return date('Y-m-d H:i:s', strtotime("+{$interval} weeks"));
            case 'month':
                return date('Y-m-d H:i:s', strtotime("+{$interval} months"));
            case 'year':
                return date('Y-m-d H:i:s', strtotime("+{$interval} years"));
            default:
                return date('Y-m-d H:i:s', strtotime("+1 month"));
        }
    }

    /**
     * 添加产品列
     */
    public function add_product_columns($columns) {
        $columns['yoone_subscription'] = __('订阅', 'yoone-subscriptions');
        $columns['yoone_bundle'] = __('混装', 'yoone-subscriptions');
        return $columns;
    }

    /**
     * 产品列内容
     */
    public function product_column_content($column, $post_id) {
        switch ($column) {
            case 'yoone_subscription':
                $enabled = get_post_meta($post_id, '_yoone_subscription_enabled', true);
                echo $enabled === 'yes' ? '<span class="dashicons dashicons-yes-alt" style="color: green;"></span>' : '—';
                break;
            case 'yoone_bundle':
                $product = wc_get_product($post_id);
                echo $product && $product->get_type() === 'yoone_bundle' ? '<span class="dashicons dashicons-yes-alt" style="color: green;"></span>' : '—';
                break;
        }
    }

    /**
     * 添加设置标签
     */
    public function add_settings_tab($settings_tabs) {
        $settings_tabs['yoone_subscriptions'] = __('Yoone 订阅', 'yoone-subscriptions');
        return $settings_tabs;
    }

    /**
     * 设置标签内容
     */
    public function settings_tab_content() {
        woocommerce_admin_fields($this->get_settings());
    }

    /**
     * 更新设置
     */
    public function update_settings() {
        woocommerce_update_options($this->get_settings());
    }

    /**
     * 获取设置字段
     */
    private function get_settings() {
        return array(
            'section_title' => array(
                'name' => __('Yoone 订阅设置', 'yoone-subscriptions'),
                'type' => 'title',
                'desc' => '',
                'id' => 'yoone_subscriptions_section_title'
            ),
            'subscription_enabled' => array(
                'name' => __('启用订阅功能', 'yoone-subscriptions'),
                'type' => 'checkbox',
                'desc' => __('启用订阅功能', 'yoone-subscriptions'),
                'id' => 'yoone_subscriptions_enabled'
            ),
            'bundle_enabled' => array(
                'name' => __('启用混装功能', 'yoone-subscriptions'),
                'type' => 'checkbox',
                'desc' => __('启用混装产品功能', 'yoone-subscriptions'),
                'id' => 'yoone_bundles_enabled'
            ),
            'section_end' => array(
                'type' => 'sectionend',
                'id' => 'yoone_subscriptions_section_end'
            )
        );
    }

    /**
     * 管理通知
     */
    public function admin_notices() {
        // 检查WooCommerce依赖
        if (!class_exists('WooCommerce')) {
            echo '<div class="notice notice-error"><p>';
            echo __('Yoone Subscriptions 需要 WooCommerce 插件才能正常工作。', 'yoone-subscriptions');
            echo '</p></div>';
        }
    }
}