<?php
/**
 * 后台管理类
 * 
 * 处理WordPress后台管理功能
 */

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

/**
 * 后台管理类
 */
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_menu'));
        
        // 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_data'));
        
        // 产品类型
        add_filter('product_type_selector', array($this, 'add_product_types'));
        
        // 订单管理
        add_action('add_meta_boxes', array($this, 'add_order_meta_boxes'));
        add_action('woocommerce_admin_order_data_after_billing_address', array($this, 'display_order_subscription_info'));
        
        // 脚本和样式
        add_action('admin_enqueue_scripts', array($this, 'enqueue_admin_scripts'));
        
        // AJAX 处理
        add_action('wp_ajax_yoone_search_products', array($this, 'ajax_search_products'));
        add_action('wp_ajax_yoone_get_bundle_items', array($this, 'ajax_get_bundle_items'));
        add_action('wp_ajax_yoone_save_bundle_items', array($this, 'ajax_save_bundle_items'));
        
        // 列表页面自定义列
        add_filter('manage_product_posts_columns', array($this, 'add_product_columns'));
        add_action('manage_product_posts_custom_column', array($this, 'display_product_columns'), 10, 2);
    }
    
    /**
     * 加载管理脚本
     */
    public function enqueue_admin_scripts($hook) {
        global $post_type;
        
        if ($post_type === 'product' || strpos($hook, 'yoone-subscriptions') !== false) {
            wp_enqueue_script(
                'yoone-admin',
                YOONE_SUBSCRIPTIONS_PLUGIN_URL . 'assets/js/admin.js',
                array('jquery', 'jquery-ui-sortable'),
                YOONE_SUBSCRIPTIONS_VERSION,
                true
            );
            
            wp_enqueue_style(
                'yoone-admin',
                YOONE_SUBSCRIPTIONS_PLUGIN_URL . 'assets/css/admin.css',
                array(),
                YOONE_SUBSCRIPTIONS_VERSION
            );
            
            wp_localize_script('yoone-admin', 'yoone_admin_params', array(
                'ajax_url' => admin_url('admin-ajax.php'),
                'nonce'    => wp_create_nonce('yoone_admin_nonce'),
                'i18n'     => array(
                    'loading'         => __('加载中...', 'yoone-subscriptions'),
                    'error'           => __('发生错误', 'yoone-subscriptions'),
                    'confirm_delete'  => __('确定要删除吗？', 'yoone-subscriptions'),
                    'select_product'  => __('选择产品', 'yoone-subscriptions'),
                    'add_item'        => __('添加项目', 'yoone-subscriptions'),
                    'remove_item'     => __('移除项目', 'yoone-subscriptions'),
                )
            ));
        }
    }
    
    /*
    |--------------------------------------------------------------------------
    | 管理菜单
    |--------------------------------------------------------------------------
    */
    
    /**
     * 添加管理菜单
     */
    public function add_admin_menu() {
        add_menu_page(
            __('Yoone 订阅', 'yoone-subscriptions'),
            __('Yoone 订阅', 'yoone-subscriptions'),
            'manage_woocommerce',
            'yoone-subscriptions',
            array($this, 'subscriptions_page'),
            'dashicons-update',
            56
        );
        
        add_submenu_page(
            'yoone-subscriptions',
            __('所有订阅', 'yoone-subscriptions'),
            __('所有订阅', 'yoone-subscriptions'),
            'manage_woocommerce',
            'yoone-subscriptions',
            array($this, 'subscriptions_page')
        );
        
        add_submenu_page(
            'yoone-subscriptions',
            __('套装管理', 'yoone-subscriptions'),
            __('套装管理', 'yoone-subscriptions'),
            'manage_woocommerce',
            'yoone-bundles',
            array($this, 'bundles_page')
        );
        
        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')
        );
        
        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() {
        $list_table = new Yoone_Subscriptions_List_Table();
        $list_table->prepare_items();
        
        echo '<div class="wrap">';
        echo '<h1>' . __('订阅管理', 'yoone-subscriptions') . '</h1>';
        
        $list_table->display();
        
        echo '</div>';
    }
    
    /**
     * 套装管理页面
     */
    public function bundles_page() {
        $action = isset($_GET['action']) ? $_GET['action'] : 'list';
        
        switch ($action) {
            case 'edit':
            case 'add':
                $this->bundle_edit_page();
                break;
            default:
                $this->bundle_list_page();
                break;
        }
    }
    
    /**
     * 套装列表页面
     */
    private function bundle_list_page() {
        $list_table = new Yoone_Bundles_List_Table();
        $list_table->prepare_items();
        
        echo '<div class="wrap">';
        echo '<h1>' . __('套装管理', 'yoone-subscriptions');
        echo '<a href="' . admin_url('admin.php?page=yoone-bundles&action=add') . '" class="page-title-action">' . __('添加套装', 'yoone-subscriptions') . '</a>';
        echo '</h1>';
        
        $list_table->display();
        
        echo '</div>';
    }
    
    /**
     * 套装编辑页面
     */
    private function bundle_edit_page() {
        $bundle_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
        $bundle = new Yoone_Bundle($bundle_id);
        
        if (isset($_POST['save_bundle'])) {
            $this->save_bundle_data($bundle);
        }
        
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'includes/admin/views/bundle-edit.php';
    }
    
    /**
     * 支付设置页面
     */
    public function payment_settings_page() {
        if (isset($_POST['save_settings'])) {
            $this->save_payment_settings();
        }
        
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'includes/admin/views/payment-settings.php';
    }
    
    /**
     * 报告页面
     */
    public function reports_page() {
        include YOONE_SUBSCRIPTIONS_PLUGIN_PATH . 'includes/admin/views/reports.php';
    }
    
    /*
    |--------------------------------------------------------------------------
    | 产品数据面板
    |--------------------------------------------------------------------------
    */
    
    /**
     * 添加产品数据标签
     */
    public function add_product_data_tabs($tabs) {
        $tabs['yoone_bundle'] = array(
            'label'    => __('套装设置', 'yoone-subscriptions'),
            'target'   => 'yoone_bundle_product_data',
            'class'    => array('show_if_yoone_bundle'),
            'priority' => 25,
        );
        
        $tabs['yoone_subscription'] = array(
            'label'    => __('订阅设置', 'yoone-subscriptions'),
            'target'   => 'yoone_subscription_product_data',
            'class'    => array(),
            'priority' => 26,
        );
        
        return $tabs;
    }
    
    /**
     * 添加产品数据面板
     */
    public function add_product_data_panels() {
        global $post;
        
        // 套装设置面板
        echo '<div id="yoone_bundle_product_data" class="panel woocommerce_options_panel">';
        
        woocommerce_wp_select(array(
            'id'      => '_yoone_bundle_discount_type',
            'label'   => __('折扣类型', 'yoone-subscriptions'),
            'options' => array(
                ''           => __('无折扣', 'yoone-subscriptions'),
                'percentage' => __('百分比折扣', 'yoone-subscriptions'),
                'fixed'      => __('固定金额折扣', 'yoone-subscriptions'),
            ),
        ));
        
        woocommerce_wp_text_input(array(
            'id'          => '_yoone_bundle_discount_value',
            'label'       => __('折扣值', 'yoone-subscriptions'),
            'description' => __('输入折扣值（百分比或固定金额）', 'yoone-subscriptions'),
            'type'        => 'number',
            'custom_attributes' => array(
                'step' => '0.01',
                'min'  => '0',
            ),
        ));
        
        woocommerce_wp_text_input(array(
            'id'          => '_yoone_bundle_min_quantity',
            'label'       => __('最小数量', 'yoone-subscriptions'),
            'description' => __('套装中产品的最小总数量', 'yoone-subscriptions'),
            'type'        => 'number',
            'custom_attributes' => array(
                'min' => '0',
            ),
        ));
        
        woocommerce_wp_text_input(array(
            'id'          => '_yoone_bundle_max_quantity',
            'label'       => __('最大数量', 'yoone-subscriptions'),
            'description' => __('套装中产品的最大总数量（0表示无限制）', 'yoone-subscriptions'),
            'type'        => 'number',
            'custom_attributes' => array(
                'min' => '0',
            ),
        ));
        
        echo '<div class="options_group">';
        echo '<h4>' . __('套装产品', 'yoone-subscriptions') . '</h4>';
        echo '<div id="yoone-bundle-items">';
        echo '<div id="yoone-bundle-items-list"></div>';
        echo '<button type="button" class="button" id="add-bundle-item">' . __('添加产品', 'yoone-subscriptions') . '</button>';
        echo '</div>';
        echo '</div>';
        
        echo '</div>';
        
        // 订阅设置面板
        echo '<div id="yoone_subscription_product_data" class="panel woocommerce_options_panel">';
        
        woocommerce_wp_checkbox(array(
            'id'          => '_yoone_subscription_enabled',
            'label'       => __('启用订阅', 'yoone-subscriptions'),
            'description' => __('将此产品设为订阅产品', 'yoone-subscriptions'),
        ));
        
        woocommerce_wp_select(array(
            'id'      => '_yoone_subscription_period',
            'label'   => __('订阅周期', 'yoone-subscriptions'),
            'options' => array(
                'day'   => __('天', 'yoone-subscriptions'),
                'week'  => __('周', 'yoone-subscriptions'),
                'month' => __('月', 'yoone-subscriptions'),
                'year'  => __('年', 'yoone-subscriptions'),
            ),
            'value'   => get_post_meta($post->ID, '_yoone_subscription_period', true) ?: 'month',
        ));
        
        woocommerce_wp_text_input(array(
            'id'          => '_yoone_subscription_interval',
            'label'       => __('订阅间隔', 'yoone-subscriptions'),
            'description' => __('每隔多少个周期收费一次', 'yoone-subscriptions'),
            'type'        => 'number',
            'value'       => get_post_meta($post->ID, '_yoone_subscription_interval', true) ?: '1',
            'custom_attributes' => array(
                'min' => '1',
            ),
        ));
        
        woocommerce_wp_text_input(array(
            'id'          => '_yoone_subscription_length',
            'label'       => __('订阅长度', 'yoone-subscriptions'),
            'description' => __('订阅持续多少个周期（0表示永久）', 'yoone-subscriptions'),
            'type'        => 'number',
            'value'       => get_post_meta($post->ID, '_yoone_subscription_length', true) ?: '0',
            'custom_attributes' => array(
                'min' => '0',
            ),
        ));
        
        woocommerce_wp_text_input(array(
            'id'          => '_yoone_subscription_trial_length',
            'label'       => __('试用期长度', 'yoone-subscriptions'),
            'description' => __('免费试用期天数（0表示无试用期）', 'yoone-subscriptions'),
            'type'        => 'number',
            'value'       => get_post_meta($post->ID, '_yoone_subscription_trial_length', true) ?: '0',
            'custom_attributes' => array(
                'min' => '0',
            ),
        ));
        
        woocommerce_wp_text_input(array(
            'id'          => '_yoone_subscription_signup_fee',
            'label'       => __('注册费', 'yoone-subscriptions'),
            'description' => __('一次性注册费用', 'yoone-subscriptions'),
            'type'        => 'number',
            'value'       => get_post_meta($post->ID, '_yoone_subscription_signup_fee', true) ?: '0',
            'custom_attributes' => array(
                'step' => '0.01',
                'min'  => '0',
            ),
        ));
        
        echo '</div>';
    }
    
    /**
     * 保存产品数据
     */
    public function save_product_data($post_id) {
        // 套装设置
        $bundle_fields = array(
            '_yoone_bundle_discount_type',
            '_yoone_bundle_discount_value',
            '_yoone_bundle_min_quantity',
            '_yoone_bundle_max_quantity',
        );
        
        foreach ($bundle_fields as $field) {
            if (isset($_POST[$field])) {
                update_post_meta($post_id, $field, sanitize_text_field($_POST[$field]));
            }
        }
        
        // 订阅设置
        $subscription_fields = array(
            '_yoone_subscription_enabled',
            '_yoone_subscription_period',
            '_yoone_subscription_interval',
            '_yoone_subscription_length',
            '_yoone_subscription_trial_length',
            '_yoone_subscription_signup_fee',
        );
        
        foreach ($subscription_fields as $field) {
            if (isset($_POST[$field])) {
                update_post_meta($post_id, $field, sanitize_text_field($_POST[$field]));
            } else {
                delete_post_meta($post_id, $field);
            }
        }
        
        // 如果是套装产品，创建或更新套装记录
        if (isset($_POST['product-type']) && $_POST['product-type'] === 'yoone_bundle') {
            $this->save_bundle_product_data($post_id);
        }
    }
    
    /**
     * 添加产品类型
     */
    public function add_product_types($types) {
        $types['yoone_bundle'] = __('套装产品', 'yoone-subscriptions');
        return $types;
    }
    
    /*
    |--------------------------------------------------------------------------
    | 订单管理
    |--------------------------------------------------------------------------
    */
    
    /**
     * 添加订单元框
     */
    public function add_order_meta_boxes() {
        add_meta_box(
            'yoone-order-subscriptions',
            __('相关订阅', 'yoone-subscriptions'),
            array($this, 'order_subscriptions_meta_box'),
            'shop_order',
            'normal',
            'default'
        );
    }
    
    /**
     * 订单订阅元框
     */
    public function order_subscriptions_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>' . __('此订单没有相关订阅', 'yoone-subscriptions') . '</p>';
            return;
        }
        
        echo '<table class="widefat">';
        echo '<thead>';
        echo '<tr>';
        echo '<th>' . __('订阅ID', 'yoone-subscriptions') . '</th>';
        echo '<th>' . __('状态', 'yoone-subscriptions') . '</th>';
        echo '<th>' . __('金额', 'yoone-subscriptions') . '</th>';
        echo '<th>' . __('下次付款', 'yoone-subscriptions') . '</th>';
        echo '<th>' . __('操作', 'yoone-subscriptions') . '</th>';
        echo '</tr>';
        echo '</thead>';
        echo '<tbody>';
        
        foreach ($subscriptions as $subscription) {
            echo '<tr>';
            echo '<td>#' . $subscription->id . '</td>';
            echo '<td>' . ucfirst($subscription->status) . '</td>';
            echo '<td>' . wc_price($subscription->total) . '</td>';
            echo '<td>' . ($subscription->next_payment_date ? date('Y-m-d', strtotime($subscription->next_payment_date)) : '-') . '</td>';
            echo '<td>';
            echo '<a href="' . admin_url('admin.php?page=yoone-subscriptions&action=edit&id=' . $subscription->id) . '" class="button button-small">' . __('查看', 'yoone-subscriptions') . '</a>';
            echo '</td>';
            echo '</tr>';
        }
        
        echo '</tbody>';
        echo '</table>';
    }
    
    /**
     * 显示订单订阅信息
     */
    public function display_order_subscription_info($order) {
        $has_subscription = false;
        
        foreach ($order->get_items() as $item) {
            $product = $item->get_product();
            if ($product && $product->get_meta('_yoone_subscription_enabled') === 'yes') {
                $has_subscription = true;
                break;
            }
        }
        
        if ($has_subscription) {
            echo '<div class="yoone-order-subscription-notice">';
            echo '<p><strong>' . __('此订单包含订阅产品', 'yoone-subscriptions') . '</strong></p>';
            echo '</div>';
        }
    }
    
    /*
    |--------------------------------------------------------------------------
    | 产品列表自定义列
    |--------------------------------------------------------------------------
    */
    
    /**
     * 添加产品列
     */
    public function add_product_columns($columns) {
        $new_columns = array();
        
        foreach ($columns as $key => $column) {
            $new_columns[$key] = $column;
            
            if ($key === 'product_type') {
                $new_columns['yoone_subscription'] = __('订阅', 'yoone-subscriptions');
                $new_columns['yoone_bundle'] = __('套装', 'yoone-subscriptions');
            }
        }
        
        return $new_columns;
    }
    
    /**
     * 显示产品列内容
     */
    public function display_product_columns($column, $post_id) {
        switch ($column) {
            case 'yoone_subscription':
                $enabled = get_post_meta($post_id, '_yoone_subscription_enabled', true);
                if ($enabled === 'yes') {
                    echo '<span class="dashicons dashicons-yes-alt" style="color: green;"></span>';
                } else {
                    echo '<span class="dashicons dashicons-minus" style="color: #ccc;"></span>';
                }
                break;
                
            case 'yoone_bundle':
                $product = wc_get_product($post_id);
                if ($product && $product->get_type() === 'yoone_bundle') {
                    echo '<span class="dashicons dashicons-products" style="color: blue;"></span>';
                } else {
                    echo '<span class="dashicons dashicons-minus" style="color: #ccc;"></span>';
                }
                break;
        }
    }
    
    /*
    |--------------------------------------------------------------------------
    | AJAX 处理
    |--------------------------------------------------------------------------
    */
    
    /**
     * AJAX 搜索产品
     */
    public function ajax_search_products() {
        check_ajax_referer('yoone_admin_nonce', 'nonce');
        
        $term = sanitize_text_field($_POST['term']);
        
        $products = wc_get_products(array(
            'limit'  => 20,
            'status' => 'publish',
            's'      => $term,
        ));
        
        $results = array();
        
        foreach ($products as $product) {
            $results[] = array(
                'id'   => $product->get_id(),
                'text' => $product->get_name() . ' (#' . $product->get_id() . ')',
                'price' => $product->get_price(),
            );
        }
        
        wp_send_json($results);
    }
    
    /**
     * AJAX 获取套装项目
     */
    public function ajax_get_bundle_items() {
        check_ajax_referer('yoone_admin_nonce', 'nonce');
        
        $product_id = intval($_POST['product_id']);
        
        $bundle = new Yoone_Bundle();
        $bundle_data = $bundle->get_bundle_by_product_id($product_id);
        
        if ($bundle_data) {
            $items = $bundle->get_bundle_items($bundle_data['id']);
            wp_send_json_success($items);
        } else {
            wp_send_json_success(array());
        }
    }
    
    /**
     * AJAX 保存套装项目
     */
    public function ajax_save_bundle_items() {
        check_ajax_referer('yoone_admin_nonce', 'nonce');
        
        $product_id = intval($_POST['product_id']);
        $items = isset($_POST['items']) ? $_POST['items'] : array();
        
        if (!$product_id) {
            wp_send_json_error(__('无效的产品ID', 'yoone-subscriptions'));
        }
        
        // 获取或创建套装
        $bundle = new Yoone_Bundle();
        $bundle_data = $bundle->get_bundle_by_product_id($product_id);
        
        if ($bundle_data) {
            $bundle = new Yoone_Bundle($bundle_data['id']);
        } else {
            $bundle->set_product_id($product_id);
            $bundle->set_name(get_the_title($product_id));
            $bundle->set_status('active');
            $bundle->save();
        }
        
        // 清除现有项目
        $bundle->clear_items();
        
        // 添加新项目
        foreach ($items as $index => $item) {
            $bundle->add_item(
                intval($item['product_id']),
                intval($item['quantity']),
                floatval($item['discount']),
                $index
            );
        }
        
        wp_send_json_success(__('套装项目已保存', 'yoone-subscriptions'));
    }
    
    /*
    |--------------------------------------------------------------------------
    | 辅助方法
    |--------------------------------------------------------------------------
    */
    
    /**
     * 保存套装产品数据
     */
    private function save_bundle_product_data($product_id) {
        $bundle = new Yoone_Bundle();
        $bundle_data = $bundle->get_bundle_by_product_id($product_id);
        
        if ($bundle_data) {
            $bundle = new Yoone_Bundle($bundle_data['id']);
        } else {
            $bundle->set_product_id($product_id);
            $bundle->set_name(get_the_title($product_id));
        }
        
        // 更新套装设置
        $bundle->set_discount_type(sanitize_text_field($_POST['_yoone_bundle_discount_type'] ?? ''));
        $bundle->set_discount_value(floatval($_POST['_yoone_bundle_discount_value'] ?? 0));
        $bundle->set_min_quantity(intval($_POST['_yoone_bundle_min_quantity'] ?? 0));
        $bundle->set_max_quantity(intval($_POST['_yoone_bundle_max_quantity'] ?? 0));
        $bundle->set_status('active');
        
        $bundle->save();
    }
    
    /**
     * 保存套装数据
     */
    private function save_bundle_data($bundle) {
        if (!wp_verify_nonce($_POST['yoone_bundle_nonce'], 'save_bundle')) {
            return;
        }
        
        $bundle->set_name(sanitize_text_field($_POST['bundle_name']));
        $bundle->set_description(sanitize_textarea_field($_POST['bundle_description']));
        $bundle->set_discount_type(sanitize_text_field($_POST['discount_type']));
        $bundle->set_discount_value(floatval($_POST['discount_value']));
        $bundle->set_min_quantity(intval($_POST['min_quantity']));
        $bundle->set_max_quantity(intval($_POST['max_quantity']));
        $bundle->set_status(sanitize_text_field($_POST['status']));
        
        $bundle->save();
        
        // 保存套装项目
        if (isset($_POST['bundle_items'])) {
            $bundle->clear_items();
            
            foreach ($_POST['bundle_items'] as $index => $item) {
                $bundle->add_item(
                    intval($item['product_id']),
                    intval($item['quantity']),
                    floatval($item['discount']),
                    $index
                );
            }
        }
        
        wp_redirect(admin_url('admin.php?page=yoone-bundles&message=saved'));
        exit;
    }
    
    /**
     * 保存支付设置
     */
    private function save_payment_settings() {
        if (!wp_verify_nonce($_POST['yoone_payment_nonce'], 'save_payment_settings')) {
            return;
        }
        
        $settings = array(
            'moneris_enabled'    => sanitize_text_field($_POST['moneris_enabled'] ?? ''),
            'moneris_testmode'   => sanitize_text_field($_POST['moneris_testmode'] ?? ''),
            'moneris_store_id'   => sanitize_text_field($_POST['moneris_store_id'] ?? ''),
            'moneris_api_token'  => sanitize_text_field($_POST['moneris_api_token'] ?? ''),
            'moneris_country'    => sanitize_text_field($_POST['moneris_country'] ?? 'CA'),
        );
        
        foreach ($settings as $key => $value) {
            update_option('yoone_' . $key, $value);
        }
        
        wp_redirect(admin_url('admin.php?page=yoone-payment-settings&message=saved'));
        exit;
    }
}