<?php
/**
 * AJAX处理类
 *
 * @package YooneSubscriptions
 */

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

/**
 * Yoone_Ajax类
 * 处理所有AJAX请求
 */
class Yoone_Ajax {

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

    /**
     * 初始化钩子
     */
    private function init_hooks() {
        // 前端AJAX钩子
        add_action('wp_ajax_yoone_calculate_bundle_price', array($this, 'calculate_bundle_price'));
        add_action('wp_ajax_nopriv_yoone_calculate_bundle_price', array($this, 'calculate_bundle_price'));
        
        add_action('wp_ajax_yoone_add_bundle_to_cart', array($this, 'add_bundle_to_cart'));
        add_action('wp_ajax_nopriv_yoone_add_bundle_to_cart', array($this, 'add_bundle_to_cart'));
        
        add_action('wp_ajax_yoone_update_subscription', array($this, 'update_subscription'));
        add_action('wp_ajax_yoone_cancel_subscription', array($this, 'cancel_subscription'));
        add_action('wp_ajax_yoone_pause_subscription', array($this, 'pause_subscription'));
        add_action('wp_ajax_yoone_resume_subscription', array($this, 'resume_subscription'));

        // 后端AJAX钩子
        add_action('wp_ajax_yoone_search_products', array($this, 'search_products'));
        add_action('wp_ajax_yoone_add_bundle_item', array($this, 'add_bundle_item'));
        add_action('wp_ajax_yoone_remove_bundle_item', array($this, 'remove_bundle_item'));
        add_action('wp_ajax_yoone_test_moneris_connection', array($this, 'test_moneris_connection'));
    }

    /**
     * 计算混装价格
     */
    public function calculate_bundle_price() {
        check_ajax_referer('yoone_frontend_nonce', 'nonce');

        $product_id = intval($_POST['product_id']);
        $quantities = isset($_POST['quantities']) ? array_map('intval', $_POST['quantities']) : array();

        if (!$product_id) {
            wp_send_json_error('无效的产品ID');
        }

        $bundle = new Yoone_Bundle();
        $bundle_data = $bundle->get_bundle_by_product_id($product_id);

        if (!$bundle_data) {
            wp_send_json_error('未找到混装数据');
        }

        $total_price = $bundle->calculate_bundle_price($product_id, $quantities);

        wp_send_json_success(array(
            'total_price' => $total_price,
            'formatted_price' => wc_price($total_price)
        ));
    }

    /**
     * 添加混装到购物车
     */
    public function add_bundle_to_cart() {
        check_ajax_referer('yoone_frontend_nonce', 'nonce');

        $product_id = intval($_POST['product_id']);
        $quantities = isset($_POST['quantities']) ? array_map('intval', $_POST['quantities']) : array();

        if (!$product_id) {
            wp_send_json_error('无效的产品ID');
        }

        $bundle = new Yoone_Bundle();
        $bundle_data = $bundle->get_bundle_by_product_id($product_id);

        if (!$bundle_data) {
            wp_send_json_error('未找到混装数据');
        }

        // 添加混装到购物车
        $cart_item_key = WC()->cart->add_to_cart($product_id, 1, 0, array(), array(
            'yoone_bundle' => true,
            'yoone_bundle_items' => $quantities
        ));

        if ($cart_item_key) {
            wp_send_json_success(array(
                'message' => '混装产品已添加到购物车',
                'cart_count' => WC()->cart->get_cart_contents_count()
            ));
        } else {
            wp_send_json_error('添加到购物车失败');
        }
    }

    /**
     * 更新订阅
     */
    public function update_subscription() {
        check_ajax_referer('yoone_frontend_nonce', 'nonce');

        if (!is_user_logged_in()) {
            wp_send_json_error('请先登录');
        }

        $subscription_id = intval($_POST['subscription_id']);
        $action = sanitize_text_field($_POST['action_type']);

        if (!$subscription_id) {
            wp_send_json_error('无效的订阅ID');
        }

        $subscription = new Yoone_Subscription($subscription_id);

        if (!$subscription->get_id() || $subscription->get_customer_id() !== get_current_user_id()) {
            wp_send_json_error('订阅不存在或无权限');
        }

        $result = false;
        $message = '';

        switch ($action) {
            case 'pause':
                $result = $subscription->pause();
                $message = $result ? '订阅已暂停' : '暂停订阅失败';
                break;
            case 'resume':
                $result = $subscription->resume();
                $message = $result ? '订阅已恢复' : '恢复订阅失败';
                break;
            case 'cancel':
                $result = $subscription->cancel();
                $message = $result ? '订阅已取消' : '取消订阅失败';
                break;
            default:
                wp_send_json_error('无效的操作');
        }

        if ($result) {
            wp_send_json_success(array(
                'message' => $message,
                'status' => $subscription->get_status()
            ));
        } else {
            wp_send_json_error($message);
        }
    }

    /**
     * 取消订阅
     */
    public function cancel_subscription() {
        check_ajax_referer('yoone_frontend_nonce', 'nonce');

        if (!is_user_logged_in()) {
            wp_send_json_error('请先登录');
        }

        $subscription_id = intval($_POST['subscription_id']);
        $reason = sanitize_textarea_field($_POST['reason']);

        if (!$subscription_id) {
            wp_send_json_error('无效的订阅ID');
        }

        $subscription = new Yoone_Subscription($subscription_id);

        if (!$subscription->get_id() || $subscription->get_customer_id() !== get_current_user_id()) {
            wp_send_json_error('订阅不存在或无权限');
        }

        $result = $subscription->cancel($reason);

        if ($result) {
            wp_send_json_success(array(
                'message' => '订阅已成功取消',
                'status' => $subscription->get_status()
            ));
        } else {
            wp_send_json_error('取消订阅失败');
        }
    }

    /**
     * 暂停订阅
     */
    public function pause_subscription() {
        check_ajax_referer('yoone_frontend_nonce', 'nonce');

        if (!is_user_logged_in()) {
            wp_send_json_error('请先登录');
        }

        $subscription_id = intval($_POST['subscription_id']);

        if (!$subscription_id) {
            wp_send_json_error('无效的订阅ID');
        }

        $subscription = new Yoone_Subscription($subscription_id);

        if (!$subscription->get_id() || $subscription->get_customer_id() !== get_current_user_id()) {
            wp_send_json_error('订阅不存在或无权限');
        }

        $result = $subscription->pause();

        if ($result) {
            wp_send_json_success(array(
                'message' => '订阅已暂停',
                'status' => $subscription->get_status()
            ));
        } else {
            wp_send_json_error('暂停订阅失败');
        }
    }

    /**
     * 恢复订阅
     */
    public function resume_subscription() {
        check_ajax_referer('yoone_frontend_nonce', 'nonce');

        if (!is_user_logged_in()) {
            wp_send_json_error('请先登录');
        }

        $subscription_id = intval($_POST['subscription_id']);

        if (!$subscription_id) {
            wp_send_json_error('无效的订阅ID');
        }

        $subscription = new Yoone_Subscription($subscription_id);

        if (!$subscription->get_id() || $subscription->get_customer_id() !== get_current_user_id()) {
            wp_send_json_error('订阅不存在或无权限');
        }

        $result = $subscription->resume();

        if ($result) {
            wp_send_json_success(array(
                'message' => '订阅已恢复',
                'status' => $subscription->get_status()
            ));
        } else {
            wp_send_json_error('恢复订阅失败');
        }
    }

    /**
     * 搜索产品（后台使用）
     */
    public function search_products() {
        check_ajax_referer('yoone_admin_nonce', 'nonce');

        if (!current_user_can('manage_woocommerce')) {
            wp_send_json_error('权限不足');
        }

        $term = sanitize_text_field($_POST['term']);

        if (strlen($term) < 2) {
            wp_send_json_error('搜索词太短');
        }

        $products = wc_get_products(array(
            'limit' => 20,
            'status' => 'publish',
            's' => $term,
            'return' => 'objects'
        ));

        $results = array();
        foreach ($products as $product) {
            $results[] = array(
                'id' => $product->get_id(),
                'text' => $product->get_name() . ' (#' . $product->get_id() . ')',
                'price' => $product->get_price()
            );
        }

        wp_send_json_success($results);
    }

    /**
     * 添加混装商品项
     */
    public function add_bundle_item() {
        check_ajax_referer('yoone_admin_nonce', 'nonce');

        if (!current_user_can('manage_woocommerce')) {
            wp_send_json_error('权限不足');
        }

        $bundle_id = intval($_POST['bundle_id']);
        $product_id = intval($_POST['product_id']);
        $quantity = intval($_POST['quantity']);

        if (!$bundle_id || !$product_id || !$quantity) {
            wp_send_json_error('参数无效');
        }

        $bundle = new Yoone_Bundle($bundle_id);
        $result = $bundle->add_item($product_id, $quantity);

        if ($result) {
            wp_send_json_success('商品已添加到混装');
        } else {
            wp_send_json_error('添加失败');
        }
    }

    /**
     * 移除混装商品项
     */
    public function remove_bundle_item() {
        check_ajax_referer('yoone_admin_nonce', 'nonce');

        if (!current_user_can('manage_woocommerce')) {
            wp_send_json_error('权限不足');
        }

        $item_id = intval($_POST['item_id']);

        if (!$item_id) {
            wp_send_json_error('参数无效');
        }

        $bundle = new Yoone_Bundle();
        $result = $bundle->remove_item($item_id);

        if ($result) {
            wp_send_json_success('商品已从混装中移除');
        } else {
            wp_send_json_error('移除失败');
        }
    }

    /**
     * 测试 Moneris 连接
     */
    public function test_moneris_connection() {
        check_ajax_referer('yoone_admin_nonce', 'nonce');

        if (!current_user_can('manage_woocommerce')) {
            wp_send_json_error('权限不足');
        }

        $store_id = sanitize_text_field($_POST['store_id']);
        $api_token = sanitize_text_field($_POST['api_token']);
        $testmode = isset($_POST['testmode']) && $_POST['testmode'] === 'yes';

        if (!$store_id || !$api_token) {
            wp_send_json_error('Store ID 和 API Token 不能为空');
        }

        $gateway = new Yoone_Moneris_Gateway();
        $result = $gateway->test_connection($store_id, $api_token, $testmode);

        if ($result) {
            wp_send_json_success('Moneris 连接测试成功');
        } else {
            wp_send_json_error('Moneris 连接测试失败');
        }
    }
}