<?php
defined('ABSPATH') || exit;

trait AKSRT_Admin_Global_Controller_Part_2 {

    public function rest_handle_category_recommend(WP_REST_Request $request): WP_REST_Response {
        if ($request->get_method() === 'GET') {
            $settings = AKSRT_Settings::get_category_recommend_settings();
            return rest_ensure_response(['code' => 'success', 'data' => $settings]);
        }

        $params = $this->get_json_params($request);
        $category_ids = array_map('absint', (array) ($params['category_recommend_category_ids'] ?? []));
        $category_ids = array_filter($category_ids, fn($id) => $id > 0);
        $category_ids = array_values(array_unique($category_ids));

        $settings = [
            'enable_category_recommend'             => !empty($params['enable_category_recommend']),
            'category_recommend_title'              => sanitize_text_field($params['category_recommend_title'] ?? ''),
            'category_recommend_category_ids'       => $category_ids,
            'category_recommend_posts_per_category' => max(1, min(10, (int) ($params['category_recommend_posts_per_category'] ?? 5))),
            'category_recommend_columns'            => max(1, min(4, (int) ($params['category_recommend_columns'] ?? 2))),
            'category_recommend_show_description'   => !empty($params['category_recommend_show_description']),
            'category_recommend_show_dates'         => !empty($params['category_recommend_show_dates']),
            'category_recommend_show_more_link'     => !empty($params['category_recommend_show_more_link']),
        ];
        update_option('aksrt_category_recommend', $settings);
        AKSRT_Settings::flush_category_recommend_cache();

        return rest_ensure_response(['code' => 'success', 'message' => __('Category recommendation settings saved.', 'aksrt')]);
    }

    public function rest_get_categories(WP_REST_Request $request): WP_REST_Response {
        $categories = get_categories([
            'orderby'    => 'count',
            'order'      => 'DESC',
            'hide_empty' => false,
        ]);

        $data = array_map(function ($cat) {
            return [
                'term_id'        => (int) $cat->term_id,
                'name'           => $cat->name,
                'slug'           => $cat->slug,
                'count'          => (int) $cat->count,
                'description'    => $cat->description,
                'cover_id'       => (int) get_term_meta($cat->term_id, 'aksrt_category_cover_id', true),
                'cover_url'      => AKSRT_Settings::get_category_cover_url((int) $cat->term_id),
                'recommend_desc' => (string) get_term_meta($cat->term_id, 'aksrt_category_recommend_desc', true),
            ];
        }, $categories);

        return rest_ensure_response(['code' => 'success', 'data' => array_values($data)]);
    }

    public function rest_search_users(WP_REST_Request $request): WP_REST_Response {
        $search = (string) $request->get_param('search');
        $number = max(1, min(50, (int) $request->get_param('number')));

        $args = [
            'number'  => $number,
            'orderby' => 'display_name',
            'order'   => 'ASC',
            'fields'  => ['ID', 'display_name', 'user_login'],
        ];
        if ($search !== '') {
            $args['search'] = '*' . $search . '*';
            $args['search_columns'] = ['display_name', 'user_login', 'user_email'];
        }

        $users = get_users($args);
        $data = array_map(function ($user) {
            return [
                'id'           => (int) $user->ID,
                'display_name' => $user->display_name,
                'user_login'   => $user->user_login,
            ];
        }, $users);

        return rest_ensure_response(['code' => 'success', 'data' => array_values($data)]);
    }

    public function rest_update_category_meta(WP_REST_Request $request): WP_REST_Response {
        $id = (int) $request->get_param('id');
        $term = get_term($id, 'category');
        if (!$term || is_wp_error($term)) {
            return new WP_REST_Response(['code' => 'error', 'message' => __('Category does not exist.', 'aksrt')], 404);
        }

        $params = $this->get_json_params($request);
        $cover_id = absint($params['cover_id'] ?? 0);
        $recommend_desc = sanitize_textarea_field($params['recommend_desc'] ?? '');

        if ($cover_id > 0) {
            update_term_meta($id, 'aksrt_category_cover_id', $cover_id);
        } else {
            delete_term_meta($id, 'aksrt_category_cover_id');
        }

        if ($recommend_desc !== '') {
            update_term_meta($id, 'aksrt_category_recommend_desc', $recommend_desc);
        } else {
            delete_term_meta($id, 'aksrt_category_recommend_desc');
        }

        AKSRT_Settings::flush_category_recommend_cache();

        return rest_ensure_response(['code' => 'success', 'message' => __('分类元数据已保存', 'aksrt')]);
    }
}