<?php
/**
 * @package Jio
 */

namespace Jio\Admin;

defined('ABSPATH') || exit;

class GlobalController extends ControllerBase {
    use GlobalControllerPart1;
    use GlobalControllerPart2;


    private static $instance = null;

    public static function get_instance(): self {
        if (null === self::$instance) self::$instance = new self();
        return self::$instance;
    }

    /**
     * Register all routes for the global domain.
     */
    public function register_routes(): void {
        register_rest_route(self::API_NAMESPACE, '/mail/test', [
            'methods'             => 'POST',
            'callback'            => [$this, 'rest_test_mail'],
            'permission_callback' => [$this, 'check_permission'],
        ]);

        // Footer Tabbar
        register_rest_route(self::API_NAMESPACE, '/settings/footer-tabbar', [
            'methods'             => ['GET', 'POST'],
            'callback'            => [$this, 'rest_handle_footer_tabbar'],
            'permission_callback' => [$this, 'check_permission'],
        ]);
        register_rest_route(self::API_NAMESPACE, '/settings/footer-tabbar/reorder', [
            'methods'             => 'POST',
            'callback'            => [$this, 'rest_reorder_footer_tabbar'],
            'permission_callback' => [$this, 'check_permission'],
        ]);

        // Floating Buttons
        register_rest_route(self::API_NAMESPACE, '/settings/floating-buttons', [
            'methods'             => ['GET', 'POST'],
            'callback'            => [$this, 'rest_handle_floating_buttons'],
            'permission_callback' => [$this, 'check_permission'],
        ]);

        // Friend Links
        register_rest_route(self::API_NAMESPACE, '/friend-links', [
            'methods'             => ['GET', 'POST'],
            'callback'            => [$this, 'rest_handle_friend_links'],
            'permission_callback' => [$this, 'check_permission'],
        ]);
        register_rest_route(self::API_NAMESPACE, '/friend-links/(?P<id>\d+)', [
            'methods'             => 'DELETE',
            'callback'            => [$this, 'rest_delete_friend_link'],
            'permission_callback' => [$this, 'check_permission'],
        ]);
        register_rest_route(self::API_NAMESPACE, '/friend-links/reorder', [
            'methods'             => 'POST',
            'callback'            => [$this, 'rest_reorder_friend_links'],
            'permission_callback' => [$this, 'check_permission'],
        ]);

        // CMS Features
        register_rest_route(self::API_NAMESPACE, '/settings/cms-features', [
            'methods'             => ['GET', 'POST'],
            'callback'            => [$this, 'rest_handle_cms_features'],
            'permission_callback' => [$this, 'check_permission'],
        ]);

        // Category recommend
        register_rest_route(self::API_NAMESPACE, '/settings/category-recommend', [
            'methods'             => ['GET', 'POST'],
            'callback'            => [$this, 'rest_handle_category_recommend'],
            'permission_callback' => [$this, 'check_permission'],
        ]);

        // Categories list (for admin selectors)
        register_rest_route(self::API_NAMESPACE, '/categories', [
            'methods'             => 'GET',
            'callback'            => [$this, 'rest_get_categories'],
            'permission_callback' => [$this, 'check_permission'],
        ]);

        // Category term meta
        register_rest_route(self::API_NAMESPACE, '/categories/(?P<id>\d+)/meta', [
            'methods'             => 'POST',
            'callback'            => [$this, 'rest_update_category_meta'],
            'permission_callback' => [$this, 'check_permission'],
        ]);

        // Homepage categories (for admin tab editor)
        register_rest_route(self::API_NAMESPACE, '/homepage/categories', [
            'methods'             => 'GET',
            'callback'            => [$this, 'rest_homepage_categories'],
            'permission_callback' => [$this, 'check_permission'],
        ]);

        // User search (for admin user selectors)
        register_rest_route(self::API_NAMESPACE, '/users/search', [
            'methods'             => 'GET',
            'callback'            => [$this, 'rest_search_users'],
            'permission_callback' => [$this, 'check_permission'],
            'args'                => [
                'search' => ['type' => 'string', 'default' => '', 'sanitize_callback' => 'sanitize_text_field'],
                'number' => ['type' => 'integer', 'default' => 20, 'sanitize_callback' => 'absint'],
            ],
        ]);
    }

    public function rest_handle_cms_features(\WP_REST_Request $request): \WP_REST_Response {
        if ($request->get_method() === 'GET') {
            return $this->success(['cms_features' => \Jio\Settings\Settings::get_cms_features()]);
        }

        $params = $this->get_json_params($request);
        $allowed = [
            'resource_cpt_enabled'    => 'bool',
            'search_include_resource' => 'bool',
        ];
        $sanitized = $this->sanitize_fields($params, $allowed);
        $settings = \Jio\Settings\Settings::get_all();
        $settings['cms_features'] = array_merge(
            is_array($settings['cms_features'] ?? null) ? $settings['cms_features'] : [],
            $sanitized
        );
        update_option('jio_settings', $settings);
        \Jio\Settings\Settings::flush_settings_cache();

        return $this->success(['message' => 'CMS 功能已保存', 'cms_features' => \Jio\Settings\Settings::get_cms_features()]);
    }

    public function rest_test_mail(\WP_REST_Request $request): \WP_REST_Response {
        $params = $this->get_json_params($request);
        $to = sanitize_email($params['to'] ?? '');
        if (!is_email($to)) {
            return $this->error(__('请输入有效的邮箱地址', 'jio'));
        }

        $result = \Jio\Settings\Mail::send_test_email($to);
        if (is_wp_error($result)) {
            return $this->error(__('邮件发送失败，详细原因已写入服务器错误日志', 'jio'));
        }
        return $this->success(['message' => '测试邮件已发送']);
    }

    public function rest_homepage_categories(): \WP_REST_Response {
        $data = [];

        $cats = get_categories(['hide_empty' => false, 'orderby' => 'name', 'order' => 'ASC']);
        foreach ($cats as $cat) {
            $data[] = [
                'id'       => (int) $cat->term_id,
                'term_id'  => (int) $cat->term_id,
                'name'     => $cat->name,
                'slug'     => $cat->slug,
                'count'    => (int) $cat->count,
                'parent'   => (int) $cat->parent,
                'taxonomy' => 'category',
            ];
        }

        return $this->success(['data' => $data]);
    }

    public function rest_handle_friend_links(\WP_REST_Request $request): \WP_REST_Response {
        if ($request->get_method() === 'GET') {
            $links = jio_get_friend_links();
            return rest_ensure_response(['code' => 'success', 'data' => $links]);
        }

        $params = $this->get_json_params($request);
        $links = get_option('jio_friend_links', []);
        $new_link = [
            'id'          => uniqid('fl_'),
            'name'        => sanitize_text_field($params['name'] ?? ''),
            'url'         => esc_url_raw($params['url'] ?? ''),
            'logo'        => esc_url_raw($params['logo'] ?? ''),
            'description' => sanitize_textarea_field($params['description'] ?? ''),
            'sort_order'  => (int) ($params['sort_order'] ?? 0),
            'active'      => 1,
        ];
        $links[] = $new_link;
        usort($links, function ($a, $b) {
            return ($a['sort_order'] ?? 0) <=> ($b['sort_order'] ?? 0);
        });
        update_option('jio_friend_links', $links);
        do_action('jio_friend_link_submitted', $new_link);

        return rest_ensure_response(['code' => 'success', 'data' => $new_link, 'message' => __('Friend link added.', 'jio')]);
    }

    public function rest_delete_friend_link(\WP_REST_Request $request): \WP_REST_Response {
        $id = $request->get_param('id');
        $links = get_option('jio_friend_links', []);
        $links = array_filter($links, function ($link) use ($id) {
            return ($link['id'] ?? '') !== $id;
        });
        $links = array_values($links);
        update_option('jio_friend_links', $links);
        return rest_ensure_response(['code' => 'success', 'message' => __('Friend link deleted.', 'jio')]);
    }

    public function rest_reorder_friend_links(\WP_REST_Request $request): \WP_REST_Response {
        $ordered_ids = $request->get_param('ids');
        if (!is_array($ordered_ids)) {
            return new \WP_REST_Response(['code' => 'error', 'message' => __('参数错误', 'jio')], 400);
        }
        $links = get_option('jio_friend_links', []);
        $order_map = array_flip($ordered_ids);
        usort($links, function ($a, $b) use ($order_map) {
            $idx_a = $order_map[($a['id'] ?? '')] ?? 999;
            $idx_b = $order_map[($b['id'] ?? '')] ?? 999;
            return $idx_a <=> $idx_b;
        });
        foreach ($links as $index => &$link) {
            $link['sort_order'] = $index;
        }
        update_option('jio_friend_links', $links);
        return rest_ensure_response(['code' => 'success', 'message' => __('Order saved.', 'jio')]);
    }

    public function rest_handle_footer_tabbar(\WP_REST_Request $request): \WP_REST_Response {
        if ($request->get_method() === 'GET') {
            $settings = class_exists('\Jio\Settings\Settings')
                ? \Jio\Settings\Settings::get_footer_tabbar_settings()
                : ['enabled' => true, 'scroll_hide' => false, 'scroll_down_hide' => true, 'items' => []];
            return rest_ensure_response(['code' => 'success', 'data' => $settings]);
        }

        $params = $this->get_json_params($request);
        $items = isset($params['items']) ? array_map([$this, 'sanitize_tabbar_item'], (array) $params['items']) : [];

        $max_items = max(3, min(7, (int) ($params['max_items'] ?? 5)));
        if (count($items) > $max_items) {
            return new \WP_REST_Response([
                'code'    => 'error',
                'message' => sprintf(__('Footer tabbar supports at most %d items.', 'jio'), $max_items),
            ], 400);
        }

        $tabbar = [
            'enabled'           => !empty($params['enabled']),
            'scroll_hide'       => !empty($params['scroll_hide']),
            'scroll_down_hide'  => !empty($params['scroll_down_hide']),
            'max_items'         => $max_items,
            'icon_size'         => max(16, min(32, (int) ($params['icon_size'] ?? 22))),
            'text_size'         => max(8, min(14, (int) ($params['text_size'] ?? 10))),
            'show_text'         => !empty($params['show_text']),
            'active_color'      => \Jio\Core\Color::sanitize($params['active_color'] ?? '') ?: '#f04494',
            'bg_color'          => \Jio\Core\Color::sanitize($params['bg_color'] ?? '') ?: '',
            'border'            => !empty($params['border']),
            'shadow'            => !empty($params['shadow']),
            'animation'         => !empty($params['animation']),
            'double_click_home' => !empty($params['double_click_home']),
            'badge_dot'         => !empty($params['badge_dot']),
            'items'             => $items,
        ];
        update_option('jio_footer_tabbar', $tabbar);

        if (class_exists('\Jio\Settings\Settings')) {
            \Jio\Settings\Settings::flush_settings_cache();
        }

        return rest_ensure_response(['code' => 'success', 'message' => __('Footer tabbar settings saved.', 'jio')]);
    }

}