<?php
/**
 * @package AKSRT
 */

namespace AKSRT\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 {
        // Email / SMTP
        register_rest_route(self::API_NAMESPACE, '/settings/mail', [
            'methods'             => ['GET', 'POST'],
            'callback'            => [$this, 'rest_handle_mail'],
            'permission_callback' => [$this, 'check_permission'],
        ]);
        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'],
        ]);
        register_rest_route(self::API_NAMESPACE, '/settings/floating-buttons/reorder', [
            'methods'             => 'POST',
            'callback'            => [$this, 'rest_reorder_floating_buttons'],
            'permission_callback' => [$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 tab posts (public)
        register_rest_route(self::API_NAMESPACE, '/homepage/tab-posts', [
            'methods'             => 'GET',
            'callback'            => [$this, 'rest_homepage_tab_posts'],
            'permission_callback' => '__return_true',
            'args'                => [
                'term_id'       => ['type' => 'integer', 'required' => true, 'sanitize_callback' => 'absint'],
                'page'          => ['type' => 'integer', 'default' => 1, 'sanitize_callback' => 'absint'],
                'per_page'      => ['type' => 'integer', 'default' => 10, 'sanitize_callback' => 'absint'],
                'sort'          => ['type' => 'string', 'default' => 'modified', 'sanitize_callback' => 'sanitize_text_field'],
                'page_url'      => ['type' => 'string', 'default' => '', 'sanitize_callback' => 'esc_url_raw'],
                'panel'         => ['type' => 'string', 'default' => 'latest', 'sanitize_callback' => 'sanitize_key'],
                'source'        => ['type' => 'string', 'default' => 'home', 'sanitize_callback' => 'sanitize_key'],
                'tab_orderby'   => ['type' => 'string', 'default' => '', 'sanitize_callback' => 'sanitize_key'],
            ],
        ]);

        // Archive AJAX filter (public) — §2.5/§2.6/§2.7
        register_rest_route(self::API_NAMESPACE, '/archive/posts', [
            'methods'             => 'GET',
            'callback'            => [$this, 'rest_archive_posts'],
            'permission_callback' => '__return_true',
            'args'                => [
                'archive_type'   => ['type' => 'string', 'default' => 'category', 'sanitize_callback' => 'sanitize_key'],
                'term_id'        => ['type' => 'integer', 'default' => 0, 'sanitize_callback' => 'absint'],
				'filter_cat'     => ['type' => 'string', 'default' => '', 'sanitize_callback' => 'sanitize_text_field'],
				'filter_tag'     => ['type' => 'string', 'default' => '', 'sanitize_callback' => 'sanitize_text_field'],
				'sort'           => ['type' => 'string', 'default' => 'date', 'sanitize_callback' => 'sanitize_key'],
				'page'           => ['type' => 'integer', 'default' => 1, 'sanitize_callback' => 'absint'],
			],
        ]);

        // 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' => \AKSRT\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 = \AKSRT\Settings\Settings::get_all();
        $settings['cms_features'] = array_merge(
            is_array($settings['cms_features'] ?? null) ? $settings['cms_features'] : [],
            $sanitized
        );
        update_option('aksrt_settings', $settings);
        \AKSRT\Settings\Settings::flush_settings_cache();

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

    public function rest_handle_mail(\WP_REST_Request $request): \WP_REST_Response {
        $option_key = 'aksrt_mail_config';

        if ($request->get_method() === 'GET') {
            $config = get_option($option_key, [
                'smtp_host' => '',
                'smtp_port' => 465,
                'smtp_user' => '',
                'smtp_pass' => '',
                'smtp_secure' => 'ssl',
                'from_email' => '',
                'from_name' => '',
            ]);
            return $this->success(['data' => $config, 'code' => 'success']);
        }

        $params = $this->get_json_params($request);
        $current = get_option($option_key, []);
        $merged = array_merge(is_array($current) ? $current : [], $params);
        update_option($option_key, $merged);

        return $this->success(['message' => '邮件配置已保存', 'code' => 'success']);
    }

    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', 'aksrt'));
        }

        $sent = wp_mail($to, __('AKSRT 邮件测试', 'aksrt'), __('如果你收到这封邮件，说明 SMTP 配置正确。', 'aksrt'));
        if ($sent) {
            return $this->success(['message' => '测试邮件已发送']);
        }
        return $this->error(__('邮件发送失败，请检查 SMTP 配置', 'aksrt'));
    }

    public function rest_homepage_tab_posts(\WP_REST_Request $request): \WP_REST_Response {
        $term_id     = (int) $request->get_param('term_id');
        $page        = max(1, (int) $request->get_param('page'));
        $per_page    = min(50, max(1, (int) $request->get_param('per_page')));
        $sort        = sanitize_key($request->get_param('sort') ?: 'modified');
        $tab_orderby = sanitize_key($request->get_param('tab_orderby') ?: '');
        $panel       = sanitize_key($request->get_param('panel') ?: 'latest');

        $post_types = function_exists('aksrt_homepage_get_post_types')
            ? aksrt_homepage_get_post_types()
            : ['post'];

        $args = [
            'post_type'           => $post_types,
            'post_status'         => 'publish',
            'posts_per_page'      => $per_page,
            'paged'               => $page,
            'ignore_sticky_posts' => $term_id > 0,
        ];

        if ($term_id > 0) {
            $term = get_term($term_id);
            $taxonomy = ($term && !is_wp_error($term)) ? (string) $term->taxonomy : 'category';
            if ($taxonomy !== 'category') {
                $taxonomy = 'category';
            }
            $args['tax_query'] = [[
                'taxonomy' => $taxonomy,
                'field'    => 'term_id',
                'terms'    => [$term_id],
            ]];
        }

        $exclude_ids = class_exists('\AKSRT\Settings\Settings')
            ? \AKSRT\Settings\Settings::home_exclude_post_ids()
            : [];
        if (!empty($exclude_ids)) {
            $args['post__not_in'] = $exclude_ids;
        }

        if ($panel === 'latest' || $term_id <= 0) {
            $exclude_cat_ids = class_exists('\AKSRT\Settings\Settings')
                ? \AKSRT\Settings\Settings::home_exclude_category_ids()
                : [];
            if (!empty($exclude_cat_ids)) {
                $args['category__not_in'] = $exclude_cat_ids;
            }
        }

        $effective_sort = $tab_orderby !== '' ? $tab_orderby : $sort;
        if (function_exists('aksrt_homepage_apply_named_sort_args')) {
            $args = aksrt_homepage_apply_named_sort_args($args, $effective_sort);
        } else {
            $args['orderby'] = 'date';
            $args['order']   = 'DESC';
        }

        $query = new \WP_Query($args);

		$render_config = aksrt_resolve_post_list_render_config([
			'context' => 'home',
		]);
		$render_config['skip_wrapper'] = true;
		$html = aksrt_render_post_list($render_config, $query, false);

        $has_more = $page < (int) $query->max_num_pages;

        return $this->success([
            'html'     => $html,
            'total'    => (int) $query->found_posts,
            'has_more' => $has_more,
        ]);
    }

	public function rest_archive_posts(\WP_REST_Request $request): \WP_REST_Response {
		$archive_type = sanitize_key((string) ($request->get_param('archive_type') ?: 'category'));
		$archive_type = in_array($archive_type, ['category', 'tag'], true) ? $archive_type : 'category';
		$term_id = absint($request->get_param('term_id'));
		$page = max(1, absint($request->get_param('page')));
		$page_settings = $archive_type === 'tag'
			? \AKSRT\Settings\Settings::get_tag_page_settings()
			: \AKSRT\Settings\Settings::get_category_page_settings();
		$per_page = min(50, max(1, (int) ($page_settings['per_page'] ?? get_option('posts_per_page', 10))));
		$sort = sanitize_key((string) ($request->get_param('sort') ?: 'date'));
		$allowed_sorts = \AKSRT\Settings\Settings::homepage_allowed_sorts();
		if (!in_array($sort, $allowed_sorts, true)) {
			$sort = 'date';
		}

		$args = [
			'post_type'           => 'post',
			'post_status'         => 'publish',
			'posts_per_page'      => $per_page,
			'paged'               => $page,
			'ignore_sticky_posts' => true,
		];
		$tax_query = [];
		if ($term_id > 0) {
			$tax_query[] = [
				'taxonomy' => $archive_type === 'tag' ? 'post_tag' : 'category',
				'field'    => 'term_id',
				'terms'    => [$term_id],
			];
		}
		$filter_cat = absint($request->get_param('filter_cat'));
		$filter_tag = absint($request->get_param('filter_tag'));
		if ($filter_cat > 0) {
			$tax_query[] = ['taxonomy' => 'category', 'field' => 'term_id', 'terms' => [$filter_cat]];
		}
		if ($filter_tag > 0) {
			$tax_query[] = ['taxonomy' => 'post_tag', 'field' => 'term_id', 'terms' => [$filter_tag]];
		}
		if ($tax_query !== []) {
			$args['tax_query'] = $tax_query;
		}
		if (function_exists('aksrt_homepage_apply_named_sort_args')) {
			$args = aksrt_homepage_apply_named_sort_args($args, $sort);
		}

		$query = new \WP_Query($args);
		$render_config = aksrt_resolve_post_list_render_config(['context' => $archive_type]);
		$render_config['skip_wrapper'] = true;
		$html = aksrt_render_post_list($render_config, $query, false);

		return $this->success([
			'html'     => $html,
			'total'    => (int) $query->found_posts,
			'has_more' => $page < (int) $query->max_num_pages,
		]);
	}

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

        $params = $this->get_json_params($request);
        $links = get_option('aksrt_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('aksrt_friend_links', $links);

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

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

    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', 'aksrt')], 400);
        }
        $links = get_option('aksrt_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('aksrt_friend_links', $links);
        return rest_ensure_response(['code' => 'success', 'message' => __('Order saved.', 'aksrt')]);
    }

    public function rest_handle_footer_tabbar(\WP_REST_Request $request): \WP_REST_Response {
        if ($request->get_method() === 'GET') {
            $settings = class_exists('\AKSRT\Settings\Settings')
                ? \AKSRT\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.', 'aksrt'), $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'      => sanitize_hex_color($params['active_color'] ?? '') ?: '#f04494',
            'bg_color'          => sanitize_hex_color($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('aksrt_footer_tabbar', $tabbar);

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

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

}