<?php
/**
 * AKSRT Admin — Page Display Controller
 *
 * Handles REST routes for the "页面&显示" domain:
 * Header components, banners, and homepage visual modules.
 *
 * @package AKSRT
 */

defined('ABSPATH') || exit;

class AKSRT_Admin_Page_Display_Controller extends AKSRT_Admin_Controller_Base {

    private static $instance = null;
    private $admin;

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

    public function set_admin(AKSRT_Admin $admin): void {
        $this->admin = $admin;
    }

    public function register_routes(): void {
        // Banners (generic CRUD — hero, banner kinds)
        register_rest_route(self::API_NAMESPACE, '/banners', [
            'methods'             => 'GET',
            'callback'            => [$this, 'rest_get_banners'],
            'permission_callback' => [$this, 'check_permission'],
        ]);
        register_rest_route(self::API_NAMESPACE, '/banners', [
            'methods'             => 'POST',
            'callback'            => [$this, 'rest_create_banner'],
            'permission_callback' => [$this, 'check_permission'],
        ]);
        register_rest_route(self::API_NAMESPACE, '/banners/(?P<id>[\w-]+)', [
            'methods'             => ['PUT', 'DELETE'],
            'callback'            => [$this, 'rest_handle_banner_item'],
            'permission_callback' => [$this, 'check_permission'],
        ]);
    }

    private function normalize_banner_kind($kind): string {
        return in_array($kind, ['hero', 'banner'], true) ? $kind : 'hero';
    }

    private function get_banner_kind_query(string $kind): array {
        if ('banner' === $kind) {
            return [
                [
                    'key'   => '_aksrt_kind',
                    'value' => 'banner',
                ],
            ];
        }

        return [
            'relation' => 'OR',
            [
                'key'   => '_aksrt_kind',
                'value' => 'hero',
            ],
            [
                'key'     => '_aksrt_kind',
                'compare' => 'NOT EXISTS',
            ],
        ];
    }

    public function rest_get_banners(WP_REST_Request $request): WP_REST_Response {
        $kind = $this->normalize_banner_kind($request->get_param('kind') ?: 'hero');
        $args = [
            'post_type'      => 'aksrt_banner',
            'posts_per_page' => 100,
            'post_status'    => 'any',
            'orderby'        => 'menu_order',
            'order'          => 'ASC',
            'meta_query'     => $this->get_banner_kind_query($kind),
        ];
        $posts = get_posts($args);
        $banners = array_map(function ($post) {
            $layers_json = get_post_meta($post->ID, '_layers', true);
            return [
                'id'                => $post->ID,
                'title'             => $post->post_title,
                'subtitle'          => get_post_meta($post->ID, '_subtitle', true),
                'description'       => get_post_meta($post->ID, '_description', true),
                'image_url'         => get_post_meta($post->ID, '_image_url', true),
                'video_url'         => get_post_meta($post->ID, '_video_url', true),
                'link_url'          => get_post_meta($post->ID, '_link_url', true),
                'link_target'       => get_post_meta($post->ID, '_link_target', true) ?: '_self',
                'text_align'        => get_post_meta($post->ID, '_text_align', true) ?: 'left',
                'device_visibility' => get_post_meta($post->ID, '_device_visibility', true) ?: 'all',
                'enabled'           => get_post_meta($post->ID, '_enabled', true) === '1',
                'show_text'         => get_post_meta($post->ID, '_show_text', true) !== '0',
                'show_meta'         => get_post_meta($post->ID, '_show_meta', true) === '1',
                'kind'              => get_post_meta($post->ID, '_aksrt_kind', true) ?: 'hero',
                'sort_order'        => $post->menu_order,
                'text_size_pc'      => get_post_meta($post->ID, '_text_size_pc', true) ?: '',
                'text_size_m'       => get_post_meta($post->ID, '_text_size_m', true) ?: '',
                'text_parallax'     => get_post_meta($post->ID, '_text_parallax', true) === '1',
                'layers'            => is_string($layers_json) && $layers_json !== '' ? json_decode($layers_json, true) : [],
            ];
        }, $posts);
        return rest_ensure_response(['code' => 'success', 'data' => $banners]);
    }

    public function rest_create_banner(WP_REST_Request $request): WP_REST_Response {
        $params = $this->get_json_params($request);
        $kind = $this->normalize_banner_kind($params['kind'] ?? 'hero');
        $title = sanitize_text_field($params['title'] ?? '');
        $post_id = wp_insert_post([
            'post_title'  => '' !== $title ? $title : ('banner' === $kind ? 'Banner Slide' : 'Hero Slide'),
            'post_type'   => 'aksrt_banner',
            'post_status' => 'publish',
            'menu_order'  => (int) ($params['sort_order'] ?? 0),
        ]);

        if (is_wp_error($post_id)) {
            return new WP_REST_Response(['code' => 'error', 'message' => $post_id->get_error_message()], 400);
        }

        update_post_meta($post_id, '_image_url', esc_url_raw($params['image_url'] ?? ''));
        update_post_meta($post_id, '_link_url', esc_url_raw($params['link_url'] ?? ''));
        update_post_meta($post_id, '_link_target', in_array($params['link_target'] ?? '', ['_self', '_blank'], true) ? $params['link_target'] : '_self');
        update_post_meta($post_id, '_subtitle', sanitize_text_field($params['subtitle'] ?? ''));
        update_post_meta($post_id, '_description', sanitize_textarea_field($params['description'] ?? ''));
        update_post_meta($post_id, '_video_url', esc_url_raw($params['video_url'] ?? ''));
        update_post_meta($post_id, '_text_align', in_array($params['text_align'] ?? '', ['left', 'center', 'right'], true) ? $params['text_align'] : 'left');
        update_post_meta($post_id, '_device_visibility', in_array($params['device_visibility'] ?? '', ['all', 'pc', 'mobile'], true) ? $params['device_visibility'] : 'all');
        update_post_meta($post_id, '_enabled', !array_key_exists('enabled', $params) || !empty($params['enabled']) ? '1' : '0');
        update_post_meta($post_id, '_show_text', !array_key_exists('show_text', $params) || !empty($params['show_text']) ? '1' : '0');
        update_post_meta($post_id, '_show_meta', !empty($params['show_meta']) ? '1' : '0');
        update_post_meta($post_id, '_aksrt_kind', $kind);
        update_post_meta($post_id, '_text_size_pc', sanitize_text_field($params['text_size_pc'] ?? ''));
        update_post_meta($post_id, '_text_size_m', sanitize_text_field($params['text_size_m'] ?? ''));
        update_post_meta($post_id, '_text_parallax', !empty($params['text_parallax']) ? '1' : '0');
        if (isset($params['layers']) && is_array($params['layers'])) {
            update_post_meta($post_id, '_layers', wp_json_encode($params['layers']));
        }

        return rest_ensure_response(['code' => 'success', 'data' => ['id' => $post_id], 'message' => __('幻灯片已创建', 'aksrt')]);
    }

    public function rest_handle_banner_item(WP_REST_Request $request): WP_REST_Response {
        $id = absint($request['id']);
        if (!$id || get_post_type($id) !== 'aksrt_banner') {
            return new WP_REST_Response(['code' => 'not_found', 'message' => __('幻灯片不存在', 'aksrt')], 404);
        }

        if ($request->get_method() === 'DELETE') {
            wp_delete_post($id, true);
            return rest_ensure_response(['code' => 'success', 'message' => __('幻灯片已删除', 'aksrt')]);
        }

        $params = $this->get_json_params($request);
        $kind = $this->normalize_banner_kind($params['kind'] ?? get_post_meta($id, '_aksrt_kind', true) ?: 'hero');
        $title = sanitize_text_field($params['title'] ?? '');
        if ($title === '') {
            $existing = get_the_title($id);
            $title = is_string($existing) && $existing !== ''
                ? $existing
                : ('banner' === $kind ? 'Banner Slide' : 'Hero Slide');
        }

        wp_update_post([
            'ID'         => $id,
            'post_title' => $title,
        ]);

        update_post_meta($id, '_aksrt_kind', $kind);
        update_post_meta($id, '_subtitle', sanitize_text_field($params['subtitle'] ?? ''));
        update_post_meta($id, '_description', sanitize_textarea_field($params['description'] ?? ''));
        update_post_meta($id, '_image_url', esc_url_raw($params['image_url'] ?? ''));
        update_post_meta($id, '_video_url', esc_url_raw($params['video_url'] ?? ''));
        update_post_meta($id, '_link_url', esc_url_raw($params['link_url'] ?? ''));
        update_post_meta($id, '_link_target', in_array($params['link_target'] ?? '', ['_blank', '_self'], true) ? $params['link_target'] : '_self');
        update_post_meta($id, '_text_align', in_array($params['text_align'] ?? '', ['left', 'center', 'right'], true) ? $params['text_align'] : 'left');
        update_post_meta($id, '_device_visibility', in_array($params['device_visibility'] ?? '', ['all', 'pc', 'mobile'], true) ? $params['device_visibility'] : 'all');
        update_post_meta($id, '_enabled', !empty($params['enabled']) ? '1' : '0');
        update_post_meta($id, '_show_text', !isset($params['show_text']) || !empty($params['show_text']) ? '1' : '0');
        update_post_meta($id, '_show_meta', !empty($params['show_meta']) ? '1' : '0');
        update_post_meta($id, '_text_size_pc', sanitize_text_field($params['text_size_pc'] ?? ''));
        update_post_meta($id, '_text_size_m', sanitize_text_field($params['text_size_m'] ?? ''));
        update_post_meta($id, '_text_parallax', !empty($params['text_parallax']) ? '1' : '0');

        if (isset($params['layers']) && is_array($params['layers'])) {
            update_post_meta($id, '_layers', wp_json_encode(array_values($params['layers'])));
        } else {
            delete_post_meta($id, '_layers');
        }

        if (isset($params['sort_order'])) {
            wp_update_post([
                'ID'         => $id,
                'menu_order' => (int) $params['sort_order'],
            ]);
        }

        return rest_ensure_response(['code' => 'success', 'message' => __('幻灯片已更新', 'aksrt')]);
    }
}