<?php
/**
 * Public widget list REST endpoints.
 *
 * @package AKSRT
 */

namespace AKSRT\Core;

defined('ABSPATH') || exit;

class WidgetAjax {
	private static $instance = null;

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

	public function init(): void {
		add_action('rest_api_init', [$this, 'register_routes']);
	}

	public function register_routes(): void {
		$routes = [
				'/widgets/posts'              => 'rest_main_posts',
				'/widgets/tab-posts'          => 'rest_tab_posts',
				'/widgets/paid-posts'         => 'rest_paid_posts',
				'/widgets/category-tabs'      => 'rest_category_tabs',
				'/widgets/category-block'     => 'rest_category_block',
				'/widgets/category-recommend' => 'rest_category_recommend',
				'/widgets/hot-posts'          => 'rest_hot_posts',
				'/widgets/oneline-posts'      => 'rest_oneline_posts',
				'/widgets/recent-comments'    => 'rest_recent_comments',
				'/widgets/user-lists'         => 'rest_user_lists',
				'/widgets/forum-topics'       => 'rest_forum_topics',
				'/widgets/forum-terms'        => 'rest_forum_terms',
				'/widgets/forum-boards'       => 'rest_forum_boards',
				'/widgets/tag-cloud'          => 'rest_tag_cloud',
				'/widgets/categories'         => 'rest_categories',
				'/widgets/term-cards'         => 'rest_term_cards',
				'/widgets/term-aggregation'   => 'rest_term_aggregation',
			];
		foreach ($routes as $path => $cb) {
			register_rest_route('aksrt/v1', $path, [
				'methods'             => 'GET',
				'callback'            => [$this, $cb],
				'permission_callback' => '__return_true',
			]);
		}
	}

	public function rest_main_posts(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\WidgetMainPosts')) {
			return $this->fail();
		}
		$instance = [
			'count'       => max(1, min(30, (int) ($request->get_param('count') ?? 6))),
			'orderby'     => sanitize_key((string) ($request->get_param('orderby') ?? 'date')),
			'cat'         => max(0, (int) ($request->get_param('cat') ?? 0)),
			'limit_day'   => max(0, (int) ($request->get_param('limit_day') ?? 0)),
			'topics'      => sanitize_text_field((string) ($request->get_param('topics') ?? '')),
			'pay_type'    => sanitize_key((string) ($request->get_param('pay_type') ?? '')),
			'style'       => sanitize_key((string) ($request->get_param('style') ?? 'list')),
			'show_thumb'  => $request->get_param('show_thumb') === null ? 1 : (int) $request->get_param('show_thumb'),
			'show_meta'   => $request->get_param('show_meta') === null ? 1 : (int) $request->get_param('show_meta'),
			'show_number' => (int) ($request->get_param('show_number') ?? 0),
			'paginate'    => in_array(sanitize_key((string) ($request->get_param('paginate') ?? 'ajax')), ['none','ajax','number'], true) ? sanitize_key((string) ($request->get_param('paginate') ?? 'ajax')) : 'ajax',
		];
		$page = max(1, (int) ($request->get_param('page') ?? $request->get_param('paged') ?? 1));
		return $this->payload(\AKSRT\Widgets\WidgetMainPosts::query_payload($instance, $page), $page);
	}

	public function rest_tab_posts(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\TabPostsWidget')) {
			return $this->fail();
		}
		$default_count = max(1, min(20, (int) ($request->get_param('count') ?? 5)));
		$style = sanitize_key((string) ($request->get_param('style') ?? 'mini'));
		if (!in_array($style, ['list', 'card', 'mini'], true)) {
			$style = 'mini';
		}
		$paginate = sanitize_key((string) ($request->get_param('paginate') ?? 'none'));
		if (!in_array($paginate, ['none', 'ajax', 'number'], true)) {
			$paginate = 'none';
		}
		$page = max(1, (int) ($request->get_param('page') ?? 1));
		$tab = [
			'title'       => '',
			'category_id' => max(0, (int) ($request->get_param('cat') ?? $request->get_param('category_id') ?? 0)),
			'orderby'     => sanitize_key((string) ($request->get_param('orderby') ?? 'date')),
			'count'       => max(0, min(20, (int) ($request->get_param('tab_count') ?? 0))),
			'enabled'     => true,
		];
		$opts = [
			'style'       => $style,
			'paginate'    => $paginate,
			'show_thumb'  => $request->get_param('show_thumb') === null ? 1 : (int) $request->get_param('show_thumb'),
			'show_meta'   => $request->get_param('show_meta') === null ? 1 : (int) $request->get_param('show_meta'),
			'show_number' => (int) ($request->get_param('show_number') ?? 0),
		];
		$payload = \AKSRT\Widgets\TabPostsWidget::render_tab_payload($tab, $default_count, $opts, $page);
		$html = (string) ($payload['html'] ?? '');
		if ($html === '') {
			$html = function_exists('aksrt_get_ajax_null')
				? aksrt_get_ajax_null(__('暂无文章', 'aksrt'))
				: '<p class="widget-empty ajax-item">' . esc_html__('暂无文章', 'aksrt') . '</p>';
		} else {
			$html = '<div class="widget-tab-posts__list widget-tab-posts__list--' . esc_attr($style) . ' aksrt-main-posts style-' . esc_attr($style) . '">' . $html . '</div>';
		}
		return new \WP_REST_Response([
			'success'       => true,
			'html'          => $html,
			'paginate_html' => (string) ($payload['paginate_html'] ?? ''),
			'has_more'      => !empty($payload['has_more']),
			'page'          => (int) ($payload['page'] ?? $page),
			'max_pages'     => (int) ($payload['max_pages'] ?? 1),
			'total'         => (int) ($payload['total'] ?? 0),
		], 200);
	}

	public function rest_paid_posts(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\WidgetPaidPosts')) {
			return $this->fail();
		}
		$instance = [
			'count'    => max(1, min(20, (int) ($request->get_param('count') ?? 6))),
			'orderby'  => sanitize_key((string) ($request->get_param('orderby') ?? 'date')),
			'paginate' => sanitize_key((string) ($request->get_param('paginate') ?? 'ajax')),
		];
		$page = max(1, (int) ($request->get_param('page') ?? $request->get_param('paged') ?? 1));
		return $this->payload(\AKSRT\Widgets\WidgetPaidPosts::query_payload($instance, $page), $page);
	}

	public function rest_category_tabs(\WP_REST_Request $request) {
		$cat = max(0, (int) ($request->get_param('cat') ?? 0));
		$count = max(1, min(12, (int) ($request->get_param('count') ?? 6)));
		$layout = sanitize_key((string) ($request->get_param('layout') ?? 'card'));
		$columns = max(1, min(4, (int) ($request->get_param('columns') ?? 3)));
		$context = sanitize_key((string) ($request->get_param('context') ?? 'homepage'));
		if ($cat <= 0) {
			return new \WP_REST_Response(['success' => true, 'html' => ''], 200);
		}
		$post_types = function_exists('aksrt_home_widget_post_types') ? aksrt_home_widget_post_types() : ['post'];
		$query = new \WP_Query([
			'post_type'           => $post_types,
			'post_status'         => 'publish',
			'posts_per_page'      => $count,
			'ignore_sticky_posts' => true,
			'no_found_rows'       => true,
			'cat'                 => $cat,
		]);
		ob_start();
		if (function_exists('aksrt_home_widget_render_post_grid')) {
			aksrt_home_widget_render_post_grid($query, $layout, $columns, $context);
		} elseif ($query->have_posts()) {
			if (function_exists('aksrt_render_mini_list')) {
				echo '<div class="widget-tab-posts__list widget-tab-posts__list--mini">';
				aksrt_render_mini_list($query, ['context' => 'widget', 'show_thumb' => true]);
				echo '</div>';
			} else {
				echo '<ul class="widget-tab-posts__list">';
				while ($query->have_posts()) {
					$query->the_post();
					echo '<li><a href="' . esc_url(get_permalink()) . '">' . esc_html(get_the_title()) . '</a></li>';
				}
				echo '</ul>';
			}
		} else {
			echo function_exists('aksrt_get_ajax_null')
				? aksrt_get_ajax_null(__('暂无文章', 'aksrt')) // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
				: '<p class="widget-empty ajax-item">' . esc_html__('暂无文章', 'aksrt') . '</p>';
		}
		wp_reset_postdata();
		$html = (string) ob_get_clean();
		if ($html === '') {
			$html = function_exists('aksrt_get_ajax_null')
				? aksrt_get_ajax_null(__('暂无文章', 'aksrt'))
				: '<p class="widget-empty ajax-item">' . esc_html__('暂无文章', 'aksrt') . '</p>';
		}
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}

	public function rest_hot_posts(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\HotPostsWidget')) {
			return $this->fail();
		}
		$instance = [
			'count'      => max(1, min(20, (int) ($request->get_param('count') ?? 5))),
			'order_by'   => sanitize_key((string) ($request->get_param('order_by') ?? 'views')),
			'days'       => max(0, (int) ($request->get_param('days') ?? 30)),
			'show_thumb' => $request->get_param('show_thumb') === null ? 1 : (int) $request->get_param('show_thumb'),
			'paginate'   => sanitize_key((string) ($request->get_param('paginate') ?? 'ajax')),
		];
		$page = max(1, (int) ($request->get_param('page') ?? 1));
		return $this->payload(\AKSRT\Widgets\HotPostsWidget::query_payload($instance, $page), $page);
	}

	public function rest_oneline_posts(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\WidgetOnelinePosts')) {
			return $this->fail();
		}
		$instance = [
			'count'     => max(1, min(20, (int) ($request->get_param('count') ?? 8))),
			'style'     => sanitize_key((string) ($request->get_param('style') ?? 'card')),
			'orderby'   => sanitize_key((string) ($request->get_param('orderby') ?? 'date')),
			'cat'       => max(0, (int) ($request->get_param('cat') ?? 0)),
			'limit_day' => max(0, (int) ($request->get_param('limit_day') ?? 0)),
			'topics'    => sanitize_text_field((string) ($request->get_param('topics') ?? '')),
			'pay_type'  => sanitize_key((string) ($request->get_param('pay_type') ?? '')),
		];
		$html = \AKSRT\Widgets\WidgetOnelinePosts::render_html($instance);
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}

	public function rest_recent_comments(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\RecentCommentsWidget')) {
			return $this->fail();
		}
		$instance = [
			'count'       => max(1, min(20, (int) ($request->get_param('count') ?? 5))),
			'show_avatar' => $request->get_param('show_avatar') === null ? 1 : (int) $request->get_param('show_avatar'),
			'outpost'     => sanitize_text_field((string) ($request->get_param('outpost') ?? '')),
			'outer'       => sanitize_text_field((string) ($request->get_param('outer') ?? '')),
		];
		$html = \AKSRT\Widgets\RecentCommentsWidget::render_html($instance);
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}

	public function rest_user_lists(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\WidgetUserLists')) {
			return $this->fail();
		}
		$instance = [
			'number'   => max(1, min(50, (int) ($request->get_param('number') ?? 8))),
			'orderby'  => sanitize_key((string) ($request->get_param('orderby') ?? 'user_registered')),
			'order'    => sanitize_key((string) ($request->get_param('order') ?? 'DESC')),
			'include'  => sanitize_text_field((string) ($request->get_param('include') ?? '')),
			'exclude'  => sanitize_text_field((string) ($request->get_param('exclude') ?? '')),
			'hide_box' => (int) ($request->get_param('hide_box') ?? 0),
			'blur_bg'  => (int) ($request->get_param('blur_bg') ?? 0),
		];
		$html = \AKSRT\Widgets\WidgetUserLists::render_html($instance);
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}

	public function rest_forum_topics(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\WidgetForumHotTopics')) {
			return $this->fail();
		}
		$style = sanitize_key((string) ($request->get_param('style') ?? 'mini'));
		if (!in_array($style, ['mini', 'rank'], true)) {
			$style = 'mini';
		}
		$instance = [
			'count'    => max(1, min(20, (int) ($request->get_param('count') ?? 5))),
			'period'   => sanitize_key((string) ($request->get_param('period') ?? 'week')),
			'orderby'  => sanitize_key((string) ($request->get_param('orderby') ?? 'views')),
			'style'    => $style,
			'plate'    => max(0, (int) ($request->get_param('plate') ?? $request->get_param('plate_id') ?? 0)),
			'paginate' => sanitize_key((string) ($request->get_param('paginate') ?? 'ajax')),
		];
		$page = max(1, (int) ($request->get_param('page') ?? 1));
		return $this->payload(\AKSRT\Widgets\WidgetForumHotTopics::query_payload($instance, $page), $page);
	}

	public function rest_forum_terms(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\WidgetForumTopicTerms')) {
			return $this->fail();
		}
		$instance = [
			'number'     => max(1, min(40, (int) ($request->get_param('number') ?? 12))),
			'orderby'    => sanitize_key((string) ($request->get_param('orderby') ?? 'count')),
			'hide_empty' => $request->get_param('hide_empty') === null ? 1 : (int) $request->get_param('hide_empty'),
			'include'    => sanitize_text_field((string) ($request->get_param('include') ?? '')),
			'style'      => sanitize_key((string) ($request->get_param('style') ?? 'mini')),
		];
		$html = \AKSRT\Widgets\WidgetForumTopicTerms::render_html($instance);
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}


	public function rest_category_block(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\CategoryBlockWidget')) {
			return $this->fail();
		}
		$instance = [
			'category_id' => max(0, (int) ($request->get_param('cat') ?? $request->get_param('category_id') ?? 0)),
			'count'       => max(1, min(12, (int) ($request->get_param('count') ?? 6))),
			'columns'     => max(1, min(4, (int) ($request->get_param('columns') ?? 3))),
			'layout'      => sanitize_key((string) ($request->get_param('layout') ?? 'card')),
			'paginate'    => sanitize_key((string) ($request->get_param('paginate') ?? 'ajax')),
		];
		$context = sanitize_key((string) ($request->get_param('context') ?? 'homepage'));
		$page = max(1, (int) ($request->get_param('page') ?? 1));
		return $this->payload(\AKSRT\Widgets\CategoryBlockWidget::query_payload($instance, $page, $context), $page);
	}

	public function rest_category_recommend(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\CategoryRecommendWidget')) {
			return $this->fail();
		}
		$raw_ids = $request->get_param('category_ids');
		if (is_string($raw_ids)) {
			$raw_ids = array_filter(array_map('intval', preg_split('/[\s,]+/', $raw_ids) ?: []));
		}
		$instance = [
			'category_ids'       => is_array($raw_ids) ? $raw_ids : [],
			'posts_per_category' => max(1, min(8, (int) ($request->get_param('posts_per_category') ?? 5))),
			'columns'            => max(1, min(4, (int) ($request->get_param('columns') ?? 2))),
			'show_views'         => (int) ($request->get_param('show_views') ?? 0),
			'show_description'   => $request->get_param('show_description') === null ? 1 : (int) $request->get_param('show_description'),
			'show_dates'         => $request->get_param('show_dates') === null ? 1 : (int) $request->get_param('show_dates'),
			'show_more'          => $request->get_param('show_more') === null ? 1 : (int) $request->get_param('show_more'),
		];
		$html = \AKSRT\Widgets\CategoryRecommendWidget::render_html($instance);
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}

	public function rest_forum_boards(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\WidgetForumBoardList')) {
			return $this->fail();
		}
		$instance = [
			'count'      => max(1, min(50, (int) ($request->get_param('count') ?? 30))),
			'orderby'    => sanitize_key((string) ($request->get_param('orderby') ?? 'menu_order')),
			'style'      => sanitize_key((string) ($request->get_param('style') ?? 'list')),
			'hide_empty' => $request->get_param('hide_empty') === null ? 1 : (int) $request->get_param('hide_empty'),
		];
		$html = \AKSRT\Widgets\WidgetForumBoardList::render_html($instance);
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}

	public function rest_tag_cloud(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\TagCloudWidget')) {
			return $this->fail();
		}
		$instance = [
			'taxonomy'    => sanitize_key((string) ($request->get_param('taxonomy') ?? 'post_tag')),
			'count'       => max(1, min(80, (int) ($request->get_param('count') ?? 15))),
			'orderby'     => sanitize_key((string) ($request->get_param('orderby') ?? 'count')),
			'color'       => sanitize_html_class((string) ($request->get_param('color') ?? 'rand')),
			'show_count'  => (int) ($request->get_param('show_count') ?? 0),
			'blank'       => (int) ($request->get_param('blank') ?? 0),
			'fixed_width' => (int) ($request->get_param('fixed_width') ?? 0),
			'hide_empty'  => (int) ($request->get_param('hide_empty') ?? 0),
		];
		$html = \AKSRT\Widgets\TagCloudWidget::render_html($instance);
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}

	public function rest_categories(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\CategoriesWidget')) {
			return $this->fail();
		}
		$instance = [
			'count'        => max(1, min(50, (int) ($request->get_param('count') ?? 8))),
			'orderby'      => sanitize_key((string) ($request->get_param('orderby') ?? 'count')),
			'order'        => sanitize_key((string) ($request->get_param('order') ?? 'DESC')),
			'parent'       => max(0, (int) ($request->get_param('parent') ?? 0)),
			'include'      => sanitize_text_field((string) ($request->get_param('include') ?? '')),
			'exclude'      => sanitize_text_field((string) ($request->get_param('exclude') ?? '')),
			'show_count'   => $request->get_param('show_count') === null ? 1 : (int) $request->get_param('show_count'),
			'hide_empty'   => $request->get_param('hide_empty') === null ? 1 : (int) $request->get_param('hide_empty'),
			'hierarchical' => (int) ($request->get_param('hierarchical') ?? 0),
		];
		$html = \AKSRT\Widgets\CategoriesWidget::render_html($instance);
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}

	public function rest_term_cards(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\WidgetTermCards')) {
			return $this->fail();
		}
		$instance = [
			'taxonomy'   => sanitize_key((string) ($request->get_param('taxonomy') ?? 'category')),
			'number'     => max(1, min(30, (int) ($request->get_param('number') ?? 8))),
			'columns'    => max(1, min(4, (int) ($request->get_param('columns') ?? 2))),
			'orderby'    => sanitize_key((string) ($request->get_param('orderby') ?? 'count')),
			'include'    => sanitize_text_field((string) ($request->get_param('include') ?? '')),
			'hide_empty' => $request->get_param('hide_empty') === null ? 1 : (int) $request->get_param('hide_empty'),
		];
		$html = \AKSRT\Widgets\WidgetTermCards::render_html($instance);
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}

	public function rest_term_aggregation(\WP_REST_Request $request) {
		if (!class_exists('\AKSRT\Widgets\WidgetTermAggregation')) {
			return $this->fail();
		}
		$instance = [
			'taxonomy'   => sanitize_key((string) ($request->get_param('taxonomy') ?? 'category')),
			'term_ids'   => sanitize_text_field((string) ($request->get_param('term_ids') ?? '')),
			'count'      => max(1, min(12, (int) ($request->get_param('count') ?? 4))),
			'columns'    => max(1, min(3, (int) ($request->get_param('columns') ?? 1))),
			'orderby'    => sanitize_key((string) ($request->get_param('orderby') ?? 'date')),
			'auto_terms' => max(1, min(4, (int) ($request->get_param('auto_terms') ?? 2))),
		];
		$html = \AKSRT\Widgets\WidgetTermAggregation::render_html($instance);
		return new \WP_REST_Response(['success' => true, 'html' => $html], 200);
	}

	private function fail(): \WP_REST_Response {
		return new \WP_REST_Response(['success' => false, 'message' => 'unavailable'], 500);
	}

	private function payload(array $payload, int $page): \WP_REST_Response {
		return new \WP_REST_Response([
			'success'       => true,
			'html'          => (string) ($payload['html'] ?? ''),
			'paginate_html' => (string) ($payload['paginate_html'] ?? ''),
			'has_more'      => !empty($payload['has_more']),
			'page'          => (int) ($payload['page'] ?? $page),
			'max_pages'     => (int) ($payload['max_pages'] ?? 1),
			'total'         => (int) ($payload['total'] ?? 0),
		], 200);
	}
}