<?php
/**
 * Main posts list (zibll zib_widget_ui_main_post + ajax pager).
 *
 * @package AKSRT
 */

namespace AKSRT\Widgets;


defined('ABSPATH') || exit;

class WidgetMainPosts extends \WP_Widget {

	public function __construct() {
		parent::__construct(
			'aksrt_main_posts',
			esc_html__('AKSRT 文章列表', 'aksrt'),
			[
				'description' => esc_html__('卡片/迷你/列表样式的文章模块（支持 AJAX）。', 'aksrt'),
				'classname'   => 'widget_aksrt_main_posts',
			]
		);
	}

	/**
	 * @param array $instance
	 * @param int   $paged
	 * @return array
	 */
	public static function build_query_args(array $instance, int $paged = 1): array {
		$count = max(1, min(30, (int) ($instance['count'] ?? 6)));
		$orderby = sanitize_key((string) ($instance['orderby'] ?? 'date'));
		$cat = (int) ($instance['cat'] ?? 0);
		$limit_day = max(0, (int) ($instance['limit_day'] ?? 0));
		// Zibll `order` parity: asc/desc. Default desc.
		$order = strtoupper(sanitize_key((string) ($instance['order'] ?? 'desc'))) === 'ASC' ? 'ASC' : 'DESC';

		$query = [
			'post_type'           => 'post',
			'post_status'         => 'publish',
			'posts_per_page'      => $count,
			'paged'               => max(1, $paged),
			'ignore_sticky_posts' => true,
		];
		if ($cat > 0) {
			$query['cat'] = $cat;
		}
		if ($limit_day > 0) {
			$query['date_query'] = [['after' => $limit_day . ' days ago']];
		}
		switch ($orderby) {
			case 'views':
				$query['meta_key'] = 'aksrt_post_views';
				$query['orderby']  = 'meta_value_num';
				$query['order']    = $order;
				break;
			case 'comments':
				$query['orderby'] = 'comment_count';
				$query['order']   = $order;
				break;
			case 'likes':
				$query['meta_key'] = '_aksrt_like_count';
				$query['orderby']  = 'meta_value_num';
				$query['order']    = $order;
				break;
			case 'favorites':
				$query['meta_key'] = '_aksrt_favorite_count';
				$query['orderby']  = 'meta_value_num';
				$query['order']    = $order;
				break;
			case 'downloads':
				$query['meta_key'] = '_aksrt_res_download_count';
				$query['orderby']  = 'meta_value_num';
				$query['order']    = $order;
				break;
			case 'rand':
				$query['orderby'] = 'rand';
				break;
			case 'modified':
				$query['orderby'] = 'modified';
				$query['order']   = $order;
				break;
			default:
				$query['orderby'] = 'date';
				$query['order']   = $order;
		}

		// Pay type filter (reading/download/gallery/video/vip or any paid).
		$pay_type = sanitize_key((string) ($instance['pay_type'] ?? ''));
		if ($pay_type !== '' && $pay_type !== '0' && $pay_type !== 'no') {
			$mq = isset($query['meta_query']) && is_array($query['meta_query']) ? $query['meta_query'] : [];
			if ($pay_type === 'any' || $pay_type === 'paid') {
				$mq[] = [
					'relation' => 'OR',
					[
						'key'     => '_aksrt_pay_price',
						'value'   => 0,
						'compare' => '>',
						'type'    => 'NUMERIC',
					],
					[
						'key'     => '_aksrt_pay_type',
						'value'   => ['reading', 'download', 'gallery', 'video', 'vip'],
						'compare' => 'IN',
					],
					[
						'key'     => '_aksrt_visibility',
						'value'   => ['pay', 'credits'],
						'compare' => 'IN',
					],
				];
			} else {
				$mq[] = [
					'key'   => '_aksrt_pay_type',
					'value' => $pay_type,
				];
			}
			if ($mq) {
				if (count($mq) > 1) {
					$mq['relation'] = 'AND';
				}
				$query['meta_query'] = $mq;
			}
		}

		return $query;
	}

	public static function render_items_html(\WP_Query $q, array $instance): string {
		if (!$q->have_posts()) {
			return '';
		}
		$style = sanitize_key((string) ($instance['style'] ?? 'list'));
		if (!in_array($style, ['list', 'card', 'mini'], true)) {
			$style = 'list';
		}
		$show_thumb = !isset($instance['show_thumb']) || !empty($instance['show_thumb']);
		$show_meta = !isset($instance['show_meta']) || !empty($instance['show_meta']);
		$show_number = !empty($instance['show_number']);
		$start = max(0, (int) ($instance['_start_index'] ?? 0));

		ob_start();
		// Outer wrapper only on page 1 full render handled by caller for ajax append items.
		$mode = $style === 'card' ? 'card' : ($style === 'mini' ? 'mini' : 'list');
		if (function_exists('aksrt_render_post')) {
			$html = '';
			$i = $start;
			while ($q->have_posts()) {
				$q->the_post();
				$i++;
				$html .= aksrt_render_post([
					'mode' => $mode,
					'context' => 'widget',
					'show_thumb' => $show_thumb,
					'show_meta' => $show_meta,
					'show_excerpt' => $mode === 'list',
					'show_number' => $show_number && $mode === 'mini',
					'number_offset' => $show_number ? $i : 0,
					'extra_class' => 'ajax-item',
				]);
			}
			wp_reset_postdata();
			return $html;
		}

		$placeholder = get_template_directory_uri() . '/assets/img/placeholder.svg';
		$i = $start;
		while ($q->have_posts()) {
			$q->the_post();
			$i++;
			$thumb = $show_thumb ? get_the_post_thumbnail_url(get_the_ID(), $style === 'card' ? 'medium' : 'thumbnail') : '';
			$views = (int) get_post_meta(get_the_ID(), 'aksrt_post_views', true);

			if ($style === 'card') {
				echo '<a class="aksrt-main-posts__card ajax-item" href="' . esc_url(get_permalink()) . '">';
				echo '<div class="aksrt-main-posts__thumb' . ($thumb ? '' : ' is-empty') . '">';
				if ($thumb) {
					echo '<img class="aksrt-lazy lazyload" data-src="' . esc_url($thumb) . '" src="' . esc_url($placeholder) . '" alt="" loading="lazy" />';
				}
				echo '</div>';
				echo '<div class="aksrt-main-posts__body">';
				echo '<div class="aksrt-main-posts__title">' . esc_html(get_the_title()) . '</div>';
				if ($show_meta) {
					echo '<div class="aksrt-main-posts__meta"><span>' . esc_html(get_the_date()) . '</span>';
					if ($views > 0) {
						echo '<span><i class="fas fa-eye"></i> ' . esc_html((string) $views) . '</span>';
					}
					echo '</div>';
				}
				echo '</div></a>';
			} else {
				echo '<a class="aksrt-main-posts__row ajax-item" href="' . esc_url(get_permalink()) . '">';
				if ($show_number) {
					echo '<span class="aksrt-main-posts__num">' . esc_html((string) $i) . '</span>';
				}
				if ($show_thumb) {
					echo '<span class="aksrt-main-posts__thumb mini' . ($thumb ? '' : ' is-empty') . '">';
					if ($thumb) {
						echo '<img class="aksrt-lazy lazyload" data-src="' . esc_url($thumb) . '" src="' . esc_url($placeholder) . '" alt="" loading="lazy" />';
					}
					echo '</span>';
				}
				echo '<span class="aksrt-main-posts__body">';
				echo '<span class="aksrt-main-posts__title">' . esc_html(get_the_title()) . '</span>';
				if ($show_meta) {
					echo '<span class="aksrt-main-posts__meta">' . esc_html(get_the_date()) . '</span>';
				}
				echo '</span></a>';
			}
		}
		wp_reset_postdata();
		return (string) ob_get_clean();
	}

	/**
	 * @return array{html:string,paginate_html:string,has_more:bool,page:int,max_pages:int,total:int}
	 */
	public static function query_payload(array $instance, int $page = 1): array {
		$page = max(1, $page);
		$paginate = sanitize_key((string) ($instance['paginate'] ?? 'none'));
		$count = max(1, min(30, (int) ($instance['count'] ?? 6)));
		$instance['_start_index'] = ($page - 1) * $count;
		$q = new \WP_Query(self::build_query_args($instance, $page));
		$html = self::render_items_html($q, $instance);
		if ($html === '' && $page === 1) {
			$html = function_exists('aksrt_get_ajax_null')
				? aksrt_get_ajax_null(__('暂无文章', 'aksrt'))
				: '<p class="aksrt-main-posts__empty ajax-item">' . esc_html__('暂无文章', 'aksrt') . '</p>';
		}
		$max_pages = max(1, (int) $q->max_num_pages);
		$total = (int) $q->found_posts;
		$has_more = $page < $max_pages;
		$base_qs = array_filter([
			'count'       => $count,
			'orderby'     => sanitize_key((string) ($instance['orderby'] ?? 'date')),
			'order'       => strtoupper(sanitize_key((string) ($instance['order'] ?? 'desc'))) === 'ASC' ? 'ASC' : 'DESC',
			'cat'         => (int) ($instance['cat'] ?? 0),
			'limit_day'   => (int) ($instance['limit_day'] ?? 0),
			'pay_type'    => sanitize_key((string) ($instance['pay_type'] ?? '')),
			'style'       => sanitize_key((string) ($instance['style'] ?? 'list')),
			'show_thumb'  => !isset($instance['show_thumb']) || !empty($instance['show_thumb']) ? 1 : 0,
			'show_meta'   => !isset($instance['show_meta']) || !empty($instance['show_meta']) ? 1 : 0,
			'show_number' => !empty($instance['show_number']) ? 1 : 0,
			'paginate'    => $paginate,
			'load_mode'   => sanitize_key((string) ($instance['load_mode'] ?? 'detail')) === 'ajax' ? 'ajax' : 'detail',
		], static function ($v) {
			return $v !== '' && $v !== null;
		});
		$rest_base = add_query_arg($base_qs, rest_url('aksrt/v1/widgets/posts'));
		$paginate_html = '';
		if ($paginate === 'ajax' && $has_more) {
			$next = add_query_arg(['page' => $page + 1], $rest_base);
			$paginate_html = function_exists('aksrt_get_ajax_next_paginate')
				? aksrt_get_ajax_next_paginate($total, $page, $count, $next)
				: '<div class="text-center theme-pagination ajax-pag"><div class="next-page ajax-next"><a href="' . esc_url($next) . '">' . esc_html__('加载更多', 'aksrt') . '</a></div></div>';
		} elseif ($paginate === 'number' && $max_pages > 1) {
			$paginate_html = function_exists('aksrt_get_ajax_number_paginate')
				? aksrt_get_ajax_number_paginate($total, $page, $count, $rest_base)
				: '<div class="ajax-pag hide"><div class="next-page ajax-next"><a href="#"></a></div></div>';
		} else {
			$paginate_html = '<div class="ajax-pag hide"><div class="next-page ajax-next"><a href="#"></a></div></div>';
		}
		return [
			'html'          => $html,
			'paginate_html' => $paginate_html,
			'has_more'      => $has_more,
			'page'          => $page,
			'max_pages'     => $max_pages,
			'total'         => $total,
		];
	}

	public function widget($args, $instance): void {
		$style = sanitize_key((string) ($instance['style'] ?? 'list'));
		if (!in_array($style, ['list', 'card', 'mini'], true)) {
			$style = 'list';
		}
		$paginate = sanitize_key((string) ($instance['paginate'] ?? 'none'));
		if (!in_array($paginate, ['none', 'ajax', 'number'], true)) {
			$paginate = 'none';
		}
		$load_mode = sanitize_key((string) ($instance['load_mode'] ?? 'detail'));
		if (!in_array($load_mode, ['detail', 'ajax'], true)) {
			$load_mode = 'detail';
		}
		$instance['style'] = $style;
		$instance['paginate'] = $paginate;

		echo $args['before_widget']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
		$title = apply_filters('widget_title', (string) ($instance['title'] ?? ''), $instance, $this->id_base);
		if ($title !== '') {
			echo $args['before_title'] . esc_html($title) . $args['after_title']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
		}

		$count = max(1, min(30, (int) ($instance['count'] ?? 6)));
		$rest = rest_url('aksrt/v1/widgets/posts');
		$qs = http_build_query(array_filter([
			'page'        => 1,
			'count'       => $count,
			'orderby'     => sanitize_key((string) ($instance['orderby'] ?? 'date')),
			'order'       => strtoupper(sanitize_key((string) ($instance['order'] ?? 'desc'))) === 'ASC' ? 'ASC' : 'DESC',
			'cat'         => (int) ($instance['cat'] ?? 0),
			'limit_day'   => (int) ($instance['limit_day'] ?? 0),
			'pay_type'    => sanitize_key((string) ($instance['pay_type'] ?? '')),
			'style'       => $style,
			'show_thumb'  => !isset($instance['show_thumb']) || !empty($instance['show_thumb']) ? 1 : 0,
			'show_meta'   => !isset($instance['show_meta']) || !empty($instance['show_meta']) ? 1 : 0,
			'show_number' => !empty($instance['show_number']) ? 1 : 0,
			'paginate'    => $paginate,
			'load_mode'   => sanitize_key((string) ($instance['load_mode'] ?? 'detail')) === 'ajax' ? 'ajax' : 'detail',
		], static function ($v) {
			return $v !== '' && $v !== null;
		}));
		$wrap_cls = 'aksrt-main-posts style-' . $style . ' ajaxpager';
		if ($style === 'mini') {
			$wrap_cls .= ' zib-widget posts-mini-lists';
		}
		echo '<div class="' . esc_attr($wrap_cls) . '" data-aksrt-ajaxpager data-aksrt-ajax-url="' . esc_url($rest) . '" data-load-mode="' . esc_attr($load_mode) . '" data-query="' . esc_attr($qs) . '"' . ($load_mode === 'ajax' ? ' data-loaded="0"' : ' data-loaded="1"') . '>';

		if ($load_mode === 'ajax') {
			// Skeleton first paint (zibll load_mode=ajax).
			echo '<div class="aksrt-main-posts__skeleton">';
			for ($si = 0; $si < $count; $si++) {
				if ($style === 'card') {
					echo '<div class="placeholder-row card"><div class="placeholder thumb"></div><div class="placeholder k1"></div></div>';
				} else {
					echo '<div class="posts-mini placeholder-row"><div class="placeholder radius thumb-placeholder"></div><div class="flex1"><div class="placeholder t1 k1"></div><div class="placeholder s1"></div></div></div>';
				}
			}
			echo '</div>';
		} else {
			$payload = self::query_payload($instance, 1);
			echo $payload['html']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			echo $payload['paginate_html']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
		}
		echo '<div class="post_ajax_loader" data-aksrt-ajax-loader data-aksrt-ajax-loader-hide hidden></div>';
		echo '</div>';

		echo $args['after_widget']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
	}

	public function form($instance): void {
		?>
		<p>
			<label><?php esc_html_e('标题', 'aksrt'); ?>
				<input class="widefat" type="text" name="<?php echo esc_attr($this->get_field_name('title')); ?>" value="<?php echo esc_attr((string) ($instance['title'] ?? '')); ?>">
			</label>
		</p>
		<p>
			<label><?php esc_html_e('数量', 'aksrt'); ?>
				<input class="tiny-text" type="number" min="1" max="30" name="<?php echo esc_attr($this->get_field_name('count')); ?>" value="<?php echo esc_attr((string) ((int) ($instance['count'] ?? 6))); ?>">
			</label>
		</p>
		<p>
			<label><?php esc_html_e('样式', 'aksrt'); ?>
				<select name="<?php echo esc_attr($this->get_field_name('style')); ?>">
					<option value="list" <?php selected(($instance['style'] ?? 'list'), 'list'); ?>><?php esc_html_e('列表', 'aksrt'); ?></option>
					<option value="mini" <?php selected(($instance['style'] ?? ''), 'mini'); ?>><?php esc_html_e('迷你', 'aksrt'); ?></option>
					<option value="card" <?php selected(($instance['style'] ?? ''), 'card'); ?>><?php esc_html_e('卡片', 'aksrt'); ?></option>
				</select>
			</label>
		</p>
		<p>
			<label><?php esc_html_e('排序', 'aksrt'); ?>
				<select name="<?php echo esc_attr($this->get_field_name('orderby')); ?>">
					<option value="date" <?php selected(($instance['orderby'] ?? 'date'), 'date'); ?>><?php esc_html_e('时间', 'aksrt'); ?></option>
					<option value="modified" <?php selected(($instance['orderby'] ?? ''), 'modified'); ?>><?php esc_html_e('更新', 'aksrt'); ?></option>
					<option value="views" <?php selected(($instance['orderby'] ?? ''), 'views'); ?>><?php esc_html_e('浏览', 'aksrt'); ?></option>
					<option value="comments" <?php selected(($instance['orderby'] ?? ''), 'comments'); ?>><?php esc_html_e('评论', 'aksrt'); ?></option>
					<option value="likes" <?php selected(($instance['orderby'] ?? ''), 'likes'); ?>><?php esc_html_e('点赞', 'aksrt'); ?></option>
					<option value="favorites" <?php selected(($instance['orderby'] ?? ''), 'favorites'); ?>><?php esc_html_e('收藏', 'aksrt'); ?></option>
					<option value="downloads" <?php selected(($instance['orderby'] ?? ''), 'downloads'); ?>><?php esc_html_e('下载', 'aksrt'); ?></option>
					<option value="rand" <?php selected(($instance['orderby'] ?? ''), 'rand'); ?>><?php esc_html_e('随机', 'aksrt'); ?></option>
				</select>
				<select name="<?php echo esc_attr($this->get_field_name('order')); ?>">
					<option value="desc" <?php selected(($instance['order'] ?? 'desc'), 'desc'); ?>><?php esc_html_e('降序', 'aksrt'); ?></option>
					<option value="asc" <?php selected(($instance['order'] ?? ''), 'asc'); ?>><?php esc_html_e('升序', 'aksrt'); ?></option>
				</select>
			</label>
		</p>
		<p>
			<label><?php esc_html_e('分类 ID（0=全部）', 'aksrt'); ?>
				<input class="tiny-text" type="number" min="0" name="<?php echo esc_attr($this->get_field_name('cat')); ?>" value="<?php echo esc_attr((string) ((int) ($instance['cat'] ?? 0))); ?>">
			</label>
		</p>
		<p>
			<label><?php esc_html_e('最近 N 天（0=不限）', 'aksrt'); ?>
				<input class="tiny-text" type="number" min="0" name="<?php echo esc_attr($this->get_field_name('limit_day')); ?>" value="<?php echo esc_attr((string) ((int) ($instance['limit_day'] ?? 0))); ?>">
			</label>
		</p>
				<p>
			<label><?php esc_html_e('模块加载', 'aksrt'); ?>
				<select name="<?php echo esc_attr($this->get_field_name('load_mode')); ?>">
					<option value="detail" <?php selected(($instance['load_mode'] ?? 'detail'), 'detail'); ?>><?php esc_html_e('直接加载', 'aksrt'); ?></option>
					<option value="ajax" <?php selected(($instance['load_mode'] ?? ''), 'ajax'); ?>><?php esc_html_e('AJAX 懒加载', 'aksrt'); ?></option>
				</select>
			</label>
		</p>
<p>
			<label><?php esc_html_e('分页', 'aksrt'); ?>
				<select name="<?php echo esc_attr($this->get_field_name('paginate')); ?>">
					<option value="none" <?php selected(($instance['paginate'] ?? 'none'), 'none'); ?>><?php esc_html_e('无', 'aksrt'); ?></option>
					<option value="ajax" <?php selected(($instance['paginate'] ?? ''), 'ajax'); ?>><?php esc_html_e('AJAX 加载更多', 'aksrt'); ?></option>
					<option value="number" <?php selected(($instance['paginate'] ?? ''), 'number'); ?>><?php esc_html_e('数字分页', 'aksrt'); ?></option>
				</select>
			</label>
		</p>
		<p>
			<label><?php esc_html_e('付费类型', 'aksrt'); ?>
				<select name="<?php echo esc_attr($this->get_field_name('pay_type')); ?>">
					<option value="" <?php selected(($instance['pay_type'] ?? ''), ''); ?>><?php esc_html_e('不限', 'aksrt'); ?></option>
					<option value="paid" <?php selected(($instance['pay_type'] ?? ''), 'paid'); ?>><?php esc_html_e('任意付费', 'aksrt'); ?></option>
					<option value="reading" <?php selected(($instance['pay_type'] ?? ''), 'reading'); ?>><?php esc_html_e('付费阅读', 'aksrt'); ?></option>
					<option value="download" <?php selected(($instance['pay_type'] ?? ''), 'download'); ?>><?php esc_html_e('付费下载', 'aksrt'); ?></option>
					<option value="gallery" <?php selected(($instance['pay_type'] ?? ''), 'gallery'); ?>><?php esc_html_e('付费图库', 'aksrt'); ?></option>
					<option value="video" <?php selected(($instance['pay_type'] ?? ''), 'video'); ?>><?php esc_html_e('付费视频', 'aksrt'); ?></option>
					<option value="vip" <?php selected(($instance['pay_type'] ?? ''), 'vip'); ?>><?php esc_html_e('会员专属', 'aksrt'); ?></option>
				</select>
			</label>
		</p>
		<p>
			<label><input type="checkbox" name="<?php echo esc_attr($this->get_field_name('show_thumb')); ?>" value="1" <?php checked(!isset($instance['show_thumb']) || !empty($instance['show_thumb'])); ?>> <?php esc_html_e('显示缩略图', 'aksrt'); ?></label><br>
			<label><input type="checkbox" name="<?php echo esc_attr($this->get_field_name('show_meta')); ?>" value="1" <?php checked(!isset($instance['show_meta']) || !empty($instance['show_meta'])); ?>> <?php esc_html_e('显示 meta', 'aksrt'); ?></label><br>
			<label><input type="checkbox" name="<?php echo esc_attr($this->get_field_name('show_number')); ?>" value="1" <?php checked(!empty($instance['show_number'])); ?>> <?php esc_html_e('显示序号', 'aksrt'); ?></label>
		</p>
		<?php
	}

	public function update($new_instance, $old_instance): array {
		$style = sanitize_key((string) ($new_instance['style'] ?? 'list'));
		if (!in_array($style, ['list', 'card', 'mini'], true)) {
			$style = 'list';
		}
		$orderby = sanitize_key((string) ($new_instance['orderby'] ?? 'date'));
		if (!in_array($orderby, ['date', 'modified', 'views', 'comments', 'likes', 'favorites', 'downloads', 'rand'], true)) {
			$orderby = 'date';
		}
		$paginate = sanitize_key((string) ($new_instance['paginate'] ?? 'none'));
		if (!in_array($paginate, ['none', 'ajax', 'number'], true)) {
			$paginate = 'none';
		}
		return [
			'title'       => sanitize_text_field((string) ($new_instance['title'] ?? '')),
			'count'       => max(1, min(30, (int) ($new_instance['count'] ?? 6))),
			'style'       => $style,
			'orderby'     => $orderby,
			'order'       => strtoupper(sanitize_key((string) ($new_instance['order'] ?? 'desc'))) === 'ASC' ? 'ASC' : 'DESC',
			'cat'         => max(0, (int) ($new_instance['cat'] ?? 0)),
			'limit_day'   => max(0, (int) ($new_instance['limit_day'] ?? 0)),
			'pay_type'    => sanitize_key((string) ($new_instance['pay_type'] ?? '')),
			'paginate'    => $paginate,
			'load_mode'   => sanitize_key((string) ($new_instance['load_mode'] ?? 'detail')) === 'ajax' ? 'ajax' : 'detail',
			'show_thumb'  => !empty($new_instance['show_thumb']) ? 1 : 0,
			'show_meta'   => !empty($new_instance['show_meta']) ? 1 : 0,
			'show_number' => !empty($new_instance['show_number']) ? 1 : 0,
		];
	}
}