<?php
/**
 * Multi-tab posts (zibll zib_widget_ui_tab_post + lazy REST).
 *
 * @package AKSRT
 */

namespace AKSRT\Widgets;

defined('ABSPATH') || exit;

class TabPostsWidget extends \WP_Widget {

	public function __construct() {
		parent::__construct(
			'aksrt_tab_posts',
			esc_html__('AKSRT 多栏目文章', 'aksrt'),
			[
				'description' => esc_html__('Tab 切换显示不同分类/排序的文章（懒加载）。', 'aksrt'),
				'customize_selective_refresh' => true,
			]
		);
	}

	/**
	 * @param mixed $tabs
	 * @return list<array{title:string,category_id:int,orderby:string,count:int,enabled:bool}>
	 */
	public static function normalize_tabs_static($tabs): array {
		if (is_string($tabs) && $tabs !== '') {
			$legacy_keys = array_map('trim', explode(',', $tabs));
			$legacy_defs = [
				'latest'   => ['title' => '最新', 'orderby' => 'date'],
				'comments' => ['title' => '热评', 'orderby' => 'comments'],
				'random'   => ['title' => '随机', 'orderby' => 'rand'],
				'views'    => ['title' => '热门', 'orderby' => 'views'],
			];
			$result = [];
			foreach ($legacy_keys as $key) {
				if (isset($legacy_defs[$key])) {
					$result[] = [
						'title'       => __($legacy_defs[$key]['title'], 'aksrt'),
						'category_id' => 0,
						'orderby'     => $legacy_defs[$key]['orderby'],
						'count'       => 0,
						'enabled'     => true,
					];
				} elseif (is_numeric($key) && absint($key) > 0) {
					$term = get_term(absint($key), 'category');
					$result[] = [
						'title'       => ($term && !is_wp_error($term)) ? $term->name : '',
						'category_id' => absint($key),
						'orderby'     => 'date',
						'count'       => 0,
						'enabled'     => true,
					];
				}
			}
			return $result;
		}
		if (is_array($tabs)) {
			$allowed = ['date', 'modified', 'views', 'likes', 'comments', 'favorites', 'downloads', 'rand'];
			$result = [];
			foreach ($tabs as $tab) {
				if (!is_array($tab)) {
					continue;
				}
				$orderby = sanitize_key($tab['orderby'] ?? 'date');
				if (!in_array($orderby, $allowed, true)) {
					$orderby = 'date';
				}
				$result[] = [
					'title'       => sanitize_text_field((string) ($tab['title'] ?? '')),
					'category_id' => absint($tab['category_id'] ?? 0),
					'orderby'     => $orderby,
					'count'       => max(0, min(20, (int) ($tab['count'] ?? 0))),
					'enabled'     => !empty($tab['enabled']),
				];
			}
			return $result;
		}
		return [];
	}

	private function normalize_tabs($tabs): array {
		return self::normalize_tabs_static($tabs);
	}

	/**
	 * Build query for a tab → reuse main posts payload renderer.
	 *
	 * @param array $tab
	 * @param int   $default_count
	 * @return array
	 */
	public static function tab_to_main_instance(array $tab, int $default_count, array $opts = []): array {
		$count = !empty($tab['count']) ? (int) $tab['count'] : $default_count;
		$style = sanitize_key((string) ($opts['style'] ?? $tab['style'] ?? 'mini'));
		if (!in_array($style, ['list', 'card', 'mini'], true)) {
			$style = 'mini';
		}
		$paginate = sanitize_key((string) ($opts['paginate'] ?? $tab['paginate'] ?? 'none'));
		if (!in_array($paginate, ['none', 'ajax', 'number'], true)) {
			$paginate = 'none';
		}
		return [
			'count'       => max(1, min(30, $count)),
			'orderby'     => sanitize_key((string) ($tab['orderby'] ?? 'date')),
			'cat'         => absint($tab['category_id'] ?? 0),
			'style'       => $style,
			'show_thumb'  => !isset($opts['show_thumb']) ? 1 : (int) $opts['show_thumb'],
			'show_meta'   => !isset($opts['show_meta']) ? 1 : (int) $opts['show_meta'],
			'show_number' => !empty($opts['show_number']) ? 1 : 0,
			'paginate'    => $paginate,
		];
	}

	/**
	 * REST helper: render one tab list HTML.
	 *
	 * @param array<string,mixed> $opts
	 */
	public static function render_tab_html(array $tab, int $default_count, array $opts = []): string {
		$payload = self::render_tab_payload($tab, $default_count, $opts, 1);
		return (string) ($payload['html'] ?? '');
	}

	/**
	 * Full tab payload (html + pager) for REST/ajax.
	 *
	 * @param array<string,mixed> $opts
	 * @return array{html:string,paginate_html:string,has_more:bool,page:int,max_pages:int,total:int}
	 */
	public static function render_tab_payload(array $tab, int $default_count, array $opts = [], int $page = 1): array {
		$inst = self::tab_to_main_instance($tab, $default_count, $opts);
		if (class_exists('\AKSRT\Widgets\WidgetMainPosts')) {
			return WidgetMainPosts::query_payload($inst, $page);
		}
		return [
			'html'          => '',
			'paginate_html' => '',
			'has_more'      => false,
			'page'          => 1,
			'max_pages'     => 1,
			'total'         => 0,
		];
	}

	/** Skeleton rows for lazy tab panels. */
	public static function skeleton_html(int $count = 5, string $style = 'mini'): string {
		$count = max(1, min(12, $count));
		ob_start();
		echo '<div class="widget-tab-posts__skeleton posts-mini-lists style-' . esc_attr($style) . '">';
		for ($i = 0; $i < $count; $i++) {
			echo '<div class="posts-mini placeholder-row">';
			echo '<div class="placeholder radius thumb-placeholder"></div>';
			echo '<div class="flex1"><div class="placeholder k1"></div><div class="placeholder s1 mt6"></div></div>';
			echo '</div>';
		}
		echo '</div>';
		return (string) ob_get_clean();
	}

	public function widget($args, $instance): void {
		echo $args['before_widget']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped

		$title = apply_filters('widget_title', (string) ($instance['title'] ?? ''), $instance, $this->id_base);
		$count = absint($instance['count'] ?? 5);
		$style = sanitize_key((string) ($instance['style'] ?? 'mini'));
		if (!in_array($style, ['list', 'card', 'mini'], true)) {
			$style = 'mini';
		}
		$paginate = sanitize_key((string) ($instance['paginate'] ?? 'none'));
		if (!in_array($paginate, ['none', 'ajax', 'number'], true)) {
			$paginate = 'none';
		}
		$tabs  = $this->normalize_tabs($instance['tabs'] ?? 'latest,comments,random');
		$tabs  = array_values(array_filter($tabs, static fn($t) => !empty($t['enabled'])));
		if (!$tabs) {
			if (current_user_can('manage_options')) {
				echo function_exists('aksrt_get_widget_null')
					? aksrt_get_widget_null(__('请至少启用一个 Tab', 'aksrt')) // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
					: '<p class="widget-empty">' . esc_html__('请至少启用一个 Tab', 'aksrt') . '</p>';
			}
			echo $args['after_widget']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			return;
		}

		if ($title !== '') {
			echo $args['before_title'] . esc_html($title) . $args['after_title']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
		}

		$widget_id = $this->id;
		$rest = rest_url('aksrt/v1/widgets/tab-posts');
		$use_shared = function_exists('aksrt_render_mini_list');
		?>
		<div class="widget-tab-posts" id="<?php echo esc_attr($widget_id); ?>-tabs"
			data-aksrt-tab-posts
			data-rest="<?php echo esc_url($rest); ?>"
			data-count="<?php echo esc_attr((string) $count); ?>"
				data-style="<?php echo esc_attr($style); ?>"
				data-paginate="<?php echo esc_attr($paginate); ?>">
			<ul class="widget-tab-posts__nav" role="tablist">
				<?php $first = true; foreach ($tabs as $i => $tab) :
					$tab_key = 'tab-' . $i;
					$tab_title = $tab['title'] !== '' ? $tab['title'] : sprintf(__('Tab %d', 'aksrt'), $i + 1);
					?>
					<li role="presentation">
						<button type="button" role="tab"
							class="widget-tab-posts__tab<?php echo $first ? ' active' : ''; ?>"
							data-tab="<?php echo esc_attr($tab_key); ?>"
							data-index="<?php echo (int) $i; ?>"
							data-orderby="<?php echo esc_attr($tab['orderby']); ?>"
							data-cat="<?php echo (int) $tab['category_id']; ?>"
							data-tab-count="<?php echo (int) $tab['count']; ?>"
							aria-selected="<?php echo $first ? 'true' : 'false'; ?>"
						><?php echo esc_html($tab_title); ?></button>
					</li>
				<?php $first = false; endforeach; ?>
			</ul>

			<?php $first = true; foreach ($tabs as $i => $tab) :
				$tab_key = 'tab-' . $i;
				?>
				<div class="widget-tab-posts__panel<?php echo $first ? ' active' : ''; ?>"
					data-tab-panel="<?php echo esc_attr($tab_key); ?>"
					data-loaded="<?php echo $first ? '1' : '0'; ?>"
					role="tabpanel"<?php echo $first ? '' : ' hidden'; ?>>
					<?php if ($first) :
							$opts = ['style' => $style, 'paginate' => $paginate];
							$payload = self::render_tab_payload($tab, $count, $opts, 1);
							$html = (string) ($payload['html'] ?? '');
							if ($html !== '') {
								echo '<div class="widget-tab-posts__list widget-tab-posts__list--' . esc_attr($style) . ' aksrt-main-posts style-' . esc_attr($style) . '">' . $html . '</div>'; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
								if (!empty($payload['paginate_html'])) {
									echo $payload['paginate_html']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
								}
							} else {
								echo function_exists('aksrt_get_widget_null') ? aksrt_get_widget_null(__('暂无文章', 'aksrt')) : '<p class="widget-empty">' . esc_html__('暂无文章', 'aksrt') . '</p>'; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
							}
						else : ?>
							<div class="post_ajax_loader" data-aksrt-ajax-loader><?php echo self::skeleton_html($count, $style); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?></div>
						<?php endif; ?>
				</div>
			<?php $first = false; endforeach; ?>
		</div>
		<?php
		echo $args['after_widget']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
	}

	public function form($instance): void {
		$title = $instance['title'] ?? '';
		$count = (int) ($instance['count'] ?? 5);
		$tabs  = $this->normalize_tabs($instance['tabs'] ?? 'latest,comments,random');
		$orderby_options = [
			'date'      => __('最新', 'aksrt'),
			'modified'  => __('更新', 'aksrt'),
			'views'     => __('浏览', 'aksrt'),
			'likes'     => __('点赞', 'aksrt'),
			'comments'  => __('评论', 'aksrt'),
			'favorites' => __('收藏', 'aksrt'),
			'downloads' => __('下载', 'aksrt'),
			'rand'      => __('随机', 'aksrt'),
		];
		?>
		<p>
			<label for="<?php echo esc_attr($this->get_field_id('title')); ?>"><?php esc_html_e('标题（可选）:', 'aksrt'); ?></label>
			<input class="widefat" id="<?php echo esc_attr($this->get_field_id('title')); ?>" name="<?php echo esc_attr($this->get_field_name('title')); ?>" type="text" value="<?php echo esc_attr((string) $title); ?>">
		</p>
		<p>
			<label for="<?php echo esc_attr($this->get_field_id('count')); ?>"><?php esc_html_e('默认每个 Tab 显示数量:', 'aksrt'); ?></label>
			<input class="tiny-text" id="<?php echo esc_attr($this->get_field_id('count')); ?>" name="<?php echo esc_attr($this->get_field_name('count')); ?>" type="number" min="1" max="20" value="<?php echo (int) $count; ?>">
		</p>
			<p>
				<label><?php esc_html_e('列表样式', 'aksrt'); ?>
					<select name="<?php echo esc_attr($this->get_field_name('style')); ?>">
						<option value="mini" <?php selected(($instance['style'] ?? 'mini'), 'mini'); ?>><?php esc_html_e('迷你', 'aksrt'); ?></option>
						<option value="list" <?php selected(($instance['style'] ?? ''), 'list'); ?>><?php esc_html_e('列表', 'aksrt'); ?></option>
						<option value="card" <?php selected(($instance['style'] ?? ''), 'card'); ?>><?php esc_html_e('卡片', 'aksrt'); ?></option>
					</select>
				</label>
			</p>
			<p>
				<label><?php esc_html_e('分页', 'aksrt'); ?>
					<select name="<?php echo esc_attr($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>
		<hr style="margin:12px 0;">
		<p style="font-weight:600;margin-bottom:8px;"><?php esc_html_e('Tab 配置', 'aksrt'); ?></p>
		<?php
		$max_tabs = 8;
		$tabs = array_slice($tabs, 0, $max_tabs);
		while (count($tabs) < 3) {
			$tabs[] = ['title' => '', 'category_id' => 0, 'orderby' => 'date', 'count' => 0, 'enabled' => false];
		}
		foreach ($tabs as $i => $tab) :
			?>
		<div style="border:1px solid #ddd;padding:8px;margin-bottom:8px;border-radius:4px;background:#fafafa;">
			<p style="margin:0 0 6px;">
				<label><input type="checkbox" name="<?php echo esc_attr($this->get_field_name("tabs[{$i}][enabled]")); ?>" value="1" <?php checked(!empty($tab['enabled'])); ?>> <?php printf(esc_html__('Tab %d 启用', 'aksrt'), $i + 1); ?></label>
			</p>
			<p style="margin:0 0 6px;">
				<label><?php esc_html_e('标题:', 'aksrt'); ?></label>
				<input class="widefat" type="text" name="<?php echo esc_attr($this->get_field_name("tabs[{$i}][title]")); ?>" value="<?php echo esc_attr($tab['title']); ?>" placeholder="<?php esc_attr_e('留空则使用分类名', 'aksrt'); ?>">
			</p>
			<p style="margin:0 0 6px;">
				<label><?php esc_html_e('分类 ID:', 'aksrt'); ?></label>
				<input class="tiny-text" type="number" min="0" name="<?php echo esc_attr($this->get_field_name("tabs[{$i}][category_id]")); ?>" value="<?php echo (int) $tab['category_id']; ?>" placeholder="0">
			</p>
			<p style="margin:0 0 6px;">
				<label><?php esc_html_e('排序:', 'aksrt'); ?></label>
				<select class="widefat" name="<?php echo esc_attr($this->get_field_name("tabs[{$i}][orderby]")); ?>">
					<?php foreach ($orderby_options as $val => $label) : ?>
						<option value="<?php echo esc_attr($val); ?>" <?php selected($tab['orderby'], $val); ?>><?php echo esc_html($label); ?></option>
					<?php endforeach; ?>
				</select>
			</p>
			<p style="margin:0;">
				<label><?php esc_html_e('数量（0=使用默认）:', 'aksrt'); ?></label>
				<input class="tiny-text" type="number" min="0" max="20" name="<?php echo esc_attr($this->get_field_name("tabs[{$i}][count]")); ?>" value="<?php echo (int) $tab['count']; ?>">
			</p>
		</div>
		<?php endforeach;
	}

	public function update($new_instance, $old_instance): array {
		$style = sanitize_key((string) ($new_instance['style'] ?? 'mini'));
		if (!in_array($style, ['list', 'card', 'mini'], true)) {
			$style = 'mini';
		}
		$paginate = sanitize_key((string) ($new_instance['paginate'] ?? 'none'));
		if (!in_array($paginate, ['none', 'ajax', 'number'], true)) {
			$paginate = 'none';
		}
		$result = [
			'title'    => sanitize_text_field((string) ($new_instance['title'] ?? '')),
			'count'    => max(1, min(20, (int) ($new_instance['count'] ?? 5))),
			'style'    => $style,
			'paginate' => $paginate,
		];
		$tabs = [];
		if (isset($new_instance['tabs']) && is_array($new_instance['tabs'])) {
			$allowed = ['date', 'modified', 'views', 'likes', 'comments', 'favorites', 'downloads', 'rand'];
			foreach ($new_instance['tabs'] as $tab) {
				if (!is_array($tab)) {
					continue;
				}
				$orderby = sanitize_key($tab['orderby'] ?? 'date');
				if (!in_array($orderby, $allowed, true)) {
					$orderby = 'date';
				}
				$tabs[] = [
					'title'       => sanitize_text_field((string) ($tab['title'] ?? '')),
					'category_id' => absint($tab['category_id'] ?? 0),
					'orderby'     => $orderby,
					'count'       => max(0, min(20, (int) ($tab['count'] ?? 0))),
					'enabled'     => !empty($tab['enabled']),
				];
			}
		}
		$result['tabs'] = !empty($tabs) ? $tabs : 'latest,comments,random';
		return $result;
	}
}