<?php
/**
 * Unified single post composition (legacy-style closed surface).
 *
 * single.php stays a thin shell. All article assembly lives here.
 *
 * @package AKSRT
 */

defined('ABSPATH') || exit;

if (!function_exists('aksrt_single_build_context')) :
	/**
	 * Resolve the single-page view model once.
	 *
	 * @param int|null $post_id Post ID.
	 * @return array<string,mixed>
	 */
	function aksrt_single_build_context($post_id = null): array {
		$post_id = $post_id ? (int) $post_id : (int) get_the_ID();
		$settings = function_exists('aksrt_resolve_single_post_display_settings')
			? aksrt_resolve_single_post_display_settings($post_id)
			: [];

		$views = function_exists('aksrt_get_post_views') ? (int) aksrt_get_post_views($post_id) : 0;
		$comment_count = (int) get_comments_number($post_id);
		$like_count = function_exists('aksrt_get_post_likes') ? (int) aksrt_get_post_likes($post_id) : 0;
		$favorite_count = function_exists('aksrt_get_post_favorites') ? (int) aksrt_get_post_favorites($post_id) : 0;
		$word_count = function_exists('aksrt_post_word_count') && !empty($settings['word_count_enabled'])
			? aksrt_post_word_count($post_id)
			: 0;
		$reading_minutes = function_exists('aksrt_reading_minutes') && !empty($settings['reading_time_enabled'])
			? aksrt_reading_minutes($post_id)
			: 0;

		// legacy primary meta = comment/views/likes via meta_box_html.
		$meta_items = [];
		$meta_box_html = function_exists('aksrt_get_single_meta_box')
			? aksrt_get_single_meta_box('abs-right', 'down', $post_id)
			: '';
		$meta_items_secondary = [];
		if ($word_count > 0) {
			$meta_items_secondary[] = [
				'icon' => 'fa fas fa-file-word',
				'text' => sprintf(__('约 %s 字', 'aksrt'), number_format_i18n($word_count)),
			];
		}
		if ($reading_minutes > 0) {
			$meta_items_secondary[] = [
				'icon' => 'fa fas fa-hourglass',
				'text' => sprintf(_n('约 %d 分钟', '约 %d 分钟', $reading_minutes, 'aksrt'), $reading_minutes),
			];
		}

		$copyright = trim((string) ($settings['copyright_text'] ?? ''));
		if ($copyright === '') {
			$copyright = sprintf(
				__('本文由 %s 原创发布，转载请注明出处。', 'aksrt'),
				get_the_author_meta('display_name', (int) get_post_field('post_author', $post_id))
			);
		}

		$paid_settings = class_exists('\AKSRT\Settings\Settings') ? \AKSRT\Settings\Settings::get_paid_content_settings() : [];
		$paid_display = is_array($paid_settings['display'] ?? null) ? $paid_settings['display'] : [];
		$paid_box_position = sanitize_key((string) ($paid_display['box_position'] ?? 'top'));
		// legacy positions: box_top | top | bottom | box_bottom (do not collapse).
		if (!in_array($paid_box_position, ['box_top', 'top', 'bottom', 'box_bottom'], true)) {
			$paid_box_position = 'top';
		}

		$show_cover = !empty($settings['show_cover']) && (string) ($settings['cover_url'] ?? '') !== '';
		$pay_meta = function_exists('aksrt_get_pay_meta') ? aksrt_get_pay_meta($post_id) : ['pay_type' => 'no'];
		$pay_type = (string) ($pay_meta['pay_type'] ?? 'no');
		$is_paid_post = function_exists('aksrt_is_paid_post') && aksrt_is_paid_post($post_id);
		// Unpaid reading fragments own their inline purchase card. Once access is
		// granted, the article-level slot shows the canonical purchased card.
		$show_pay_box = $is_paid_post && $pay_type !== 'no';

		$breadcrumbs_html = '';
		if (!empty($settings['breadcrumbs']) && function_exists('aksrt_breadcrumbs')) {
			ob_start();
			aksrt_breadcrumbs(
				(string) ($settings['breadcrumbs_home'] ?? ($settings['breadcrumbs_home_text'] ?? '')),
				['single_text' => !isset($settings['breadcrumbs_single_text']) || !empty($settings['breadcrumbs_single_text'])]
			);
			$breadcrumbs_html = trim((string) ob_get_clean());
		}

		$status_badge = function_exists('aksrt_get_post_status_badge')
			? aksrt_get_post_status_badge($post_id)
			: '';

		$allow_view = function_exists('aksrt_get_post_allow_view_data')
			? aksrt_get_post_allow_view_data($post_id)
			: ['allow' => true];
		if (empty($allow_view['allow'])) {
			// legacy: pay box is skipped when allow_view denies.
			$show_pay_box = false;
		}

		$layout = function_exists('aksrt_get_post_show_layout')
			? aksrt_get_post_show_layout($post_id)
			: '';
		// Do not use wp_is_mobile() as a layout gate. It is User-Agent based and
		// can disagree with the actual viewport (for example, desktop-mode mobile
		// browsers). The responsive stylesheet owns narrow-screen hiding.
		$show_aside = get_post_type($post_id) === 'post'
			&& $layout !== 'no_sidebar'
			&& aksrt_is_show_sidebar();

		return [
			'post_id'           => $post_id,
			'settings'          => $settings,
			'show_cover'        => $show_cover,
		'cover_url'         => (string) ($settings['cover_url'] ?? ''),
			'cover_type'        => (string) ($settings['cover_type'] ?? 'none'),
			'img_scale'         => (int) ($settings['article_image_cover_scale'] ?? 35),
			'video_scale'       => (int) ($settings['article_video_cover_scale'] ?? 56),
			'slide_images'      => array_values(array_filter((array) ($settings['slide_images'] ?? []))),
			'episode_count'     => max(0, (int) ($settings['episode_count'] ?? 0)),
				'video_episodes'    => is_array($settings['video_episodes'] ?? null) ? array_values($settings['video_episodes']) : [],
				'video_poster'      => (string) ($settings['video_poster'] ?? ''),
			'meta_items'        => $meta_items,
			'meta_items_secondary' => $meta_items_secondary,
			'meta_box_html'     => $meta_box_html,
			'title_html'        => function_exists('aksrt_get_single_title_html') ? aksrt_get_single_title_html($post_id) : esc_html(get_the_title($post_id)),
			'allow_view'        => $allow_view,
			'views'             => $views,
			'comment_count'     => $comment_count,
			'like_count'        => $like_count,
			'favorite_count'    => $favorite_count,
			'is_liked'          => function_exists('aksrt_is_post_liked') ? aksrt_is_post_liked($post_id) : false,
			'is_favorited'      => function_exists('aksrt_is_post_favorited') ? aksrt_is_post_favorited($post_id) : false,
			'copyright_text'    => $copyright,
			'front_content'     => (string) ($settings['front_content'] ?? ''),
			'after_content'     => (string) ($settings['after_content'] ?? ''),
			'content_maxheight' => !empty($settings['maxheight_enabled']) ? max(0, (int) ($settings['maxheight'] ?? 0)) : 0,
			'show_pay_box'      => $show_pay_box,
			'pay_type'          => $pay_type,
			'is_paid_post'      => $is_paid_post,
			'paid_box_position' => $paid_box_position,
			'breadcrumbs_html'  => $breadcrumbs_html,
			'status_badge'      => $status_badge,
			'show_aside'        => $show_aside,
		];
	}
endif;

if (!function_exists('aksrt_single_is_docs_page')) :
	/**
	 * Docs fast-path: true when the current post should leave the unified single surface.
	 */
	function aksrt_single_is_docs_page(int $post_id): bool {
		if (!class_exists('\AKSRT\Core\DocsPresenter')) {
			return false;
		}
		return (bool) \AKSRT\Core\DocsPresenter::get_instance()->is_docs_page($post_id);
	}
endif;

if (!function_exists('aksrt_single_render_author_bar')) :
	/**
	 * Render author bar from a real args array (no ambient query vars).
	 *
	 * @param array<string,mixed> $args Partial args.
	 */
	function aksrt_single_render_author_bar(array $args = []): void {
		$args = wp_parse_args($args, [
			'extra_class'  => '',
			'show_actions' => false,
			'show_bio'     => false,
			'meta_items'   => [],
		]);
		get_template_part('templates/parts/single-author-bar', null, $args);
	}
endif;

if (!function_exists('aksrt_single')) :
	/**
	 * Compose header + article + after-box (legacy equivalent).
	 *
	 * @param array<string,mixed>|null $ctx Optional prebuilt context.
	 */
	function aksrt_single(?array $ctx = null): void {
		$ctx = is_array($ctx) ? $ctx : aksrt_single_build_context();

		if (empty($ctx['show_cover'])) {
			if ($ctx['breadcrumbs_html'] !== '') {
				echo $ctx['breadcrumbs_html']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			} elseif (function_exists('aksrt_breadcrumbs')) {
				$settings = is_array($ctx['settings'] ?? null) ? $ctx['settings'] : [];
				aksrt_breadcrumbs(
					(string) ($settings['breadcrumbs_home'] ?? ($settings['breadcrumbs_home_text'] ?? '')),
					['single_text' => !isset($settings['breadcrumbs_single_text']) || !empty($settings['breadcrumbs_single_text'])]
				);
			}
		} else {
			aksrt_single_render_cover($ctx);
		}

		do_action('aksrt_single_before', get_post());
		if (function_exists('aksrt_single_pay_box_matches') && aksrt_single_pay_box_matches($ctx, 'box_top')) {
			aksrt_single_render_pay_box($ctx);
		}
		aksrt_single_render_article($ctx);
		do_action('aksrt_single_article_after', get_post());
		aksrt_single_render_after_box($ctx);
		if (function_exists('aksrt_single_pay_box_matches') && aksrt_single_pay_box_matches($ctx, 'box_bottom')) {
			aksrt_single_render_pay_box($ctx);
		}
		do_action('aksrt_single_after', get_post());
	}
endif;