<?php
/**
 * Public user-home template context builder.
 *
 * Keeps page-user-home.php as a thin shell that only mounts parts.
 *
 * @package AKSRT
 */

defined('ABSPATH') || exit;

if (!function_exists('aksrt_get_user_home_page_context')) {
	/**
	 * Build the render context for the public user homepage shell.
	 *
	 * @param WP_User $user Target user.
	 * @return array<string, mixed>
	 */
	function aksrt_get_user_home_page_context(WP_User $user): array {
		$user_id = (int) $user->ID;

		$dashboard = function_exists('aksrt_get_user_dashboard_view')
			? aksrt_get_user_dashboard_view($user_id, ['viewer_id' => get_current_user_id()])
			: [];

		$is_own_profile = !empty($dashboard['is_own_profile']);
		$user_home_settings = class_exists('\AKSRT\Settings\Settings')
			? \AKSRT\Settings\Settings::get_user_home_settings()
			: [
				'tabs'           => ['posts', 'favorites', 'comments', 'follow'],
				'sidebar'        => false,
				'cover'          => true,
				'follow'         => true,
				'posts_per_page' => 10,
			];

		$post_count        = (int) ($dashboard['post_count'] ?? 0);
		$comment_count     = (int) ($dashboard['comment_count'] ?? 0);
		$favorite_post_ids = $dashboard['favorite_post_ids'] ?? [];
		$favorite_count    = (int) ($dashboard['favorite_count'] ?? 0);
		$profile_details   = $dashboard['profile_details'] ?? [];
		$per_page          = max(1, (int) ($user_home_settings['posts_per_page'] ?? 10));
		$credits_enabled   = !empty($dashboard['credits_enabled']);
		$credit_balance    = $dashboard['credit_balance'] ?? 0.0;
		$currency_name     = $dashboard['currency_name'] ?? __('积分', 'aksrt');

		$user_home_manager = class_exists('\AKSRT\User\Home') ? \AKSRT\User\Home::get_instance() : null;
		$visible_tabs = $user_home_manager ? $user_home_manager->get_visible_tabs($is_own_profile) : [];

		$enabled_tabs = array_keys($visible_tabs);
		if (empty($enabled_tabs)) {
			$enabled_tabs = ['posts', 'comments', 'favorites'];
		}

		// Apply admin-configured display order.
		$order = $user_home_settings['tabs_order'] ?? [];
		$ordered = [];
		foreach ((array) $order as $tab_key) {
			if (in_array($tab_key, $enabled_tabs, true)) {
				$ordered[] = $tab_key;
			}
		}
		foreach ($enabled_tabs as $tab_key) {
			if (!in_array($tab_key, $ordered, true)) {
				$ordered[] = $tab_key;
			}
		}
		$enabled_tabs = $ordered;

		$pc_hide     = $user_home_settings['tabs_pc_hide'] ?? [];
		$mobile_hide = $user_home_settings['tabs_mobile_hide'] ?? [];
		$enabled_tabs_pc = array_values(array_diff($enabled_tabs, (array) $pc_hide));
		$enabled_tabs_mobile = array_values(array_diff($enabled_tabs, (array) $mobile_hide));
		$is_mobile = function_exists('wp_is_mobile') && wp_is_mobile();
		$display_tabs = $is_mobile ? $enabled_tabs_mobile : $enabled_tabs_pc;
		$default_tab = !empty($display_tabs) ? $display_tabs[0] : $enabled_tabs[0];

		$empty_svgs = aksrt_empty_state_svgs();

		$follow_count = 0;
		if (class_exists('\AKSRT\User\Follow')) {
			$follow_count = (int) \AKSRT\User\Follow::get_instance()->get_follower_count($user_id);
		}

		$tab_counts = [
			'posts'     => $post_count,
			'comments'  => $comment_count,
			'favorites' => $favorite_count,
			'credits'   => $credits_enabled && $is_own_profile ? (int) round((float) $credit_balance) : 0,
			'follow'    => $follow_count,
		];

		$tab_labels = [
			'posts'     => __('文章', 'aksrt'),
			'comments'  => __('评论', 'aksrt'),
			'favorites' => __('收藏', 'aksrt'),
			'credits'   => sprintf(__('我的%s', 'aksrt'), $currency_name),
			'follow'    => __('粉丝', 'aksrt'), // legacy: 粉丝
		];
		foreach ($visible_tabs as $tab_key => $tab_config) {
			if (!empty($tab_config['label'])) {
				$tab_labels[$tab_key] = (string) $tab_config['label'];
			}
		}

		$active_tab = $default_tab;

		$home_url = function_exists('aksrt_get_user_home_url') ? aksrt_get_user_home_url($user) : home_url('/');

		return [
			'user'                 => $user,
			'user_id'              => $user_id,
			'dashboard'            => $dashboard,
			'is_own_profile'       => $is_own_profile,
			'user_home_settings'   => $user_home_settings,
			'profile_details'      => $profile_details,
			'post_count'           => $post_count,
			'comment_count'        => $comment_count,
			'favorite_post_ids'    => $favorite_post_ids,
			'favorite_count'       => $favorite_count,
			'per_page'             => $per_page,
			'credits_enabled'      => $credits_enabled,
			'credit_balance'       => $credit_balance,
			'currency_name'        => $currency_name,
			'enabled_tabs'         => $enabled_tabs,
			'tabs_pc_hide'         => (array) $pc_hide,
			'tabs_mobile_hide'     => (array) $mobile_hide,
			'default_tab'          => $default_tab,
			'active_tab'           => $active_tab,
			'tab_counts'           => $tab_counts,
			'tab_labels'           => $tab_labels,
			'home_url'             => $home_url,
			'posts_page'           => 1,
			'comments_page'        => 1,
			'favorites_page'       => 1,
			'follow_sub'           => 'followers',
			'follow_page'          => 1,
			'svg_empty_post'       => $empty_svgs['post'],
			'svg_empty_comment'    => $empty_svgs['comment'],
			'svg_empty_favorite'   => $empty_svgs['favorite'],
			'svg_empty_follow'     => $empty_svgs['follow'],
		];
	}
}

if (!function_exists('aksrt_render_user_home_pagination')) {
	/**
	 * 渲染公开用户主页面板的无刷新数字分页（按钮驱动，无 URL 参数）。
	 *
	 * 复用 .profile-pagination / .page-numbers 既有样式契约。
	 *
	 * @param int $total_pages 总页数。
	 * @param int $current     当前页。
	 */
	function aksrt_render_user_home_pagination(int $total_pages, int $current): void {
		$total_pages = max(1, $total_pages);
		$current = min(max(1, $current), $total_pages);
		if ($total_pages <= 1) {
			return;
		}

		$items = [];
		for ($i = 1; $i <= $total_pages; $i++) {
			if ($i === 1 || $i === $total_pages || abs($i - $current) <= 1) {
				$items[] = (string) $i;
			} elseif ($items && end($items) !== '…') {
				$items[] = '…';
			}
		}

		echo '<nav class="profile-pagination uh-pagination" aria-label="' . esc_attr__('分页', 'aksrt') . '">';
		if ($current > 1) {
			echo '<button type="button" class="page-numbers" data-uh-page="' . esc_attr((string) ($current - 1)) . '"><span aria-hidden="true">&lsaquo;</span><span class="screen-reader-text">' . esc_html__('上一页', 'aksrt') . '</span></button>';
		}
		foreach ($items as $item) {
			if ($item === '…') {
				echo '<span class="page-numbers dots">&hellip;</span>';
				continue;
			}
			if ((int) $item === $current) {
				echo '<span class="page-numbers current" aria-current="page">' . esc_html($item) . '</span>';
				continue;
			}
			echo '<button type="button" class="page-numbers" data-uh-page="' . esc_attr($item) . '">' . esc_html($item) . '</button>';
		}
		if ($current < $total_pages) {
			echo '<button type="button" class="page-numbers" data-uh-page="' . esc_attr((string) ($current + 1)) . '"><span aria-hidden="true">&rsaquo;</span><span class="screen-reader-text">' . esc_html__('下一页', 'aksrt') . '</span></button>';
		}
		echo '</nav>';
	}
}

if (!function_exists('aksrt_get_user_home_follow_placeholder')) {
	/**
	 * Skeleton cards used while the public home follow panel is loading.
	 * Mirrors zib_get_author_tab_loader('follow').
	 */
	function aksrt_get_user_home_follow_placeholder(): string {
		$item = '<div class="author-minicard radius8 flex ac uh-follow__placeholder" aria-hidden="true">'
			. '<div class="avatar-img mr10"><div class="avatar placeholder"></div></div>'
			. '<div class="flex1"><div class="placeholder k1 mb6"></div>'
			. '<i><i class="placeholder s1"></i><i class="placeholder s1 ml10"></i></i></div></div>';

		return '<div class="uh-follow__list uh-follow__list--placeholder" role="status" aria-label="' . esc_attr__('正在加载', 'aksrt') . '">'
			. str_repeat($item, 6)
			. '</div>';
	}
}

if (!function_exists('aksrt_capture_user_home_panel')) {
	/**
	 * 捕获公开用户主页面板 body（templates/parts/user-home/panel-{tab}.php）。
	 *
	 * @param string $tab     面板键名。
	 * @param array<string, mixed> $ctx aksrt_get_user_home_page_context() 上下文。
	 * @return string 捕获的 HTML，模板不存在时为空串。
	 */
	function aksrt_capture_user_home_panel(string $tab, array $ctx): string {
		$template = locate_template(['templates/parts/user-home/panel-' . sanitize_key($tab) . '.php'], false, false);
		if (!$template) {
			return '';
		}

		// 面板 body 依赖的空态/分页助手位于模板侧共享文件，REST 片段上下文不会自动加载。
		if (!function_exists('aksrt_render_profile_empty')) {
			require_once AKSRT_DIR . '/templates/parts/user-shared-helpers.php';
		}

		ob_start();
		load_template($template, false, $ctx);
		return (string) ob_get_clean();
	}
}