<?php
/**
 * User center helpers.
 *
 * @package AKSRT
 */

defined('ABSPATH') || exit;

if (!function_exists('aksrt_normalize_user_contacts')) {
	/**
	 * Sanitize the editable public contact list.
	 *
	 * @param mixed $raw_contacts Submitted contact rows.
	 * @return array<int, array{name:string,url:string,icon:string}>
	 */
	function aksrt_normalize_user_contacts($raw_contacts): array {
		$contacts = [];
		if (!is_array($raw_contacts)) {
			return $contacts;
		}

		foreach ($raw_contacts as $contact) {
			if (!is_array($contact)) {
				continue;
			}

			$url  = isset($contact['url']) ? esc_url_raw(wp_unslash($contact['url'])) : '';
			$icon = isset($contact['icon']) ? sanitize_key(wp_unslash($contact['icon'])) : '';
			$icon = preg_replace('/^(fab|fas|far)[\s-]*/', '', $icon);
			$icon = preg_replace('/^fa[\s-]*/', '', (string) $icon);
			$icon = trim(preg_replace('/^[\s-]+/', '', (string) $icon), '- ');
			if (!$url || !$icon) {
				continue;
			}

			$contacts[] = [
				'name' => aksrt_icon_key_to_name($icon),
				'url'  => $url,
				'icon' => $icon,
			];
		}

		return $contacts;
	}
}

if (!function_exists('aksrt_save_user_center_profile')) {
	/**
	 * Save the user-center profile form for both AJAX and no-JS requests.
	 *
	 * @param int   $user_id User being updated.
	 * @param array $input   Untrusted request data.
	 * @return true|WP_Error
	 */
	function aksrt_save_user_center_profile(int $user_id, array $input) {
		if (!$user_id || $user_id !== get_current_user_id()) {
			return new WP_Error('aksrt_profile_forbidden', __('无权操作', 'aksrt'));
		}

		$errors = [];
		$update = ['ID' => $user_id];

		if (isset($input['nickname'])) {
			$name = sanitize_text_field(wp_unslash($input['nickname']));
			if (mb_strlen($name) < 1 || mb_strlen($name) > 50) {
				$errors[] = __('昵称长度需在 1-50 字之间', 'aksrt');
			} else {
				$update['display_name'] = $name;
			}
		}

		if (isset($input['description'])) {
			$description = sanitize_textarea_field(wp_unslash($input['description']));
			if (mb_strlen($description) > 500) {
				$errors[] = __('个人简介不能超过 500 字', 'aksrt');
			} else {
				$update['description'] = $description;
			}
		}

		if ($errors) {
			return new WP_Error('aksrt_profile_invalid', implode('<br>', $errors));
		}

		if (count($update) > 1) {
			$result = wp_update_user($update);
			if (is_wp_error($result)) {
				return $result;
			}
		}

		update_user_meta($user_id, 'aksrt_user_contacts', aksrt_normalize_user_contacts($input['contacts'] ?? []));
		return true;
	}
}

if (!function_exists('aksrt_get_user_center_tab_url')) {
	/**
	 * Build a canonical full-page user-center tab URL.
	 */
	function aksrt_get_user_center_tab_url(string $tab): string {
		$url = remove_query_arg([
			'tab', 'posts_page', 'comments_page', 'favorites_page', 'credits_page',
			'post_status', 'saved', 'profile_error',
		], aksrt_get_user_center_url());

		return add_query_arg('tab', sanitize_key($tab), $url);
	}
}

if (!function_exists('aksrt_normalize_user_center_tabs')) {
	/**
	 * Normalize the dashboard tab contract.
	 */
	function aksrt_normalize_user_center_tabs(array $tabs): array {
		$normalized = [];
		foreach ($tabs as $key => $tab) {
			$key = sanitize_key((string) $key);
			if (!$key || !is_array($tab)) {
				continue;
			}
			$normalized[$key] = [
				'label'            => (string) ($tab['label'] ?? $key),
				'icon'             => sanitize_html_class((string) ($tab['icon'] ?? 'circle')),
				'template'         => isset($tab['template']) ? (string) $tab['template'] : '',
				'context_callback' => $tab['context_callback'] ?? null,
			];
		}
		return $normalized;
	}
}

if (!function_exists('aksrt_capture_user_center_view')) {
	/**
	 * Render an internal user-center view into an inert HTML payload.
	 */
	function aksrt_capture_user_center_view(string $view, array $context): string {
		$path = AKSRT_DIR . '/inc/helpers/user-center-renderers/profile-' . sanitize_file_name($view) . '.php';
		if (!is_file($path)) {
			return '';
		}

		ob_start();
		$args = ['context' => $context];
		require $path;
		return (string) ob_get_clean();
	}
}

if (!function_exists('aksrt_capture_user_center_panel')) {
	/**
	 * Capture a built-in or registered user-center panel body.
	 */
	function aksrt_capture_user_center_panel(string $tab_key, array $tab, array $context): string {
		$built_in_tabs = ['profile', 'posts', 'comments', 'favorites', 'credits', 'settings'];
		if (in_array($tab_key, $built_in_tabs, true)) {
			return aksrt_capture_user_center_view($tab_key, $context);
		}

		$panel_context = $context;
		if (is_callable($tab['context_callback'] ?? null)) {
			$custom_context = call_user_func($tab['context_callback'], $context, $tab_key);
			if (is_array($custom_context)) {
				$panel_context = array_merge($panel_context, $custom_context);
			}
		}

		$template = ltrim((string) ($tab['template'] ?? ''), '/');
		if ($template === '') {
			return '';
		}

		$template_path = locate_template([$template . '.php', $template], false, false);
		if (!$template_path) {
			return '';
		}

		ob_start();
		load_template($template_path, false, ['context' => $panel_context]);
		return (string) ob_get_clean();
	}
}

if (!function_exists('aksrt_build_user_center_render_context')) {
	/**
	 * Assemble all runtime data before template parts are entered.
	 */
	function aksrt_build_user_center_render_context(array $context): array {
		$active_tab = (string) ($context['active_tab'] ?? 'profile');
		$context['header_html'] = aksrt_capture_user_center_view('header', $context);
		$context['sidebar_html'] = aksrt_capture_user_center_view('sidebar', $context);
		$context['mobile_tabs'] = [];
		foreach ((array) ($context['dashboard_tabs'] ?? []) as $tab_key => $tab) {
			$context['mobile_tabs'][] = [
				'key'       => (string) $tab_key,
				'label'     => (string) ($tab['label'] ?? $tab_key),
				'url'       => aksrt_get_user_center_tab_url((string) $tab_key),
				'is_active' => $active_tab === $tab_key,
			];
		}

		$context['panels'] = [];
		foreach ((array) ($context['dashboard_tabs'] ?? []) as $tab_key => $tab) {
			$context['panels'][$tab_key] = [
				'key'       => (string) $tab_key,
				'url'       => aksrt_get_user_center_tab_url((string) $tab_key),
				'is_active' => $active_tab === $tab_key,
				'is_loaded' => $active_tab === $tab_key,
				'html'      => $active_tab === $tab_key
					? aksrt_capture_user_center_panel((string) $tab_key, (array) $tab, $context)
					: '',
			];
		}

		$context['account_modals_html'] = 'settings' === $active_tab
			? aksrt_capture_user_center_view('account-modals', $context)
			: '';
		return $context;
	}
}

if (!function_exists('aksrt_get_user_center_render_context')) {
	/**
	 * Resolve the current user's complete render context outside template files.
	 */
	function aksrt_get_user_center_render_context(WP_User $current_user): array {
		$user_id = (int) $current_user->ID;
		$user_center_settings = class_exists('AKSRT_Settings')
			? AKSRT_Settings::get_user_center_settings()
			: [
				'tabs'          => ['profile', 'posts', 'comments', 'favorites'],
				'avatar_upload' => true,
				'cover_upload'  => true,
				'social_links'  => true,
			];
		$dashboard_tabs = class_exists('AKSRT_User_Center')
			? AKSRT_User_Center::get_instance()->get_dashboard_tabs()
			: [
				'profile'   => ['label' => __('个人信息', 'aksrt'), 'icon' => 'user'],
				'posts'     => ['label' => __('我的文章', 'aksrt'), 'icon' => 'file-alt'],
				'comments'  => ['label' => __('我的评论', 'aksrt'), 'icon' => 'comment'],
				'favorites' => ['label' => __('我的收藏', 'aksrt'), 'icon' => 'star'],
				'settings'  => ['label' => __('账号设置', 'aksrt'), 'icon' => 'cog'],
			];
		$dashboard_tabs = aksrt_normalize_user_center_tabs($dashboard_tabs);
		$dashboard_tab_keys = array_keys($dashboard_tabs);
		$default_dashboard_tab = in_array('profile', $dashboard_tab_keys, true) ? 'profile' : ($dashboard_tab_keys[0] ?? 'profile');
		$active_tab = isset($_GET['tab']) ? sanitize_key(wp_unslash($_GET['tab'])) : $default_dashboard_tab;
		if ('signin' === $active_tab) {
			$active_tab = 'credits';
		} elseif ('invite' === $active_tab) {
			$active_tab = 'settings';
		}
		if (!in_array($active_tab, $dashboard_tab_keys, true)) {
			$active_tab = $default_dashboard_tab;
		}

		$dashboard = function_exists('aksrt_get_user_dashboard_view')
			? aksrt_get_user_dashboard_view($user_id, [
				'viewer_id'            => $user_id,
				'include_recent_posts' => false,
				'include_governance'   => false,
			])
			: [];
		$target_user = $current_user;
		$post_count = (int) ($dashboard['post_count'] ?? count_user_posts($user_id, 'post', true));
		$comment_count = (int) ($dashboard['comment_count'] ?? get_comments(['user_id' => $user_id, 'count' => true, 'status' => 'approve']));
		$favorite_post_ids = $dashboard['favorite_post_ids'] ?? [];
		$favorite_count = (int) ($dashboard['favorite_count'] ?? count($favorite_post_ids));
		$user_contacts = $dashboard['user_contacts'] ?? get_user_meta($user_id, 'aksrt_user_contacts', true);
		$user_contacts = is_array($user_contacts) ? $user_contacts : [];
		$profile_signals = $dashboard['profile_signals'] ?? [];
		$user_background_url = (string) ($dashboard['background_url'] ?? get_user_meta($user_id, 'aksrt_background_image', true));
		$allow_bg_upload = !empty($user_center_settings['cover_upload']) && class_exists('AKSRT_Settings') && aksrt_get_setting('allow_background_upload', false);
		$show_avatar_edit = !empty($user_center_settings['avatar_upload']);
		$avatar_settings_url = admin_url('profile.php');
		$notification_unread_count = function_exists('aksrt_get_user_unread_notification_count') ? aksrt_get_user_unread_notification_count($user_id) : 0;
		$messages_url = function_exists('aksrt_get_messages_url')
			? aksrt_get_messages_url()
			: aksrt_get_user_center_url('notif');
		$per_page = 10;
		$posts_page = max(1, isset($_GET['posts_page']) ? (int) $_GET['posts_page'] : 1);
		$comments_page = max(1, isset($_GET['comments_page']) ? (int) $_GET['comments_page'] : 1);
		$favorites_page = max(1, isset($_GET['favorites_page']) ? (int) $_GET['favorites_page'] : 1);
		$post_status_filter = isset($_GET['post_status']) ? sanitize_key(wp_unslash($_GET['post_status'])) : 'publish';
		if (!in_array($post_status_filter, ['all', 'publish', 'draft', 'pending', 'private'], true)) {
			$post_status_filter = 'publish';
		}
		$user_status_counts = ['publish' => 0, 'draft' => 0, 'pending' => 0, 'private' => 0];
		if ('posts' === $active_tab) {
			global $wpdb;
			$rows = $wpdb->get_results($wpdb->prepare(
				"SELECT post_status, COUNT(*) AS num FROM {$wpdb->posts} WHERE post_author = %d AND post_type = 'post' AND post_status IN ('publish','draft','pending','private') GROUP BY post_status",
				$user_id
			));
			foreach ((array) $rows as $row) {
				$user_status_counts[$row->post_status] = (int) $row->num;
			}
			$post_count = (int) array_sum($user_status_counts);
		}

		$svg_empty_post = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/><path d="M14 2v6h6"/></svg>';
		$svg_empty_comment = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5"><path d="M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z"/></svg>';
		$svg_empty_favorite = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5"><polygon points="12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2"/></svg>';
		require_once AKSRT_DIR . '/templates/parts/user-shared-helpers.php';

		$vip_settings = class_exists('AKSRT_Settings') ? AKSRT_Settings::get_payment_vip_settings() : [];
		$affiliate_settings = class_exists('AKSRT_Settings') ? AKSRT_Settings::get_payment_affiliate_settings() : [];
		$orders_url = function_exists('aksrt_get_orders_page_url') ? aksrt_get_orders_page_url() : '';
		$show_vip = !empty($vip_settings['enabled']);
		$show_credit_tabs = (bool) ($dashboard['credits_enabled'] ?? false);
		$affiliate_enabled = $show_credit_tabs && !empty($affiliate_settings['enabled']);
		$currency_name = (string) ($dashboard['currency_name'] ?? __('积分', 'aksrt'));
		$tab_urls = [];
		foreach ($dashboard_tab_keys as $tab_key) {
			$tab_urls[$tab_key] = aksrt_get_user_center_tab_url($tab_key);
		}

		$render_context = [
			'user_center_settings' => $user_center_settings,
			'dashboard_tabs' => $dashboard_tabs,
			'dashboard_tab_keys' => $dashboard_tab_keys,
			'default_dashboard_tab' => $default_dashboard_tab,
			'active_tab' => $active_tab,
			'dashboard' => $dashboard,
			'target_user' => $target_user,
			'user_id' => $user_id,
			'post_count' => $post_count,
			'comment_count' => $comment_count,
			'favorite_post_ids' => $favorite_post_ids,
			'favorite_count' => $favorite_count,
			'user_contacts' => $user_contacts,
			'profile_signals' => $profile_signals,
			'user_background_url' => $user_background_url,
			'allow_bg_upload' => $allow_bg_upload,
			'show_avatar_edit' => $show_avatar_edit,
			'avatar_settings_url' => $avatar_settings_url,
			'notification_unread_count' => $notification_unread_count,
			'messages_url' => $messages_url,
			'per_page' => $per_page,
			'posts_page' => $posts_page,
			'comments_page' => $comments_page,
			'favorites_page' => $favorites_page,
			'post_status_filter' => $post_status_filter,
			'user_status_counts' => $user_status_counts,
			'svg_empty_post' => $svg_empty_post,
			'svg_empty_comment' => $svg_empty_comment,
			'svg_empty_favorite' => $svg_empty_favorite,
			'orders_url' => $orders_url,
			'show_vip' => $show_vip,
			'show_credit_tabs' => $show_credit_tabs,
			'affiliate_enabled' => $affiliate_enabled,
			'currency_name' => $currency_name,
			'credit_balance' => (float) ($dashboard['credit_balance'] ?? 0.0),
			'credits_enabled' => $show_credit_tabs,
			'vip_settings' => $vip_settings,
			'show_invite_section' => $show_credit_tabs
				&& class_exists('AKSRT_Settings')
				&& AKSRT_Settings::invite_enabled()
				&& AKSRT_Settings::invite_registration_enabled(),
			'user_email' => (string) $current_user->user_email,
		];
		$render_context['runtime_config'] = [
			'ajaxUrl'       => admin_url('admin-ajax.php'),
			'publicNonce'   => wp_create_nonce('aksrt_public_nonce'),
			'settingsNonce' => wp_create_nonce('aksrt_account_settings'),
			'userId'        => $user_id,
			'defaultTab'    => $default_dashboard_tab,
			'activeTab'     => $active_tab,
			'tabAliases'    => ['signin' => 'credits', 'invite' => 'settings'],
			'tabUrls'       => $tab_urls,
			'i18n'          => [
				'contactUrlPlaceholder' => __('链接 URL', 'aksrt'),
				'deleteLabel'            => __('删除', 'aksrt'),
				'saving'                 => __('保存中…', 'aksrt'),
				'saveBtn'                => __('保存修改', 'aksrt'),
				'saved'                  => __('已保存', 'aksrt'),
				'saveFailed'             => __('保存失败', 'aksrt'),
				'networkError'           => __('网络错误，请重试', 'aksrt'),
				'confirmUnfavorite'      => __('确定取消收藏这篇文章？', 'aksrt'),
				'unfavorited'            => __('已取消收藏', 'aksrt'),
				'operationFailed'        => __('操作失败', 'aksrt'),
				'confirmUnbind'          => __('确定解除绑定?', 'aksrt'),
				'unbinding'              => __('解除中...', 'aksrt'),
				'unbindSuccess'          => __('解除成功', 'aksrt'),
				'unbindFailed'           => __('解除失败', 'aksrt'),
				'unbind'                 => __('解除', 'aksrt'),
			],
		];
		$render_context['cover_upload_config'] = $allow_bg_upload ? [
			'enabled'          => true,
			'restUrl'          => rest_url('aksrt/v1/user/background'),
			'restNonce'        => wp_create_nonce('wp_rest'),
			'buttonId'         => 'aksrt-upload-bg-btn',
			'inputId'          => 'aksrt-bg-file-input',
			'imageId'          => 'aksrt-cover-img',
			'fieldName'        => 'background',
			'maxSize'          => 2097152,
			'fallbackImage'    => AKSRT_URI . '/assets/img/person_background.png',
			'idleText'         => __('编辑', 'aksrt'),
			'loadingText'      => __('上传中…', 'aksrt'),
			'tooLargeText'     => __('图片大小不能超过 2MB', 'aksrt'),
			'successText'      => __('背景图已更新', 'aksrt'),
			'errorText'        => __('上传失败', 'aksrt'),
			'networkErrorText' => __('网络错误，请重试', 'aksrt'),
		] : [];
		$render_context = aksrt_build_user_center_render_context($render_context);

		return $render_context;
	}
}