/**
 * AKSRT User Home — 公开用户主页专属脚本
 *
 * 负责公开主页 Tab 切换和 URL 同步。
 */

(function() {
	'use strict';

	function initUserHomeTabs() {
		var tabContainer = document.querySelector('.dashboard--public .dashboard-tabs');
		if (!tabContainer) return;

		var tabs = tabContainer.querySelectorAll('[data-tab]');
		var panels = {};
		var defaultTab = tabs.length ? tabs[0].getAttribute('data-tab') : 'posts';

		tabs.forEach(function(tab) {
			var name = tab.getAttribute('data-tab');
			var panel = document.getElementById('panel-' + name);
			if (panel) {
				panels[name] = { tab: tab, panel: panel };
			}
		});

		function switchTo(name) {
			if (!panels[name]) name = defaultTab;

			Object.keys(panels).forEach(function(key) {
				var active = key === name;
				panels[key].tab.classList.toggle('is-active', active);
				panels[key].tab.setAttribute('aria-selected', active ? 'true' : 'false');
				panels[key].panel.classList.toggle('is-active', active);
				panels[key].panel.hidden = !active;
			});
		}

		function tabFromUrl() {
			var m = window.location.search.match(/[?&]tab=([^&]+)/);
			return m ? decodeURIComponent(m[1]) : defaultTab;
		}

		function updateUrl(name) {
			if (!window.history.replaceState) return;
			var u = new URL(window.location);
			if (name === defaultTab) {
				u.searchParams.delete('tab');
			} else {
				u.searchParams.set('tab', name);
			}
			window.history.replaceState({}, '', u);
		}

		tabs.forEach(function(tab) {
			tab.addEventListener('click', function() {
				var name = this.getAttribute('data-tab');
				switchTo(name);
				updateUrl(name);
			});
		});

		switchTo(tabFromUrl());
	}

	if (document.readyState === 'loading') {
		document.addEventListener('DOMContentLoaded', initUserHomeTabs);
	} else {
		initUserHomeTabs();
	}
})();