/**
 * AKSRT Footer Tabbar
 */
(function () {
	"use strict";

	function initFooterTabbar() {
		var tabbar = document.getElementById("footer-tabbar");
		if (!tabbar || tabbar.dataset.aksrtTabbarInit === "1") return;
		tabbar.dataset.aksrtTabbarInit = "1";
		var addBackdrop = document.getElementById("tabbar-add-backdrop");

		var ticking = false;
		var scrollThreshold = 100;
		var isHidden = false;

		// Use body scroll bus classes from runtime/main.js
		function handleScrollDownHide() {
			var body = document.body;
			var scrollTop = window.pageYOffset || document.documentElement.scrollTop;

			if (scrollTop > scrollThreshold) {
				if (body.classList.contains("scroll-down") && !isHidden) {
					// 向下滚动 - 隐藏
					tabbar.classList.add("is-hidden");
					isHidden = true;
				} else if (body.classList.contains("scroll-up") && isHidden) {
					tabbar.classList.remove("is-hidden");
					isHidden = false;
				}
			} else {
				tabbar.classList.remove("is-hidden");
				isHidden = false;
			}
		}

		// 返回顶部按钮切换
		function handleOntopWrap() {
			var ontopWraps = tabbar.querySelectorAll(".tabbar-ontop-wrap");
			var scrollTop = window.pageYOffset || document.documentElement.scrollTop;

			ontopWraps.forEach(function (wrap) {
				if (scrollTop > scrollThreshold) {
					wrap.classList.add("is-scrolled");
				} else {
					wrap.classList.remove("is-scrolled");
				}
			});
		}

		// 滚动事件处理
		function onScroll() {
			if (!ticking) {
				requestAnimationFrame(function () {
					if (tabbar.classList.contains("scroll-down-hide")) {
						handleScrollDownHide();
					}
					handleOntopWrap();
					ticking = false;
				});
				ticking = true;
			}
		}

		window.addEventListener("scroll", onScroll, { passive: true });

		function closeAddPanels() {
			document.querySelectorAll(".tabbar-add-panel").forEach(function (panel) {
				panel.setAttribute("hidden", "");
			});
			if (addBackdrop) addBackdrop.setAttribute("hidden", "");
			document.body.classList.remove("tabbar-add-open");
		}

		function openAddPanel(panelId) {
			closeAddPanels();
			var panel = document.getElementById(panelId);
			if (!panel) return;
			panel.removeAttribute("hidden");
			if (addBackdrop) addBackdrop.removeAttribute("hidden");
			document.body.classList.add("tabbar-add-open");
		}

		if (addBackdrop) {
			addBackdrop.addEventListener("click", closeAddPanels);
		}

		document.addEventListener("keydown", function (e) {
			if (e.key === "Escape") closeAddPanels();
		});

		// 返回顶部点击事件 + 双击首页刷新
		var homeClickTimer = null;
		tabbar.addEventListener("click", function (e) {
			var addBtn = e.target.closest('.tabbar-item[data-type="add"]');
			if (addBtn) {
				e.preventDefault();
				openAddPanel(addBtn.getAttribute("data-panel-id"));
				return;
			}

			var searchBtn = e.target.closest('.tabbar-item[data-type="search"]');
			if (searchBtn) {
				e.preventDefault();
				if (typeof window.__aksrtOpenSearchPanel === "function") {
					window.__aksrtOpenSearchPanel();
				}
				return;
			}

			var ontopBtn = e.target.closest(".tabbar-ontop-btn");
			if (ontopBtn) {
				e.preventDefault();
				window.scrollTo({ top: 0, behavior: "smooth" });
				return;
			}

			// 双击首页Tab刷新页面
			var homeBtn = e.target.closest('.tabbar-item[data-type="home"]');
			if (homeBtn && tabbar.classList.contains("has-animation")) {
				if (homeClickTimer) {
					clearTimeout(homeClickTimer);
					homeClickTimer = null;
					window.location.reload();
					return;
				}
				homeClickTimer = setTimeout(function () {
					homeClickTimer = null;
				}, 350);
			}
		});

		document.addEventListener("click", function (e) {
			if (e.target.closest("[data-close-tabbar-add-panel]")) {
				closeAddPanels();
			}
		});
	}

	if (document.readyState === "loading") {
		document.addEventListener("DOMContentLoaded", initFooterTabbar);
	} else {
		initFooterTabbar();
	}
})();