define(function (require, exports, module) {
	var data = require("../data.js");
	var utility = require("../utility.js");
	var storage = require("../platform/storage.js");
	var loadUrl = data.sysNoticeUrl;
	var savedNotice = JSON.parse(storage.get("systemNotice") || "{}");
	var unreadNotice = null;
	var noticeTemplate = $("#search_tips_template").doT();
	var port = require("../platform/extensionPort.js");

	var loadSystemNotice = function () {
		$.post(loadUrl).done(function (json) {
			var nowDate = new Date().getTime();
			json.lastLoad = new Date().getTime();
			if (savedNotice.lastReadId) {
				var takeCounter = 0;
				json.items = _.filter(json.items, function (i) {
					return (!i.expiresTime || nowDate > i.expiresTime) && (!savedNotice.lastReadId || savedNotice.lastReadId < i.id || (takeCounter++ < data.sysNoticeMaxShowCount));
				});
				json.lastReadId = savedNotice.lastReadId;
			}
			savedNotice = json;
			unreadNotice = _.filter(savedNotice.items, function (s) {
				return !savedNotice.lastReadId || savedNotice.lastReadId < s.id;
			});
			renderUnreadNotice();
			storage.put("systemNotice", savedNotice);

			//定时器
			setTimeout(loadSystemNotice, data.sysNoticeLoadInterval);
			port.track(data.trackTypes.LOAD_SYS_NOTICE);
		});
	};

	var renderUnreadNotice = function () {
		if (unreadNotice && unreadNotice.length) {
			$(".search-tips-container").html(noticeTemplate(unreadNotice));
			$("#index-tip-body").find(".order-num").html(unreadNotice.length).show();
		} else {
			$("#index-tip-body").find(".order-num").html("0").hide();
			//取最新的几条通知
			var shownNotice = _.first(savedNotice.items, data.sysNoticeMaxShowCount);
			if (!shownNotice.length) {
				shownNotice = [{ title: "暂时没有系统公告" }];
			}
			$(".search-tips-container").html(noticeTemplate(shownNotice));
		}
	};

	var resetUnreadItems = function () {
		unreadNotice = null;
		renderUnreadNotice();
	};
	var closeNotice = function () {
		$("section.search-tips-container").fadeOut();
		if (!savedNotice || !savedNotice.items) return;

		if (savedNotice.items.length)
			savedNotice.lastReadId = savedNotice.items[0].id;
		else savedNotice.lastReadId = 0;
		resetUnreadItems();
	};

	//是否需要立刻刷新通知？
	if (!savedNotice.lastLoad || (new Date().getTime() - savedNotice.lastLoad) > 1000 * 60 * 30) {
		loadSystemNotice();
	} else {
		unreadNotice = _.filter(savedNotice.items, function (s) {
			return savedNotice.lastReadId < s.id;
		});
		renderUnreadNotice();
		var nextTime = Math.min(savedNotice.lastLoad ? new Date() - savedNotice.lastLoad : data.sysNoticeLoadInterval, data.sysNoticeLoadInterval);
		setTimeout(loadSystemNotice, nextTime);
	}

	$("#index-tip-body").click(function (e) {
		$(this).next().fadeIn();
		e.stopPropagation();

		port.track(data.trackTypes.OPEN_SYS_NOTICE);
	});
	$(document).on("click", "section.search-tips-container i.fa-times", function () {
		closeNotice();
	}).on("click", ".search-tips-container", function (e) {
		e.preventDefault();
		e.stopPropagation();
	}).on("click", function () {
		closeNotice();
	});

});