define(function (require, exports, module) {
	var ev = require("../platform/EventObject.js");
	var tpl = $("#datebar-template").doT();
	var container = $("ul.date-bar-list");
	var parser = require("../platform/parser.js");
	var utility = require("../utility.js");
	var data = require("../data.js");
	var port = require("../platform/extensionPort.js");

	var getFirstDayOfWeek = function (date) {
		date = utility.toDate(date);
		var day = date.getDay();

		if (day === 1)
			return date;
		var offset = day === 0 ? -6 : 1 - day;
		return utility.addDays(date, offset);
	};
	var formatDate = function (date) {
		var m = date.getMonth() + 1;
		var d = date.getDate();

		return (m < 10 ? "0" : "") + m + "-" + (d < 10 ? "0" : "") + d;
	};
	var getDateString = function (date) {
		return utility.formatDate(date, 'yyyy-MM-dd');
	};

	var WidgetDateBarUi = function () {
		var that = this;
		var today = utility.addDays(new Date(), 0);
		var date = null;
		var maxdays = utility.addDays(today, 30);
		var currentHightDate = today;

		ev.apply(this);

		this.init = function () {
			$("div.date-bar-prev").click(that.goPrev);
			$("div.date-bar-next").click(that.goNext);
			$(document).on("click", "ul.date-bar-list li:not(.disabled):not(.selected)", function () {
				that.fireEvent("requireChangeDate", this.dataset.date);

				//report
				port.track(data.trackTypes.PROFILE_DATEBAR, [this.dataset.date]);
			});

			that.go(today);
		};
		this.go = function (goDate, selectedDate) {
			goDate = utility.toDate(goDate);
			if (selectedDate)
				currentHightDate = utility.toDate(selectedDate);

			var d = getFirstDayOfWeek(goDate);
			if (!date || d.getTime() !== date.getTime()) {
				date = d;
				that.render();
			}
			container.find("li:not(.disabled)").removeClass("selected").filter("[data-date='" + getDateString(currentHightDate) + "']").addClass("selected");
		};
		this.goNext = function () {
			that.go(utility.addDays(date, 7));
		};
		this.goPrev = function () {
			that.go(utility.addDays(date, -7));
		};
		this.render = function () {
			var data = [];
			var namestr = ['周日', '周一', '周二', '周三', '周四', '周五', '周六'];
			for (var i = 0; i < 7; i++) {
				var d = utility.addDays(date, i);

				data.push({
					_date: d,
					name: namestr[d.getDay()],
					date: formatDate(d),
					disabled: d < today || d > maxdays,
					selected: d.getTime() == today.getTime(),
					datecode: getDateString(d)
				});
			}

			container.empty().html(tpl(data));
		};

		Object.defineProperty(this, "current", {
			get: function () {
				return date;
			},
			set: function (value) {
				that.go(getFirstDayOfWeek(value));
			}
		});

		return this;
	};
	WidgetDateBarUi.prototype = Object.create(ev);
	WidgetDateBarUi.constructor = ev;

	return new WidgetDateBarUi();
});