define(function (require, exports, module) {
	var htmlTemplate = '<section class="message-popup"><div class="message-popup-inner"><b class=""></b> <span></span></div></section>';
	var iconMap = {
		warn: "warning",
		ok: "check",
		error: "times-circle",
		loading: "spinner"
	};

	var MessagePopup = function (type, content, options) {
		var that = this;
		var html = $(htmlTemplate);
		var shown = false;
		options = $.extend({ closeAfter: null }, options);
		$("body").append(html);

		var centerElement = function (ele) {
			ele = ele || html;

			var width = ele.width();
			var height = ele.height();

			ele.css({
				"margin-left": "-" + (width / 2) + "px",
				"margin-top": "-" + (height / 2 - 40) + "px"
			});
		};
		this.show = function () {
			html.animate({ "margin-top": "-=20px", opacity: "1" }, "fast", "linear", function () {
				shown = true;
				if (options.closeAfter) {
					that.delayClose();
				}
			});
		};
		this.close = function () {
			html.animate({ "margin-top": "-=20px", opacity: "hide" }, "fast", "linear", function () {
				html.remove();
			});
		};
		this.delayClose = function (timeout) {
			if (that.shown)
				setTimeout(that.close, timeout || options.closeAfter);
			else {
				options.closeAfter = timeout || options.closeAfter || 1000;
			}
		};
		that.setState = function (type, content) {
			that.type = type;
			that.content = content;
		};
		Object.defineProperties(this, {
			"content": {
				get: function () {
					return html.find("span").html();
				},
				set: function (value) {
					html.find("span").html(value);
					centerElement();
				}
			},
			"type": {
				get: function () {
					return html.attr("data-type");
				},
				set: function (value) {
					html.attr("data-type", value);
					html.removeClass().addClass("message-popup message-popup-" + value);
					html.find("b").removeClass().addClass("fa fa-" + iconMap[value] + (value === "loading" ? " fa-spin" : ""));
				}
			},
			"shown": {
				get: function () {
					return shown;
				}
			}
		});
		this.content = content;
		this.type = type;

		return this;
	};

	exports.MessagePopup = MessagePopup;

	exports.showMessagePopup = function (icon, content, options) {
		options = $.extend({ closeAfter: 1000 }, options);

		var popup = new MessagePopup(icon, content, options);
		popup.show();
		return popup;
	};

	exports.confirm = function (title, content, yes, no) {
		//TODO 确认界面
		if (confirm(content))
			yes && yes();
		else no && no();
	};
	exports.alert = function (title, content, callback) {
		//TODO 确认界面
		alert(content);
		callback && callback();
	};

	//捕捉一些通用的事件
	document.addEventListener("requestSupportError", function () {
		exports.showMessagePopup("error", "无法执行网络请求，似乎没有安装12306订票助手哦。", { closeAfter: null });
	});

});