var base64 = base64 || (function () {
	var base64Map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split('');
	var base64DeMap = !function () {
		var result = {};
		$.each(base64Map, function (i, e) {
			result[e] = i;
		});
		return result;
	}();

	var target = {};
	target.encode = function (data) {
		var buf = [];
		var map = base64Map;
		var n = data.length; //总字节数 
		var val; //中间值 
		var i = 0;

		/* 
		* 3字节 ==> val ==> 4字符 
		*/
		while (i < n) {
			val = (data[i] << 16) |
			(data[i + 1] << 8) |
			(data[i + 2]);

			buf.push(map[val >> 18],
				map[val >> 12 & 63],
				map[val >> 6 & 63],
				map[val & 63]);
			i += 3;
		}

		if (n % 3 == 1) //凑两个"=" 
			buf.pop(), buf.pop(), buf.push('=', '=');
		else //凑一个"=" 
			buf.pop(), buf.push('=');

		return buf.join('');
	};
	target.decode = function (str) {
		var buf = [];
		var arr = str.split('');
		var map = base64DeMap;
		var n = arr.length; //总字符数 
		var val; //中间值 
		var i = 0;

		/* 
		* 长度异常 
		*/
		if (n % 4)
			return null;

		/* 
		* 4字符 ==> val ==> 3字节 
		*/
		while (i < n) {
			val = (map[arr[i]] << 18) |
				(map[arr[i + 1]] << 12) |
				(map[arr[i + 2]] << 6) |
				(map[arr[i + 3]]);

			buf.push(val >> 16,
				val >> 8 & 0xFF,
				val & 0xFF);
			i += 4;
		}

		/* 
		* 凑字字符"="个数 
		*/
		while (arr[--n] == '=')
			buf.pop();

		return buf;
	};
	target.encodeArrayBuffer = function (arrayBuffer) {
		/// <summary>将ArrayBuffer转换为Base64字符串</summary>
		var dv = new DataView(arrayBuffer);
		var length = dv.byteLength;
		var data = [];
		for (var i = 0; i < length; i++) {
			data.push(dv.getUint8(i));
		}
		return base64.encode(data);
	};
	target.toObjectUrl = function (base64str, type) {
		/// <summary>获得指定base64字符串的对象链接格式</summary>
		return "data:" + type + ";base64," + base64str;
	};

	return target;
})();

$(function () {
	//监听ajax事件
	document.addEventListener("ajaxproxy", function (e) {
		var detail = e.detail;
		var data = detail.data;
		var handle = {
			success: null,
			status: null,
			statusText: null,
			url: data.url,
			text: null,
			model: null,
			request: data,
			index: detail.index
		};

		//set header
		data.headers = {
			"Fish-Referer": data.refer || null,
			"Fish-User-Agent": "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)",
			"Fish-Origin": /(https?:\/\/[^/]+\/)/i.exec(data.url)[1]
		};

		$.ajax(data).done(function (result, status, xhr) {
			handle.success = true;
			handle.status = xhr.status;
			handle.statusText = xhr.statusText;
			handle.text = xhr.responseText;
			handle.model = result;

			notifyAjaxComplete(handle);
		}).fail(function (xhr) {
			handle.success = false;
			handle.status = xhr.status;
			handle.statusText = xhr.statusText || "";
			handle.text = xhr.responseText || "";
			handle.model = null;

			notifyAjaxComplete(handle);
		});
		e.preventDefault && e.preventDefault();
		e.stopPropagation && e.stopPropagation();
	});

	var notifyAjaxComplete = function (key) {
		var e = new CustomEvent("ajaxproxyfinished", { detail: key });
		document.dispatchEvent(e);
	};

	document.addEventListener("ajaxLoadVerifyCode", function (e) {
		var ctx = e.detail;

		var xhr = new XMLHttpRequest();
		xhr.open("GET", ctx.url, true);
		xhr.onreadystatechange = function () {
			if (xhr.readyState == 4) {
				if (xhr.status != 200) {
					document.dispatchEvent(new CustomEvent("ajaxproxyfinished", { detail: { url: null, success: false, index: ctx.index } }));
				} else {
					var imgUrl = base64.toObjectUrl(base64.encodeArrayBuffer(xhr.response), "image/jpeg");
					document.dispatchEvent(new CustomEvent("ajaxproxyfinished", { detail: { url: imgUrl, success: true, index: ctx.index } }));
				}
			}
		};
		xhr.responseType = "arraybuffer";
		xhr.setRequestHeader("Fish-Referer", ctx.refer);
		xhr.setRequestHeader("Fish-User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)");
		xhr.setRequestHeader("Fish-Origin", /(https?:\/\/[^/]+\/)/.exec(ctx.url)[1]);
		xhr.send(null);

		e.preventDefault && e.preventDefault();
		e.stopPropagation && e.stopPropagation();
	});

	document.body.dataset["targetExtensionId"] = chrome.runtime.id;
	document.body.dataset["targetExtensionVersion"] = chrome.runtime.getManifest().version;
	document.body.dataset["mobileSupportInitialized"] = 1;
	document.dispatchEvent(new CustomEvent("mobileSupportInitialized"));
});