//此文件实现将控制命令封装成协议，具体协议内容请看：
//链接：http://note.youdao.com/noteshare?id=dabda6c613adef7a416bd2625cd770a1
 
 //bcc校验码计算
 //arry: 要计算的数组
 //返回计算协议中校验位的校验码
 function calBcc(arry)
 {
	var bcc = 0;
	for(i = 0;i < arry.length;i++)
	{
		bcc ^= arry[i];
	}
	return bcc;
 }
 
 //数组打印，调试用
 function PrintArry(data)
 {
	 var str = "";
	 
	 for(i = 0;i < data.length;i++)
	 {
		 str =  str + data[i].toString(16).padStart(2,'0');
	 }
	 
	 str = str.toUpperCase();
	 return str;
 }
 
 //sn:板卡sn号，stirng
 //type：数据类型，数字
 //jsonCmd: json命令
 //返回值：生成一个Uint8Array，通过websocket发送给板卡
 function makeFrame(sn, dataType, jsonCmd)
 {
	 var index = 0;
	 var dataLen  = jsonCmd.length;
	 var frameLen = dataLen + 26;
	 var outPut = new Uint8Array(frameLen);
	 outPut[index++] = 0x68;
	 outPut[index++] = (dataLen & 0xff000000) >> 24;
	 outPut[index++] = (dataLen & 0x00ff0000) >> 16;
	 outPut[index++] = (dataLen & 0x0000ff00) >> 8;
	 outPut[index++] =  dataLen & 0x000000ff;
	 outPut[index++] = 0;//类型为client
	 
	 //sn号赋值，string转ascii
	 for( i = 0;i< sn.length;i++)
	 {
		 outPut[index++] = sn[i].charCodeAt();
	 }
	 
	 outPut[index++] = dataType;//指定数据类型为json
	 //json string转ascii
	 for( i = 0;i< jsonCmd.length;i++)
	 {
		 outPut[index++] = jsonCmd[i].charCodeAt();
	 }
	 
	 var bccBuffer = outPut.slice(1, frameLen-3 + 1);//忽略协议头和协议尾
	 outPut[index++] = calBcc(bccBuffer);
	 outPut[index++] = 0x16;
	 //console.log("打印数组:%s", PrintArry(outPut));
	 // return PrintArry(outPut);
	 return outPut;
 }

 
 //触发键盘事件, code表示键盘值
 function ExexuteKeyDown(code)
 {	 
	 var jsonObj = {"data":{"keyCode":code, "event":"keyCode"}};
	 var json = JSON.stringify(jsonObj);
	 var sn = "RK3923C1201900139";
	 return makeFrame(sn, 0, json);
 }
 //触发鼠标按下事件，x：x坐标， y：y坐标
 function ExexuteMouseDown(x, y)
 {
	 var jsonObj = {"data":{"action":0, "count":1, "pointerId":0,"x":x, "y":y}, "event":"0"};
	 var json = JSON.stringify(jsonObj);
	 var sn = "RK3928C1502005200";
	 return  makeFrame(sn, 0, json);
 }
  //触发鼠标移动事件，x：x坐标， y：y坐标
 function ExexuteMouseMove(x, y)
 {
	 var jsonObj = {"data":{"action":2, "count":1, "pointerId":0,"x":x, "y":y}, "event":"2"};
	 var json = JSON.stringify(jsonObj);
	 var sn = "RK3928C1502005200";
	 return  makeFrame(sn, 0, json);	 
 }
  //触发鼠标抬起事件，x：x坐标， y：y坐标
 function ExexuteMouseUp(x, y)
 {
	 var jsonObj = {"data":{"action":1, "count":1, "pointerId":0,"x":x, "y":y}, "event":"1"};
	 var json = JSON.stringify(jsonObj);
	 var sn = "RK3928C1502005200";
	 return makeFrame(sn, 0, json);	 
 }
  
 function makeFrameExtend(sn, dataType, body)
 {
	 var index = 0;
	 var dataLen  = body.length;
	 var frameLen = dataLen + 26;
	 var outPut = new Uint8Array(frameLen);
	 outPut[index++] = 0x68;
	 outPut[index++] = (dataLen & 0xff000000) >> 24;
	 outPut[index++] = (dataLen & 0x00ff0000) >> 16;
	 outPut[index++] = (dataLen & 0x0000ff00) >> 8;
	 outPut[index++] =  dataLen & 0x000000ff;
	 outPut[index++] = 0;//类型为client
	 
	 //sn号赋值，string转ascii
	 for( i = 0;i< sn.length;i++)
	 {
		 outPut[index++] = sn[i].charCodeAt();
	 }
	 
	 outPut[index++] = dataType;//指定数据类型为json
	 //json string转ascii
	 for( i = 0;i < body.length;i++)
	 {
		 outPut[index++] = body[i];
	 }
	 
	 var bccBuffer = outPut.slice(1, frameLen-3 + 1);//忽略协议头和协议尾
	 outPut[index++] = calBcc(bccBuffer);
	 outPut[index++] = 0x16;
	 var str = PrintArry(outPut);
	 //console.log("打印数组:%s", PrintArry(outPut));
	 //return PrintArry(outPut);
	 return outPut;
 }
 
 //根据报文识别屏幕方向, 0横屏，1竖屏
 function CheckScreenDirection(data)
 {	
	if (data[0] == 0 && data[1] == 0 && data[2] == 0 &&data[3] == 1)
	{
		if (data[4] == 1 && data[5] == 1)
		{
			if (data[6] == 1)
			{
				screen = data[7];
				return screen;
			}
		}
	}	
 }
 
 var emptyCount = 0;
 

 function GetEmptyFrame()
 {
	var emptyFrame = new Uint8Array([0xFF,0xF1,0x50,0x80,0x12,0x5F,0xFC,0x21,0x1A,0xC8,0x01,0x27,0xFC,0xC0,0x00,0x7E,0x03,0x10,0x40,0x63,0x3D,0x77,0xE2,0xB6,0xE3,0x6E,0x00,0x37,0x56,0x78,0xEB,0x70,0xAB,0xC5,0x58,0x08,0x59,0x76,0xF0,0x47,0x3D,0x23,0x6C,0xA6,0x2B,0x59,0x4E,0x9C,0xE0,0x23,0x1C,0x2D,0x74,0xCB,0xE2,0xFC,0x77,0x7D,0x26,0x13,0xC3,0x04,0x40,0x02,0x60,0xF6,0x03,0x20,0x80,0xC7,0x9A,0x11,0x0E,0x9B,0xDA,0xA0,0x84,0x00,0x2A,0x95,0x4A,0x1E,0x74,0xA5,0x40,0x2A,0xCA,0xA8,0xCA,0xF0,0xF2,0x1E,0xA8,0x77,0x86,0xA0,0x62,0x8C,0xB8,0x5F,0xA6,0x67,0xBF,0x0D,0x27,0x8B,0xF9,0x58,0xBD,0xE3,0x2D,0x0C,0xBF,0x48,0x3C,0xFD,0x70,0x78,0x5E,0xA9,0x0B,0x24,0x9C,0x13,0x98,0xA4,0xA0,0x6E,0xCA,0xAA,0x7A,0x88,0xA5,0x0C,0x2E,0x83,0x59,0x02,0x24,0x01,0x41,0x03,0x92,0x10,0x40,0x07])
	return emptyFrame;
 }
 
 //查询屏幕方向
 function GetScreenState()
 {
	var sn = "RK3923C1201900139";
	var outPut = new Uint8Array([0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x02]);
	return makeFrameExtend(sn,  5, outPut);
 }

//通道配置
function ConfigChannel(sn)
{	
	var outPut = new Uint8Array([0x07]);
	return makeFrameExtend(sn, 6, outPut);
}

 //I 帧请求报文生成
 function RequestIFrame()
 {
	 var sn = "RK3923C1201900139";
	 var outPut = new Uint8Array([0x20]);
	 return makeFrameExtend(sn, 6, outPut);
 }