// 小车Demo
(function(ext) {

    var currentBaud = 115200;
    var currentStatus = 1;

    // 当插件退出时要做的事情
    ext._shutdown = function() {};
 
    // 状态描述，用于提示插件的错误信息，比如不支持浏览器及版本等
    ext._getStatus = function() {
        var tmpResult = {status: 1, msg: '等待连接'};
        
        if(currentStatus == 2)
        {
            tmpResult.status = 2;
            tmpResult.msg = '连接成功';
        }
        
        return tmpResult;
    };

   ext.start = function(){        
       $.ajax({
           url:'http://localhost:8800/s',
           data:{
               dt:1
           }
       });
   };

   ext.stop = function(){     
       $.ajax({
           url:'http://localhost:8800/s',
           data:{
               dt:2
           }
       });
   };

    ext.move_forward = function(){
        $.ajax({
            url:'http://localhost:8800/m',
            data:{
                dt:1
            }
        });
    };

    ext.move_backword = function(){
        $.ajax({
            url:'http://localhost:8800/m',
            data:{
                dt:2
            }
        });
    };

    ext.turn_left = function(){
        $.ajax({
            url:'http://localhost:8800/t',
            data:{
                dt:1
            }
        });
    };

    ext.turn_right = function(){
        $.ajax({
            url:'http://localhost:8800/t',
            data:{
                dt:2
            }
        });
    };

	ext.time_delay = function(time){
        $.ajax({
            url:'http://localhost:8800/time',
            data:{
                dt:time
            }
        });
    };

    ext.send_message = function(msg){
        $.ajax({
            url:'http://localhost:8800/msg',
            data:{
                dt:msg
            }
        });
    };

    ext.check_connection = function(){
    };

    ext.get_last_message = function(callback){
        $.ajax({
            url:'http://localhost:8800/m',
            type: "get", 
            async:false,
            contentType:"text/plain",
            data:{
                dt:24
            },
            success:function(msg){
                currentStatus = 2; 
                info = msg;
                callback(info);
            }
        });
    };

    ext.set_baud_rate = function(baudRate){
        return baudRate;
    };

    // 模块描述
    var descriptor = {
        blocks: [
            // 模块类型, 模块名称, 对应方法名称，参数依次对应的默认值
            [' ', '启 动 ', 'start'],
            [' ', '刹 车 ', 'stop'],
            [' ', '向 前 ', 'move_forward'],
            [' ', '向 后 ', 'move_backword'],
            [' ', '左 转 ', 'turn_left'],
            [' ', '右 转 ', 'turn_right'],
			[' ', '延时 %s 秒 ', 'time_delay','1'],
            [' ', '发送数据 %s ', 'send_message','1'],
            ['b', '连接成功', 'check_connection'],
            ['r', '最新接受数据', 'get_last_message'],
            ['r', "波特率: %m.baudRates", 'set_baud_rate', currentBaud]
        ],
        menus:{
            my_first_menu:['one','two','three'],
            baudRates: [9600, 19200, 38400, 57600, 115200]
        },
        url:'https://github.com/Litial/scratch_serial_modules',
        displayName: '小车Demo'
    };
 
    // 注册扩展插件
    ScratchExtensions.register('小车插件', descriptor, ext);
})({});