var randomCode = 0;
var time = 0;
var qrCodeLoginId = 0;
var charList = ['0','1','2','3','4','5','6','7','8','9'
    ,'a','b','c','d','e','f','g'
    ,'h','i','j','k','l','m','n'
    ,'o','p','q','r','s','t'
    ,'u','v','w','x','y','z'];

//二维码登录
function doQrcodeLogin(){
    var loginName = $("#username").val();
    randomCode = getRandcode();
    //弹出二维码
    //doOverLay("加载中。。。");
    $.ajax({
        url:yUrl("/qrCode/createLoginQrCode.do"),
        data:{'loginName':loginName,'qrCodeLogin.randomCode':randomCode},
        dataType:'json',
        cache:false,
        error: function(){
            randomCode = 0;
            closeLay();
            showMessage("页面异常！");
            $('#password').val("");
            closeLay();
            loginImg();
        },
        success: function(data){
            closeLay();
            if(data == 'error'){
                randomCode = 0;
                qrCodeLoginId = 0;
                showMessage("服务器异常！");
                $('#password').val("");
                $("#qrcodeDiv").dialog('destroy').html('');
                loginImg();
            }else{
                var popup = $("#qrcodeDiv");
                var img = $("#img_qrcode");
                if(img.attr('src') == undefined){
                    var imgtemp = '<img id="img_qrcode" src="" />';
                    popup.append(imgtemp);
                    img = $("#img_qrcode");
                }
                $(popup).find("div").empty();
                img.attr('src','data:image/png;base64,' + data.base64QrCode);
                qrCodeLoginId = data.qrCodeLoginId;
                $(popup).dialog({
                    resizable: true,
                    height: 380,
                    width: 250,
                    modal: true,
                    title:'药数立方扫描二维码',
                    close: function(event, ui) {
                        time = 999;//立即停止校验二维码
                        randomCode = 0;
                        qrCodeLoginId = 0;
                        showMessage("已终止二维码验证！");
                        loginImg();
                        $('#password').val("");
                        $(popup).dialog('destroy').html('');
                    },
                    buttons : {
                        "关闭" : function() {
                            time = 999;//立即停止校验二维码
                            randomCode = 0;
                            qrCodeLoginId = 0;
                            showMessage("已终止二维码验证！");
                            loginImg();
                            $('#password').val("");
                            $(popup).dialog('destroy').html('');
                        }
                    }
                });
                //等待扫码二维码
                time = 0;
                scanWaitResult();
            }
        }
    });
}

//生成随机字母或数字
function getRanNum(n) {
    var result = [];
    for (var i = 0; i < n; i++) {
        //生成一个0到35的随机数
        var ranNum = Math.ceil(Math.random() * 35);
        result.push(charList[ranNum]);
    }
    return result.join('');
}

//生成32位随机校验码
function getRandcode() {
    var random1 = getRanNum(8);
    var random2 = getRanNum(4);
    var random3 = getRanNum(4);
    var random4 = getRanNum(4);
    var random5 = getRanNum(12);

    return random1 + '-' + random2 + '-' + random3 + '-' + random4 + '-' + random5;
}

//获取扫描结果
function scanWaitResult(){
    if(time < 30){
        time = time + 1;
        var loginName = $("#username").val();
        $.ajax({
            url : yUrl("/qrCode/checkLoginQrCode.do"),
            data:{
            	'loginName':loginName,
            	'qrCodeLogin.randomCode':randomCode,
            	'qrCodeLogin.id':qrCodeLoginId
            },
            type : "post",
            dataType : 'json',
            async : false,
            cache : false,
            error : function() {
                randomCode = 0;
                qrCodeLoginId = 0;
                showMessage("页面异常！");
                $('#password').val("");
                $("#qrcodeDiv").dialog('destroy').html('');
                loginImg();
                },
            success : function(data) {
                if(data == 'success') {
                    showMessage("验证成功！");
                    $("#qrcodeDiv").dialog('destroy').html('');
                    //开始登录
                    doLogin();
                }else if(data == 'error'){
                    showMessage("验证失败！");
                    $('#password').val("");
                    $("#qrcodeDiv").dialog('destroy').html('');
                    loginImg();
                }else{
                    setTimeout("scanWaitResult()", 2000);
                }
            }
        });
    }else{
        randomCode = 0;
        qrCodeLoginId = 0;
        if(time != 999){
            showMessage("扫码超时，请在1分钟内使用【药数立方】小程序扫描二维码！");
        }
        $("#qrcodeDiv").dialog('destroy').html('');
        $('#password').val("");
        loginImg();
    }
}