window.isBusy = false;

// 创建验证码
function createCode() {
    var codeLength = 4, code = ""; // 验证码的长度
    var checkCode = document.getElementById("checkCode");

    var codeChars = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
    for (var i = 0; i < codeLength; i++) {
        var charNum = Math.floor(Math.random() * 10);
        code += codeChars[charNum];
    }
    if (checkCode) {
        checkCode.innerHTML = code;
    }
}

// 获取公钥
function getPublicKey() {
    $.get("getPublicKey", function (rs) {
        if (rs && rs.code == 200) {
            window.encrypt = new JSEncrypt();
            encrypt.setPublicKey(rs.result);
        }
    });
}

// 验证
function sysValidate() {
    // 验证用户名与密码
    var theUsername = document.getElementById("username").value;
    if (theUsername.length <= 0) {
        $("#eMsg").html("提示：请输入用户名！");
        $("#username").focus();
        return false;
    }
    var thePassword = document.getElementById("password").value;
    if (thePassword.length <= 0) {
        $("#eMsg").html("提示：请输入密码！");
        $("#password").focus();
        return false;
    }
    /*if (!isValid(thePassword)) {
      $("#eMsg").html("提示：密码为8-20位包含字母、数字和特殊字符！");
      $("#password").focus();
      return false;
    }*/

    // 验证验证码
    var inputCode = document.getElementById("inputCode").value;
    if (inputCode.length <= 0) {
        $("#eMsg").html("提示：请输入验证码！");
        $("#inputCode").focus();
        return false;
    }
    var code = document.getElementById("checkCode").innerHTML;
    if (inputCode.toUpperCase() != code.toUpperCase()) {
        $("#eMsg").html("提示：验证码输入有误！");
        $("#inputCode").val("").focus();
        createCode();
        return false;
    }

    return true;
}

// login
function sysLogin() {
    if (isBusy || !sysValidate()) {
        return;
    }

    isBusy = true;
    var username = $.trim($("#username").val());
    var password = $("#password").val();
    var service = getQueryStr("service");

    var data = {
        "uid": encrypt.encrypt(username),
        "pwd": encrypt.encrypt(password)
    };
    ajax("login", "POST", JSON.stringify(data), null, null, function (rs) {
        isBusy = false;
        if (!rs || rs.code !== 200) {
            createCode();
            var msg = rs && rs.msg ? rs.msg : "登录失败！";
            $("#eMsg").html(msg);
            return;
        }
        if (rs.msg) alert(rs.msg);

        var service = getQueryStr("service");
        if (service) {
            service += (service.indexOf("?") > -1 ? "&" : "?") + "token=" + rs.result.token;
            location.href = service;
            return;
        }

        location.href = location.href.replace("/sign/toLogin", "/sign/toIndex");
    }, function () {
        isBusy = false;
        alert("登录出错，请联系管理员！");
    });
}

// Ajax
function ajax(url, type, data, dataType, contentType, fn, ex) {
    $.ajax({
        url: url,
        type: type,
        data: data,
        dataType: dataType || "json", // html、json、jsonp、script、text
        contentType: contentType || "application/json", // "application/x-www-form-urlencoded"
        success: function (data) {
            fn(data);
        },
        error: function (e) {
            console.error(e);
            ex(e);
        }
    });
}

// 获取URL参数
function getQueryStr(name) {
    var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
    var r = window.location.search.substr(1).match(reg);
    if (r != null) {
        return decodeURI(r[2]);
    }
    return null;
}

// 键盘按下事件
document.onkeydown = function (e) {
    var ev = window.event || e;
    var code = ev.keyCode || ev.which || ev.charCode;
    if (code == 13) {
        sysLogin();
    }
}

// 密码是否合规
function isValid(pwd) {
    if (!pwd) return false;

    var regex = new RegExp('^(?![a-zA-Z]+$)(?![A-Z0-9]+$)(?![A-Z\W!@#$%^&*`~()\\-_+=,.?;<>]+$)(?![a-z0-9]+$)(?![a-z\W!@#$%^&*`~()\\-_+=,.?;<>]+$)(?![0-9\W!@#$%^&*`~()\\-_+=,.?;<>]+$)[a-zA-Z0-9\W!@#$%^&*`~()\\-_+=,.?;<>]{12,20}$');
    return regex.test(pwd);
}