var jAuth = {}, // global variable used in Mobile ID & Smart ID authentication
    idCardInitialized = false,
    idCard = {
        certificate: null,
        certificateInfo: null,
        dbts: null,
        token: null,
        dtbsHash: null,
        signatureValue: null
    },
    sessionToken = null,
    controlCode = null,
    checkLoginStatusPollsDone = 0, // Expire after 120 seconds if Mobile ID code not verified
    selectedMethod = null; // the authentication method that was last clicked

var checkAuthStatus = function(url) {
    $.getJSON(url,
        {
            sessionToken: sessionToken
        },
        function(data, textStatus, jqXHR) {
            if (data.Status === "ok") {
                $('#jAuthStatus p').text('Laen...');

                window.top.location.href = data.RedirectUrl;
            }
            else if (data.Status === "waiting") {
                console.debug(`Authentication still underway (${data.Message})`);

                if (checkLoginStatusPollsDone > 48) {
                    alert('Sessioon aegus');

                    checkLoginStatusPollsDone = 0;

                    hideAuthStatus();

                    return;
                }

                checkLoginStatusPollsDone++;

                setTimeout(function() {
                        checkAuthStatus(url);
                    },
                    2500);
            }
            else if (data.Status === 'canceled') {
                alert('Isikutuvastamine katkestatud');
                hideAuthStatus();
            }
            else {
                const errorMsg = ExtractAuthenticationErrors(data);
                alert(`Isikutuvastamine ebaõnnestus\n${errorMsg}`);

                hideAuthStatus();
            }

        }).error(function(jqXHR, textStatus, errorThrown) {
            alert(`Isikutuvastamine ebaõnnestus: ${errorThrown}`);
            hideAuthStatus();
        }
    );
};

function showAuthStatus() {
    $('#jAuthStatus').show();
    $('#jAuthWrapper').hide();
    $('#jAuthButtonsWrapper').hide();
    $('#jAuthPhoneNoWrapper').hide();
    $('#jAuthNationalIdWrapper').hide();
}

function hideAuthStatus() {
    $('#jAuthStatus').hide();
    $('#jAuthWrapper').show();
    $('#jAuthButtonsWrapper').show();

    if (selectedMethod == 'mobileId')
        showMobileIdFields();
    else if (selectedMethod == 'smartId')
        showSmartIdFields();
}

function showMobileIdFields() {
    $('#jAuthWrapper').show();
    $('#jAuthPhoneNoWrapper').show();
    $('#jAuthNationalIdWrapper').show();
}

function showSmartIdFields() {
    $('#jAuthWrapper').show();
    $('#jAuthPhoneNoWrapper').hide();
    $('#jAuthNationalIdWrapper').show();
}

function initIdCardAuth() {
    console.debug('Initializing initIdCardAuth..');

    try {
        if (iSignApplet.isInitialized) {
            iSignApplet.requestLogin('ee');
        }
        else {
            iSignApplet.translations.et.title = 'Isikutuvastus';

            iSignApplet.init({
                language: 'et',
                certificatePurpose: 'login',
                supportedResidencies: ['ee'],
                authenticationUrls: {
                    'ee': 'https://auth.dokobit.com'
                }
            });
        }
        idCardInitialized = true;
    }
    catch (ex) {
        console.error('Error initializing ID card applet', ex);
        hideAuthStatus();
    }
}

/**
* This method will be automatically called by our library when user selects his certifcate.
*/
function authenticationTokenReceived(token) {
    if (token != null) {
        $.post(
            jAuth.idCardAuthUrl,
            { token, redirectUrl: jAuth.redirectUrl },
            function(data) {
                if (data.Status === "ok") {
                    $('#jAuthStatus p').text('Laen...');

                    window.top.location.href = data.RedirectUrl;
                }
                else if (data.Status === 'canceled') {
                    alert('Isikutuvastamine katkestatud');
                    hideAuthStatus();
                }
                else {
                    const errorMsg = ExtractAuthenticationErrors(data);
                    alert(`Isikutuvastamine ebaõnnestus\n${errorMsg}`);

                    hideAuthStatus();
                }
            }
        ).error(function(jqXHR, textStatus, errorThrown) {
            alert(`Isikutuvastamine ebaõnnestus: ${errorThrown}`);
            hideAuthStatus();
        });
    }
    else
        hideAuthStatus();
}

function onCertificateNotFound() {
    hideAuthStatus();
}

function onUserCancel() {
    hideAuthStatus();
}

function mobileIdClick() {
    selectedMethod = 'mobileId';
    $('#isign-applet').hide();
    $('#jAuthWrapper').show();
    $('#jAuthPhoneNoWrapper').show();
    $('#jAuthNationalIdWrapper').show();

    var jAuthPhoneNo = $.trim($('#jAuthPhoneNo').val());
    const jAuthNationalId = $.trim($('#jAuthNationalId').val());
    var errors = false;

    if (jAuthPhoneNo == '') {
        $('#jAuthPhoneNoError').show();
        errors = true;
    }
    else
        $('#jAuthPhoneNoError').hide();


    if (jAuthNationalId == '') {
        $('#jAuthNationalIdError').show();
        errors = true;
    }
    else
        $('#jAuthNationalIdError').hide();

    if (errors) {
        if (jAuthPhoneNo == '')
            $('#jAuthPhoneNo').focus();
        else
            $('#jAuthNationalId').focus();
    }
    else {
        $('#jAuthPhoneNoWrapper').hide();
        $('#jAuthNationalIdWrapper').hide();

        $('#jAuthStatus p').text('');
        showAuthStatus();

        sessionToken = null;
        controlCode = null;

        $.post(jAuth.mobileIdStartUrl,
            {
                phoneNo: jAuthPhoneNo,
                nationalId: jAuthNationalId
            },
            function(data, textStatus, jqXHR) {
                if (data.Status === 'nationalIdRequired') {
                    hideAuthStatus();
                    $('#jAuthWrapper').show();
                    $('#jAuthPhoneNoWrapper').show();
                    $('#jAuthNationalIdWrapper').show();
                    $('#jAuthNationalId').focus();
                    return;
                }
                if (data.Status === 'canceled') {
                    alert('Isikutuvastamine katkestatud');
                    hideAuthStatus();
                    $('#jAuthWrapper').show();
                    $('#jAuthPhoneNoWrapper').show();
                    $('#jAuthNationalIdWrapper').show();
                    return;
                }
                if (data.Status !== "ok") {
                    const errorMsg = ExtractAuthenticationErrors(data);
                    alert(`Isikutuvastamine ebaõnnestus\n${errorMsg}`);

                    hideAuthStatus();
                    $('#jAuthWrapper').show();
                    $('#jAuthPhoneNoWrapper').show();
                    $('#jAuthNationalIdWrapper').show();
                    return;
                }

                sessionToken = data.Token;
                controlCode = data.ControlCode;

                $('#jAuthStatus p').text(`Palun kontrollige, et Mobiil-ID teie telefonis kuvab sama turvakoodi, mis siin: ${controlCode}`);

                checkLoginStatusPollsDone = 0;

                var url = jAuth.mobileIdStatusUrl + '?phoneNo=' + encodeURIComponent(jAuthPhoneNo) + '&redirectUrl=' + encodeURIComponent(jAuth.redirectUrl || '');

                setTimeout(function() {
                        checkAuthStatus(url);
                    },
                    2500);
            }).error(function(jqXHR, textStatus, errorThrown) {
                alert(`Isikutuvastamine ebaõnnestus: ${errorThrown}`);

                hideAuthStatus();
            }
        );
    }

    return false;
}

function smartIdClick() {
    selectedMethod = 'smartId';
    $('#isign-applet').hide();
    $('#jAuthWrapper').show();
    $('#jAuthNationalIdWrapper').show();
    $('#jAuthNationalId').focus();

    $('#jAuthPhoneNoWrapper').hide();

    const jAuthNationalId = $.trim($('#jAuthNationalId').val());
    var errors = false;

    if (jAuthNationalId == '') {
        $('#jAuthNationalIdError').show();
        errors = true;
    }
    else
        $('#jAuthNationalIdError').hide();

    if (!errors) {
        $('#jAuthNationalIdWrapper').hide();
        $('#jAuthStatus p').text('');
        showAuthStatus();

        sessionToken = null;
        controlCode = null;

        $.post(jAuth.smartIdStartUrl,
            {
                nationalId: jAuthNationalId
            },
            function(data, textStatus, jqXHR) {
                if (data.Status === 'canceled') {
                    alert('Isikutuvastamine katkestatud');
                    hideAuthStatus();
                    return;
                }
                if (data.Status !== "ok") {
                    const errorMsg = ExtractAuthenticationErrors(data);
                    alert(`Isikutuvastamine ebaõnnestus\n${errorMsg}`);

                    hideAuthStatus();
                    return;
                }

                sessionToken = data.Token;
                controlCode = data.ControlCode;

                $('#jAuthStatus p').text(`Palun kontrollige, et Smart ID teie telefonis kuvab sama turvakoodi, mis siin: ${controlCode}`);

                checkLoginStatusPollsDone = 0;

                var url = jAuth.smartIdStatusUrl + '?redirectUrl=' + encodeURIComponent(jAuth.redirectUrl || '');

                setTimeout(function() {
                        checkAuthStatus(url);
                    },
                    2500);
            }).error(function(jqXHR, textStatus, errorThrown) {
                alert(`Isikutuvastamine ebaõnnestus: ${errorThrown}`);

                hideAuthStatus();
            }
        );
    }

    return false;
}

function authKeyPress(e) {
    if (e.which === 13) {
        if (selectedMethod === 'mobileId')
            $('#jAuthMobileIdBtn').click();
        else if (selectedMethod === 'smartId')
            $('#jAuthSmartIdBtn').click();
        return false;
    }
}

function idCardClick() {
    selectedMethod = 'idcard';

    idCard.certificate = null;
    idCard.certificateInfo = null;
    idCard.algorithm = null;
    idCard.dbts = null;
    idCard.dtbsHash = null;
    idCard.signatureValue = null;

    $('#isign-applet').show();
    showAuthStatus();

    if (!idCardInitialized)
        initIdCardAuth();
    else
        iSignApplet.requestLogin('ee');

    return false;
}

/**
 * Extracts errors from Mobile ID or Smart ID authentication response and returns them as formatted string
 *
 * @param data - response returned from authentication service
 */
function ExtractAuthenticationErrors(data) {
    var errorMsg = '';

    if (data.Errors != null && data.Errors.length != 0) {
        for (var i = 0; i < data.Errors.length; i++) {
            if (data.Errors[i].Field == '[phone]')
                errorMsg += "Palun sisestage korrektsel kujul telefoninumber\n";
            else if (data.Errors[i].Field == '[code]')
                errorMsg += "Vabandage, kuid sisestatud isikukood on vigane\n";
            else
                errorMsg += data.Errors[0].Field + " " + data.Errors[0].Message + "\n";
        }
    }
    else
        errorMsg = data.Message;

    return errorMsg;
}

$(function() {
    $('#jAuthIdCardBtn').click(idCardClick);

    $('#jAuthMobileIdBtn').click(mobileIdClick);

    $('#jAuthSmartIdBtn').click(smartIdClick);

    $('#jAuthPhoneNo, #jAuthNationalId').keypress(authKeyPress);
});