{% extends "base_login_page.html" %}
{% block content %}

<style>
#otp input {
  padding-left: 0px;
  padding-right: 0px;
}

</style>

<div>
    <p>Please go to your authenticator app <i>{{ factor.name }}</i>, generate a new code and enter it here:</p>
    <form id="totp_form" method="post" action="{{ factor.login_url(_p.redirect_uri) }}">
        <input type="hidden" id="code" name="code"/>
        <div class="form-group">
            <div id="otp" class="inputs d-flex flex-row justify-content-center mt-2">
                <input class="m-2 text-center form-control rounded" type="text" id="i1" maxlength="1" autofocus/>
                <input class="m-2 text-center form-control rounded" type="text" id="i2" maxlength="1"/>
                <input class="m-2 text-center form-control rounded" type="text" id="i3" maxlength="1"/>
                <input class="m-2 text-center form-control rounded" type="text" id="i4" maxlength="1"/>
                <input class="m-2 text-center form-control rounded" type="text" id="i5" maxlength="1"/>
                <input class="m-2 text-center form-control rounded" type="text" id="i6" maxlength="1"/>
            </div>
        </div>
    </form>
</div>


<div style="margin-top: 10px;">
    <a href="/2fa_auth?force_display=true&redirect={{ _p.redirect_uri.get_encoded() }}">Sign in using another factor</a><br/>
    <a href="/logout">Sign out</a>
</div>

<script>
function OTPInput() {
    const inputs = document.querySelectorAll('#otp > *[id]');
    for (let i = 0; i < inputs.length; i++) {
        // Reset form on init
        inputs[i].value = "";
    }

    let currIndex = 0;

    document.addEventListener('keydown', (event) => {
        if (event.key === "Backspace") {
            if (inputs[currIndex].value != "") {
                inputs[currIndex].value = '';
            } else if (currIndex > 0) {
                inputs[currIndex - 1].value = "";
                inputs[currIndex - 1].focus();
                currIndex--;
            }
        }

        // Code has already been typed entirely
        else if (currIndex === inputs.length - 1 && inputs[currIndex].value !== '')
        {
            return;
        }

        // Add new digit
        else if ((event.keyCode >= 48 && event.keyCode <= 57)
            || (event.keyCode >= 96 && event.keyCode <= 105)){
            inputs[currIndex].value = event.key;
            if (currIndex < inputs.length - 1) {
                inputs[currIndex + 1].focus();
                currIndex++;
            }
            else
                submitCode();
        }

        event.preventDefault();
    });
}

function submitCode() {
    const code = [...document.querySelectorAll('#otp > *[id]')]
        .map((i) => i.value)
        .join("");

    document.getElementById("code").value = code;
    document.getElementById("totp_form").submit();
}

document.addEventListener("DOMContentLoaded", () => OTPInput());
</script>

{% endblock content %}