{{ block title }}
{{ endblock }}
{{ block content }}

<p id="question"></p>

<div>
    <button type="button" onclick="recordResponse(this)" value="A" id="optionA">
    </button>
    <button type="button" onclick="recordResponse(this)" value="B" id="optionB">
    </button>
    <button type="button" onclick="recordResponse(this)" value="C" id="optionC">
    </button>
</div>

<input type="hidden" name="raw_responses" id="raw_responses">

<script>

    let responses = {}

    let trialIndex = 0;
    let trials = js_vars.trials;

    function updateUI() {
        for (let item of ['question', 'optionA', 'optionB', 'optionC']) {
            document.getElementById(item).innerText = trials[trialIndex][item];
        }
    }

    function recordResponse(btn) {
        let trialId = trials[trialIndex].id;
        responses[trialId] = btn.value;
        trialIndex++;
        if (trialIndex === trials.length) {
            document.getElementById('raw_responses').value = JSON.stringify(responses)
            document.getElementById('form').submit();
        } else {
            updateUI();
        }
    }

    updateUI();
</script>

{{ endblock }}