{{ block title }}
{{ endblock }}

{{ block content }}

<style>
    .otree-timer {
        display: none !important;
    }

    .task-wrapper {
        font-family: serif;
        font-size: 20px;
        line-height: 1.5;
        max-width: 1100px;
    }

    .task-title {
        font-weight: bold;
        margin-bottom: 22px;
    }

    .task-subtitle {
        margin-bottom: 20px;
    }

    .task-subtitle strong {
        font-weight: bold;
    }

    .outer-box {
        background: #f2f2f2;
        padding: 28px;
        margin-top: 18px;
        width: 100%;
        max-width: 1000px;
    }

    .inner-box {
        background: white;
        border: 1px solid #999;
        min-height: 520px;
        position: relative;
        padding: 40px 30px 80px 30px;
    }

    .timer-box {
        position: absolute;
        top: 18px;
        right: 20px;
        font-size: 22px;
        font-weight: bold;
    }

    .problem-area {
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 360px;
    }

    .problem-grid {
        display: grid;
        grid-template-columns: 30px 140px;
        row-gap: 10px;
        column-gap: 12px;
        align-items: center;
        font-size: 30px;
    }

    .symbol {
        text-align: center;
        font-weight: bold;
    }

    .number {
        text-align: right;
        letter-spacing: 1px;
    }

    .sum-line {
        border-top: 2px solid #555;
        width: 140px;
        margin-top: 12px;
        padding-top: 14px;
    }

    .answer-input {
        width: 140px;
        height: 46px;
        font-size: 28px;
        text-align: center;
        border: 2px solid #7d8cff;
        background: #dfe4ff;
        outline: none;
    }

    .submit-row {
        position: absolute;
        right: 22px;
        bottom: 20px;
    }

    .submit-btn {
        background: #ff5a5a;
        border: 1px solid #555;
        color: black;
        font-weight: bold;
        padding: 10px 24px;
        cursor: pointer;
        font-family: serif;
        font-size: 18px;
    }

    .otree-btn-next {
        display: none !important;
    }
</style>

<div class="task-wrapper">
    <div class="task-title">
        Tugas Putaran 1
    </div>

    <div class="task-subtitle">
        <strong>Bayaran per Jawaban Benar</strong><br>
        Ketik jawaban Anda pada kotak biru besar, lalu konfirmasikan dengan menekan <strong>Submit</strong>.
    </div>

    <div class="outer-box">
        <div class="inner-box">
            <div class="timer-box">
                Sisa waktu: <span id="time_left"></span>
            </div>

            <div class="problem-area">
                <div>
                    <div class="problem-grid">
                        <div class="symbol"></div>
                        <div class="number" id="num1"></div>

                        <div class="symbol">+</div>
                        <div class="number" id="num2"></div>

                        <div class="symbol">+</div>
                        <div class="number" id="num3"></div>

                        <div class="symbol">+</div>
                        <div class="number" id="num4"></div>

                        <div class="symbol">+</div>
                        <div class="number" id="num5"></div>

                        <div class="symbol"></div>
                        <div class="sum-line"></div>

                        <div class="symbol">=</div>
                        <div>
                            <input type="number" id="answer_input" class="answer-input" autocomplete="off">
                        </div>
                    </div>
                </div>
            </div>

            <div class="submit-row">
                <button type="button" class="submit-btn" id="submit_answer_btn">Submit</button>
            </div>
        </div>
    </div>
</div>

<input type="hidden" name="hidden_num_correct" id="hidden_num_correct">
<input type="hidden" name="hidden_num_attempted" id="hidden_num_attempted">
<input type="hidden" name="hidden_time_spent_seconds" id="hidden_time_spent_seconds">
<textarea name="hidden_problem_log" id="hidden_problem_log" style="display:none;"></textarea>
<textarea name="hidden_answer_log" id="hidden_answer_log" style="display:none;"></textarea>
<textarea name="hidden_result_log" id="hidden_result_log" style="display:none;"></textarea>

<script>
    const problems = JSON.parse({{ problems_json|json }});
    const totalTime = {{ task_time_seconds }};

    let currentIndex = 0;
    let numCorrect = 0;
    let numAttempted = 0;
    let startTime = Date.now();
    let timerInterval = null;

    let problemLog = [];
    let answerLog = [];
    let resultLog = [];

    const num1 = document.getElementById("num1");
    const num2 = document.getElementById("num2");
    const num3 = document.getElementById("num3");
    const num4 = document.getElementById("num4");
    const num5 = document.getElementById("num5");
    const answerInput = document.getElementById("answer_input");
    const timeLeft = document.getElementById("time_left");
    const submitBtn = document.getElementById("submit_answer_btn");

    function formatTime(seconds) {
        const m = Math.floor(seconds / 60);
        const s = seconds % 60;
        return `${m}:${String(s).padStart(2, '0')}`;
    }

    function loadProblem() {
        const p = problems[currentIndex];
        num1.textContent = p.numbers[0];
        num2.textContent = p.numbers[1];
        num3.textContent = p.numbers[2];
        num4.textContent = p.numbers[3];
        num5.textContent = p.numbers[4];
        answerInput.value = "";
        answerInput.focus();
    }

    function saveHiddenFields() {
        const elapsed = (Date.now() - startTime) / 1000.0;

        document.getElementById("hidden_num_correct").value = numCorrect;
        document.getElementById("hidden_num_attempted").value = numAttempted;
        document.getElementById("hidden_time_spent_seconds").value = elapsed.toFixed(2);
        document.getElementById("hidden_problem_log").value = JSON.stringify(problemLog);
        document.getElementById("hidden_answer_log").value = JSON.stringify(answerLog);
        document.getElementById("hidden_result_log").value = JSON.stringify(resultLog);
    }

    function submitCurrentAnswer() {
        const p = problems[currentIndex];
        const rawAnswer = answerInput.value.trim();

        if (rawAnswer === "") {
            return;
        }

        const submittedAnswer = parseInt(rawAnswer, 10);
        const isCorrect = submittedAnswer === p.solution;

        numAttempted += 1;
        if (isCorrect) {
            numCorrect += 1;
        }

        problemLog.push(p.numbers);
        answerLog.push(submittedAnswer);
        resultLog.push({
            correct: isCorrect ? 1 : 0,
            solution: p.solution,
            timestamp_seconds: ((Date.now() - startTime) / 1000.0).toFixed(2)
        });

        currentIndex += 1;
        saveHiddenFields();

        if (currentIndex < problems.length) {
            loadProblem();
        } else {
            document.querySelector("form").submit();
        }
    }

    function updateTimer() {
        const elapsed = Math.floor((Date.now() - startTime) / 1000);
        const remaining = Math.max(totalTime - elapsed, 0);
        timeLeft.textContent = formatTime(remaining);
        saveHiddenFields();

        if (remaining <= 0) {
            clearInterval(timerInterval);
            document.querySelector("form").submit();
        }
    }

    submitBtn.addEventListener("click", function () {
        submitCurrentAnswer();
    });

    answerInput.addEventListener("keydown", function (e) {
        if (e.key === "Enter") {
            e.preventDefault();
            submitCurrentAnswer();
        }
    });

    document.addEventListener("DOMContentLoaded", function () {
        loadProblem();
        updateTimer();
        timerInterval = setInterval(updateTimer, 250);
    });
</script>

{{ endblock }}