@extends('siswa.layouts.app')

@section('title', 'Kerjakan Challenge')

@push('styles')
<style>
/* ─────────────────────────────────────────
   SEMBUNYIKAN SIDEBAR APP + TOGGLE
   Hanya sembunyikan elemen navigasi,
   bukan semua .sidebar agar tidak rusak
───────────────────────────────────────── */
.siswa-wrapper .sidebar,
.siswa-wrapper [class*="sidebar"]:not(.quiz-sidebar-panel),
.sidebar-toggle-btn {
    display: none !important;
}

/* Paksa main content pakai full width */
.siswa-wrapper .main,
.siswa-wrapper .main-content,
.siswa-wrapper > div:not(.sidebar):not([class*="sidebar"]) {
    margin-left: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
}

/* Paksa .content tidak punya padding aneh */
.content {
    padding: 16px 20px 40px !important;
}

/* ─────────────────────────────────────────
   LAYOUT UTAMA — 2 KOLOM
───────────────────────────────────────── */
.quiz-page {
    display: grid;
    grid-template-columns: 1fr 272px;
    gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
    align-items: start;
}

/* ─────────────────────────────────────────
   KOLOM KIRI
───────────────────────────────────────── */
.quiz-main {
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-width: 0;
}

/* Header */
.quiz-header {
    background: #fff;
    border: 1.5px solid #e2e8f0;
    border-radius: 18px;
    padding: 20px 24px;
    text-align: center;
}
.quiz-title {
    font-size: 19px;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.quiz-title img { width: 22px; height: 22px; object-fit: contain; }

.quiz-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
}
.quiz-meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: #475569;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 99px;
    padding: 4px 12px;
    font-weight: 500;
}
.quiz-meta img { width: 13px; height: 13px; object-fit: contain; }

/* Progress */
.progress-card {
    background: #fff;
    border: 1.5px solid #e2e8f0;
    border-radius: 14px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
}
.progress-label {
    font-size: 12px;
    font-weight: 600;
    color: #64748b;
    white-space: nowrap;
    flex-shrink: 0;
}
.progress-bar-wrap {
    flex: 1;
    background: #e2e8f0;
    border-radius: 99px;
    height: 7px;
    overflow: hidden;
}
.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 99px;
    transition: width 0.4s ease;
}

/* Soal card */
.soal-card {
    background: #fff;
    border: 1.5px solid #e2e8f0;
    border-radius: 18px;
    padding: 24px 26px;
    display: none;
}
.soal-card.active { display: block; }

.soal-number {
    display: inline-block;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 13px;
    border-radius: 99px;
    margin-bottom: 14px;
}
.soal-pertanyaan {
    font-size: 15px;
    font-weight: 600;
    color: #1e293b;
    line-height: 1.7;
    margin-bottom: 18px;
}

/* Opsi */
.opsi-list { display: flex; flex-direction: column; gap: 9px; }
.opsi-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #f8fafc;
    border: 1.5px solid #e2e8f0;
    border-radius: 12px;
    padding: 12px 16px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    font-size: 14px;
    color: #334155;
    user-select: none;
}
.opsi-item:hover { border-color: #667eea; background: #f0eeff; }
.opsi-item.selected {
    border-color: #667eea;
    background: #ede9fe;
    color: #4c1d95;
    font-weight: 600;
}
.opsi-item input[type="radio"] { display: none; }

.opsi-label-circle {
    width: 30px; height: 30px;
    border-radius: 50%;
    background: #e2e8f0;
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700;
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s;
}
.opsi-item.selected .opsi-label-circle { background: #667eea; color: #fff; }

/* Tombol navigasi */
.nav-buttons-card {
    background: #fff;
    border: 1.5px solid #e2e8f0;
    border-radius: 14px;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}
.btn-nav {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 22px;
    border-radius: 10px;
    border: none;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.18s;
    font-family: 'Poppins', sans-serif;
}
.btn-nav img { width: 15px; height: 15px; object-fit: contain; }
.btn-prev { background: #f1f5f9; color: #475569; }
.btn-prev:hover:not(:disabled) { background: #e2e8f0; }
.btn-prev:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-next { background: linear-gradient(135deg, #667eea, #764ba2); color: #fff; }
.btn-next:hover { opacity: 0.88; }
.btn-submit { background: linear-gradient(135deg, #22c55e, #16a34a); color: #fff; display: none; }
.btn-submit:hover { opacity: 0.88; }

/* Warning */
.warning-box {
    display: none;
    align-items: center;
    gap: 8px;
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-radius: 11px;
    padding: 11px 15px;
    font-size: 13px;
    color: #c2410c;
    font-weight: 500;
    margin-bottom: 4px;
}
.warning-box img { width: 15px; height: 15px; object-fit: contain; flex-shrink: 0; }

/* ─────────────────────────────────────────
   KOLOM KANAN — SIDEBAR QUIZ
───────────────────────────────────────── */
.quiz-sidebar-panel {
    display: flex;
    flex-direction: column;
    gap: 14px;
    position: sticky;
    top: 20px;
}

/* Timer */
.timer-card {
    background: #fff;
    border: 1.5px solid #e2e8f0;
    border-radius: 18px;
    padding: 18px 20px;
    text-align: center;
}
.timer-label {
    font-size: 10px;
    font-weight: 700;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}
.timer-label img { width: 13px; height: 13px; object-fit: contain; }
.timer-display {
    font-size: 34px;
    font-weight: 800;
    color: #1e293b;
    letter-spacing: 3px;
    font-variant-numeric: tabular-nums;
    transition: color 0.3s;
}
.timer-display.warning { color: #d97706; }
.timer-display.danger  { color: #dc2626; animation: heartbeat 0.8s ease-in-out infinite; }
@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50%       { transform: scale(1.06); }
}
.timer-bar-wrap {
    background: #e2e8f0;
    border-radius: 99px;
    height: 5px;
    margin-top: 10px;
    overflow: hidden;
}
.timer-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #22c55e, #667eea);
    border-radius: 99px;
    transition: width 1s linear, background 0.3s;
}
.timer-bar-fill.warning { background: linear-gradient(90deg, #f59e0b, #d97706); }
.timer-bar-fill.danger  { background: linear-gradient(90deg, #ef4444, #dc2626); }

/* Nav card */
.nav-card {
    background: #fff;
    border: 1.5px solid #e2e8f0;
    border-radius: 18px;
    padding: 18px 20px;
}
.nav-card-label {
    font-size: 10px;
    font-weight: 700;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-card-label img { width: 13px; height: 13px; object-fit: contain; }

.nav-summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 14px;
}
.summary-item {
    text-align: center;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 8px 4px;
}
.summary-num   { font-size: 22px; font-weight: 800; }
.summary-label { font-size: 10px; color: #94a3b8; font-weight: 500; margin-top: 2px; }
.summary-item.answered-sum   .summary-num { color: #22c55e; }
.summary-item.unanswered-sum .summary-num { color: #94a3b8; }

.nav-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 7px;
    margin-bottom: 14px;
}
.nav-btn {
    aspect-ratio: 1;
    border-radius: 9px;
    border: 1.5px solid #e2e8f0;
    background: #f8fafc;
    font-size: 12px;
    font-weight: 700;
    color: #64748b;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    font-family: 'Poppins', sans-serif;
}
.nav-btn:hover                { border-color: #667eea; background: #f0eeff; color: #667eea; }
.nav-btn.active               { background: #667eea; border-color: #667eea; color: #fff; }
.nav-btn.answered             { background: #dcfce7; border-color: #22c55e; color: #16a34a; }
.nav-btn.active.answered      { background: #22c55e; border-color: #22c55e; color: #fff; }

.nav-legend {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding-top: 12px;
    border-top: 1px solid #f1f5f9;
}
.legend-item {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 11px;
    color: #64748b;
}
.legend-dot {
    width: 13px; height: 13px;
    border-radius: 4px;
    flex-shrink: 0;
}
.legend-dot.current { background: #667eea; }
.legend-dot.done    { background: #dcfce7; border: 1.5px solid #22c55e; }
.legend-dot.undone  { background: #f8fafc; border: 1.5px solid #e2e8f0; }

/* ─────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────── */
@media (max-width: 768px) {
    .quiz-page { grid-template-columns: 1fr; }
    .quiz-sidebar-panel { position: static; order: -1; }
    .nav-grid { grid-template-columns: repeat(8, 1fr); }
}
</style>
@endpush

@section('content')

<div class="quiz-page">

    {{-- ══════════════════════════════
         KOLOM KIRI — Soal
    ══════════════════════════════ --}}
    <div class="quiz-main">

        <div class="quiz-header">
            <div class="quiz-title">
                <img src="{{ asset('images/icon/siswac/piala.png') }}" alt="Ikon piala">
                {{ $challenge->judul_challenge }}
            </div>
            <div class="quiz-meta">
                <span>
                    <img src="{{ asset('images/icon/siswac/buku1.png') }}" alt="Jumlah soal">
                    {{ $challenge->soal->count() }} Soal
                </span>
                <span>
                    <img src="{{ asset('images/icon/siswac/star.png') }}" alt="EXP">
                    {{ $challenge->exp }} EXP
                </span>
                <span>
                    <img src="{{ asset('images/icon/siswac/alarm.png') }}" alt="Tenggat waktu">
                    Tenggat: {{ \Carbon\Carbon::parse($challenge->tenggat_waktu)->format('d M Y, H:i') }}
                </span>
            </div>
        </div>

        <div class="progress-card">
            <span class="progress-label" id="progressLabel">
                Soal 1 dari {{ $challenge->soal->count() }}
            </span>
            <div class="progress-bar-wrap">
                <div class="progress-bar-fill" id="progressBar"
                     style="width: {{ round(1 / $challenge->soal->count() * 100) }}%">
                </div>
            </div>
        </div>

        <form action="{{ route('siswa.challenge.submit', $challenge->id_challenge) }}"
              method="POST" id="quizForm">
            @csrf

            @foreach($challenge->soal as $i => $soal)
            <div class="soal-card {{ $i === 0 ? 'active' : '' }}" id="soal-{{ $i }}">
                <span class="soal-number">Soal {{ $i + 1 }}</span>
                <p class="soal-pertanyaan">{{ $soal->pertanyaan }}</p>
                <div class="opsi-list">
                    @foreach(['A','B','C','D'] as $opsi)
                    @php $key = 'opsi_' . strtolower($opsi); @endphp
                    <label class="opsi-item" id="label-{{ $i }}-{{ $opsi }}"
                           onclick="pilihJawaban({{ $i }}, '{{ $opsi }}', {{ $soal->id_soal }})">
                        <input type="radio" name="jawaban[{{ $soal->id_soal }}]"
                               value="{{ $opsi }}" id="radio-{{ $i }}-{{ $opsi }}">
                        <span class="opsi-label-circle">{{ $opsi }}</span>
                        <span>{{ $soal->$key }}</span>
                    </label>
                    @endforeach
                </div>
            </div>
            @endforeach

            <div class="warning-box" id="warningBox">
                <img src="{{ asset('images/icon/siswac/alert.png') }}" alt="Peringatan">
                Masih ada <span id="warningCount"></span> soal yang belum dijawab. Yakin ingin submit?
            </div>

            <div class="nav-buttons-card">
                <button type="button" class="btn-nav btn-prev" id="btnPrev"
                        onclick="prevSoal()" disabled>← Sebelumnya</button>
                <button type="button" class="btn-nav btn-next" id="btnNext"
                        onclick="nextSoal()">Selanjutnya →</button>
                <button type="submit" class="btn-nav btn-submit" id="btnSubmit"
                        onclick="return konfirmasiSubmit()">
                    <img src="{{ asset('images/icon/siswac/target.png') }}" alt="Submit">
                    Selesai &amp; Submit
                </button>
            </div>
        </form>

    </div>{{-- /quiz-main --}}


    {{-- ══════════════════════════════
         KOLOM KANAN — Sidebar Quiz
    ══════════════════════════════ --}}
    <div class="quiz-sidebar-panel">

        <div class="timer-card">
            <div class="timer-label">
                <img src="{{ asset('images/icon/siswac/alarm.png') }}" alt="Timer">
                Sisa Waktu
            </div>
            <div class="timer-display" id="timerDisplay">--:--</div>
            <div class="timer-bar-wrap">
                <div class="timer-bar-fill" id="timerBar" style="width:100%"></div>
            </div>
        </div>

        <div class="nav-card">
            <div class="nav-card-label">
                <img src="{{ asset('images/icon/siswac/buku1.png') }}" alt="Navigasi soal">
                Navigasi Soal
            </div>

            <div class="nav-summary">
                <div class="summary-item answered-sum">
                    <div class="summary-num" id="summaryAnswered">0</div>
                    <div class="summary-label">Terjawab</div>
                </div>
                <div class="summary-item unanswered-sum">
                    <div class="summary-num" id="summaryUnanswered">{{ $challenge->soal->count() }}</div>
                    <div class="summary-label">Belum</div>
                </div>
            </div>

            <div class="nav-grid" id="navGrid">
                @foreach($challenge->soal as $i => $soal)
                <button type="button"
                        class="nav-btn {{ $i === 0 ? 'active' : '' }}"
                        id="navBtn-{{ $i }}"
                        onclick="goToSoal({{ $i }})">
                    {{ $i + 1 }}
                </button>
                @endforeach
            </div>

            <div class="nav-legend">
                <div class="legend-item">
                    <div class="legend-dot current"></div>
                    <span>Soal aktif</span>
                </div>
                <div class="legend-item">
                    <div class="legend-dot done"></div>
                    <span>Sudah dijawab</span>
                </div>
                <div class="legend-item">
                    <div class="legend-dot undone"></div>
                    <span>Belum dijawab</span>
                </div>
            </div>
        </div>

    </div>{{-- /quiz-sidebar-panel --}}

</div>{{-- /quiz-page --}}

@endsection

@push('scripts')
<script>
const totalSoal = {{ $challenge->soal->count() }};
let currentSoal = 0;
let jawaban     = {};

// ══════════════════════════════════════════════════════════
// FIX TIMER — pakai timestamp detik dari server, kalikan
// 1000 di JS. Ini cara paling reliable lintas timezone.
// Carbon::parse()->timestamp = Unix timestamp dalam DETIK
// ══════════════════════════════════════════════════════════
const tenggatMs  = {{ \Carbon\Carbon::parse($challenge->tenggat_waktu)->timestamp }} * 1000;
const totalDetik = Math.max(0, Math.floor((tenggatMs - Date.now()) / 1000));
let sisaDetik    = totalDetik;

const elTimer    = document.getElementById('timerDisplay');
const elTimerBar = document.getElementById('timerBar');

function formatWaktu(s) {
    if (s <= 0) return '00:00';
    const j = Math.floor(s / 3600);
    const m = Math.floor((s % 3600) / 60);
    const d = s % 60;
    const mm = String(m).padStart(2, '0');
    const ss = String(d).padStart(2, '0');
    if (j > 0) return `${String(j).padStart(2,'0')}:${mm}:${ss}`;
    return `${mm}:${ss}`;
}

function updateTimer() {
    elTimer.textContent = formatWaktu(sisaDetik);

    // Progress bar timer
    const pct = totalDetik > 0 ? (sisaDetik / totalDetik) * 100 : 0;
    elTimerBar.style.width = pct + '%';

    // State warna
    if (sisaDetik <= 60) {
        elTimer.className    = 'timer-display danger';
        elTimerBar.className = 'timer-bar-fill danger';
    } else if (sisaDetik <= 300) {
        elTimer.className    = 'timer-display warning';
        elTimerBar.className = 'timer-bar-fill warning';
    } else {
        elTimer.className    = 'timer-display';
        elTimerBar.className = 'timer-bar-fill';
    }

    if (sisaDetik <= 0) {
        clearInterval(timerInterval);
        elTimer.textContent = '00:00';
        alert('Waktu habis! Jawaban kamu akan otomatis dikumpulkan.');
        document.getElementById('quizForm').submit();
        return;
    }
    sisaDetik--;
}

updateTimer();
const timerInterval = setInterval(updateTimer, 1000);


// ══════════════════════════════════════════
// NAVIGASI SOAL
// ══════════════════════════════════════════
function goToSoal(index) {
    document.getElementById(`soal-${currentSoal}`).classList.remove('active');
    document.getElementById(`navBtn-${currentSoal}`).classList.remove('active');

    currentSoal = index;

    document.getElementById(`soal-${currentSoal}`).classList.add('active');
    document.getElementById(`navBtn-${currentSoal}`).classList.add('active');

    updateNav();
    updateProgress();
}

function nextSoal() { if (currentSoal < totalSoal - 1) goToSoal(currentSoal + 1); }
function prevSoal() { if (currentSoal > 0)             goToSoal(currentSoal - 1); }

function pilihJawaban(soalIndex, opsi, idSoal) {
    jawaban[soalIndex] = opsi;

    ['A','B','C','D'].forEach(o => {
        document.getElementById(`label-${soalIndex}-${o}`)?.classList.remove('selected');
    });
    document.getElementById(`label-${soalIndex}-${opsi}`)?.classList.add('selected');
    document.getElementById(`radio-${soalIndex}-${opsi}`).checked = true;
    document.getElementById(`navBtn-${soalIndex}`)?.classList.add('answered');

    updateProgress();
    updateSummary();
}

function updateNav() {
    const btnPrev   = document.getElementById('btnPrev');
    const btnNext   = document.getElementById('btnNext');
    const btnSubmit = document.getElementById('btnSubmit');

    btnPrev.disabled = (currentSoal === 0);

    if (currentSoal === totalSoal - 1) {
        btnNext.style.display   = 'none';
        btnSubmit.style.display = 'inline-flex';
    } else {
        btnNext.style.display   = 'inline-flex';
        btnSubmit.style.display = 'none';
    }
}

function updateProgress() {
    const answered = Object.keys(jawaban).length;
    const pct      = Math.round(((currentSoal + 1) / totalSoal) * 100);
    document.getElementById('progressBar').style.width  = pct + '%';
    document.getElementById('progressLabel').textContent =
        `Soal ${currentSoal + 1} dari ${totalSoal} · ${answered} terjawab`;
}

function updateSummary() {
    const answered = Object.keys(jawaban).length;
    document.getElementById('summaryAnswered').textContent   = answered;
    document.getElementById('summaryUnanswered').textContent = totalSoal - answered;
}

function konfirmasiSubmit() {
    const belum = totalSoal - Object.keys(jawaban).length;
    if (belum > 0) {
        document.getElementById('warningCount').textContent = `${belum} soal`;
        document.getElementById('warningBox').style.display = 'flex';
        return confirm(`Masih ada ${belum} soal yang belum dijawab. Yakin ingin submit?`);
    }
    return confirm('Yakin ingin submit jawaban? Jawaban tidak bisa diubah setelah submit.');
}

// Init
updateNav();
updateProgress();
updateSummary();
</script>
@endpush