@extends('siswa.layouts.app')

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

@push('styles')
<style>
/* Sembunyikan sidebar saat kerjakan biar fokus */
.siswa-wrapper .sidebar { display: none !important; }
.sidebar-toggle-btn     { display: none !important; }

.quiz-wrapper {
    max-width: 680px;
    margin: 0 auto;
    padding: 10px 0 40px;
}

.quiz-header {
    text-align: center;
    margin-bottom: 28px;
}

.quiz-title {
    font-size: 20px;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 6px;
}

.quiz-meta {
    font-size: 13px;
    color: #64748b;
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.quiz-meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* Progress bar */
.progress-bar-wrap {
    background: #e2e8f0;
    border-radius: 99px;
    height: 8px;
    margin-bottom: 28px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 99px;
    transition: width 0.4s ease;
}

.progress-label {
    text-align: center;
    font-size: 12px;
    color: #64748b;
    font-weight: 600;
    margin-bottom: 8px;
}

/* Soal card */
.soal-card {
    background: white;
    border-radius: 20px;
    border: 2px solid #e5e5e5;
    padding: 28px;
    margin-bottom: 20px;
    display: none; /* sembunyikan semua dulu */
}

.soal-card.active { display: block; }

.soal-number {
    display: inline-block;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    font-size: 12px;
    font-weight: 700;
    padding: 3px 12px;
    border-radius: 99px;
    margin-bottom: 14px;
}

.soal-pertanyaan {
    font-size: 16px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 20px;
    line-height: 1.7;
}

/* Opsi pilihan */
.opsi-list { display: flex; flex-direction: column; gap: 10px; }

.opsi-item {
    display: flex;
    align-items: center;
    gap: 14px;
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 13px 16px;
    cursor: pointer;
    transition: all 0.18s;
    font-size: 14px;
    color: #1e293b;
    user-select: none;
}

.opsi-item:hover {
    border-color: #667eea;
    background: #f0eeff;
}

.opsi-item.selected {
    border-color: #667eea;
    background: linear-gradient(135deg, #ede9fe, #f5f3ff);
    font-weight: 600;
    color: #4c1d95;
}

.opsi-item input[type="radio"] { display: none; }

.opsi-label-circle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    flex-shrink: 0;
    transition: all 0.18s;
}

.opsi-item.selected .opsi-label-circle {
    background: #667eea;
    color: white;
}

/* Navigasi */
.nav-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.btn-nav {
    padding: 11px 24px;
    border-radius: 12px;
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Poppins', sans-serif;
}

.btn-prev {
    background: #f1f5f9;
    color: #475569;
}
.btn-prev:hover { background: #e2e8f0; }
.btn-prev:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-next {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    margin-left: auto;
}
.btn-next:hover { opacity: 0.9; }

.btn-submit {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
    margin-left: auto;
    display: none;
}
.btn-submit:hover { opacity: 0.9; }

/* Nomor soal dots */
.soal-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.soal-dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: #64748b;
    cursor: pointer;
    transition: all 0.2s;
}

.soal-dot.active   { background: #667eea; color: white; }
.soal-dot.answered { background: #dcfce7; color: #16a34a; border: 2px solid #22c55e; }
.soal-dot.active.answered { background: #22c55e; color: white; }

/* Warning belum semua dijawab */
.warning-box {
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 13px;
    color: #c2410c;
    font-weight: 500;
    margin-bottom: 16px;
    display: none;
}
</style>
@endpush

@section('content')

<div class="quiz-wrapper">

    {{-- Header --}}
    <div class="quiz-header">
        <div class="quiz-title">🏆 {{ $challenge->judul_challenge }}</div>
        <div class="quiz-meta">
            <span>📝 {{ $challenge->soal->count() }} Soal</span>
            <span>⭐ {{ $challenge->exp }} EXP</span>
            <span>⏰ Tenggat: {{ \Carbon\Carbon::parse($challenge->tenggat_waktu)->format('d M Y, H:i') }}</span>
        </div>
    </div>

    {{-- Dots navigasi soal --}}
    <div class="soal-dots" id="soalDots">
        @foreach($challenge->soal as $i => $soal)
            <div class="soal-dot {{ $i === 0 ? 'active' : '' }}"
                 id="dot-{{ $i }}"
                 onclick="goToSoal({{ $i }})">
                {{ $i + 1 }}
            </div>
        @endforeach
    </div>

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

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

        {{-- Soal --}}
        @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

        {{-- Warning --}}
        <div class="warning-box" id="warningBox">
            ⚠️ Masih ada <span id="warningCount"></span> soal yang belum dijawab. Yakin ingin submit?
        </div>

        {{-- Navigasi --}}
        <div class="nav-buttons">
            <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()">
                🎯 Selesai & Submit
            </button>
        </div>
    </form>
</div>

@endsection

@push('scripts')
<script>
const totalSoal  = {{ $challenge->soal->count() }};
let currentSoal  = 0;
let jawaban      = {}; // { index: 'A'/'B'/'C'/'D' }

function goToSoal(index) {
    // Sembunyikan soal sekarang
    document.getElementById(`soal-${currentSoal}`).classList.remove('active');
    document.getElementById(`dot-${currentSoal}`).classList.remove('active');

    // Tampilkan soal target
    currentSoal = index;
    document.getElementById(`soal-${currentSoal}`).classList.add('active');

    const dot = document.getElementById(`dot-${currentSoal}`);
    dot.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;

    // Hapus selected dari semua opsi soal ini
    ['A','B','C','D'].forEach(o => {
        document.getElementById(`label-${soalIndex}-${o}`)?.classList.remove('selected');
    });

    // Tandai yang dipilih
    document.getElementById(`label-${soalIndex}-${opsi}`)?.classList.add('selected');
    document.getElementById(`radio-${soalIndex}-${opsi}`).checked = true;

    // Update dot
    const dot = document.getElementById(`dot-${soalIndex}`);
    dot.classList.add('answered');

    updateProgress();
}

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 = 'block';
    } else {
        btnNext.style.display   = 'block';
        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 konfirmasiSubmit() {
    const belum      = totalSoal - Object.keys(jawaban).length;
    const warningBox = document.getElementById('warningBox');

    if (belum > 0) {
        document.getElementById('warningCount').textContent = belum + ' soal';
        warningBox.style.display = 'block';
        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();
</script>
@endpush