@extends('admin.layouts.app')

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

@section('content')

<style>
.page-title {
    font-size: 30px;
    font-weight: 800;
    margin-bottom: 10px;
    margin-top: -20px;
}

.custom-card {
    background: white;
    border-radius: 20px;
    border: 2px solid #e5e5e5;
    padding: 25px;
}

.btn-primary-custom {
    background: #2b8ef3;
    color: white;
    border-radius: 10px;
    padding: 8px 18px;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    text-decoration: none;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
}

.table-header { background: #a5e6ba; }

.search-box {
    background: #a5e6ba;
    border-radius: 30px;
    padding: 6px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-box input {
    border: none;
    outline: none;
    background: transparent;
    width: 160px;
}

.action-icon { width: 20px; cursor: pointer; margin: 0 4px; }

.deadline-badge {
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 99px;
    display: inline-block;
}

.deadline-aktif { background: #dcfce7; color: #16a34a; }
.deadline-lewat { background: #fee2e2; color: #ef4444; }

.kelas-chip {
    display: inline-block;
    background: #e6f0ff;
    color: #1d4ed8;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 99px;
    margin: 1px;
}

.soal-count {
    background: #f0fdf4;
    color: #16a34a;
    font-size: 12px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 99px;
}

.alert-success-custom {
    background: #dcfce7;
    color: #166534;
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 16px;
    font-weight: 500;
    font-size: 14px;
}

/* ── MODAL SHARED ─────────────────────────────────── */
.modal-content {
    border-radius: 16px;
    border: none;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

/* Header kuning (Tambah) */
.modal-header-yellow {
    background: #f9c946;
    color: #1e293b;
    border-bottom: none;
    border-radius: 16px 16px 0 0;
    padding: 18px 24px;
}
.modal-header-yellow .modal-title { font-weight: 800; font-size: 18px; }
.modal-header-yellow .btn-close { filter: none; }

/* Header ungu (Edit — tetap seperti semula) */
.modal-header-challenge {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-bottom: none;
    border-radius: 16px 16px 0 0;
}
.modal-header-challenge .btn-close { filter: brightness(0) invert(1); }

.modal-body label { font-weight: 600; font-size: 13px; }

/* ── STEP INDICATOR ───────────────────────────────── */
.step-indicator {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 20px;
    background: #f8fafc;
    border-radius: 12px;
    padding: 12px 16px;
    border: 1px solid #e2e8f0;
}
.step-dot {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 800;
    flex-shrink: 0;
    transition: all 0.3s;
}
.step-dot.active   { background: #f9c946; color: #1e293b; box-shadow: 0 0 0 3px rgba(249,201,70,.3); }
.step-dot.done     { background: #16a34a; color: white; }
.step-dot.inactive { background: #e2e8f0; color: #94a3b8; }
.step-label {
    font-size: 12px;
    font-weight: 700;
    margin-left: 8px;
    transition: color 0.3s;
}
.step-label.active   { color: #1e293b; }
.step-label.inactive { color: #94a3b8; }
.step-line {
    flex: 1;
    height: 2px;
    background: #e2e8f0;
    margin: 0 12px;
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}
.step-line-fill {
    position: absolute;
    inset: 0;
    background: #16a34a;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}
.step-line-fill.filled { transform: scaleX(1); }

/* ── STEP PANELS ──────────────────────────────────── */
.step-panel { display: none; }
.step-panel.active { display: block; }

/* ── SOAL CARD ────────────────────────────────────── */
.soal-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    padding: 16px 18px;
    margin-bottom: 12px;
    position: relative;
}
.soal-card .soal-number {
    position: absolute;
    top: -10px;
    left: 16px;
    background: #667eea;
    color: white;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 99px;
}
.soal-card .btn-hapus-soal {
    position: absolute;
    top: 10px;
    right: 12px;
    background: #fee2e2;
    color: #ef4444;
    border: none;
    border-radius: 8px;
    width: 28px;
    height: 28px;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}
.soal-card .btn-hapus-soal:hover { background: #fca5a5; }

.opsi-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 8px;
}
.opsi-item { display: flex; flex-direction: column; gap: 4px; }
.opsi-item label { font-size: 12px; color: #64748b; font-weight: 600; }
.opsi-item input { border-radius: 8px; border: 1px solid #cbd5e1; padding: 6px 10px; font-size: 13px; }

.jawaban-row {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 10px;
    background: #fff;
    border-radius: 8px;
    padding: 8px 12px;
    border: 1px solid #e2e8f0;
}
.jawaban-row label { font-size: 12px; color: #64748b; font-weight: 600; min-width: 90px; }

.btn-tambah-soal {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 10px;
    padding: 9px 18px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    margin-top: 4px;
    font-family: 'Poppins', sans-serif;
}

.kelas-checkbox-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}
.kelas-check-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 8px 10px;
    cursor: pointer;
    transition: all 0.2s;
}
.kelas-check-item:hover { background: #e6f0ff; border-color: #2b8ef3; }
.kelas-check-item input[type="checkbox"] { cursor: pointer; }

.modal-dialog-fixed .modal-content {
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* form harus ikut flex agar modal-body bisa grow */
.modal-dialog-fixed form {
    display: contents;
}

.modal-dialog-fixed .modal-header,
.modal-dialog-fixed .modal-footer {
    flex-shrink: 0;
}

.modal-dialog-fixed .modal-body {
    flex: 1 1 auto;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding-bottom: 0;
}

/* step-indicator tidak ikut scroll */
.modal-dialog-fixed .step-indicator {
    flex-shrink: 0;
    margin-bottom: 16px;
}

.modal-dialog-fixed .step-panel {
    display: none;
}

.modal-dialog-fixed .step-panel.active {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
}

/* Step 1: scroll jika form terlalu panjang */
#tambah-step-1,
#edit-step-1 {
    overflow-y: auto;
    padding-right: 4px;
}

/* Step 2: soal-scroll-area yang mengelola scroll */
#tambah-step-2,
#edit-step-2 {
    overflow: hidden;
}

.soal-scroll-area {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding-right: 6px;
    scroll-behavior: smooth;
}

.soal-scroll-area::-webkit-scrollbar { width: 6px; }
.soal-scroll-area::-webkit-scrollbar-track { background: #f1f5f9; border-radius: 99px; }
.soal-scroll-area::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 99px; }
.soal-scroll-area::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

.section-divider {
    font-size: 13px;
    font-weight: 700;
    color: #667eea;
    border-bottom: 2px solid #e6f0ff;
    padding-bottom: 6px;
    margin: 16px 0 12px;
}

/* ── FOOTER BUTTONS ───────────────────────────────── */
.btn-green {
    background: #16a34a;
    color: white;
    border: none;
    border-radius: 10px;
    padding: 9px 22px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background 0.2s;
}
.btn-green:hover { background: #15803d; }
</style>

<h3 class="page-title">DAFTAR CHALLENGE</h3>

@if(session('success'))
    <div class="alert-success-custom">✅ {{ session('success') }}</div>
@endif

<div class="custom-card">
    <div class="d-flex justify-content-between align-items-center mb-3">
        <button class="btn-primary-custom" onclick="openTambahModal()">
            <img src="{{ asset('images/icon/main/add.png') }}" width="18" alt="Tambah"> Tambah Challenge
        </button>
        <form method="GET">
            <div class="search-box">
                <input type="text" name="search" placeholder="Cari challenge..."
                       value="{{ request('search') }}">
                <button style="border:none;background:none" type="submit">
                    <img src="{{ asset('images/icon/main/search.png') }}" width="18" alt="Cari">
                </button>
            </div>
        </form>
    </div>

    <table class="table text-center align-middle">
        <thead class="table-header">
            <tr>
                <th>No</th>
                <th>Judul Challenge</th>
                <th>Kelas</th>
                <th>Soal</th>
                <th>Total EXP</th>
                <th>Tenggat</th>
                <th>Aksi</th>
            </tr>
        </thead>
        <tbody>
            @forelse($challenges as $i => $ch)
            @php $isLewat = \Carbon\Carbon::parse($ch->tenggat_waktu)->isPast(); @endphp
            <tr>
                <td>{{ $challenges->firstItem() + $i }}</td>
                <td style="text-align:left">
                    <div style="font-weight:700;color:#1e293b">{{ $ch->judul_challenge }}</div>
                    @if($ch->deskripsi)
                        <div style="font-size:12px;color:#94a3b8">{{ Str::limit($ch->deskripsi, 50) }}</div>
                    @endif
                </td>
                <td>
                    @foreach($ch->kelas as $k)
                        <span class="kelas-chip">{{ $k->tingkat }} {{ $k->nama_kelas }}</span>
                    @endforeach
                </td>
                <td><span class="soal-count">{{ $ch->soal_count }} soal</span></td>
                <td style="font-weight:700;color:#667eea">{{ $ch->exp }} EXP</td>
                <td>
                    <span class="deadline-badge {{ $isLewat ? 'deadline-lewat' : 'deadline-aktif' }}">
                        {{ $isLewat ? '⏰ Lewat' : '✅ Aktif' }}
                    </span>
                    <div style="font-size:11px;color:#64748b;margin-top:3px">
                        {{ \Carbon\Carbon::parse($ch->tenggat_waktu)->format('d M Y, H:i') }}
                    </div>
                </td>
                <td>
                    <button onclick="openEditModal({{ $ch->id_challenge }})"
                            style="border:none;background:none">
                        <img src="{{ asset('images/icon/main/edit.png') }}" class="action-icon" alt="Edit">
                    </button>
                    <a href="{{ route('admin.challenge.show', $ch->id_challenge) }}"
                       style="border:none;background:none;display:inline">
                        <img src="{{ asset('images/icon/main/search.png') }}" class="action-icon" alt="Detail">
                    </a>
                    <form action="{{ route('admin.challenge.destroy', $ch->id_challenge) }}"
                          method="POST" class="d-inline"
                          onsubmit="return confirm('Yakin hapus challenge ini?')">
                        @csrf @method('DELETE')
                        <button type="submit" style="border:none;background:none">
                            <img src="{{ asset('images/icon/main/del.png') }}" class="action-icon" alt="Hapus">
                        </button>
                    </form>
                </td>
            </tr>
            @empty
            <tr>
                <td colspan="7" class="text-muted py-4">Belum ada challenge.</td>
            </tr>
            @endforelse
        </tbody>
    </table>

    <div class="d-flex justify-content-end">{{ $challenges->links() }}</div>
</div>


{{-- ============================================================ --}}
{{-- MODAL TAMBAH  (2-step)                                        --}}
{{-- ============================================================ --}}
<div class="modal fade" id="modalTambah" tabindex="-1">
  <div class="modal-dialog modal-xl modal-dialog-centered modal-dialog-fixed">
    <div class="modal-content">

      {{-- Header kuning --}}
      <div class="modal-header modal-header-yellow">
        <h5 class="modal-title">🏆 Tambah Challenge Baru</h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
      </div>

      <form action="{{ route('admin.challenge.store') }}" method="POST" id="formTambah">
        @csrf
        <div class="modal-body">

          {{-- Step Indicator --}}
          <div class="step-indicator" style="flex-shrink:0">
            <div class="step-dot active" id="tambah-dot-1">1</div>
            <span class="step-label active" id="tambah-label-1">Informasi Challenge</span>
            <div class="step-line">
              <div class="step-line-fill" id="tambah-line-fill"></div>
            </div>
            <div class="step-dot inactive" id="tambah-dot-2">2</div>
            <span class="step-label inactive" id="tambah-label-2">Daftar Soal</span>
          </div>

          {{-- ─── STEP 1: Info Challenge ─── --}}
          <div class="step-panel active" id="tambah-step-1">

            <div class="section-divider">📋 Informasi Challenge</div>
            <div class="row g-3 mb-2">
              <div class="col-8">
                <label>Judul Challenge <span class="text-danger">*</span></label>
                <input type="text" name="judul_challenge" id="tambah-judul" class="form-control"
                       placeholder="Contoh: Challenge Matematika Minggu Ini">
              </div>
              <div class="col-4">
                <label>Total EXP <span class="text-danger">*</span></label>
                <input type="number" name="exp" id="tambah-exp" class="form-control" value="100" min="0">
              </div>
            </div>

            <div class="mb-3">
              <label>Deskripsi</label>
              <textarea name="deskripsi" class="form-control" rows="2"
                        placeholder="Deskripsi singkat challenge (opsional)"></textarea>
            </div>

            <div class="row g-3 mb-3">
              <div class="col-6">
                <label>Tenggat Waktu <span class="text-danger">*</span></label>
                <input type="datetime-local" name="tenggat_waktu" id="tambah-tenggat" class="form-control"
                       min="{{ now()->format('Y-m-d\TH:i') }}">
              </div>
              <div class="col-6">
                <label>Badge Reward</label>
                <select name="id_badge" class="form-control">
                  <option value="">-- Tanpa Badge --</option>
                  @foreach($badges as $badge)
                    <option value="{{ $badge->id_badge }}">{{ $badge->nama_badge }}</option>
                  @endforeach
                </select>
              </div>
            </div>

            <div class="section-divider">🏫 Target Kelas</div>
            <div class="kelas-checkbox-grid mb-1">
              @foreach($kelas as $k)
              <label class="kelas-check-item">
                <input type="checkbox" name="id_kelas[]" value="{{ $k->id_kelas }}">
                <span style="font-size:13px;font-weight:600">{{ $k->tingkat }} {{ $k->nama_kelas }}</span>
              </label>
              @endforeach
            </div>

          </div>{{-- /step-1 --}}

          {{-- ─── STEP 2: Soal ─── --}}
          <div class="step-panel" id="tambah-step-2">

            <div class="section-divider" style="flex-shrink:0">📝 Daftar Soal</div>
            <div id="soalContainer" class="soal-scroll-area"></div>
            <div style="flex-shrink:0;padding-top:8px">
              <button type="button" class="btn-tambah-soal" onclick="tambahSoal('soalContainer')">
                + Tambah Soal
              </button>
            </div>

          </div>{{-- /step-2 --}}

        </div>{{-- /modal-body --}}

        <div class="modal-footer" style="gap:8px">
          {{-- Batal (step 1) / Kembali (step 2) --}}
          <button type="button" class="btn btn-secondary" id="tambah-btn-back"
                  data-bs-dismiss="modal">Batal</button>

          {{-- Next (step 1) --}}
          <button type="button" class="btn-green" id="tambah-btn-next"
                  onclick="tambahGoStep2()">
            Berikutnya →
          </button>

          {{-- Submit (step 2, hidden awalnya) --}}
          <button type="submit" class="btn-green" id="tambah-btn-submit" style="display:none">
            💾 Simpan Challenge
          </button>
        </div>

      </form>
    </div>
  </div>
</div>


{{-- ============================================================ --}}
{{-- MODAL EDIT                                                    --}}
{{-- ============================================================ --}}
<div class="modal fade" id="modalEdit" tabindex="-1">
  <div class="modal-dialog modal-xl modal-dialog-centered modal-dialog-fixed">
    <div class="modal-content">
      <div class="modal-header modal-header-yellow">
        <h5 class="modal-title">✏️ Edit Challenge</h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
      </div>

      <form id="formEdit" method="POST">
        @csrf @method('PUT')
        <div class="modal-body">

          {{-- Step Indicator --}}
          <div class="step-indicator" style="flex-shrink:0">
            <div class="step-dot active" id="edit-dot-1">1</div>
            <span class="step-label active" id="edit-label-1">Informasi Challenge</span>
            <div class="step-line">
              <div class="step-line-fill" id="edit-line-fill"></div>
            </div>
            <div class="step-dot inactive" id="edit-dot-2">2</div>
            <span class="step-label inactive" id="edit-label-2">Daftar Soal</span>
          </div>

          {{-- ─── STEP 1: Info Challenge ─── --}}
          <div class="step-panel active" id="edit-step-1">

            <div class="section-divider">📋 Informasi Challenge</div>
            <div class="row g-3 mb-2">
              <div class="col-8">
                <label>Judul Challenge <span class="text-danger">*</span></label>
                <input type="text" name="judul_challenge" id="editJudul" class="form-control" required>
              </div>
              <div class="col-4">
                <label>Total EXP <span class="text-danger">*</span></label>
                <input type="number" name="exp" id="editExp" class="form-control" min="0" required>
              </div>
            </div>

            <div class="mb-3">
              <label>Deskripsi</label>
              <textarea name="deskripsi" id="editDeskripsi" class="form-control" rows="2"></textarea>
            </div>

            <div class="row g-3 mb-3">
              <div class="col-6">
                <label>Tenggat Waktu <span class="text-danger">*</span></label>
                <input type="datetime-local" name="tenggat_waktu" id="editTenggat" class="form-control" required>
              </div>
              <div class="col-6">
                <label>Badge Reward</label>
                <select name="id_badge" id="editBadge" class="form-control">
                  <option value="">-- Tanpa Badge --</option>
                  @foreach($badges as $badge)
                    <option value="{{ $badge->id_badge }}">{{ $badge->nama_badge }}</option>
                  @endforeach
                </select>
              </div>
            </div>

            <div class="section-divider">🏫 Target Kelas</div>
            <div class="kelas-checkbox-grid mb-1" id="editKelasContainer">
              @foreach($kelas as $k)
              <label class="kelas-check-item">
                <input type="checkbox" name="id_kelas[]"
                       value="{{ $k->id_kelas }}" class="edit-kelas-check">
                <span style="font-size:13px;font-weight:600">{{ $k->tingkat }} {{ $k->nama_kelas }}</span>
              </label>
              @endforeach
            </div>

          </div>{{-- /edit-step-1 --}}

          {{-- ─── STEP 2: Soal ─── --}}
          <div class="step-panel" id="edit-step-2">

            <div class="section-divider" style="flex-shrink:0">📝 Daftar Soal</div>
            <div id="editSoalContainer" class="soal-scroll-area"></div>
            <div style="flex-shrink:0;padding-top:8px">
              <button type="button" class="btn-tambah-soal" onclick="tambahSoal('editSoalContainer')">
                + Tambah Soal
              </button>
            </div>

          </div>{{-- /edit-step-2 --}}

        </div>{{-- /modal-body --}}

        <div class="modal-footer" style="gap:8px">
          <button type="button" class="btn btn-secondary" id="edit-btn-back"
                  data-bs-dismiss="modal">Batal</button>
          <button type="button" class="btn-green" id="edit-btn-next"
                  onclick="editGoStep2()">
            Berikutnya →
          </button>
          <button type="submit" class="btn-green" id="edit-btn-submit" style="display:none">
            💾 Update Challenge
          </button>
        </div>

      </form>
    </div>
  </div>
</div>


<script>
let soalCountTambah = 0;
let soalCountEdit   = 0;

/* ══════════════════════════════════════════════════
   STEP NAVIGATION — MODAL TAMBAH
══════════════════════════════════════════════════ */
function tambahGoStep2() {
    // Validasi step 1
    const judul   = document.getElementById('tambah-judul').value.trim();
    const tenggat = document.getElementById('tambah-tenggat').value;
    if (!judul)   { alert('Judul challenge wajib diisi.'); return; }
    if (!tenggat) { alert('Tenggat waktu wajib diisi.'); return; }

    // Transisi
    document.getElementById('tambah-step-1').classList.remove('active');
    document.getElementById('tambah-step-2').classList.add('active');

    // Indikator
    document.getElementById('tambah-dot-1').classList.replace('active', 'done');
    document.getElementById('tambah-dot-1').textContent = '✓';
    document.getElementById('tambah-label-1').classList.replace('active', 'inactive');
    document.getElementById('tambah-dot-2').classList.replace('inactive', 'active');
    document.getElementById('tambah-label-2').classList.replace('inactive', 'active');
    document.getElementById('tambah-line-fill').classList.add('filled');

    // Footer buttons
    document.getElementById('tambah-btn-next').style.display   = 'none';
    document.getElementById('tambah-btn-submit').style.display = '';
    const backBtn = document.getElementById('tambah-btn-back');
    backBtn.removeAttribute('data-bs-dismiss');
    backBtn.textContent = '← Kembali';
    backBtn.onclick = tambahGoStep1;
}

function tambahGoStep1() {
    document.getElementById('tambah-step-2').classList.remove('active');
    document.getElementById('tambah-step-1').classList.add('active');

    document.getElementById('tambah-dot-1').classList.replace('done', 'active');
    document.getElementById('tambah-dot-1').textContent = '1';
    document.getElementById('tambah-label-1').classList.replace('inactive', 'active');
    document.getElementById('tambah-dot-2').classList.replace('active', 'inactive');
    document.getElementById('tambah-label-2').classList.replace('active', 'inactive');
    document.getElementById('tambah-line-fill').classList.remove('filled');

    document.getElementById('tambah-btn-next').style.display   = '';
    document.getElementById('tambah-btn-submit').style.display = 'none';
    const backBtn = document.getElementById('tambah-btn-back');
    backBtn.setAttribute('data-bs-dismiss', 'modal');
    backBtn.textContent = 'Batal';
    backBtn.onclick = null;
}


/* ══════════════════════════════════════════════════
   STEP NAVIGATION — MODAL EDIT
══════════════════════════════════════════════════ */
function editGoStep2() {
    const judul   = document.getElementById('editJudul').value.trim();
    const tenggat = document.getElementById('editTenggat').value;
    if (!judul)   { alert('Judul challenge wajib diisi.'); return; }
    if (!tenggat) { alert('Tenggat waktu wajib diisi.'); return; }

    document.getElementById('edit-step-1').classList.remove('active');
    document.getElementById('edit-step-2').classList.add('active');

    document.getElementById('edit-dot-1').classList.replace('active', 'done');
    document.getElementById('edit-dot-1').textContent = '✓';
    document.getElementById('edit-label-1').classList.replace('active', 'inactive');
    document.getElementById('edit-dot-2').classList.replace('inactive', 'active');
    document.getElementById('edit-label-2').classList.replace('inactive', 'active');
    document.getElementById('edit-line-fill').classList.add('filled');

    document.getElementById('edit-btn-next').style.display   = 'none';
    document.getElementById('edit-btn-submit').style.display = '';
    const backBtn = document.getElementById('edit-btn-back');
    backBtn.removeAttribute('data-bs-dismiss');
    backBtn.textContent = '← Kembali';
    backBtn.onclick = editGoStep1;
}

function editGoStep1() {
    document.getElementById('edit-step-2').classList.remove('active');
    document.getElementById('edit-step-1').classList.add('active');

    document.getElementById('edit-dot-1').classList.replace('done', 'active');
    document.getElementById('edit-dot-1').textContent = '1';
    document.getElementById('edit-label-1').classList.replace('inactive', 'active');
    document.getElementById('edit-dot-2').classList.replace('active', 'inactive');
    document.getElementById('edit-label-2').classList.replace('active', 'inactive');
    document.getElementById('edit-line-fill').classList.remove('filled');

    document.getElementById('edit-btn-next').style.display   = '';
    document.getElementById('edit-btn-submit').style.display = 'none';
    const backBtn = document.getElementById('edit-btn-back');
    backBtn.setAttribute('data-bs-dismiss', 'modal');
    backBtn.textContent = 'Batal';
    backBtn.onclick = null;
}

/* ══════════════════════════════════════════════════
   EXP HELPER — hitung & sebar exp_per_soal otomatis
══════════════════════════════════════════════════ */
function getExpInput(containerId) {
    // Tambah  → pakai #tambah-exp | Edit → pakai #editExp
    return containerId === 'editSoalContainer'
        ? document.getElementById('editExp')
        : document.getElementById('tambah-exp');
}

function recalcExp(containerId) {
    const expInput = getExpInput(containerId);
    const totalExp = parseInt(expInput ? expInput.value : 0) || 0;
    const cards    = document.querySelectorAll(`#${containerId} .soal-card`);
    const jumlah   = cards.length;
    if (jumlah === 0) return;

    // Bagi rata, sisa EXP diberikan ke soal terakhir
    const base      = Math.floor(totalExp / jumlah);
    const remainder = totalExp - base * jumlah;

    cards.forEach((card, i) => {
        const hiddenInput = card.querySelector('input[name="exp_per_soal[]"]');
        const displaySpan = card.querySelector('.exp-per-soal-display');
        const val = base + (i === jumlah - 1 ? remainder : 0);
        if (hiddenInput) hiddenInput.value = val;
        if (displaySpan) displaySpan.textContent = val + ' EXP';
    });
}

/* ══════════════════════════════════════════════════
   SOAL HELPERS
══════════════════════════════════════════════════ */
function tambahSoal(containerId, data = null) {
    const isEdit    = containerId === 'editSoalContainer';
    const count     = isEdit ? ++soalCountEdit : ++soalCountTambah;
    const container = document.getElementById(containerId);

    const card = document.createElement('div');
    card.className = 'soal-card';
    card.innerHTML = `
        <span class="soal-number">Soal ${count}</span>
        <button type="button" class="btn-hapus-soal" onclick="hapusSoal(this, '${containerId}')">✕</button>

        <div class="mb-2" style="margin-top:10px">
            <label>Pertanyaan <span class="text-danger">*</span></label>
            <textarea name="pertanyaan[]" class="form-control" rows="2"
                      placeholder="Tuliskan pertanyaan..." required>${data ? data.pertanyaan : ''}</textarea>
        </div>

        <div class="opsi-grid">
            <div class="opsi-item">
                <label>Opsi A</label>
                <input type="text" name="opsi_a[]" class="form-control"
                       placeholder="Opsi A" required value="${data ? data.opsi_a : ''}">
            </div>
            <div class="opsi-item">
                <label>Opsi B</label>
                <input type="text" name="opsi_b[]" class="form-control"
                       placeholder="Opsi B" required value="${data ? data.opsi_b : ''}">
            </div>
            <div class="opsi-item">
                <label>Opsi C</label>
                <input type="text" name="opsi_c[]" class="form-control"
                       placeholder="Opsi C" required value="${data ? data.opsi_c : ''}">
            </div>
            <div class="opsi-item">
                <label>Opsi D</label>
                <input type="text" name="opsi_d[]" class="form-control"
                       placeholder="Opsi D" required value="${data ? data.opsi_d : ''}">
            </div>
        </div>

        <div class="jawaban-row">
            <label>Jawaban Benar</label>
            <select name="jawaban_benar[]" class="form-select" style="width:100px" required>
                ${['A','B','C','D'].map(o =>
                    `<option value="${o}" ${data && data.jawaban_benar === o ? 'selected' : ''}>${o}</option>`
                ).join('')}
            </select>
            {{-- Hidden — nilainya diisi recalcExp() --}}
            <input type="hidden" name="exp_per_soal[]" value="0">
            <span style="margin-left:auto;background:#f0fdf4;color:#16a34a;font-size:12px;font-weight:700;
                         padding:4px 12px;border-radius:99px;white-space:nowrap">
                ⚡ <span class="exp-per-soal-display">0 EXP</span>
            </span>
        </div>
    `;

    container.appendChild(card);
    renumberSoal(containerId);
    recalcExp(containerId);   // update semua kartu setelah soal baru ditambah

    // Scroll ke soal baru
    const scrollArea = container.closest('.soal-scroll-area') || container;
    scrollArea.scrollTop = scrollArea.scrollHeight;
}

function hapusSoal(btn, containerId) {
    const container = document.getElementById(containerId);
    if (container.querySelectorAll('.soal-card').length <= 1) {
        alert('Minimal harus ada 1 soal.');
        return;
    }
    btn.closest('.soal-card').remove();
    renumberSoal(containerId);
    recalcExp(containerId);   // update ulang setelah soal dihapus
}

function renumberSoal(containerId) {
    document.querySelectorAll(`#${containerId} .soal-card`).forEach((card, i) => {
        const num = card.querySelector('.soal-number');
        if (num) num.textContent = `Soal ${i + 1}`;
    });
}

/* ══════════════════════════════════════════════════
   OPEN MODAL TAMBAH
══════════════════════════════════════════════════ */
function openTambahModal() {
    // Reset state
    soalCountTambah = 0;
    document.getElementById('soalContainer').innerHTML = '';
    document.getElementById('formTambah').reset();

    // Paksa step 1
    tambahGoStep1();

    // Default 1 soal
    tambahSoal('soalContainer');

    // Recalc EXP otomatis setiap kali angka EXP di step-1 berubah
    const expElTambah = document.getElementById('tambah-exp');
    expElTambah.oninput = () => recalcExp('soalContainer');

    new bootstrap.Modal(document.getElementById('modalTambah')).show();
}

/* ══════════════════════════════════════════════════
   OPEN MODAL EDIT
══════════════════════════════════════════════════ */
async function openEditModal(idChallenge) {
    soalCountEdit = 0;
    document.getElementById('editSoalContainer').innerHTML = '';

    // Reset ke step 1
    editGoStep1();

    const res  = await fetch(`/admin/challenge/${idChallenge}/edit-data`);
    const data = await res.json();

    document.getElementById('formEdit').action         = `/admin/challenge/${idChallenge}`;
    document.getElementById('editJudul').value         = data.judul_challenge;
    document.getElementById('editExp').value           = data.exp;
    document.getElementById('editDeskripsi').value     = data.deskripsi ?? '';
    document.getElementById('editBadge').value         = data.id_badge ?? '';

    const dt  = new Date(data.tenggat_waktu);
    const pad = n => String(n).padStart(2, '0');
    document.getElementById('editTenggat').value =
        `${dt.getFullYear()}-${pad(dt.getMonth()+1)}-${pad(dt.getDate())}T${pad(dt.getHours())}:${pad(dt.getMinutes())}`;

    document.querySelectorAll('.edit-kelas-check').forEach(cb => {
        cb.checked = data.kelas.includes(parseInt(cb.value));
    });

    data.soal.forEach(s => tambahSoal('editSoalContainer', s));

    const expElEdit = document.getElementById('editExp');
    expElEdit.oninput = () => recalcExp('editSoalContainer');

    // Recalc sekali saat modal dibuka
    recalcExp('editSoalContainer');

    new bootstrap.Modal(document.getElementById('modalEdit')).show();
}
</script>

@endsection