@extends('mahasiswa.layout', [
    'title' => 'Isi KRS',
    'heading' => 'Pengisian KRS',
    'subheading' => 'Ambil mata kuliah pada tahun akademik aktif dan pantau status persetujuannya.',
])

@section('page_actions')
    <a href="{{ route('mahasiswa.krs.print') }}" class="btn btn-outline-primary">
        <i class="fas fa-print mr-1"></i>
        Cetak KRS
    </a>
@endsection

@section('mahasiswa-content')
    @if (! $activeYear)
        <div class="alert alert-warning">Tahun akademik aktif belum diatur, jadi KRS belum bisa diajukan.</div>
    @elseif ($student->status !== 'aktif')
        <div class="alert alert-warning">
            Status akademik kamu saat ini <strong>{{ strtoupper($student->status) }}</strong>. Pengajuan KRS dikunci sampai status kembali aktif.
            <a href="{{ route('mahasiswa.status.index') }}" class="alert-link">Kelola pengajuan status akademik</a>.
        </div>

        <div class="card">
            <div class="card-header">
                <h3 class="card-title">KRS Semester Berjalan</h3>
            </div>
            <div class="card-body">
                @forelse ($currentKrs as $item)
                    <div class="callout callout-{{ $item->status === 'disetujui' ? 'success' : ($item->status === 'ditolak' ? 'danger' : 'warning') }}">
                        <h5 class="mb-1">{{ $item->jadwalKuliah?->mataKuliah?->nama_mk ?? '-' }}</h5>
                        <p class="mb-1 text-muted">{{ $item->jadwalKuliah?->mataKuliah?->kode_mk ?? '-' }} - {{ $item->jadwalKuliah?->mataKuliah?->sks ?? 0 }} SKS</p>
                        <p class="mb-0">{{ $item->jadwalKuliah?->hari ?? '-' }} / {{ $item->jadwalKuliah?->jam_mulai ?? '-' }} - {{ $item->jadwalKuliah?->jam_selesai ?? '-' }}</p>
                    </div>
                @empty
                    <div class="alert alert-light border mb-0">Belum ada KRS yang diajukan pada semester aktif.</div>
                @endforelse
            </div>
        </div>
    @else
        <div class="row">
            <div class="col-lg-7">
                <div class="card">
                    <div class="card-header">
                        <h3 class="card-title">Pilih Jadwal Kuliah {{ $activeYear->tahun }} / {{ $activeYear->semester }}</h3>
                    </div>
                    <form method="POST" action="{{ route('mahasiswa.krs.store') }}">
                        @csrf
                        <div class="card-body">
                            @php($takenScheduleIds = $currentKrs->whereIn('status', ['pending', 'disetujui'])->pluck('jadwal_kuliah_id')->all())
                            <div class="table-responsive">
                                <table class="table table-bordered table-hover">
                                    <thead>
                                        <tr>
                                            <th width="60">Pilih</th>
                                            <th>Mata Kuliah</th>
                                            <th>Dosen</th>
                                            <th>Jadwal</th>
                                            <th>SKS</th>
                                        </tr>
                                    </thead>
                                    <tbody>
                                        @forelse ($availableSchedules as $schedule)
                                            @php($alreadyTaken = in_array($schedule->id, $takenScheduleIds, true))
                                            @php($capacity = $schedule->effectiveCapacity())
                                            @php($occupied = $schedule->activeKrsCount())
                                            @php($remainingCapacity = $schedule->remainingCapacity())
                                            @php($isFull = ! $schedule->hasAvailableCapacity())
                                            <tr>
                                                <td class="text-center">
                                                    <input type="checkbox" name="jadwal_kuliah_ids[]" value="{{ $schedule->id }}" @checked(is_array(old('jadwal_kuliah_ids')) && in_array($schedule->id, old('jadwal_kuliah_ids'), false)) @disabled($alreadyTaken || $isFull)>
                                                </td>
                                                <td>
                                                    <strong>{{ $schedule->mataKuliah?->nama_mk ?? '-' }}</strong>
                                                    <div class="text-muted text-sm">
                                                        {{ $schedule->mataKuliah?->kode_mk ?? '-' }}
                                                        @if ($capacity !== null)
                                                            <span class="ml-2">Slot {{ $occupied }}/{{ $capacity }}</span>
                                                            @if ($isFull)
                                                                <span class="badge badge-danger ml-1">Penuh</span>
                                                            @elseif ($remainingCapacity !== null)
                                                                <span class="badge badge-info ml-1">Sisa {{ $remainingCapacity }}</span>
                                                            @endif
                                                        @else
                                                            <span class="badge badge-secondary ml-2">Kapasitas fleksibel</span>
                                                        @endif
                                                    </div>
                                                </td>
                                                <td>{{ $schedule->dosen?->nama_dosen ?? '-' }}</td>
                                                <td>{{ $schedule->hari }} / {{ $schedule->jam_mulai }} - {{ $schedule->jam_selesai }}</td>
                                                <td>{{ $schedule->mataKuliah?->sks ?? 0 }}</td>
                                            </tr>
                                        @empty
                                            <tr>
                                                <td colspan="5" class="text-center text-muted">Belum ada jadwal kuliah yang tersedia untuk prodi kamu.</td>
                                            </tr>
                                        @endforelse
                                    </tbody>
                                </table>
                            </div>
                        </div>
                        @if ($availableSchedules->isNotEmpty())
                            <div class="card-footer">
                                <button type="submit" class="btn btn-primary">Ajukan KRS</button>
                            </div>
                        @endif
                    </form>
                </div>
            </div>

            <div class="col-lg-5">
                <div class="card">
                    <div class="card-header">
                        <h3 class="card-title">KRS Semester Berjalan</h3>
                    </div>
                    <div class="card-body">
                        @forelse ($currentKrs as $item)
                            <div class="callout callout-{{ $item->status === 'disetujui' ? 'success' : ($item->status === 'ditolak' ? 'danger' : 'warning') }}">
                                <h5 class="mb-1">{{ $item->jadwalKuliah?->mataKuliah?->nama_mk ?? '-' }}</h5>
                                <p class="mb-1 text-muted">{{ $item->jadwalKuliah?->mataKuliah?->kode_mk ?? '-' }} - {{ $item->jadwalKuliah?->mataKuliah?->sks ?? 0 }} SKS</p>
                                <p class="mb-1">{{ $item->jadwalKuliah?->hari ?? '-' }} / {{ $item->jadwalKuliah?->jam_mulai ?? '-' }} - {{ $item->jadwalKuliah?->jam_selesai ?? '-' }}</p>
                                @if ($item->status === 'ditolak')
                                    <p class="mb-2 text-sm text-muted">Jadwal ini bisa kamu ajukan ulang selama slot kelas masih tersedia.</p>
                                @endif
                                <div class="d-flex justify-content-between align-items-center">
                                    <span class="badge badge-{{ $item->status === 'disetujui' ? 'success' : ($item->status === 'ditolak' ? 'danger' : 'warning') }}">
                                        {{ ucfirst($item->status) }}
                                    </span>
                                    @if ($item->status === 'pending')
                                        <form method="POST" action="{{ route('mahasiswa.krs.destroy', $item) }}" onsubmit="return confirm('Batalkan KRS ini?');">
                                            @csrf
                                            @method('DELETE')
                                            <button type="submit" class="btn btn-sm btn-outline-danger">Batalkan</button>
                                        </form>
                                    @endif
                                </div>
                            </div>
                        @empty
                            <div class="alert alert-light border mb-0">Belum ada KRS yang diajukan pada semester aktif.</div>
                        @endforelse
                    </div>
                </div>
            </div>
        </div>
    @endif
@endsection