@extends('layouts.school')
@section('title', 'Examination Attendance')
@section('header', 'Examination Attendance')

@section('content')
    <div class="mb-6">
        <form method="GET" class="flex flex-wrap items-end gap-3">
            <div>
                <label for="exam_id" class="block text-xs font-medium text-gray-700">Examination</label>
                <select name="exam_id" id="exam_id" onchange="this.form.submit()" class="mt-1 block w-full rounded-lg border border-gray-300 px-3 py-2 text-sm shadow-sm focus:border-primary-500 focus:outline-none focus:ring-1 focus:ring-primary-500">
                    <option value="">-- Choose exam --</option>
                    @foreach ($exams as $e)
                        <option value="{{ $e->id }}" {{ $exam && $exam->id === $e->id ? 'selected' : '' }}>
                            {{ $e->name }} ({{ $e->classroom?->name ?? '—' }})
                        </option>
                    @endforeach
                </select>
            </div>
            <div>
                <label for="subject_id" class="block text-xs font-medium text-gray-700">Subject</label>
                <select name="subject_id" id="subject_id" onchange="this.form.submit()" class="mt-1 block w-full rounded-lg border border-gray-300 px-3 py-2 text-sm shadow-sm focus:border-primary-500 focus:outline-none focus:ring-1 focus:ring-primary-500">
                    <option value="">-- All subjects --</option>
                    @foreach ($subjects as $s)
                        <option value="{{ $s->id }}" {{ $examSubject && $examSubject->id === $s->id ? 'selected' : '' }}>{{ $s->name }}</option>
                    @endforeach
                </select>
            </div>
        </form>
    </div>

    @if ($exam && $examSubject)
        <form method="POST" action="{{ route('school.exams.attendance.save', $schoolId) }}">
            @csrf
            <input type="hidden" name="exam_id" value="{{ $exam->id }}">
            <input type="hidden" name="subject_id" value="{{ $examSubject->id }}">

            <div class="mb-4 rounded-xl bg-white p-6 shadow-sm ring-1 ring-gray-900/5">
                <h2 class="text-lg font-semibold text-gray-900">{{ $exam->name }} — {{ $examSubject->name }}</h2>
                <p class="text-sm text-gray-500">{{ $candidates->count() }} candidate(s) for this subject</p>

                <div class="mt-6 overflow-x-auto rounded-lg border border-gray-200">
                    <table class="min-w-full divide-y divide-gray-200">
                        <thead class="bg-gray-50">
                            <tr>
                                <th class="px-4 py-3 text-left text-xs font-semibold text-gray-500 uppercase">Student</th>
                                <th class="px-4 py-3 text-left text-xs font-semibold text-gray-500 uppercase">Status</th>
                                <th class="px-4 py-3 text-left text-xs font-semibold text-gray-500 uppercase">Remark</th>
                            </tr>
                        </thead>
                        <tbody class="divide-y divide-gray-100">
                            @forelse($candidates as $candidate)
                                @php
                                    $record = $attendance->get($candidate->student_id);
                                @endphp
                                <tr class="hover:bg-gray-50">
                                    <td class="px-4 py-2.5">
                                        <input type="hidden" name="attendance[{{ $candidate->student_id }}][student_id]" value="{{ $candidate->student_id }}">
                                        <p class="text-sm font-medium text-gray-900">{{ $candidate->student?->first_name }} {{ $candidate->student?->last_name }}</p>
                                        <p class="text-xs text-gray-500">#{{ $candidate->student?->admission_no ?? 'N/A' }}</p>
                                    </td>
                                    <td class="px-4 py-2.5">
                                        <select name="attendance[{{ $candidate->student_id }}][status]" class="rounded-lg border border-gray-300 px-3 py-2 text-sm shadow-sm focus:border-primary-500 focus:outline-none focus:ring-1 focus:ring-primary-500">
                                            @foreach (['present' => 'Present', 'absent' => 'Absent', 'late' => 'Late', 'excused' => 'Excused'] as $val => $label)
                                                <option value="{{ $val }}" {{ $record && $record->status === $val ? 'selected' : '' }}>{{ $label }}</option>
                                            @endforeach
                                        </select>
                                    </td>
                                    <td class="px-4 py-2.5">
                                        <input type="text" name="attendance[{{ $candidate->student_id }}][remark]" value="{{ $record?->remark ?? '' }}" placeholder="Optional remark" class="block w-full rounded-lg border border-gray-300 px-3 py-2 text-sm shadow-sm focus:border-primary-500 focus:outline-none focus:ring-1 focus:ring-primary-500">
                                    </td>
                                </tr>
                            @empty
                                <tr><td colspan="3" class="px-4 py-12 text-center text-sm text-gray-500">No candidates registered for this examination.</td></tr>
                            @endforelse
                        </tbody>
                    </table>
                </div>

                @if ($candidates->isNotEmpty())
                    <div class="mt-4">
                        <button type="submit" class="rounded-lg bg-primary-600 px-4 py-2 text-sm font-semibold text-white shadow-sm hover:bg-primary-700">Save Attendance</button>
                    </div>
                @endif
            </div>
        </form>
    @else
        <div class="rounded-xl bg-white p-12 text-center shadow-sm ring-1 ring-gray-900/5">
            <p class="text-sm text-gray-500">Select an examination and subject to mark attendance.</p>
        </div>
    @endif
@endsection