@extends('layouts.examiner')
@section('title', 'Upload Questions')

@section('content')
<h1 class="h3 mb-4 text-gray-800">Upload Questions (Excel)</h1>

@if(isset($results))
{{-- ── Results table after upload ─────────────────────────────── --}}
<div class="card shadow mb-4">
    <div class="card-header py-3 d-flex justify-content-between align-items-center">
        <h6 class="m-0 font-weight-bold text-primary">Uploaded Questions</h6>
        <a href="{{ route('examiner.questions.upload') }}" class="btn btn-sm btn-secondary">Upload Another</a>
    </div>
    <div class="card-body p-0">
        <div class="table-responsive">
            <table class="table table-bordered table-sm mb-0" id="myTable">
                <thead class="thead-light">
                    <tr>
                        <th>S/N</th>
                        <th>QUESTION</th>
                        <th>CORRECT OPTION</th>
                        <th>OPTION 1</th>
                        <th>OPTION 2</th>
                        <th>OPTION 3</th>
                        <th>COURSE CODE</th>
                        <th>STATUS</th>
                    </tr>
                </thead>
                <tbody>
                    @foreach($results as $i => $r)
                    <tr>
                        <td>{{ $i + 1 }}</td>
                        <td>{{ $r['row'][1] ?? '' }}</td>
                        <td>{{ $r['row'][2] ?? '' }}</td>
                        <td>{{ $r['row'][3] ?? '' }}</td>
                        <td>{{ $r['row'][4] ?? '' }}</td>
                        <td>{{ $r['row'][5] ?? '' }}</td>
                        <td>{{ $r['row'][6] ?? '' }}</td>
                        <td>
                            <span class="badge badge-{{ $r['status'] === 'Successful' ? 'success' : 'danger' }}">
                                {{ $r['status'] }}
                            </span>
                        </td>
                    </tr>
                    @endforeach
                </tbody>
            </table>
        </div>
    </div>
</div>
@else
{{-- ── Upload form ─────────────────────────────────────────────── --}}
<div class="row">
    <div class="col-md-7">
        <div class="card shadow mb-4">
            <div class="card-body">
                <form method="POST" action="{{ route('examiner.questions.upload.store') }}" enctype="multipart/form-data">
                    @csrf
                    <div class="form-group">
                        <label>Session <span class="text-danger">*</span></label>
                        <select name="session_id" class="form-control @error('session_id') is-invalid @enderror" required>
                            <option value="">-- Select Session --</option>
                            @foreach($sessions as $s)
                            <option value="{{ $s->id }}" {{ old('session_id') == $s->id ? 'selected' : '' }}>{{ $s->name }}</option>
                            @endforeach
                        </select>
                        @error('session_id')<div class="invalid-feedback">{{ $message }}</div>@enderror
                    </div>
                    <div class="form-group">
                        <label>Excel File (.xlsx / .xls) <span class="text-danger">*</span></label>
                        <input type="file" name="file" class="form-control-file @error('file') is-invalid @enderror"
                               accept=".xlsx,.xls" required>
                        @error('file')<div class="invalid-feedback d-block">{{ $message }}</div>@enderror
                    </div>
                    <button type="submit" class="btn btn-success">
                        <i class="fas fa-upload mr-1"></i> Upload
                    </button>
                    <a href="{{ route('examiner.questions.index') }}" class="btn btn-secondary">Cancel</a>
                </form>
                <a href="#" data-toggle="modal" data-target="#format" class="d-block mt-3 small">View Format?</a>
            </div>
        </div>
    </div>

    <div class="col-md-5">
        <div class="card shadow mb-4">
            <div class="card-header py-3">
                <h6 class="m-0 font-weight-bold text-primary">Excel Format</h6>
            </div>
            <div class="card-body">
                <p class="small">Row 1 is the header (skipped). Each data row = one question.</p>
                <table class="table table-sm table-bordered small">
                    <thead class="thead-light">
                        <tr><th>Col</th><th>Content</th></tr>
                    </thead>
                    <tbody>
                        <tr><td>A</td><td>S/N</td></tr>
                        <tr><td>B</td><td>Question text</td></tr>
                        <tr><td>C</td><td>Correct option</td></tr>
                        <tr><td>D</td><td>Wrong option 1</td></tr>
                        <tr><td>E</td><td>Wrong option 2</td></tr>
                        <tr><td>F</td><td>Wrong option 3</td></tr>
                        <tr><td>G</td><td>Course code (e.g. GSS 101)</td></tr>
                    </tbody>
                </table>
                <p class="small text-muted mb-0">The course code must match an existing subject. Existing questions are updated in-place.</p>
            </div>
        </div>
    </div>
</div>
@endif

{{-- Format modal --}}
<div class="modal fade" id="format" tabindex="-1" role="dialog" aria-hidden="true">
    <div class="modal-dialog modal-lg" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Excel File Format</h5>
                <button type="button" class="close" data-dismiss="modal"><span>&times;</span></button>
            </div>
            <div class="modal-body">
                <table class="table table-bordered">
                    <tr>
                        <th>S/N</th><th>QUESTION</th><th>CORRECT OPTION</th>
                        <th>OPTION 1</th><th>OPTION 2</th><th>OPTION 3</th><th>COURSE CODE</th>
                    </tr>
                    <tr>
                        <td>1</td><td>What is 2 + 2?</td><td>4</td>
                        <td>0</td><td>22</td><td>14</td><td>GSS 101</td>
                    </tr>
                </table>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
            </div>
        </div>
    </div>
</div>
@endsection