@extends('admin.layouts.app')
@section('title','Paper Roles — '.$conference->name)
@section('page-title','Conference Paper Roles')
@section('page-subtitle',$conference->name)
@section('content')

@if(session('success'))<div class="alert alert-success">{{ session('success') }}</div>@endif
@if($errors->any())<div class="alert alert-danger"><ul class="mb-0">@foreach($errors->all() as $e)<li>{{ $e }}</li>@endforeach</ul></div>@endif

<div class="mb-3">
    <a href="{{ route('admin.conferences.edit', $conference) }}" class="text-success text-decoration-none">← Edit conference</a>
</div>

<div class="row g-4">
    <div class="col-lg-5">
        <div class="cardx p-4">
            <h6>Assign role</h6>
            <p class="text-muted small">Track chairs may be scoped to a sub-theme (track). Program chairs oversee final decisions for the conference.</p>
            <form method="POST" action="{{ route('admin.conferences.paper-roles.store', $conference) }}">
                @csrf
                <div class="mb-3">
                    <label class="form-label">User</label>
                    <select name="user_id" class="form-select" required>
                        <option value="">Select user</option>
                        @foreach($users as $user)
                            <option value="{{ $user->id }}">{{ $user->name }} ({{ $user->email }})</option>
                        @endforeach
                    </select>
                </div>
                <div class="mb-3">
                    <label class="form-label">Role</label>
                    <select name="role" class="form-select" id="paperRoleSelect" required>
                        <option value="track_chair">Track Chair</option>
                        <option value="program_chair">Program Chair</option>
                    </select>
                </div>
                <div class="mb-3" id="trackSelectWrap">
                    <label class="form-label">Track (sub-theme)</label>
                    <select name="sub_theme_id" class="form-select">
                        <option value="">All tracks</option>
                        @foreach($conference->subThemes as $theme)
                            <option value="{{ $theme->id }}">{{ $theme->title }}</option>
                        @endforeach
                    </select>
                </div>
                <button type="submit" class="btn btn-green">Assign</button>
            </form>
        </div>
    </div>
    <div class="col-lg-7">
        <div class="cardx p-4">
            <h6>Current assignments</h6>
            <div class="table-responsive">
                <table class="table table-sm">
                    <thead><tr><th>User</th><th>Role</th><th>Track</th><th></th></tr></thead>
                    <tbody>
                        @forelse($conference->paperRoleAssignments as $assignment)
                            <tr>
                                <td>{{ $assignment->user?->name }}<br><small class="text-muted">{{ $assignment->user?->email }}</small></td>
                                <td>{{ $assignment->role === 'track_chair' ? 'Track Chair' : 'Program Chair' }}</td>
                                <td>{{ $assignment->subTheme?->title ?? 'All' }}</td>
                                <td>
                                    <form method="POST" action="{{ route('admin.conferences.paper-roles.destroy', [$conference, $assignment]) }}" onsubmit="return confirm('Remove?')">
                                        @csrf @method('DELETE')
                                        <button type="submit" class="btn btn-sm btn-outline-danger">Remove</button>
                                    </form>
                                </td>
                            </tr>
                        @empty
                            <tr><td colspan="4" class="text-muted">No paper role assignments yet.</td></tr>
                        @endforelse
                    </tbody>
                </table>
            </div>
        </div>
    </div>
</div>

@push('scripts')
<script>
(function () {
    const roleSelect = document.getElementById('paperRoleSelect');
    const trackWrap = document.getElementById('trackSelectWrap');
    function toggleTrack() {
        if (!roleSelect || !trackWrap) return;
        trackWrap.style.display = roleSelect.value === 'program_chair' ? 'none' : '';
    }
    roleSelect?.addEventListener('change', toggleTrack);
    toggleTrack();
})();
</script>
@endpush

@endsection