@extends('admin.layouts.app')
@section('title','Paper — '.$paper->paper_code)
@section('page-title','Paper Detail')
@section('page-subtitle',$paper->paper_code.' · '.\App\Support\PaperWorkflowStatus::label($paper->workflow_status ?? 'submitted'))
@section('papers-active','active')
@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.papers.index') }}" class="text-success text-decoration-none">← Back to papers</a>
</div>

<div class="row g-4">
    <div class="col-lg-8">
        <div class="cardx p-4 mb-3">
            <div class="d-flex justify-content-between align-items-start flex-wrap gap-2 mb-3">
                <div>
                    <h5 class="mb-1">{{ $paper->title }}</h5>
                    <small class="text-muted">{{ $paper->conference?->name }} · Track: {{ $paper->subTheme?->title ?? 'General' }}</small>
                </div>
                <span class="badge {{ \App\Support\PaperWorkflowStatus::badgeClass($paper->workflow_status ?? 'submitted') }}">
                    {{ \App\Support\PaperWorkflowStatus::label($paper->workflow_status ?? 'submitted') }}
                </span>
            </div>
            <p><strong>Paper ID:</strong> {{ $paper->paper_code }}</p>
            <p><strong>Author:</strong> {{ $paper->corresponding_author_name }} ({{ $paper->corresponding_author_email }})</p>
            <p><strong>Submitted:</strong> {{ $paper->submitted_at?->format('M d, Y H:i') }}</p>
            <p><strong>Review mode:</strong> {{ $reviewMode === 'double_blind' ? 'Double-blind' : 'Single review' }}</p>
            @if($paper->paper_file)
                <a href="{{ asset('storage/'.$paper->paper_file) }}" target="_blank" class="btn btn-sm btn-outline-secondary">Original manuscript</a>
            @endif
            @if($paper->anonymized_file_path)
                <a href="{{ asset('storage/'.$paper->anonymized_file_path) }}" target="_blank" class="btn btn-sm btn-outline-secondary">Anonymized PDF</a>
            @endif
            @if(! $paper->isLegacyImport())
                <a href="{{ route('admin.papers.authors.edit', $paper) }}" class="btn btn-sm btn-outline-green">Edit authors</a>
            @endif
        </div>

        @if($paper->usesWorkflow() && in_array($paper->workflow_status, ['submitted', 'desk_review'], true))
            <div class="cardx p-4 mb-3">
                <h6>Desk Review (Stage 2)</h6>
                <p class="text-muted small">Check formatting, scope, and relevance. For double-blind mode, upload an anonymized PDF before passing.</p>
                @if($paper->workflow_status === 'submitted')
                    <form method="POST" action="{{ route('admin.papers.desk-review.begin', $paper) }}" class="d-inline">
                        @csrf
                        <button type="submit" class="btn btn-sm btn-outline-primary">Start desk review</button>
                    </form>
                @endif
                <form method="POST" action="{{ route('admin.papers.desk-review.pass', $paper) }}" enctype="multipart/form-data" class="mt-3">
                    @csrf
                    @if($reviewMode === 'double_blind')
                        <div class="mb-3">
                            <label class="form-label">Anonymized PDF *</label>
                            <input type="file" name="anonymized_file" class="form-control" accept=".pdf" required>
                        </div>
                    @endif
                    <button type="submit" class="btn btn-green">Pass desk review → peer review</button>
                </form>
                <form method="POST" action="{{ route('admin.papers.desk-review.reject', $paper) }}" class="mt-3">
                    @csrf
                    <div class="mb-2">
                        <label class="form-label">Rejection reason *</label>
                        <textarea name="desk_rejection_reason" class="form-control" rows="3" required>{{ old('desk_rejection_reason') }}</textarea>
                    </div>
                    <button type="submit" class="btn btn-outline-danger">Desk reject</button>
                </form>
            </div>
        @endif

        @if($paper->usesWorkflow() && in_array($paper->workflow_status, ['under_review', 'reviewers_assigned', 're_review'], true))
            <div class="cardx p-4 mb-3">
                <h6>Reviewer Assignment (Stage 3)</h6>
                <p class="text-muted small">
                    Assign {{ $paper->conference?->paper_reviewers_per_paper ?? 2 }}–3 reviewers.
                    Target load: max {{ $paper->conference?->paper_reviewer_max_load ?? 5 }} papers per reviewer.
                </p>

                @if($paper->reviewerAssignments->whereNotIn('status', ['declined'])->isNotEmpty())
                    <table class="table table-sm mb-3">
                        <thead><tr><th>Reviewer</th><th>Deadline</th><th>Status</th><th></th></tr></thead>
                        <tbody>
                            @foreach($paper->reviewerAssignments as $ra)
                                <tr>
                                    <td>{{ $ra->reviewer?->name }}</td>
                                    <td>{{ $ra->deadline?->format('M d, Y') ?? '—' }}</td>
                                    <td>{{ ucfirst($ra->status) }}@if($ra->coi_declared) <span class="text-danger">(COI)</span>@endif</td>
                                    <td>
                                        @if($ra->status !== 'submitted')
                                            <form method="POST" action="{{ route('admin.papers.reviewers.destroy', [$paper, $ra]) }}" class="d-inline" onsubmit="return confirm('Remove this assignment?')">
                                                @csrf @method('DELETE')
                                                <button type="submit" class="btn btn-sm btn-outline-danger">Remove</button>
                                            </form>
                                        @endif
                                    </td>
                                </tr>
                            @endforeach
                        </tbody>
                    </table>
                @endif

                @if($eligibleReviewers->isNotEmpty())
                    <form method="POST" action="{{ route('admin.papers.reviewers.store', $paper) }}">
                        @csrf
                        <div class="row g-2">
                            <div class="col-md-6">
                                <label class="form-label">Select reviewer(s)</label>
                                <select name="reviewer_ids[]" class="form-select" multiple size="5" required>
                                    @foreach($eligibleReviewers as $reviewer)
                                        <option value="{{ $reviewer->id }}">
                                            {{ $reviewer->name }} (load: {{ app(\App\Services\PaperReviewerAssignmentService::class)->reviewerLoad($reviewer, $paper->conference_id) }})
                                        </option>
                                    @endforeach
                                </select>
                                <small class="text-muted">Hold Ctrl/Cmd to select multiple.</small>
                            </div>
                            <div class="col-md-4">
                                <label class="form-label">Review deadline</label>
                                <input type="date" name="deadline" class="form-control" min="{{ now()->addDay()->format('Y-m-d') }}">
                            </div>
                            <div class="col-md-2 d-flex align-items-end">
                                <button type="submit" class="btn btn-green w-100">Assign</button>
                            </div>
                        </div>
                    </form>
                @else
                    <p class="text-muted small mb-0">No eligible reviewers available (check reviewer roles, load limits, or conflicts).</p>
                @endif
            </div>
        @endif

        @endif

        @if($paper->reviews->isNotEmpty())
            <div class="cardx p-4 mb-3">
                <h6>Review summary</h6>
                <div class="row g-2 small mb-3">
                    <div class="col-md-3">Reviews: <strong>{{ $reviewSummary['count'] }}</strong></div>
                    @if($reviewSummary['overall_average'])
                        <div class="col-md-3">Avg score: <strong>{{ number_format($reviewSummary['overall_average'], 1) }}/10</strong></div>
                    @endif
                    @foreach($reviewSummary['recommendations'] as $rec => $cnt)
                        <div class="col-md-3">{{ str_replace('_', ' ', ucfirst($rec)) }}: <strong>{{ $cnt }}</strong></div>
                    @endforeach
                </div>
                @foreach($paper->reviews as $review)
                    <div class="border-bottom pb-2 mb-2">
                        <small class="text-muted">Reviewer #{{ $loop->iteration }} · {{ $review->reviewed_at?->format('M d, Y') }}@if($review->is_chair_override) · Chair override@endif</small>
                        <p class="mb-0"><strong>{{ str_replace('_', ' ', ucfirst($review->recommendation)) }}</strong>
                            @if($review->overall_score) · {{ $review->overall_score }}/10 @endif
                        </p>
                        @if($review->comments_to_author)<p class="small mb-0">To author: {{ Str::limit($review->comments_to_author, 200) }}</p>@endif
                        @if($review->comments_to_chair)<p class="small text-muted mb-0">Confidential: {{ Str::limit($review->comments_to_chair, 200) }}</p>@endif
                    </div>
                @endforeach
            </div>
        @endif

        @if($paper->trackRecommendationDecisions->isNotEmpty())
            <div class="cardx p-4 mb-3">
                <h6>Track chair recommendation history</h6>
                <p class="text-muted small">All recommendations are retained across re-review cycles.</p>
                @foreach($paper->trackRecommendationDecisions as $rec)
                    <div class="border-bottom pb-2 mb-2 small">
                        <strong>{{ str_replace('_', ' ', ucfirst($rec->decision)) }}</strong>
                        · {{ $rec->decided_at?->format('M d, Y H:i') }}
                        @if($rec->decider) · {{ $rec->decider->name }} @endif
                        @if($rec->notes)<br><span class="text-muted">{{ $rec->notes }}</span>@endif
                    </div>
                @endforeach
            </div>
        @endif

        @if($paper->workflow_status === 'reviews_complete')
            <div class="cardx p-4 mb-3">
                <h6>Track Chair recommendation (Stage 5)</h6>
                @if($canRecommendTrack)
                    @if($paper->latestTrackRecommendation())
                        <p class="text-muted small mb-2">Latest: <strong>{{ str_replace('_', ' ', ucfirst($paper->latestTrackRecommendation()->decision)) }}</strong> ({{ $paper->latestTrackRecommendation()->decided_at?->format('M d, Y') }})</p>
                    @endif
                    <form method="POST" action="{{ route('admin.papers.track-recommend', $paper) }}">
                        @csrf
                        <div class="row g-2">
                            <div class="col-md-4">
                                <select name="recommendation" class="form-select" required>
                                    <option value="accept">Accept</option>
                                    <option value="minor_correction">Minor revision</option>
                                    <option value="major_correction">Major revision</option>
                                    <option value="reject">Reject</option>
                                </select>
                            </div>
                            <div class="col-md-6">
                                <input type="text" name="notes" class="form-control" placeholder="Notes to program chair (optional)">
                            </div>
                            <div class="col-md-2">
                                <button type="submit" class="btn btn-green w-100">Recommend</button>
                            </div>
                        </div>
                    </form>
                @else
                    <p class="text-muted small mb-0">Only the assigned track chair (or super admin) may submit a recommendation for this paper.</p>
                @endif
            </div>
        @endif

        @if(in_array($paper->workflow_status, ['decision_pending', 'reviews_complete'], true))
            <div class="cardx p-4 mb-3">
                <h6>Program Chair final decision (Stage 6)</h6>
                @php $latestTrack = $paper->latestTrackRecommendation(); @endphp
                @if($latestTrack)
                    <p class="text-muted small">Latest track recommendation: <strong>{{ str_replace('_', ' ', ucfirst($latestTrack->decision)) }}</strong>@if($latestTrack->notes) — {{ $latestTrack->notes }}@endif</p>
                @endif
                @if($canMakeFinalDecision)
                    <form method="POST" action="{{ route('admin.papers.final-decision', $paper) }}">
                        @csrf
                        <div class="mb-2">
                            <select name="decision" class="form-select" required>
                                <option value="accept">Accept</option>
                                <option value="minor_correction">Minor revision required</option>
                                <option value="major_correction">Major revision required</option>
                                <option value="reject">Reject</option>
                            </select>
                        </div>
                        <div class="mb-2">
                            <label class="form-label small">Revision deadline (if minor/major)</label>
                            <input type="date" name="revision_deadline" class="form-control" min="{{ now()->addDay()->format('Y-m-d') }}">
                        </div>
                        <div class="mb-2">
                            <textarea name="notes" class="form-control" rows="2" placeholder="Internal notes (optional)"></textarea>
                        </div>
                        <button type="submit" class="btn btn-green">Record final decision</button>
                        <p class="text-muted small mt-2 mb-0">Author will receive E7–E10 via email queue.</p>
                    </form>
                @else
                    <p class="text-muted small mb-0">Only the assigned program chair (or super admin) may record the final decision.</p>
                @endif
            </div>
        @endif

        @if($paper->decisions->where('decision_type', 'final_decision')->isNotEmpty())
            <div class="cardx p-4 mb-3">
                <h6>Final decision history</h6>
                @foreach($paper->decisions->where('decision_type', 'final_decision')->sortByDesc('decided_at') as $fd)
                    <div class="border-bottom pb-2 mb-2 small">
                        <strong>{{ str_replace('_', ' ', ucfirst($fd->decision)) }}</strong>
                        · {{ $fd->decided_at?->format('M d, Y H:i') }}
                        @if($fd->decider) · {{ $fd->decider->name }} @endif
                        @if($fd->revision_deadline) · Revision by {{ $fd->revision_deadline->format('M d, Y') }} @endif
                        @if($fd->notes)<br><span class="text-muted">{{ $fd->notes }}</span>@endif
                    </div>
                @endforeach
            </div>
        @endif

        @if($paper->workflow_status === 'revision_submitted' && $paper->revised_file)
            <div class="cardx p-4 mb-3">
                <h6>Revision review</h6>
                <a href="{{ asset('storage/'.$paper->revised_file) }}" target="_blank" class="btn btn-sm btn-outline-secondary mb-3">Download revised manuscript</a>
                @php
                    $minorFlow = $paper->decisions->where('decision_type', 'final_decision')->where('decision', 'minor_revision')->isNotEmpty();
                @endphp
                @if($minorFlow && ($canApproveMinorRevision ?? false))
                    <form method="POST" action="{{ route('admin.papers.approve-minor-revision', $paper) }}">
                        @csrf
                        <textarea name="notes" class="form-control mb-2" rows="2" placeholder="Approval notes (optional)"></textarea>
                        <button type="submit" class="btn btn-green">Approve minor revision → Accept</button>
                    </form>
                @elseif($minorFlow)
                    <p class="text-muted small mb-0">Awaiting track chair approval of minor revision.</p>
                @else
                    <p class="text-muted small mb-0">Major revision — awaiting re-review from assigned reviewers.</p>
                @endif
            </div>
        @endif

        @if($paper->revised_file && $paper->camera_ready_approved_at)
            <div class="alert alert-success">Camera-ready manuscript approved {{ $paper->camera_ready_approved_at->format('M d, Y') }}.</div>
        @endif

        @if($paper->workflowEvents->isNotEmpty())
            <div class="cardx p-4">
                <h6>Workflow audit</h6>
                <ul class="list-unstyled mb-0 small">
                    @foreach($paper->workflowEvents as $event)
                        <li class="mb-2">
                            {{ $event->created_at->format('M d, Y H:i') }} —
                            {{ \App\Support\PaperWorkflowStatus::label($event->from_status ?? '—') }}
                            → {{ \App\Support\PaperWorkflowStatus::label($event->to_status) }}
                            @if($event->actor) <span class="text-muted">({{ $event->actor->name }})</span>@endif
                        </li>
                    @endforeach
                </ul>
            </div>
        @endif
    </div>

    <div class="col-lg-4">
        <div class="cardx p-4 mb-3">
            <h6>Quick actions</h6>
            <a href="{{ route('admin.paper-queue.track-recommendations') }}" class="btn btn-sm btn-outline-green w-100 mb-2">Track recommendation queue</a>
            <a href="{{ route('admin.paper-queue.final-decisions') }}" class="btn btn-sm btn-outline-green w-100 mb-2">Final decision queue</a>
            <a href="{{ route('admin.paper-review.index', ['paper_id' => $paper->id]) }}" class="btn btn-sm btn-outline-secondary w-100 mb-2">Chair override review</a>
            <a href="{{ route('admin.paper-notifications.index', ['template_code' => '']) }}" class="btn btn-sm btn-outline-secondary w-100">Notification log</a>
        </div>

        @if($paper->notificationLogs->isNotEmpty())
            <div class="cardx p-4">
                <h6>Recent notifications</h6>
                @foreach($paper->notificationLogs->take(5) as $log)
                    <div class="small border-bottom pb-2 mb-2">
                        <strong>{{ $log->template_code }}</strong> — {{ $log->status }}<br>
                        <span class="text-muted">{{ $log->created_at->format('M d, H:i') }}</span>
                    </div>
                @endforeach
            </div>
        @endif
    </div>
</div>

@endsection