@extends('layouts.applicant.applicant')

@section('title', 'D4 - Journal Papers')

@section('breadcrumbs')
    <li class="breadcrumb-item"><a href="{{ route('applicant.applications.index') }}">My Applications</a></li>
    <li class="breadcrumb-item"><a href="{{ route('applicant.applications.show', $application) }}">{{ $application->application_number }}</a></li>
    <li class="breadcrumb-item active">D4 - Journal Papers</li>
@endsection

@section('content')
<div class="container-fluid">
    <!-- Page Header -->
    <div class="d-flex justify-content-between align-items-center mb-4">
        <div>
            <h1 class="h3 mb-0 text-gray-800">Journal Papers (Paid Journal not allowed)</h1>
            <p class="text-muted">Application: {{ $application->application_number }}</p>
        </div>
        <div>
            @php
                $previousStep = $currentStep->getPreviousStep();
            @endphp
            @if($previousStep)
                <a href="{{ route('applicant.applications.step', [$application, $previousStep->slug]) }}" class="btn btn-outline-secondary">
                    <i class="fas fa-arrow-left me-2"></i>Previous Step
                </a>
            @endif
        </div>
    </div>

    <!-- Dynamic Progress Indicator -->
    @include('applicant.applications.partials.progress-indicator')

    @php
        $journalPapers = $application->journalPapers()->orderBy('serial_no')->get();
        $totalCreditPoints = $journalPapers->sum('credit_points');
        $coAuthorCount = $journalPapers->where('role', 'co_author')->count();
        $mainSupervisorCount = $journalPapers->where('role', 'main_supervisor')->count();
        $firstAuthorCount = $journalPapers->where('role', 'first_author')->count();
        $isSkipped = $application->skip_d4_journal_papers ?? false;
    @endphp
    
    <!-- Debug Information (Remove in production) -->
    @if(config('app.debug'))
    <div class="alert alert-info mb-4">
        <h6><i class="fas fa-bug me-2"></i>Debug Information</h6>
        <p><strong>Journal Papers Count:</strong> {{ $journalPapers->count() }}</p>
        <p><strong>Application ID:</strong> {{ $application->id }}</p>
        <p><strong>Is Skipped:</strong> {{ $isSkipped ? 'Yes' : 'No' }}</p>
        <p><strong>Is Editable:</strong> {{ $application->isEditable() ? 'Yes' : 'No' }}</p>
        @if($journalPapers->count() > 0)
            <p><strong>Paper IDs:</strong> {{ $journalPapers->pluck('id')->implode(', ') }}</p>
        @endif
    </div>
    @endif

    <!-- Credit Points Summary -->
    <div class="row mb-4">
        <div class="col-md-12">
            <div class="card border-primary">
                <div class="card-body text-center">
                    <div class="h4 text-primary">{{ number_format($totalCreditPoints, 2) }}</div>
                    <div class="small text-muted">Total Credit Points</div>
                </div>
            </div>
        </div>
    </div>

    <!-- Credit Points Calculation Info -->
    <div class="alert alert-info mb-4">
        <h6 class="alert-heading"><i class="fas fa-info-circle me-2"></i>Credit Points Calculation</h6>
        <div class="row">
            <div class="col-md-4">
                <strong>First Author:</strong>
                <ul class="mb-0 mt-1">
                    <li>Sole Author (0 others): 4 Credit Points</li>
                    <li>With Co-Authors: 2 Credit Points</li>
                </ul>
            </div>
            <div class="col-md-4">
                <strong>Main Supervisor:</strong> 2 Credit Points per paper
            </div>
            <div class="col-md-4">
                <strong>Co-Author:</strong> 2 ÷ Total Other Authors
            </div>
        </div>
        <hr>
        <div class="alert alert-warning mb-0">
            <strong>Important:</strong> 
            <ul class="mb-0">
                <li>Paid journals are not allowed</li>
                <li>Only SCOPUS/SCI indexed journals are accepted</li>
            </ul>
        </div>
    </div>

    <!-- Journal Papers Section -->
    <div class="card shadow mb-4">
        <div class="card-header py-3">
            <div class="d-flex justify-content-between align-items-center">
                <h6 class="m-0 font-weight-bold text-primary">
                    <i class="fas fa-file-alt me-2"></i>Journal Papers
                </h6>
                @if($application->isEditable())
                <button type="button" class="btn btn-primary btn-sm" data-bs-toggle="modal" data-bs-target="#addJournalPaperModal">
                    <i class="fas fa-plus me-1"></i>Add Journal Paper
                </button>
                @endif
            </div>
        </div>
        <div class="card-body">
            @if($journalPapers->count() > 0)
                <div class="table-responsive">
                    <table class="table table-bordered">
                        <thead class="table-light">
                            <tr>
                                <th>Sr. No</th>
                                <th>Author(s) Name/Journal Name (Volume, PP, Year, etc...)</th>
                                <th>Indexed In</th>
                                <th>Role</th>
                                <th>Total No of Other Authors</th>
                                <th>Credit Points</th>
                                <th>First Page Document</th>
                                <th>Added On</th>
                                @if($application->isEditable())
                                <th>Actions</th>
                                @endif
                            </tr>
                        </thead>
                        <tbody>
                            @foreach($journalPapers as $paper)
                            <tr>
                                <td>{{ $paper->serial_no }}</td>
                                <td>
                                    <div class="fw-bold text-dark">{{ $paper->journal_name_details }}</div>
                                    <small class="text-muted">ID: {{ $paper->id }}</small>
                                </td>
                                <td>
                                    <span class="badge badge-{{ $paper->indexed_in === 'sci' ? 'success' : 'info' }}">
                                        {{ $paper->indexed_in_label }}
                                    </span>
                                </td>
                                <td>
                                    @php
                                        $badgeClass = 'secondary';
                                        if ($paper->role === 'co_author') {
                                            $badgeClass = 'primary';
                                        } elseif ($paper->role === 'main_supervisor') {
                                            $badgeClass = 'success';
                                        } elseif ($paper->role === 'first_author') {
                                            $badgeClass = 'info';
                                        }
                                    @endphp
                                    <span class="badge badge-{{ $badgeClass }}">
                                        {{ $paper->role_label }}
                                    </span>
                                </td>
                                <td class="text-center">
                                    <span class="badge badge-light">{{ $paper->total_other_authors }}</span>
                                </td>
                                <td class="fw-bold text-primary text-center">{{ number_format($paper->credit_points, 2) }}</td>
                                <td class="text-center">
                                    @if($paper->hasDocument())
                                        <a href="{{ route('applicant.journal-papers.download-document', [$application, $paper]) }}" 
                                           class="btn btn-sm btn-outline-success" title="Download First Page">
                                            <i class="fas fa-download me-1"></i>Download
                                        </a>
                                    @else
                                        <span class="badge badge-danger">No Document</span>
                                    @endif
                                </td>
                                <td class="text-center">
                                    <small class="text-muted">{{ $paper->created_at->format('M d, Y') }}</small>
                                </td>
                                @if($application->isEditable())
                                <td>
                                    <div class="btn-group" role="group">
                                        <button type="button" class="btn btn-sm btn-outline-primary" 
                                                onclick="editJournalPaper({{ $paper->id }})" title="Edit">
                                            <i class="fas fa-edit"></i>
                                        </button>
                                        <button type="button" class="btn btn-sm btn-outline-danger" 
                                                onclick="deleteJournalPaper({{ $paper->id }})" title="Delete">
                                            <i class="fas fa-trash"></i>
                                        </button>
                                    </div>
                                </td>
                                @endif
                            </tr>
                            @endforeach
                        </tbody>
                    </table>
                </div>
                
                <!-- Summary -->
                <div class="mt-4">
                    <div class="row">
                        <div class="col-md-6">
                            <div class="card border-info">
                                <div class="card-body">
                                    <h6 class="card-title text-info">Summary</h6>
                                    <p class="mb-1"><strong>Total Papers:</strong> {{ $journalPapers->count() }}</p>
                                    <p class="mb-1"><strong>Co-Author:</strong> {{ $coAuthorCount }} papers</p>
                                    <p class="mb-1"><strong>Main Supervisor:</strong> {{ $mainSupervisorCount }} papers</p>
                                    <p class="mb-1"><strong>First Author:</strong> {{ $firstAuthorCount }} papers</p>
                                    <p class="mb-0"><strong>Total Credit Points:</strong> {{ number_format($totalCreditPoints, 2) }}</p>
                                </div>
                            </div>
                        </div>
                        <div class="col-md-6">
                                <div class="card border-secondary">
                                    <div class="card-body">
                                        <h6 class="card-title text-secondary">Breakdown</h6>
                                        @php
                                            $scopusCount = $journalPapers->where('indexed_in', 'scopus')->count();
                                            $sciCount = $journalPapers->where('indexed_in', 'sci')->count();
                                            $withDocuments = $journalPapers->filter(function($paper) { return $paper->hasDocument(); })->count();
                                        @endphp
                                        <p class="mb-1"><strong>SCOPUS Indexed:</strong> {{ $scopusCount }}</p>
                                        <p class="mb-1"><strong>SCI Indexed:</strong> {{ $sciCount }}</p>
                                        <p class="mb-1"><strong>With Documents:</strong> {{ $withDocuments }} / {{ $journalPapers->count() }}</p>
                                        <p class="mb-0"><strong>Last Updated:</strong> {{ $journalPapers->max('updated_at') ? $journalPapers->max('updated_at')->format('M d, Y H:i') : 'N/A' }}</p>
                                    </div>
                                </div>
                    </div>
                </div>
            @else
                <div class="text-center py-5">
                    <i class="fas fa-file-alt fa-4x text-muted mb-3"></i>
                    <h5 class="text-muted">No Journal Papers Added</h5>
                    <p class="text-muted">Add your published journal papers to earn credit points.</p>
                    @if($application->isEditable())
                        <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addJournalPaperModal">
                            <i class="fas fa-plus me-2"></i>Add First Journal Paper
                        </button>
                    @endif
                </div>
            @endif
        </div>
    </div>

    <!-- Navigation -->
    <div class="d-flex justify-content-between mt-4">
        <div>
            @if($previousStep)
                <a href="{{ route('applicant.applications.step', [$application, $previousStep->slug]) }}" class="btn btn-secondary">
                    <i class="fas fa-arrow-left me-1"></i>Previous: {{ $previousStep->name }}
                </a>
            @endif
        </div>
        
        <div>
            @php
                $nextStep = $currentStep->getNextStep();
            @endphp
            @if($nextStep)
                <a href="{{ route('applicant.applications.step', [$application, $nextStep->slug]) }}" class="btn btn-primary">
                    Next: {{ $nextStep->name }} <i class="fas fa-arrow-right ms-1"></i>
                </a>
            @endif
        </div>
    </div>
</div>

<!-- Add/Edit Journal Paper Modal -->
@if($application->isEditable())
<div class="modal fade" id="addJournalPaperModal" tabindex="-1" aria-labelledby="addJournalPaperModalLabel" aria-hidden="true">
    <div class="modal-dialog modal-xl">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="addJournalPaperModalLabel">Add Journal Paper</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <form id="journalPaperForm" method="POST" enctype="multipart/form-data">
                @csrf
                <div class="modal-body">
                    <input type="hidden" id="journal_paper_id" name="journal_paper_id">
                    
                    <div class="mb-3">
                        <label for="journal_name_details" class="form-label">Author(s) Name/Journal Name (Volume, PP, Year, etc...) <span class="text-danger">*</span></label>
                        <textarea class="form-control" id="journal_name_details" name="journal_name_details" rows="3" required 
                                  placeholder="e.g., Author(s) Name: Rajesh Kumar, Priya Sharma, Amit Singh, etc. / Journal of Computer Science, Vol. 15, Issue 3, pp. 123-145, 2023"></textarea>
                        <small class="text-muted">Include author names and complete journal details: Author(s) Name / Journal Name, Volume, Issue, Pages, Year, etc.</small>
                    </div>
                    
                    <div class="row">
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label for="indexed_in" class="form-label">Indexed In <span class="text-danger">*</span></label>
                                <select class="form-select" id="indexed_in" name="indexed_in" required>
                                    <option value="">Select Index</option>
                                    <option value="scopus">SCOPUS</option>
                                    <option value="sci">SCI</option>
                                </select>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label for="role" class="form-label">Role <span class="text-danger">*</span></label>
                                <select class="form-select" id="role" name="role" required onchange="calculateCreditPoints()">
                                    <option value="">Select Role</option>
                                    <option value="first_author">First Author</option>
                                    <option value="co_author">Co-Author</option>
                                    <option value="main_supervisor">Main Supervisor</option>
                                </select>
                            </div>
                        </div>
                    </div>
                    
                    <div class="row">
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label for="total_other_authors" class="form-label">Total No of Other Authors</label>
                                <input type="number" class="form-control" id="total_other_authors" name="total_other_authors" min="0" value="0" onchange="calculateCreditPoints()" oninput="calculateCreditPoints()">
                                <small class="text-muted">Number of co-authors (excluding yourself)</small>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label class="form-label">Credit Points (Auto-calculated)</label>
                                <div class="input-group">
                                    <input type="number" class="form-control" id="credit_points_display" readonly>
                                    <span class="input-group-text">
                                        <i class="fas fa-calculator"></i>
                                    </span>
                                </div>
                                <small class="text-muted" id="credit_points_info">
                                    Credit points will be calculated automatically based on role
                                </small>
                            </div>
                        </div>
                    </div>
                    
                    <div class="mb-3">
                        <label for="first_page_document" class="form-label">Upload First Page of Paper (PDF) <span class="text-danger">*</span></label>
                        <input type="file" class="form-control" id="first_page_document" name="first_page_document" accept=".pdf">
                        <small class="text-muted">Upload the first page of the published paper (PDF only, max 5MB)</small>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                    <button type="submit" class="btn btn-primary">Save Journal Paper</button>
                </div>
            </form>
        </div>
    </div>
</div>
@endif

<script>
function calculateCreditPoints() {
    const role = document.getElementById('role').value;
    const totalOtherAuthors = parseInt(document.getElementById('total_other_authors').value) || 0;
    let creditPoints = 0;
    let info = 'Credit points will be calculated automatically based on role and other authors';
    
    if (role === 'first_author') {
        if (totalOtherAuthors == 0) {
            creditPoints = 4.0;
            info = 'First Author (Sole Author): 4 Credit Points';
        } else {
            creditPoints = 2.0;
            info = `First Author with ${totalOtherAuthors} Co-Authors: 2 Credit Points`;
        }
    } else if (role === 'main_supervisor') {
        creditPoints = 2.0;
        info = 'Main Supervisor: 2 Credit Points';
    } else if (role === 'co_author') {
        if (totalOtherAuthors == 0) {
            creditPoints = 2.0;
            info = 'Co-Author with 0 Other Authors: 2 Credit Points';
        } else {
            creditPoints = Math.round((2.0 / totalOtherAuthors) * 100) / 100;
            info = `Co-Author: 2 ÷ ${totalOtherAuthors} Other Authors = ${creditPoints.toFixed(2)} Credit Points`;
        }
    }
    
    document.getElementById('credit_points_display').value = creditPoints.toFixed(2);
    document.getElementById('credit_points_info').innerHTML = info;
    document.getElementById('credit_points_info').className = creditPoints > 0 ? 'text-success' : 'text-muted';
}

function editJournalPaper(paperId) {
    // Fetch paper data and populate modal
    fetch(`{{ route("applicant.journal-papers.show", [$application, "PAPER_ID"]) }}`.replace('PAPER_ID', paperId))
        .then(response => response.json())
        .then(data => {
            document.getElementById('journal_paper_id').value = data.id;
            document.getElementById('journal_name_details').value = data.journal_name_details;
            document.getElementById('indexed_in').value = data.indexed_in;
            document.getElementById('role').value = data.role;
            document.getElementById('total_other_authors').value = data.total_other_authors;
            
            calculateCreditPoints();
            
            document.getElementById('addJournalPaperModalLabel').textContent = 'Edit Journal Paper';
            document.getElementById('journalPaperForm').action = 
                `{{ route("applicant.journal-papers.update", [$application, "PAPER_ID"]) }}`.replace('PAPER_ID', paperId);
            
            // Show modal
            new bootstrap.Modal(document.getElementById('addJournalPaperModal')).show();
        })
        .catch(error => {
            console.error('Error:', error);
            alert('Error loading paper data');
        });
}

function deleteJournalPaper(paperId) {
    if (confirm('Are you sure you want to delete this journal paper?')) {
        fetch(`{{ route("applicant.journal-papers.destroy", [$application, "PAPER_ID"]) }}`.replace('PAPER_ID', paperId), {
            method: 'DELETE',
            headers: {
                'X-CSRF-TOKEN': '{{ csrf_token() }}',
                'Content-Type': 'application/json',
            },
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                location.reload();
            } else {
                alert('Error deleting journal paper');
            }
        })
        .catch(error => {
            console.error('Error:', error);
            alert('Error deleting journal paper');
        });
    }
}

// Reset modal when opening for new paper
document.getElementById('addJournalPaperModal').addEventListener('show.bs.modal', function (event) {
    if (!event.relatedTarget || !event.relatedTarget.onclick) {
        // Reset form for new paper
        document.getElementById('journalPaperForm').reset();
        document.getElementById('journal_paper_id').value = '';
        document.getElementById('addJournalPaperModalLabel').textContent = 'Add Journal Paper';
        document.getElementById('journalPaperForm').action = '{{ route("applicant.journal-papers.store", $application) }}';
        document.getElementById('credit_points_display').value = '';
        document.getElementById('credit_points_info').innerHTML = 'Credit points will be calculated automatically based on role';
        document.getElementById('credit_points_info').className = 'text-muted';
    }
});

// Handle form submission
document.getElementById('journalPaperForm').addEventListener('submit', function(e) {
    e.preventDefault();
    
    const formData = new FormData(this);
    const isEdit = document.getElementById('journal_paper_id').value !== '';
    
    if (isEdit) {
        formData.append('_method', 'PUT');
    }
    
    fetch(this.action, {
        method: 'POST',
        body: formData,
        headers: {
            'X-CSRF-TOKEN': '{{ csrf_token() }}',
        },
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            location.reload();
        } else {
            alert('Error saving journal paper: ' + (data.message || 'Unknown error'));
        }
    })
    .catch(error => {
        console.error('Error:', error);
        alert('Error saving journal paper');
    });
});
</script>

<style>
.card {
    border: none;
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
}

.card-header {
    background-color: #f8f9fc;
    border-bottom: 1px solid #e3e6f0;
}

.table th {
    background-color: #f8f9fc;
    border-color: #e3e6f0;
    font-weight: 600;
    color: #5a5c69;
    font-size: 0.875rem;
}

.table td {
    vertical-align: middle;
    font-size: 0.875rem;
}

.btn-group .btn {
    margin-right: 2px;
}

.badge {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
}

.modal-content {
    border: none;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.alert {
    border: none;
    border-radius: 0.5rem;
}

.badge-light {
    background-color: #f8f9fa;
    color: #495057;
    border: 1px solid #dee2e6;
}

.badge-danger {
    background-color: #dc3545;
    color: #fff;
}

.badge-success {
    background-color: #28a745;
    color: #fff;
}

.badge-info {
    background-color: #17a2b8;
    color: #fff;
}

.badge-primary {
    background-color: #007bff;
    color: #fff;
}

.table td {
    vertical-align: middle;
}

.text-dark {
    color: #343a40 !important;
}
</style>
@endsection