@extends('layouts.applicant.applicant')

@section('head')
<meta name="csrf-token" content="{{ csrf_token() }}">
@endsection

@section('title', 'D18 - International Textbook')

@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">D18 - International Textbook</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">Text book Published by International Publisher</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
        $internationalTextbooks = $application->internationalTextbooks()->orderBy('serial_no')->get();
        $totalCreditPoints = $internationalTextbooks->sum('credit_points');
        $evaluationPoints = min($totalCreditPoints, 18); // Max 18 for evaluation
        $totalBooks = $internationalTextbooks->count();
        $recentBooks = $internationalTextbooks->where('year_of_publication', '>=', now()->year - 5)->count();
        $booksByYear = $internationalTextbooks->groupBy('year_of_publication')->map->count();
        $booksByPublisher = $internationalTextbooks->groupBy('publishers')->map->count();
    @endphp

    <!-- No International Textbook Option -->
    <div class="card shadow mb-4">
        <div class="card-header py-3">
            <h6 class="m-0 font-weight-bold text-warning">
                <i class="fas fa-exclamation-triangle me-2"></i>No International Textbook Declaration
            </h6>
        </div>
        <div class="card-body">
            <div class="form-check">
                <input class="form-check-input" type="checkbox" id="no_international_textbook" 
                       {{ $application->no_international_textbook ? 'checked' : '' }}
                       @if(!$application->isEditable()) disabled @endif
                       onchange="toggleNoInternationalTextbook()">
                <label class="form-check-label fw-bold" for="no_international_textbook">
                    I have Not Published Any International Textbooks
                </label>
                <div class="form-text">
                    Check this box if you have not published any textbooks with international publishers.
                    This step is non-mandatory to fill.
                </div>
            </div>
        </div>
    </div>

    @if(!$application->no_international_textbook)
    <!-- Credit Points Summary -->
    <div class="row mb-4">
        <div class="col-md-3">
            <div class="card border-primary">
                <div class="card-body text-center">
                    <div class="h4 text-primary">{{ number_format($totalCreditPoints, 2) }}</div>
                    <div class="small text-muted">Total Credit Points</div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card border-success">
                <div class="card-body text-center">
                    <div class="h4 text-success">{{ number_format($evaluationPoints, 2) }}</div>
                    <div class="small text-muted">Maximum Credit Points (Max 18)</div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card border-info">
                <div class="card-body text-center">
                    <div class="h4 text-info">{{ $totalBooks }}</div>
                    <div class="small text-muted">Total Books</div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card border-secondary">
                <div class="card-body text-center">
                    <div class="h4 text-secondary">{{ $recentBooks }}</div>
                    <div class="small text-muted">Recent (Last 5 Years)</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-6">
                <strong>Credit Points per Book:</strong> 6 Points
            </div>
            <div class="col-md-6">
                <strong>Total Books:</strong> {{ $totalBooks }}
            </div>
        </div>
        <hr>
        <div class="alert alert-warning mb-0">
            <strong>Important:</strong> 
            <ul class="mb-0">
                <li>Maximum 18 credit points can be used for further calculation</li>
                <li>6 credit points per international textbook published</li>
                <li>Only books published by recognized international publishers</li>
                <li>This step is non-mandatory to fill</li>
                <li>Upload proof documents for verification</li>
            </ul>
        </div>
    </div>

    <!-- International Textbook Section -->
    <div class="card shadow mb-4" id="internationalTextbookSection">
        <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-book me-2"></i>International Textbook Details
                </h6>
                @if($application->isEditable())
                <button type="button" class="btn btn-primary btn-sm" data-bs-toggle="modal" data-bs-target="#addInternationalTextbookModal">
                    <i class="fas fa-plus me-1"></i>Add Textbook
                </button>
                @endif
            </div>
        </div>
        <div class="card-body">
            @if($internationalTextbooks->count() > 0)
                <div class="table-responsive">
                    <table class="table table-bordered">
                        <thead class="table-light">
                            <tr>
                                <th>Sr. No</th>
                                <th>Book Title</th>
                                <th>Author(s)</th>
                                <th>Publisher</th>
                                <th>Year</th>
                                <th>ISBN/ISSN</th>
                                <th>Credit Points</th>
                                <th>Proof Document</th>
                                @if($application->isEditable())
                                <th>Actions</th>
                                @endif
                            </tr>
                        </thead>
                        <tbody>
                            @foreach($internationalTextbooks as $textbook)
                            <tr>
                                <td>{{ $textbook->serial_no }}</td>
                                <td class="fw-bold">
                                    <span title="{{ $textbook->title_of_book }}">
                                        {{ $textbook->title_short }}
                                    </span>
                                </td>
                                <td>{{ $textbook->author }}</td>
                                <td>
                                    <span class="badge badge-publisher">
                                        {{ $textbook->publishers }}
                                    </span>
                                </td>
                                <td>
                                    <span class="badge badge-info">
                                        {{ $textbook->year_of_publication }}
                                    </span>
                                    <small class="d-block text-muted">{{ $textbook->book_age }} years ago</small>
                                </td>
                                <td>
                                    <small class="font-monospace">{{ $textbook->isbn_formatted }}</small>
                                </td>
                                <td class="fw-bold text-primary">{{ number_format($textbook->credit_points, 2) }}</td>
                                <td>
                                    @if($textbook->hasDocument())
                                        <a href="{{ route('applicant.international-textbooks.download-document', [$application, $textbook]) }}" 
                                           class="btn btn-sm btn-outline-primary" title="Download Document">
                                            <i class="fas fa-download"></i>
                                        </a>
                                    @else
                                        <span class="text-danger">No Document</span>
                                    @endif
                                </td>
                                @if($application->isEditable())
                                <td>
                                    <div class="btn-group" role="group">
                                        <button type="button" class="btn btn-sm btn-outline-primary" 
                                                onclick="editInternationalTextbook({{ $textbook->id }})" title="Edit">
                                            <i class="fas fa-edit"></i>
                                        </button>
                                        <button type="button" class="btn btn-sm btn-outline-danger" 
                                                onclick="deleteInternationalTextbook({{ $textbook->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">Book Summary</h6>
                                    <p class="mb-1"><strong>Total Books:</strong> {{ $totalBooks }}</p>
                                    <p class="mb-1"><strong>Recent (5 years):</strong> {{ $recentBooks }}</p>
                                    <p class="mb-0"><strong>Total Credit Points:</strong> {{ number_format($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">Evaluation</h6>
                                    <p class="mb-1"><strong>Evaluation Points:</strong> {{ number_format($evaluationPoints, 2) }} / 18</p>
                                    @if($totalCreditPoints > 18)
                                        <p class="mb-0 text-warning"><strong>Note:</strong> Total exceeds 18, capped at 18 for evaluation</p>
                                    @else
                                        <p class="mb-0 text-success"><strong>Status:</strong> Within evaluation limit</p>
                                    @endif
                                </div>
                            </div>
                        </div>
                    </div>
                </div>

                <!-- Year-wise and Publisher Distribution -->
                <div class="mt-4">
                    <div class="row">
                        @if($booksByYear->count() > 0)
                        <div class="col-md-6">
                            <div class="card border-light">
                                <div class="card-body">
                                    <h6 class="card-title text-dark">Year-wise Distribution</h6>
                                    <div class="row">
                                        @foreach($booksByYear->sortKeysDesc()->take(4) as $year => $count)
                                        <div class="col-6 mb-2">
                                            <div class="text-center">
                                                <div class="h6 text-primary">{{ $count }}</div>
                                                <small class="text-muted">{{ $year }}</small>
                                            </div>
                                        </div>
                                        @endforeach
                                    </div>
                                </div>
                            </div>
                        </div>
                        @endif
                        
                        @if($booksByPublisher->count() > 0)
                        <div class="col-md-6">
                            <div class="card border-light">
                                <div class="card-body">
                                    <h6 class="card-title text-dark">Publisher Distribution</h6>
                                    <div class="row">
                                        @foreach($booksByPublisher->sortDesc()->take(4) as $publisher => $count)
                                        <div class="col-12 mb-1">
                                            <div class="d-flex justify-content-between">
                                                <small class="text-muted">{{ Str::limit($publisher, 20) }}</small>
                                                <span class="badge badge-secondary">{{ $count }}</span>
                                            </div>
                                        </div>
                                        @endforeach
                                    </div>
                                </div>
                            </div>
                        </div>
                        @endif
                    </div>
                </div>
            @else
                <div class="text-center py-5">
                    <i class="fas fa-book fa-4x text-muted mb-3"></i>
                    <h5 class="text-muted">No International Textbooks Added</h5>
                    <p class="text-muted">Add your published international textbooks to earn credit points.</p>
                    @if($application->isEditable())
                        <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addInternationalTextbookModal">
                            <i class="fas fa-plus me-2"></i>Add First Textbook
                        </button>
                    @endif
                </div>
            @endif
        </div>
    </div>
    @endif

    <!-- 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 International Textbook Modal -->
@if($application->isEditable())
<div class="modal fade" id="addInternationalTextbookModal" tabindex="-1" aria-labelledby="addInternationalTextbookModalLabel" aria-hidden="true">
    <div class="modal-dialog modal-xl">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="addInternationalTextbookModalLabel">Add International Textbook</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <form id="internationalTextbookForm" method="POST" enctype="multipart/form-data">
                @csrf
                <div class="modal-body">
                    <input type="hidden" id="international_textbook_id" name="international_textbook_id">
                    
                    <div class="mb-3">
                        <label for="title_of_book" class="form-label">Title of Book <span class="text-danger">*</span></label>
                        <textarea class="form-control" id="title_of_book" name="title_of_book" 
                                  rows="2" required placeholder="Enter the complete title of the textbook"></textarea>
                        <small class="text-muted">Enter the full title of the international textbook</small>
                    </div>
                    
                    <div class="row">
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label for="author" class="form-label">Author(s) <span class="text-danger">*</span></label>
                                <input type="text" class="form-control" id="author" name="author" 
                                       required placeholder="Enter author name(s)">
                                <small class="text-muted">Enter all authors (separate multiple authors with commas)</small>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label for="year_of_publication" class="form-label">Year of Publication <span class="text-danger">*</span></label>
                                <input type="number" class="form-control" id="year_of_publication" name="year_of_publication" 
                                       min="1950" max="{{ date('Y') + 1 }}" required onchange="calculateCreditPoints()">
                                <small class="text-muted">Year when the book was published</small>
                            </div>
                        </div>
                    </div>
                    
                    <div class="row">
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label for="publishers" class="form-label">Publisher <span class="text-danger">*</span></label>
                                <select class="form-select" id="publishers" name="publishers" required>
                                    <option value="">Select Publisher</option>
                                    <option value="Springer">Springer</option>
                                    <option value="Elsevier">Elsevier</option>
                                    <option value="Wiley">Wiley</option>
                                    <option value="Taylor & Francis">Taylor & Francis</option>
                                    <option value="Cambridge University Press">Cambridge University Press</option>
                                    <option value="Oxford University Press">Oxford University Press</option>
                                    <option value="MIT Press">MIT Press</option>
                                    <option value="Academic Press">Academic Press</option>
                                    <option value="CRC Press">CRC Press</option>
                                    <option value="IEEE Press">IEEE Press</option>
                                    <option value="McGraw-Hill">McGraw-Hill</option>
                                    <option value="Pearson">Pearson</option>
                                    <option value="Cengage Learning">Cengage Learning</option>
                                    <option value="Sage Publications">Sage Publications</option>
                                    <option value="World Scientific">World Scientific</option>
                                    <option value="Other International Publisher">Other International Publisher</option>
                                </select>
                                <small class="text-muted">Select the international publisher</small>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label for="isbn_issn_no" class="form-label">ISBN/ISSN Number <span class="text-danger">*</span></label>
                                <input type="text" class="form-control" id="isbn_issn_no" name="isbn_issn_no" 
                                       required placeholder="Enter ISBN or ISSN number">
                                <small class="text-muted">Enter the ISBN or ISSN number of the book</small>
                            </div>
                        </div>
                    </div>
                    
                    <div class="row">
                        <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 value="6">
                                    <span class="input-group-text">
                                        <i class="fas fa-star"></i>
                                    </span>
                                </div>
                                <small class="text-success" id="credit_points_info">
                                    6 credit points per international textbook
                                </small>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label class="form-label">Book Age (Auto-calculated)</label>
                                <div class="input-group">
                                    <input type="text" class="form-control" id="book_age_display" readonly>
                                    <span class="input-group-text">
                                        <i class="fas fa-calendar"></i>
                                    </span>
                                </div>
                                <small class="text-muted" id="book_age_info">
                                    Years since publication
                                </small>
                            </div>
                        </div>
                    </div>
                    
                    <div class="mb-3">
                        <label for="proof_document" class="form-label">Upload Proof Document (PDF) <span class="text-danger">*</span></label>
                        <input type="file" class="form-control" id="proof_document" name="proof_document" accept=".pdf">
                        <small class="text-muted">Upload publication proof or relevant document (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 Textbook</button>
                </div>
            </form>
        </div>
    </div>
</div>
@endif

<script>
function toggleNoInternationalTextbook() {
    const checkbox = document.getElementById('no_international_textbook');
    const internationalTextbookSection = document.getElementById('internationalTextbookSection');
    
    if (checkbox.checked) {
        internationalTextbookSection.style.display = 'none';
        updateNoInternationalTextbookStatus(true);
    } else {
        internationalTextbookSection.style.display = 'block';
        updateNoInternationalTextbookStatus(false);
    }
}

function updateNoInternationalTextbookStatus(noInternationalTextbook) {
    fetch(`{{ route("applicant.applications.update-no-international-textbook", $application) }}`, {
        method: 'POST',
        headers: {
            'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content'),
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            no_international_textbook: noInternationalTextbook
        })
    })
    .then(response => response.json())
    .then(data => {
        if (!data.success) {
            console.error('Error updating no international textbook status');
        }
    })
    .catch(error => {
        console.error('Error:', error);
    });
}

function calculateCreditPoints() {
    const year = parseInt(document.getElementById('year_of_publication').value) || 0;
    const currentYear = new Date().getFullYear();
    
    // Always 6 points per textbook
    document.getElementById('credit_points_display').value = '6';
    
    if (year) {
        const age = currentYear - year;
        document.getElementById('book_age_display').value = age + ' years ago';
        document.getElementById('book_age_info').innerHTML = `Published ${age} years ago`;
        document.getElementById('book_age_info').className = 'text-success';
    } else {
        document.getElementById('book_age_display').value = '';
        document.getElementById('book_age_info').innerHTML = 'Years since publication';
        document.getElementById('book_age_info').className = 'text-muted';
    }
}

function editInternationalTextbook(textbookId) {
    // Fetch textbook data and populate modal
    fetch(`{{ route("applicant.international-textbooks.show", [$application, "TEXTBOOK_ID"]) }}`.replace('TEXTBOOK_ID', textbookId), {
        headers: {
            'Accept': 'application/json',
            'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content')
        }
    })
    .then(response => response.json())
    .then(data => {
        document.getElementById('international_textbook_id').value = data.id;
        document.getElementById('title_of_book').value = data.title_of_book;
        document.getElementById('author').value = data.author;
        document.getElementById('year_of_publication').value = data.year_of_publication;
        document.getElementById('publishers').value = data.publishers;
        document.getElementById('isbn_issn_no').value = data.isbn_issn_no;
        
        calculateCreditPoints();
        
        document.getElementById('addInternationalTextbookModalLabel').textContent = 'Edit International Textbook';
        document.getElementById('proof_document').required = false; // Not required for edit
        
        // Show modal
        new bootstrap.Modal(document.getElementById('addInternationalTextbookModal')).show();
    })
    .catch(error => {
        console.error('Error:', error);
        alert('Error loading textbook data');
    });
}

function deleteInternationalTextbook(textbookId) {
    if (confirm('Are you sure you want to delete this international textbook record?')) {
        fetch(`{{ route("applicant.international-textbooks.destroy", [$application, "TEXTBOOK_ID"]) }}`.replace('TEXTBOOK_ID', textbookId), {
            method: 'DELETE',
            headers: {
                'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content'),
            },
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                location.reload();
            } else {
                alert('Error deleting international textbook record');
            }
        })
        .catch(error => {
            console.error('Error:', error);
            alert('Error deleting international textbook record');
        });
    }
}

// Reset modal when opening for new textbook
document.querySelector('[data-bs-target="#addInternationalTextbookModal"]').addEventListener('click', function() {
    document.getElementById('internationalTextbookForm').reset();
    document.getElementById('international_textbook_id').value = '';
    document.getElementById('addInternationalTextbookModalLabel').textContent = 'Add International Textbook';
    document.getElementById('proof_document').required = true;
    document.getElementById('credit_points_display').value = '6';
    document.getElementById('book_age_display').value = '';
    document.getElementById('credit_points_info').innerHTML = '6 credit points per international textbook';
    document.getElementById('credit_points_info').className = 'text-success';
    document.getElementById('book_age_info').innerHTML = 'Years since publication';
    document.getElementById('book_age_info').className = 'text-muted';
});

// Handle form submission
document.getElementById('internationalTextbookForm').addEventListener('submit', function(e) {
    e.preventDefault();
    
    const formData = new FormData(this);
    const textbookId = document.getElementById('international_textbook_id').value;
    
    // Determine if this is an update or create
    const url = textbookId ? 
        `{{ route('applicant.international-textbooks.update', [$application, '__TEXTBOOK_ID__']) }}`.replace('__TEXTBOOK_ID__', textbookId) :
        `{{ route('applicant.international-textbooks.store', $application) }}`;
    
    if (textbookId) {
        formData.append('_method', 'PUT');
    }
    
    fetch(url, {
        method: 'POST',
        body: formData,
        headers: {
            'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content')
        }
    })
    .then(response => {
        if (response.ok) {
            location.reload();
        } else {
            return response.json().then(data => {
                throw new Error(data.message || 'An error occurred');
            });
        }
    })
    .catch(error => {
        alert('Error: ' + error.message);
        console.error('Error:', error);
    });
});

// Initialize page state
document.addEventListener('DOMContentLoaded', function() {
    const checkbox = document.getElementById('no_international_textbook');
    const internationalTextbookSection = document.getElementById('internationalTextbookSection');
    
    if (checkbox.checked) {
        internationalTextbookSection.style.display = 'none';
    } else {
        internationalTextbookSection.style.display = 'block';
    }
});
</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;
}

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

.badge-publisher {
    background-color: #6f42c1;
    color: white;
}

.badge-secondary {
    background-color: #6c757d;
    color: white;
}

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

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

.form-check-input:checked {
    background-color: #ffc107;
    border-color: #ffc107;
}

.font-monospace {
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
}
</style>
@endsection