{% extends "base.html" %}

{% block content %}
<div class="container-fluid mt-5">
    <div class="row mb-4">
        <div class="col-12">
            <h2 class="mb-3">
                <i class="fas fa-cube me-2"></i>Manage Boxes
            </h2>
        </div>
    </div>

    {% if message %}
    <div class="alert alert-{{ message_type }} alert-dismissible fade show" role="alert">
        {{ message }}
        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
    </div>
    {% endif %}

    <div class="row">
        <!-- Left Panel: Add Box Form -->
        <div class="col-md-3">
            <div class="card shadow-sm">
                <div class="card-header bg-primary text-white">
                    <h5 class="mb-0">
                        <i class="fas fa-plus me-2"></i>Create New Box
                    </h5>
                </div>
                <div class="card-body">
                    <form method="POST" id="addBoxForm">
                        <input type="hidden" name="action" value="add_box">
                        
                        <button type="submit" class="btn btn-primary w-100" name="add_box" value="1">
                            <i class="fas fa-plus me-2"></i>Create Box
                        </button>
                    </form>
                </div>
            </div>

            <!-- Statistics Card -->
            <div class="card shadow-sm mt-3">
                <div class="card-header bg-info text-white">
                    <h5 class="mb-0">
                        <i class="fas fa-chart-bar me-2"></i>Statistics
                    </h5>
                </div>
                <div class="card-body">
                    <div class="mb-3">
                        <small class="text-muted d-block">Total Boxes</small>
                        <h4 class="text-primary mb-0">{{ stats.total }}</h4>
                    </div>
                    <div class="mb-3">
                        <small class="text-muted d-block">Open</small>
                        <h5 class="text-success mb-0">{{ stats.open }}</h5>
                    </div>
                    <div>
                        <small class="text-muted d-block">Closed</small>
                        <h5 class="text-danger mb-0">{{ stats.closed }}</h5>
                    </div>
                </div>
            </div>

            <!-- Delete Multiple Button -->
            <div class="card shadow-sm mt-3 border-warning">
                <div class="card-header bg-warning">
                    <h5 class="mb-0">
                        <i class="fas fa-trash me-2"></i>Delete Selected
                    </h5>
                </div>
                <div class="card-body">
                    <form method="POST" id="deleteForm">
                        <input type="hidden" name="action" value="delete_multiple">
                        <button type="button" class="btn btn-danger w-100" id="deleteSelectedBtn" 
                                onclick="deleteSelectedBoxes()">
                            <i class="fas fa-trash me-2"></i>Delete Selected
                        </button>
                        <input type="hidden" id="delete_ids" name="delete_ids" value="">
                    </form>
                    <small class="text-muted d-block mt-2">Select boxes in table to delete</small>
                </div>
            </div>
        </div>

        <!-- Center Panel: Boxes Table -->
        <div class="col-md-6">
            <div class="card shadow-sm">
                <div class="card-header bg-info text-white">
                    <h5 class="mb-0">
                        <i class="fas fa-list me-2"></i>All Boxes ({{ boxes|length }})
                    </h5>
                </div>
                <div class="card-body" style="max-height: 600px; overflow-y: auto;">
                    {% if boxes %}
                    <div class="table-responsive">
                        <table class="table table-striped table-hover" id="boxesTable">
                            <thead class="table-light sticky-top">
                                <tr>
                                    <th width="30">
                                        <input type="checkbox" id="selectAll" onchange="toggleSelectAll(this)">
                                    </th>
                                    <th>Box Number</th>
                                    <th>Status</th>
                                    <th>Location</th>
                                    <th>Action</th>
                                </tr>
                            </thead>
                            <tbody>
                                {% for box in boxes %}
                                <tr class="box-row" data-box-id="{{ box.id }}" data-box-number="{{ box.box_number }}" 
                                    data-box-status="{{ box.status }}" data-location-id="{{ box.location_id or '' }}">
                                    <td>
                                        <input type="checkbox" class="box-checkbox" 
                                               value="{{ box.id }}" 
                                               onchange="updateDeleteBtn()">
                                    </td>
                                    <td>
                                        <strong>{{ box.box_number }}</strong>
                                    </td>
                                    <td>
                                        <span class="badge bg-{{ 'success' if box.status == 'open' else 'danger' }}">
                                            {{ box.status|upper }}
                                        </span>
                                    </td>
                                    <td>{{ box.location_code or '-' }}</td>
                                    <td>
                                        <button type="button" class="btn btn-sm btn-outline-primary" 
                                                onclick="editBox({{ box.id }}, event)">
                                            <i class="fas fa-edit"></i>
                                        </button>
                                    </td>
                                </tr>
                                {% endfor %}
                            </tbody>
                        </table>
                    </div>
                    {% else %}
                    <div class="alert alert-info text-center" role="alert">
                        <i class="fas fa-info-circle me-2"></i>
                        No boxes found. Create one using the form on the left.
                    </div>
                    {% endif %}
                </div>
            </div>
        </div>

        <!-- Right Panel: Edit/Print -->
        <div class="col-md-3">
            <div class="card shadow-sm">
                <div class="card-header bg-success text-white">
                    <h5 class="mb-0">
                        <i class="fas fa-edit me-2"></i>Edit Box
                    </h5>
                </div>
                <div class="card-body">
                    <div id="editSection" style="display: none;">
                        <form method="POST" id="editBoxForm">
                            <input type="hidden" name="action" value="edit_box">
                            <input type="hidden" id="edit_box_id" name="box_id">
                            
                            <div class="mb-3">
                                <label class="form-label">Box Number</label>
                                <input type="text" class="form-control" id="edit_box_number" 
                                       placeholder="Box number" readonly>
                                <small class="text-muted">Cannot be changed</small>
                            </div>

                            <div class="mb-3">
                                <label for="edit_status" class="form-label">Status</label>
                                <select class="form-select" id="edit_status" name="status">
                                    <option value="open">Open</option>
                                    <option value="closed">Closed</option>
                                </select>
                            </div>

                            <div class="mb-3">
                                <label for="edit_location" class="form-label">Location</label>
                                <select class="form-select" id="edit_location" name="location_id">
                                    <option value="">No Location</option>
                                    {% for location in locations %}
                                    <option value="{{ location.id }}">{{ location.location_code }}</option>
                                    {% endfor %}
                                </select>
                            </div>

                            <button type="button" class="btn btn-success w-100 mb-2" 
                                    onclick="saveEditBox()">
                                <i class="fas fa-save me-2"></i>Save Changes
                            </button>
                            <button type="button" class="btn btn-danger w-100 mb-2" 
                                    onclick="deleteBoxConfirm()">
                                <i class="fas fa-trash me-2"></i>Delete Box
                            </button>
                            <button type="button" class="btn btn-secondary w-100" 
                                    onclick="cancelEdit()">
                                Cancel
                            </button>
                        </form>
                    </div>

                    <div id="noEditSection" class="alert alert-info text-center">
                        <i class="fas fa-arrow-left me-2"></i>
                        Click edit button in table to modify a box
                    </div>
                </div>
            </div>

            <!-- Barcode Print Section -->
            <div class="card shadow-sm mt-3">
                <div class="card-header bg-secondary text-white">
                    <h5 class="mb-0">
                        <i class="fas fa-barcode me-2"></i>Print Label
                    </h5>
                </div>
                <div class="card-body">
                    <div id="printSection" style="display: none;">
                        <div class="mb-3">
                            <label class="form-label">Box Number:</label>
                            <p id="print_box_number" class="fw-bold mb-0" style="font-size: 1.2rem; color: #0d6efd;">-</p>
                        </div>
                        
                        <!-- Printer Selection -->
                        <div class="mb-3">
                            <label for="printer-select" class="form-label">Select Printer:</label>
                            <select id="printer-select" class="form-select form-select-sm" style="font-size: 0.95rem;">
                                <option value="">Default Printer</option>
                            </select>
                            <small class="text-muted d-block mt-1">
                                <i class="fas fa-info-circle me-1"></i>
                                <span id="qz-status">QZ Tray: Initializing...</span>
                            </small>
                        </div>
                        
                        <!-- Barcode Preview -->
                        <div id="barcodePreviewContainer" style="display: none; text-align: center; margin: 20px 0; padding: 15px; background-color: #f8f9fa; border-radius: 4px;">
                            <svg id="boxBarcode" style="max-width: 100%; height: auto;"></svg>
                            <p class="text-muted small mt-2 mb-0">Scan this barcode to identify the box</p>
                        </div>
                        
                        <button type="button" class="btn btn-primary w-100 mb-2" 
                                onclick="generateBarcodePreview()">
                            <i class="fas fa-eye me-2"></i>Generate Preview
                        </button>
                        <button type="button" class="btn btn-success w-100 mb-2" 
                                id="printBoxBtn" style="display: none;" onclick="printBarcode()">
                            <i class="fas fa-print me-2"></i>Print Label
                        </button>
                        <button type="button" class="btn btn-info btn-sm w-100 mb-2" 
                                onclick="testQZTrayConnection()">
                            <i class="fas fa-cog me-2"></i>Test QZ Tray
                        </button>
                        <small class="text-muted d-block">
                            <i class="fas fa-info-circle me-1"></i>
                            Requires QZ Tray installed for thermal printing
                        </small>
                    </div>

                    <div id="noPrintSection" class="alert alert-info text-center">
                        <i class="fas fa-arrow-left me-2"></i>
                        Select a box to print
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Delete Confirmation Modal -->
<div class="modal fade" id="deleteConfirmModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header bg-danger text-white">
                <h5 class="modal-title">Confirm Delete</h5>
                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <p id="deleteConfirmMessage">Are you sure you want to delete this box?</p>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                <button type="button" class="btn btn-danger" id="confirmDeleteBtn" 
                        onclick="confirmDelete()">Delete</button>
            </div>
        </div>
    </div>
</div>

<!-- QZ Tray and Barcode Libraries -->
<script src="https://cdn.jsdelivr.net/npm/jsbarcode@3.11.5/dist/JsBarcode.all.min.js"></script>
<script src="{{ url_for('static', filename='js/qz-tray.js') }}"></script>
<script src="{{ url_for('static', filename='js/qz-printer.js') }}"></script>

<script>
// Box editing state
let currentEditingBoxId = null;
let currentDeleteId = null;

// Toggle select all checkboxes
function toggleSelectAll(checkbox) {
    const checkboxes = document.querySelectorAll('.box-checkbox');
    checkboxes.forEach(cb => cb.checked = checkbox.checked);
    updateDeleteBtn();
}

// Update delete button visibility
function updateDeleteBtn() {
    const checkedCount = document.querySelectorAll('.box-checkbox:checked').length;
    const deleteBtn = document.getElementById('deleteSelectedBtn');
    deleteBtn.disabled = checkedCount === 0;
    if (checkedCount > 0) {
        deleteBtn.textContent = `Delete ${checkedCount} Selected`;
    } else {
        deleteBtn.innerHTML = '<i class="fas fa-trash me-2"></i>Delete Selected';
    }
}

// Delete selected boxes
function deleteSelectedBoxes() {
    const selectedIds = Array.from(document.querySelectorAll('.box-checkbox:checked'))
                            .map(cb => cb.value);
    
    if (selectedIds.length === 0) {
        alert('Please select boxes to delete');
        return;
    }

    document.getElementById('deleteConfirmMessage').textContent = 
        `Are you sure you want to delete ${selectedIds.length} box(es)?`;
    currentDeleteId = selectedIds.join(',');
    new bootstrap.Modal(document.getElementById('deleteConfirmModal')).show();
}

// Edit box
function editBox(boxId, evt) {
    try {
        const row = evt.target.closest('tr');
        if (!row) {
            console.error('Could not find table row');
            return;
        }
        
        currentEditingBoxId = boxId;
        const boxNumber = row.dataset.boxNumber;
        const status = row.dataset.boxStatus;
        const locationId = row.dataset.locationId || '';
        
        console.log('Editing box:', {boxId, boxNumber, status, locationId});
        
        // Populate form fields
        const editBoxIdEl = document.getElementById('edit_box_id');
        const editBoxNumberEl = document.getElementById('edit_box_number');
        const editStatusEl = document.getElementById('edit_status');
        const editLocationEl = document.getElementById('edit_location');
        
        if (editBoxIdEl) editBoxIdEl.value = boxId;
        if (editBoxNumberEl) editBoxNumberEl.value = boxNumber;
        if (editStatusEl) editStatusEl.value = status;
        if (editLocationEl) editLocationEl.value = locationId;
        
        // Show/hide sections
        const editSectionEl = document.getElementById('editSection');
        const noEditSectionEl = document.getElementById('noEditSection');
        const printSectionEl = document.getElementById('printSection');
        const noPrintSectionEl = document.getElementById('noPrintSection');
        
        if (editSectionEl) editSectionEl.style.display = 'block';
        if (noEditSectionEl) noEditSectionEl.style.display = 'none';
        if (printSectionEl) printSectionEl.style.display = 'block';
        if (noPrintSectionEl) noPrintSectionEl.style.display = 'none';
        
        // Update print section
        const printBoxNumberEl = document.getElementById('print_box_number');
        if (printBoxNumberEl) printBoxNumberEl.textContent = boxNumber;
        
        // Reset barcode preview
        const barcodeEl = document.getElementById('boxBarcode');
        if (barcodeEl) {
            barcodeEl.innerHTML = '';
        }
        const barcodePreviewEl = document.getElementById('barcodePreviewContainer');
        const printBoxBtnEl = document.getElementById('printBoxBtn');
        if (barcodePreviewEl) barcodePreviewEl.style.display = 'none';
        if (printBoxBtnEl) printBoxBtnEl.style.display = 'none';
        
        // Highlight selected row
        document.querySelectorAll('.box-row').forEach(r => r.style.backgroundColor = '');
        if (row) row.style.backgroundColor = '#e3f2fd';
        
        console.log('Box edit section displayed');
        
    } catch (error) {
        console.error('Error in editBox:', error);
        alert('Error loading box: ' + error.message);
    }
}

// Save edit
function saveEditBox() {
    if (!currentEditingBoxId) return;
    
    const statusEl = document.getElementById('edit_status');
    const locationEl = document.getElementById('edit_location');
    
    const status = statusEl ? statusEl.value : '';
    const location_id = locationEl ? locationEl.value : '';
    
    const form2 = document.createElement('form');
    form2.method = 'POST';
    form2.innerHTML = `
        <input type="hidden" name="action" value="edit_box">
        <input type="hidden" name="box_id" value="${currentEditingBoxId}">
        <input type="hidden" name="status" value="${status}">
        <input type="hidden" name="location_id" value="${location_id}">
    `;
    document.body.appendChild(form2);
    form2.submit();
}

// Delete box confirmation
function deleteBoxConfirm() {
    if (!currentEditingBoxId) return;
    
    document.getElementById('deleteConfirmMessage').textContent = 
        'Are you sure you want to delete this box?';
    currentDeleteId = currentEditingBoxId;
    new bootstrap.Modal(document.getElementById('deleteConfirmModal')).show();
}

// Confirm delete
function confirmDelete() {
    const form = document.createElement('form');
    form.method = 'POST';
    form.innerHTML = `
        <input type="hidden" name="action" value="delete_box">
        <input type="hidden" name="box_id" value="${currentDeleteId}">
    `;
    document.body.appendChild(form);
    form.submit();
    
    bootstrap.Modal.getInstance(document.getElementById('deleteConfirmModal')).hide();
}

// Cancel edit
function cancelEdit() {
    currentEditingBoxId = null;
    
    const editSectionEl = document.getElementById('editSection');
    const noEditSectionEl = document.getElementById('noEditSection');
    const printSectionEl = document.getElementById('printSection');
    const noPrintSectionEl = document.getElementById('noPrintSection');
    
    if (editSectionEl) editSectionEl.style.display = 'none';
    if (noEditSectionEl) noEditSectionEl.style.display = 'block';
    if (printSectionEl) printSectionEl.style.display = 'none';
    if (noPrintSectionEl) noPrintSectionEl.style.display = 'block';
    
    document.querySelectorAll('.box-row').forEach(r => r.style.backgroundColor = '');
}

// Barcode generation
function generateBarcodePreview() {
    const boxNumber = document.getElementById('print_box_number').textContent.trim();
    
    if (!boxNumber || boxNumber === '-') {
        alert('Please select a box first');
        return;
    }
    
    const barcodeEl = document.getElementById('boxBarcode');
    const containerEl = document.getElementById('barcodePreviewContainer');
    const printBtn = document.getElementById('printBoxBtn');
    
    if (barcodeEl) {
        barcodeEl.innerHTML = '';
        
        try {
            JsBarcode("#boxBarcode", boxNumber, {
                format: "CODE128",
                width: 2,
                height: 100,
                displayValue: true,
                margin: 10
            });
            
            console.log('Barcode generated for box:', boxNumber);
            
            if (containerEl) {
                containerEl.style.display = 'block';
            }
            if (printBtn) {
                printBtn.style.display = 'block';
            }
            
        } catch (error) {
            console.error('Error generating barcode:', error);
            alert('Error generating barcode. Make sure jsbarcode library is loaded.');
        }
    }
}

// Print barcode
function printBarcode() {
    const boxNumber = document.getElementById('print_box_number').textContent.trim();
    
    if (!boxNumber || boxNumber === '-') {
        alert('Please select a box first');
        return;
    }
    
    console.log('Printing barcode for box:', boxNumber);
    
    if (window.qzPrinter && window.qzPrinter.connected) {
        printWithQZTray(boxNumber);
    } else {
        printWithBrowserDialog(boxNumber);
    }
}

// Print with QZ Tray
function printWithQZTray(boxNumber) {
    try {
        if (!window.qzPrinter || !window.qzPrinter.connected) {
            console.log('QZ Tray not connected, falling back to browser print');
            printWithBrowserDialog(boxNumber);
            return;
        }
        
        const svgElement = document.getElementById('boxBarcode');
        if (!svgElement) {
            console.error('Barcode element not found');
            printWithBrowserDialog(boxNumber);
            return;
        }
        
        const printerSelect = document.getElementById('printer-select');
        const selectedPrinter = printerSelect ? printerSelect.value : '';
        
        console.log('Printing to QZ Tray - Selected printer:', selectedPrinter || 'Default');
        
        window.qzPrinter.printSVGBarcode(svgElement, 'Box: ' + boxNumber, selectedPrinter)
            .then(() => {
                console.log('✅ Print job sent successfully');
                const printerName = selectedPrinter || 'default printer';
                alert('Print job sent to ' + printerName + ' successfully!');
            })
            .catch(error => {
                console.error('Print error:', error);
                console.log('Falling back to browser print');
                printWithBrowserDialog(boxNumber);
            });
        
    } catch (error) {
        console.error('QZ Tray printing error:', error);
        printWithBrowserDialog(boxNumber);
    }
}

// Browser print fallback
function printWithBrowserDialog(boxNumber) {
    const printWindow = window.open('', '', 'height=400,width=600');
    const barcodeSvg = document.getElementById('boxBarcode').innerHTML;
    
    printWindow.document.write('<html><head><title>Print Box Label</title>');
    printWindow.document.write('<style>');
    printWindow.document.write('body { font-family: Arial, sans-serif; text-align: center; padding: 20px; }');
    printWindow.document.write('h2 { margin-bottom: 30px; }');
    printWindow.document.write('svg { max-width: 100%; height: auto; margin: 20px 0; }');
    printWindow.document.write('</style></head><body>');
    printWindow.document.write('<h2>Box: ' + boxNumber + '</h2>');
    printWindow.document.write('<svg id="barcode">' + barcodeSvg + '</svg>');
    printWindow.document.write('<p style="margin-top: 40px; font-size: 14px; color: #666;">');
    printWindow.document.write('Printed on: ' + new Date().toLocaleString());
    printWindow.document.write('</p></body></html>');
    printWindow.document.close();
    
    setTimeout(function() {
        printWindow.print();
    }, 250);
}

// QZ Tray status update
function updateQZStatus(message, status = 'info') {
    const statusEl = document.getElementById('qz-status');
    if (statusEl) {
        statusEl.textContent = 'QZ Tray: ' + message;
        statusEl.className = status === 'success' ? 'text-success fw-bold' : 
                             status === 'warning' ? 'text-warning' : 'text-muted';
    }
}

// Test QZ Tray
function testQZTrayConnection() {
    if (window.qzPrinter && window.qzPrinter.connected) {
        const printers = window.qzPrinter.availablePrinters;
        const printerList = printers.length > 0 
            ? printers.join('\n• ') 
            : 'No printers found';
        alert('✅ QZ Tray is connected and ready!\n\nAvailable printers:\n• ' + printerList);
    } else {
        alert('⚠️ QZ Tray is not connected.\nBrowser print will be used instead.');
    }
}

// Initialize on page load
document.addEventListener('DOMContentLoaded', function() {
    updateDeleteBtn();
    
    // Initialize QZ Tray
    setTimeout(() => {
        if (window.qzPrinter) {
            if (window.qzPrinter.connected) {
                updateQZStatus('Connected ✅', 'success');
                populatePrinterSelect();
            } else {
                updateQZStatus('Not Available (will use browser print)', 'warning');
            }
        }
    }, 500);
    
    // Handle printer selection change
    const printerSelect = document.getElementById('printer-select');
    if (printerSelect) {
        printerSelect.addEventListener('change', function() {
            if (window.qzPrinter) {
                window.qzPrinter.selectPrinter(this.value);
            }
        });
    }
});

// Populate printer select
function populatePrinterSelect() {
    if (!window.qzPrinter || !window.qzPrinter.availablePrinters.length) {
        return;
    }
    
    const printerSelect = document.getElementById('printer-select');
    if (!printerSelect) return;
    
    printerSelect.innerHTML = '<option value="">Default Printer</option>';
    
    window.qzPrinter.availablePrinters.forEach(printer => {
        const option = document.createElement('option');
        option.value = printer;
        option.textContent = printer;
        if (printer === window.qzPrinter.selectedPrinter) {
            option.selected = true;
        }
        printerSelect.appendChild(option);
    });
}
</script>

<style>
.sticky-top {
    z-index: 10;
}

.table-hover tbody tr:hover {
    background-color: #f8f9fa;
}

.card {
    border-radius: 8px;
}

.card-header {
    border-radius: 8px 8px 0 0;
}

#boxesTable {
    font-size: 0.95rem;
}

.btn-outline-primary:hover {
    transform: scale(1.05);
    transition: all 0.2s;
}
</style>
{% endblock %}