{% extends "base.html" %}
{% load static %}

{% block title %}Inventory Items - Inventory Management{% endblock %}

{% block css %}
<link href="{% static 'plugins/datatables.net-bs5/css/dataTables.bootstrap5.min.css' %}" rel="stylesheet" />
<link href="{% static 'plugins/datatables.net-responsive-bs5/css/responsive.bootstrap5.min.css' %}" rel="stylesheet" />
<link href="{% static 'plugins/select2/dist/css/select2.min.css' %}" rel="stylesheet" />
<link href="{% static 'plugins/bootstrap-datepicker/dist/css/bootstrap-datepicker.min.css' %}" rel="stylesheet" />
{% endblock %}

{% block content %}
<!-- BEGIN breadcrumb -->
<ol class="breadcrumb float-xl-end">
    <li class="breadcrumb-item"><a href="{% url 'core:dashboard' %}">Dashboard</a></li>
    <li class="breadcrumb-item"><a href="{% url 'inventory:dashboard' %}">Inventory</a></li>
    <li class="breadcrumb-item active">Items</li>
</ol>
<!-- END breadcrumb -->

<!-- BEGIN page-header -->
<h1 class="page-header">
    Inventory Items
    <small>Medical Supplies & Equipment Catalog</small>
</h1>
<!-- END page-header -->

<!-- BEGIN panel -->
<div class="panel panel-inverse">
    <div class="panel-heading">
        <h4 class="panel-title">Inventory Items Management</h4>
        <div class="panel-heading-btn">
            <a href="{% url 'inventory:item_create' %}" class="btn btn-xs btn-success me-2">
                <i class="fa fa-plus"></i> Add Item
            </a>
            <a href="javascript:;" class="btn btn-xs btn-icon btn-default" data-toggle="panel-expand"><i class="fa fa-expand"></i></a>
            <a href="javascript:;" class="btn btn-xs btn-icon btn-default" data-toggle="panel-reload"><i class="fa fa-redo"></i></a>
            <a href="javascript:;" class="btn btn-xs btn-icon btn-default" data-toggle="panel-collapse"><i class="fa fa-minus"></i></a>
        </div>
    </div>
    <div class="panel-body">
        <!-- Filters and Search -->
        <div class="row mb-3">
            <div class="col-md-3">
                <label class="form-label">Search Items</label>
                <div class="input-group">
                    <input type="text" class="form-control" id="search-input" placeholder="Item name, code, or description...">
                    <button class="btn btn-outline-secondary" type="button" id="search-btn">
                        <i class="fa fa-search"></i>
                    </button>
                </div>
            </div>
            <div class="col-md-2">
                <label class="form-label">Category</label>
                <select class="form-select" id="category-filter">
                    <option value="">All Categories</option>
                    <option value="MEDICAL_SUPPLIES">Medical Supplies</option>
                    <option value="PHARMACEUTICALS">Pharmaceuticals</option>
                    <option value="SURGICAL_INSTRUMENTS">Surgical Instruments</option>
                    <option value="DIAGNOSTIC_EQUIPMENT">Diagnostic Equipment</option>
                    <option value="PATIENT_CARE">Patient Care Equipment</option>
                    <option value="LABORATORY_SUPPLIES">Laboratory Supplies</option>
                    <option value="RADIOLOGY_SUPPLIES">Radiology Supplies</option>
                    <option value="OTHER">Other</option>
                </select>
            </div>
            <div class="col-md-2">
                <label class="form-label">Item Type</label>
                <select class="form-select" id="type-filter">
                    <option value="">All Types</option>
                    <option value="CONSUMABLE">Consumable</option>
                    <option value="REUSABLE">Reusable</option>
                    <option value="EQUIPMENT">Equipment</option>
                    <option value="MEDICATION">Medication</option>
                    <option value="DEVICE">Medical Device</option>
                </select>
            </div>
            <div class="col-md-2">
                <label class="form-label">Stock Status</label>
                <select class="form-select" id="stock-filter">
                    <option value="">All Items</option>
                    <option value="in_stock">In Stock</option>
                    <option value="low_stock">Low Stock</option>
                    <option value="out_of_stock">Out of Stock</option>
                    <option value="needs_reorder">Needs Reorder</option>
                </select>
            </div>
            <div class="col-md-3">
                <label class="form-label">Manufacturer</label>
                <select class="form-select select2" id="manufacturer-filter">
                    <option value="">All Manufacturers</option>
                    <!-- Options will be loaded dynamically -->
                </select>
            </div>
        </div>

        <!-- Quick Stats -->
        <div class="row mb-4">
            <div class="col-lg-3 col-md-6 mb-3">
                <div class="card border-0 bg-primary text-white">
                    <div class="card-body">
                        <div class="d-flex align-items-center">
                            <div class="flex-fill">
                                <div class="fs-10px text-white-transparent-5 mb-1">TOTAL ITEMS</div>
                                <div class="fs-18px fw-900 text-white" id="total-items">-</div>
                            </div>
                            <div class="w-50px h-50px bg-white-transparent-2 rounded-circle d-flex align-items-center justify-content-center">
                                <i class="fa fa-boxes fa-lg text-white"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div class="col-lg-3 col-md-6 mb-3">
                <div class="card border-0 bg-warning text-white">
                    <div class="card-body">
                        <div class="d-flex align-items-center">
                            <div class="flex-fill">
                                <div class="fs-10px text-white-transparent-5 mb-1">LOW STOCK ITEMS</div>
                                <div class="fs-18px fw-900 text-white" id="low-stock-count">-</div>
                            </div>
                            <div class="w-50px h-50px bg-white-transparent-2 rounded-circle d-flex align-items-center justify-content-center">
                                <i class="fa fa-exclamation-triangle fa-lg text-white"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div class="col-lg-3 col-md-6 mb-3">
                <div class="card border-0 bg-danger text-white">
                    <div class="card-body">
                        <div class="d-flex align-items-center">
                            <div class="flex-fill">
                                <div class="fs-10px text-white-transparent-5 mb-1">OUT OF STOCK</div>
                                <div class="fs-18px fw-900 text-white" id="out-of-stock-count">-</div>
                            </div>
                            <div class="w-50px h-50px bg-white-transparent-2 rounded-circle d-flex align-items-center justify-content-center">
                                <i class="fa fa-times-circle fa-lg text-white"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div class="col-lg-3 col-md-6 mb-3">
                <div class="card border-0 bg-success text-white">
                    <div class="card-body">
                        <div class="d-flex align-items-center">
                            <div class="flex-fill">
                                <div class="fs-10px text-white-transparent-5 mb-1">TOTAL VALUE</div>
                                <div class="fs-18px fw-900 text-white" id="total-value">-</div>
                            </div>
                            <div class="w-50px h-50px bg-white-transparent-2 rounded-circle d-flex align-items-center justify-content-center">
                                <i class="fa fa-dollar-sign fa-lg text-white"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Action Buttons -->
        <div class="d-flex justify-content-between align-items-center mb-3">
            <div class="btn-group">
                <button type="button" class="btn btn-outline-secondary" id="bulk-actions-btn" disabled>
                    <i class="fa fa-tasks me-2"></i>Bulk Actions
                </button>
                <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" 
                        data-bs-toggle="dropdown" id="bulk-dropdown" disabled>
                    <span class="visually-hidden">Toggle Dropdown</span>
                </button>
                <ul class="dropdown-menu">
                    <li><a class="dropdown-item" href="#" onclick="bulkUpdateCategory()">
                        <i class="fa fa-tag me-2"></i>Update Category
                    </a></li>
                    <li><a class="dropdown-item" href="#" onclick="bulkUpdateSupplier()">
                        <i class="fa fa-truck me-2"></i>Update Supplier
                    </a></li>
                    <li><hr class="dropdown-divider"></li>
                    <li><a class="dropdown-item" href="#" onclick="bulkExport()">
                        <i class="fa fa-download me-2"></i>Export Selected
                    </a></li>
                    <li><a class="dropdown-item text-danger" href="#" onclick="bulkDeactivate()">
                        <i class="fa fa-ban me-2"></i>Deactivate Selected
                    </a></li>
                </ul>
            </div>
            
            <div class="btn-group">
                <button type="button" class="btn btn-outline-secondary" onclick="refreshTable()">
                    <i class="fa fa-refresh me-2"></i>Refresh
                </button>
                <button type="button" class="btn btn-outline-secondary" onclick="showStockAlerts()">
                    <i class="fa fa-bell me-2"></i>Stock Alerts
                </button>
                <button type="button" class="btn btn-outline-secondary dropdown-toggle" data-bs-toggle="dropdown">
                    <i class="fa fa-download me-2"></i>Export
                </button>
                <ul class="dropdown-menu">
                    <li><a class="dropdown-item" href="#" onclick="exportData('csv')">
                        <i class="fa fa-file-csv me-2"></i>Export as CSV
                    </a></li>
                    <li><a class="dropdown-item" href="#" onclick="exportData('excel')">
                        <i class="fa fa-file-excel me-2"></i>Export as Excel
                    </a></li>
                    <li><a class="dropdown-item" href="#" onclick="exportData('pdf')">
                        <i class="fa fa-file-pdf me-2"></i>Export as PDF
                    </a></li>
                </ul>
            </div>
        </div>

        <!-- Items Table -->
        <div class="table-responsive">
            <table id="items-table" class="table table-striped table-bordered align-middle">
                <thead>
                    <tr>
                        <th width="30">
                            <div class="form-check">
                                <input class="form-check-input" type="checkbox" id="select-all">
                            </div>
                        </th>
                        <th>Item Code</th>
                        <th>Item Name</th>
                        <th>Category</th>
                        <th>Type</th>
                        <th>Manufacturer</th>
                        <th>Current Stock</th>
                        <th>Unit Cost</th>
                        <th>Total Value</th>
                        <th>Status</th>
                        <th width="120">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <!-- Data will be loaded via AJAX -->
                </tbody>
            </table>
        </div>
    </div>
</div>
<!-- END panel -->

<!-- Stock Alerts Modal -->
<div class="modal fade" id="stockAlertsModal" tabindex="-1">
    <div class="modal-dialog modal-xl">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Stock Level Alerts</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <div class="row mb-3">
                    <div class="col-md-4">
                        <select class="form-select" id="alert-type-filter">
                            <option value="">All Alerts</option>
                            <option value="low_stock">Low Stock</option>
                            <option value="out_of_stock">Out of Stock</option>
                            <option value="needs_reorder">Needs Reorder</option>
                            <option value="expiring_soon">Expiring Soon</option>
                        </select>
                    </div>
                    <div class="col-md-4">
                        <select class="form-select" id="alert-priority-filter">
                            <option value="">All Priorities</option>
                            <option value="critical">Critical</option>
                            <option value="high">High</option>
                            <option value="medium">Medium</option>
                            <option value="low">Low</option>
                        </select>
                    </div>
                    <div class="col-md-4">
                        <button class="btn btn-primary" onclick="generateReorderReport()">
                            <i class="fa fa-shopping-cart me-2"></i>Generate Reorder Report
                        </button>
                    </div>
                </div>
                <div id="stock-alerts-content">
                    <!-- Content will be loaded dynamically -->
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
                <button type="button" class="btn btn-primary" onclick="createPurchaseOrders()">Create Purchase Orders</button>
            </div>
        </div>
    </div>
</div>

<!-- Quick View Modal -->
<div class="modal fade" id="itemQuickViewModal" tabindex="-1">
    <div class="modal-dialog modal-lg">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Item Quick View</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body" id="item-quick-view-content">
                <!-- Content will be loaded dynamically -->
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
                <a href="#" class="btn btn-primary" id="view-full-item">View Full Details</a>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block js %}
<script src="{% static 'plugins/datatables.net/js/dataTables.min.js' %}"></script>
<script src="{% static 'plugins/datatables.net-bs5/js/dataTables.bootstrap5.min.js' %}"></script>
<script src="{% static 'plugins/datatables.net-responsive/js/dataTables.responsive.min.js' %}"></script>
<script src="{% static 'plugins/datatables.net-responsive-bs5/js/responsive.bootstrap5.min.js' %}"></script>
<script src="{% static 'plugins/select2/dist/js/select2.min.js' %}"></script>
<script src="{% static 'plugins/bootstrap-datepicker/dist/js/bootstrap-datepicker.min.js' %}"></script>
<script>
$(document).ready(function() {
    var table;
    
    // Initialize DataTable
    table = $('#items-table').DataTable({
        processing: true,
        serverSide: true,
        ajax: {
            url: '',
            data: function(d) {
                d.search_value = $('#search-input').val();
                d.category = $('#category-filter').val();
                d.item_type = $('#type-filter').val();
                d.stock_status = $('#stock-filter').val();
                d.manufacturer = $('#manufacturer-filter').val();
            }
        },
        columns: [
            {
                data: 'id',
                orderable: false,
                render: function(data, type, row) {
                    return '<div class="form-check"><input class="form-check-input item-checkbox" type="checkbox" value="' + data + '"></div>';
                }
            },
            {
                data: 'item_code',
                render: function(data, type, row) {
                    return '<div class="fw-bold">' + data + '</div>';
                }
            },
            {
                data: 'item_name',
                render: function(data, type, row) {
                    return '<div>' +
                           '<div class="fw-bold">' + data + '</div>' +
                           (row.description ? '<div class="text-muted small">' + row.description.substring(0, 50) + '...</div>' : '') +
                           '</div>';
                }
            },
            {
                data: 'category',
                render: function(data, type, row) {
                    return '<span class="badge bg-secondary">' + row.category_display + '</span>';
                }
            },
            {
                data: 'item_type',
                render: function(data, type, row) {
                    var colors = {
                        'CONSUMABLE': 'primary',
                        'REUSABLE': 'success',
                        'EQUIPMENT': 'info',
                        'MEDICATION': 'warning',
                        'DEVICE': 'danger'
                    };
                    return '<span class="badge bg-' + (colors[data] || 'secondary') + '">' + row.item_type_display + '</span>';
                }
            },
            {
                data: 'manufacturer',
                render: function(data, type, row) {
                    return data || '<span class="text-muted">-</span>';
                }
            },
            {
                data: 'current_stock',
                render: function(data, type, row) {
                    var className = '';
                    if (data <= 0) {
                        className = 'text-danger fw-bold';
                    } else if (data <= row.reorder_point) {
                        className = 'text-warning fw-bold';
                    }
                    return '<span class="' + className + '">' + data + ' ' + row.unit_of_measure_display + '</span>';
                }
            },
            {
                data: 'unit_cost',
                render: function(data, type, row) {
                    return '$' + parseFloat(data).toFixed(2);
                }
            },
            {
                data: 'total_value',
                render: function(data, type, row) {
                    return '$' + parseFloat(data).toFixed(2);
                }
            },
            {
                data: 'stock_status',
                render: function(data, type, row) {
                    var badges = {
                        'in_stock': 'bg-success',
                        'low_stock': 'bg-warning',
                        'out_of_stock': 'bg-danger',
                        'needs_reorder': 'bg-info'
                    };
                    return '<span class="badge ' + (badges[data] || 'bg-secondary') + '">' + row.stock_status_display + '</span>';
                }
            },
            {
                data: 'id',
                orderable: false,
                render: function(data, type, row) {
                    return '<div class="btn-group btn-group-sm">' +
                           '<button class="btn btn-outline-primary" onclick="viewItem(' + data + ')" title="View">' +
                           '<i class="fa fa-eye"></i></button>' +
                           '<button class="btn btn-outline-secondary" onclick="editItem(' + data + ')" title="Edit">' +
                           '<i class="fa fa-edit"></i></button>' +
                           '<button class="btn btn-outline-info" onclick="viewStock(' + data + ')" title="Stock">' +
                           '<i class="fa fa-boxes"></i></button>' +
                           '</div>';
                }
            }
        ],
        order: [[1, 'asc']],
        pageLength: 25,
        responsive: true,
        language: {
            processing: '<div class="d-flex justify-content-center"><div class="spinner-border" role="status"></div></div>'
        }
    });
    
    // Initialize Select2
    $('.select2').select2({
        theme: 'bootstrap-5',
        width: '100%'
    });
    
    // Load filter options and stats
    loadFilterOptions();
    loadStats();
    
    // Filter event handlers
    $('#search-input, #category-filter, #type-filter, #stock-filter, #manufacturer-filter').on('change keyup', function() {
        table.draw();
    });
    
    // Select all checkbox
    $('#select-all').on('change', function() {
        $('.item-checkbox').prop('checked', this.checked);
        updateBulkActions();
    });
    
    // Individual checkbox change
    $(document).on('change', '.item-checkbox', function() {
        updateBulkActions();
    });
    
    // Auto-refresh every 5 minutes
    setInterval(function() {
        table.ajax.reload(null, false);
        loadStats();
    }, 300000);
});

function loadFilterOptions() {
    // Load manufacturer options
    $.ajax({
        url: '',
        success: function(data) {
            var select = $('#manufacturer-filter');
            data.forEach(function(manufacturer) {
                select.append('<option value="' + manufacturer + '">' + manufacturer + '</option>');
            });
        }
    });
}

function loadStats() {
    $.ajax({
        url: '{% url "inventory:inventory_stats" %}',
        success: function(data) {
            $('#total-items').text(data.total_items);
            $('#low-stock-count').text(data.low_stock_count);
            $('#out-of-stock-count').text(data.out_of_stock_count);
            $('#total-value').text('$' + parseFloat(data.total_value).toLocaleString());
        }
    });
}

function updateBulkActions() {
    var checkedCount = $('.item-checkbox:checked').length;
    $('#bulk-actions-btn, #bulk-dropdown').prop('disabled', checkedCount === 0);
}

function viewItem(itemId) {
    window.location.href = '{% url "inventory:item_detail" 0 %}'.replace('0', itemId);
}

function editItem(itemId) {
    window.location.href = '{% url "inventory:item_update" 0 %}'.replace('0', itemId);
}

function viewStock(itemId) {
    window.location.href = '{% url "inventory:stock_list" %}?item=' + itemId;
}

function bulkUpdateCategory() {
    var selectedIds = $('.item-checkbox:checked').map(function() {
        return this.value;
    }).get();
    
    if (selectedIds.length === 0) {
        toastr.warning('Please select items to update');
        return;
    }
    
    // Implementation for bulk category update
    toastr.info('Bulk category update functionality will be implemented');
}

function bulkUpdateSupplier() {
    var selectedIds = $('.item-checkbox:checked').map(function() {
        return this.value;
    }).get();
    
    if (selectedIds.length === 0) {
        toastr.warning('Please select items to update');
        return;
    }
    
    // Implementation for bulk supplier update
    toastr.info('Bulk supplier update functionality will be implemented');
}

{#function bulkExport() {#}
{#    var selectedIds = $('.item-checkbox:checked').map(function() {#}
{#        return this.value;#}
{#    }).get();#}
{#    #}
{#    if (selectedIds.length === 0) {#}
{#        toastr.warning('Please select items to export');#}
{#        return;#}
{#    }#}
{#    #}
{#    window.location.href = '{% url "inventory:item_export" %}?ids=' + selectedIds.join(',');#}
{# }#}

function bulkDeactivate() {
    var selectedIds = $('.item-checkbox:checked').map(function() {
        return this.value;
    }).get();
    
    if (selectedIds.length === 0) {
        toastr.warning('Please select items to deactivate');
        return;
    }
    
    if (confirm('Are you sure you want to deactivate ' + selectedIds.length + ' item(s)?')) {
        $.ajax({
            url: '',
            method: 'POST',
            data: {
                'item_ids': selectedIds,
                'csrfmiddlewaretoken': '{{ csrf_token }}'
            },
            success: function(response) {
                if (response.success) {
                    toastr.success(response.message);
                    $('#items-table').DataTable().ajax.reload();
                    $('#select-all').prop('checked', false);
                    updateBulkActions();
                } else {
                    toastr.error('Failed to deactivate items');
                }
            },
            error: function() {
                toastr.error('An error occurred during bulk deactivation');
            }
        });
    }
}

{#function exportData(format) {#}
{#    window.location.href = '{% url "inventory:item_export" %}?format=' + format;#}
{# }#}

function refreshTable() {
    $('#items-table').DataTable().ajax.reload();
    loadStats();
    toastr.info('Table refreshed');
}

function showStockAlerts() {
    $('#stockAlertsModal').modal('show');
    loadStockAlerts();
}

{#function loadStockAlerts() {#}
{#    $.ajax({#}
{#        url: '{% url "inventory:stock_alerts_api" %}',#}
{#        success: function(data) {#}
{#            $('#stock-alerts-content').html(data.html);#}
{#        },#}
{#        error: function() {#}
{#            toastr.error('Failed to load stock alerts');#}
{#        }#}
{#    });#}
{# } #}

{#function generateReorderReport() {#}
{#    window.open('{% url "inventory:reorder_report" %}', '_blank');#}
{# }#}

function createPurchaseOrders() {
    // Implementation for creating purchase orders from alerts
    toastr.info('Purchase order creation functionality will be implemented');
}
</script>
{% endblock %}