// Equipment Management JavaScript

// File Upload with Drag & Drop
function initializeFileUpload() {
    const fileInput = document.getElementById('manualFile');
    const uploadForm = document.getElementById('uploadManualForm');

    if (!fileInput || !uploadForm) return;

    // Drag and drop handlers
    const dropZone = uploadForm.querySelector('.file-upload-zone');
    if (dropZone) {
        dropZone.addEventListener('dragover', (e) => {
            e.preventDefault();
            dropZone.classList.add('dragover');
        });

        dropZone.addEventListener('dragleave', () => {
            dropZone.classList.remove('dragover');
        });

        dropZone.addEventListener('drop', (e) => {
            e.preventDefault();
            dropZone.classList.remove('dragover');

            const files = e.dataTransfer.files;
            if (files.length > 0) {
                fileInput.files = files;
                uploadForm.dispatchEvent(new Event('submit', { bubbles: true }));
            }
        });
    }
}

// Client-side Cost Calculation
function initializeCostCalculation() {
    const laborCostInput = document.querySelector('input[name="LaborCost"]');
    const partsCostInput = document.querySelector('input[name="PartsCost"]');
    const totalCostDisplay = document.getElementById('totalCostDisplay');

    if (!laborCostInput || !partsCostInput) return;

    function calculateTotal() {
        const laborCost = parseFloat(laborCostInput.value) || 0;
        const partsCost = parseFloat(partsCostInput.value) || 0;
        const totalCost = laborCost + partsCost;

        if (totalCostDisplay) {
            totalCostDisplay.textContent = totalCost.toLocaleString('en-US', {
                style: 'currency',
                currency: 'USD'
            });
        }
    }

    laborCostInput.addEventListener('input', calculateTotal);
    partsCostInput.addEventListener('input', calculateTotal);

    // Calculate on page load
    calculateTotal();
}

// Equipment Status Change Handler
function initializeStatusChangeHandler() {
    const statusSelect = document.querySelector('select[name="Status"]');

    if (!statusSelect) return;

    statusSelect.addEventListener('change', function() {
        const selectedStatus = this.value;

        // Add visual feedback based on status
        const card = this.closest('.card');
        if (card) {
            card.classList.remove('border-success', 'border-warning', 'border-danger', 'border-info');

            switch(selectedStatus) {
                case 'Operational':
                    card.classList.add('border-success');
                    break;
                case 'NeedsMaintenance':
                    card.classList.add('border-warning');
                    break;
                case 'UnderMaintenance':
                    card.classList.add('border-info');
                    break;
                case 'OutOfService':
                    card.classList.add('border-danger');
                    break;
            }
        }
    });
}

// Maintenance Due Reminder
function checkMaintenanceDue() {
    const daysUntilMaintenance = document.querySelector('[data-days-until-maintenance]');

    if (!daysUntilMaintenance) return;

    const days = parseInt(daysUntilMaintenance.dataset.daysUntilMaintenance);

    if (days !== null && days < 7 && days >= 0) {
        showToast(`Maintenance due in ${days} days!`, 'warning');
    } else if (days < 0) {
        showToast(`Maintenance is overdue by ${Math.abs(days)} days!`, 'danger');
    }
}

// Show Toast Notification
function showToast(message, type = 'info') {
    const toastHTML = `
        <div class="toast align-items-center text-white bg-${type} border-0 position-fixed bottom-0 end-0 m-3" role="alert" aria-live="assertive" aria-atomic="true">
            <div class="d-flex">
                <div class="toast-body">
                    ${message}
                </div>
                <button type="button" class="btn-close btn-close-white me-2 m-auto" data-bs-dismiss="toast" aria-label="Close"></button>
            </div>
        </div>
    `;

    document.body.insertAdjacentHTML('beforeend', toastHTML);
    const toastElement = document.querySelector('.toast:last-child');
    const toast = new bootstrap.Toast(toastElement);
    toast.show();

    // Remove from DOM after hidden
    toastElement.addEventListener('hidden.bs.toast', () => {
        toastElement.remove();
    });
}

// Confirm Delete with Modal
function confirmDelete(event, itemName, itemType) {
    if (!confirm(`Are you sure you want to delete this ${itemType}: ${itemName}?\n\nThis action cannot be undone.`)) {
        event.preventDefault();
        return false;
    }
    return true;
}

// Search and Filter Tables
function initializeTableSearch(inputId, tableId) {
    const searchInput = document.getElementById(inputId);
    const table = document.getElementById(tableId);

    if (!searchInput || !table) return;

    searchInput.addEventListener('input', function() {
        const searchTerm = this.value.toLowerCase();
        const rows = table.querySelectorAll('tbody tr');

        rows.forEach(row => {
            const text = row.textContent.toLowerCase();
            row.style.display = text.includes(searchTerm) ? '' : 'none';
        });
    });
}

// Initialize all features on page load
document.addEventListener('DOMContentLoaded', function() {
    initializeFileUpload();
    initializeCostCalculation();
    initializeStatusChangeHandler();
    checkMaintenanceDue();

    // Initialize table searches if present
    initializeTableSearch('searchInput', 'equipmentTable');
    initializeTableSearch('searchInput', 'maintenanceTable');
});

// Export functions for use in other scripts
window.EquipmentManagement = {
    showToast,
    confirmDelete,
    initializeFileUpload,
    initializeCostCalculation
};