function confirmPRApproveReject(isApprove, Remarks) {
    loader = $('#overlay, #loader').css('z-index', 1060);
    var ItemNo = document.getElementById("itemNo").value;

    var Status = isApprove;

    showConfirmation({
        title: 'P.R. Item Approval',
        message: 'Are you sure you want to approve this item? This action cannot be undone.',
        type: 'warning',
        confirmText: 'Yes, Approve',
        cancelText: 'No'
    }).then((confirmed) => {
        if (confirmed) {
        $.ajax({
            url: endpoint.PostPRApproveReject,
            type: 'POST',
            data: { ItemNo: ItemNo, Status: Status, PRDetailsId: PRDetailsId, Remarks: Remarks }, 
            success: function (response) {
                if (response.success) {     
                    getApproverName(PRDetailsId);

                    prDataTable.ajax.reload(null, false);
                    isApproval = true;

                    if (isApprove == 1) {
                        hideButtonApproval(true);
                        $('#viewPRItemDetails').modal('hide');
                        $('#addRemarksUpdate').modal('hide');
                        showToast('success', 'Item successfully approved!', 'Success', 4000);
                    }
                } else {
                    hideButtonApproval(true);
                    prDataTable.ajax.reload(null, false);
                    showToast('error', response.response, title + ' failed', 4000);
                }
            },
            beforeSend: function () {
                loader.show();
            },
            complete: function () {
                loader.hide();
            }
        });
        }
    });
}

$(document).ready(function () {
    loader = $('#overlay, #loader');
   
    UserRights = document.getElementById("roleRights").value;

    prTable = $('#PRTable').DataTable({
        ajax: {
            url: '/PRMgmt/GetAllPR', 
            type: 'GET',
            beforeSend: function () {
                // Show the loader before making the AJAX request
                loader.show();
            },
            complete: function () {
                loader.hide();
            }
        },
        initComplete: initCompleteCallback,
        columns: colOnPRTable,
        order: [10, 'asc'],
        rowCallback: rowStatusColorCallback,
        responsive: true,
        language: {
            emptyTable: "No record available"
        },
        error: errorHandler
    });
})
function submitItem() {
    loader = $('#overlay, #loader');

    var selectedCheckboxes = $('.selectedItem-checkbox:checked');
    var requestData = [];

    selectedCheckboxes.each(function () {
        var $row = $(this).closest('tr');
        var rowIndex = itemTable.row($row).index();
        var rowData = itemTable.row(rowIndex).data();

        var itemCartId = rowData.itemCartId;
        var qty = $row.find('.editable-qty').val() || rowData.qty;

        var itemData = {
            itemCartId: itemCartId,
            qty: qty
        };

        requestData.push(itemData);
    });
    const confirmation = confirm('Are you sure you want to proceed?');

    if (confirmation) {
        $.ajax({
            url: '/ItemMgmt/PostPurchRequest',
            type: 'POST',
            data: { ItemCartIds: requestData },
            success: function (response) {
                if (response.success) {
                    itemTable.ajax.reload();
                    window.location.href = '/ItemMgmt/Index';
                    alert('Successfully requested!');

                } else {
                    itemTable.ajax.reload();
                    alert('Failed: ' + response.response);
                }
            },
            beforeSend: function () {
                loader.show();
            },
            complete: function () {
                loader.hide();
            }
        });
    }
}
const fileInput = document.getElementById('fileAttachment');
const fileInfoBadge = document.getElementById('fileInfoBadge');
const fileNameDisplay = document.getElementById('fileNameDisplay');
const fileSizeDisplay = document.getElementById('fileSizeDisplay');
const btnUploadContainer = document.getElementById('btnUploadContainer');
const btnUploadText = document.getElementById('btnUploadText');

let selectedFile = null;
let existingAttachment = false; // Set this to true if there's already an attachment

// File input change event
fileInput.addEventListener('change', function (e) {
    const file = e.target.files[0];

    if (file) {
        // Validate file size (5MB max)
        const maxSize = 5 * 1024 * 1024; // 5MB in bytes
        if (file.size > maxSize) {
            showToast('warning', 'File size exceeds 5MB. Please choose a smaller file.', 'File Upload', 4000);
            e.target.value = '';
            return;
        }

        // Validate file type
        const allowedExtensions = ['csv', 'xlsx', 'xls', 'pdf'];
        const fileExtension = file.name.split('.').pop().toLowerCase();

        if (!allowedExtensions.includes(fileExtension)) {
            showToast('warning', 'Invalid file type. Please upload CSV, Excel, or PDF files only.', 'File Upload', 4000);
            e.target.value = '';
            return;
        }

        // Store the selected file
        selectedFile = file;

        // Show file info and upload button
        showFileInfo(file);
        showUploadButton();
    }
});

// Show file information
function showFileInfo(file) {
    fileNameDisplay.textContent = truncateFileName(file.name, 30);
    fileSizeDisplay.textContent = formatFileSize(file.size);
    fileInfoBadge.classList.remove('d-none');
}

// Show upload button
function showUploadButton() {
    // Change button text based on whether there's an existing attachment
    if (existingAttachment) {
        btnUploadText.innerHTML = '<i class="bi bi-arrow-repeat me-1"></i>Update Attachment';
    } else {
        btnUploadText.innerHTML = '<i class="bi bi-cloud-upload me-1"></i>Upload Attachment';
    }

    btnUploadContainer.classList.remove('d-none');
}

// Clear file attachment
function clearFileAttachment() {
    fileInput.value = '';
    selectedFile = null;
    fileInfoBadge.classList.add('d-none');
    btnUploadContainer.classList.add('d-none');
}

// Upload attachment function
function uploadAttachment() {
    if (!selectedFile) {
        showToast('warning', 'Please select a file first.', 'File Upload', 3000);
        return;
    }
    const formData = new FormData();
    formData.append('file', selectedFile);
    formData.append('prId', $('#prId').val()); 

    formData.append('oldFileName', $('#fileName').val());

    // Show loading state
    btnUploadText.innerHTML = '<span class="spinner-border spinner-border-sm me-1"></span>Uploading...';
    document.querySelector('#btnUploadContainer button').disabled = true;

    fetch('/PRMgmt/UploadAttachment', { 
        method: 'POST',
        body: formData
    })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                showToast('success', 'Attachment uploaded successfully!', 'File Upload', 3000);
                existingAttachment = true;

                $('#fileName').val(data.newFileName)
                // Update the download button if needed
                document.getElementById('btnDownloadAttachment').classList.remove('d-none');

                clearFileAttachment();
            } else {
                showToast('error', data.message || 'Upload failed. Please try again.', 'File Upload', 4000);
            }
        })
        .catch(error => {
            console.error('Upload error:', error);
            showToast('error', 'An error occurred during upload.', 'File Upload', 4000);
        })
        .finally(() => {
            // Reset button state
            document.querySelector('#btnUploadContainer button').disabled = false;
            showUploadButton(); // Restore button text
        });
}

// Truncate long file names
function truncateFileName(fileName, maxLength) {
    if (fileName.length <= maxLength) return fileName;

    const extension = fileName.split('.').pop();
    const nameWithoutExt = fileName.substring(0, fileName.lastIndexOf('.'));
    const truncatedName = nameWithoutExt.substring(0, maxLength - extension.length - 4) + '...';

    return truncatedName + '.' + extension;
}

// Format file size
function formatFileSize(bytes) {
    if (bytes === 0) return '0 Bytes';
    const k = 1024;
    const sizes = ['Bytes', 'KB', 'MB'];
    const i = Math.floor(Math.log(bytes) / Math.log(k));
    return Math.round(bytes / Math.pow(k, i) * 100) / 100 + ' ' + sizes[i];
}

// Initialize: Check if there's an existing attachment on page load
function checkExistingAttachment() {
    // Replace with your logic to check if attachment exists
    // For example, check if there's a filename in your hidden input
    const existingFileName = document.getElementById('fileName').value;

    if (existingFileName) {
        existingAttachment = true;
        document.getElementById('btnDownloadAttachment').classList.remove('d-none');
    } else {
        existingAttachment = false;
    }
}