Invoice
Invoice #: ${invoiceDetails.number}
Issue Date: ${invoiceDetails.issueDate}
Due Date: ${invoiceDetails.dueDate}
| Description |
Quantity |
Rate |
Amount |
${lineItemsHtml}
Subtotal
${formatCurrency(subtotal)}
Tax (${taxRate}%)
${formatCurrency(taxAmount)}
Total
${formatCurrency(total)}
`;
document.getElementById('download-pdf-btn').addEventListener('click', generatePdf);
};
const renderDataConfig = () => {
const configContent = document.getElementById('content-data-config');
if (!configContent) return;
const lineItemsHtml = appData.lineItems.map((item, index) => `
`).join('');
configContent.innerHTML = `
`;
attachConfigListeners();
};
const attachConfigListeners = () => {
document.getElementById('add-item-btn').addEventListener('click', () => {
appData.lineItems.push({ description: '', quantity: 1, rate: 0 });
renderDataConfig();
lucide.createIcons();
});
document.querySelectorAll('.remove-item-btn').forEach(btn => btn.addEventListener('click', e => {
appData.lineItems.splice(parseInt(e.currentTarget.dataset.index), 1);
renderDataConfig();
lucide.createIcons();
}));
document.getElementById('update-data-btn').addEventListener('click', handleConfigUpdate);
};
const handleConfigUpdate = () => {
// Company
appData.company.name = document.getElementById('company-name').value;
appData.company.address = document.getElementById('company-address').value;
appData.company.email = document.getElementById('company-email').value;
appData.company.phone = document.getElementById('company-phone').value;
appData.company.logoUrl = document.getElementById('company-logoUrl').value;
// Client
appData.client.name = document.getElementById('client-name').value;
appData.client.address = document.getElementById('client-address').value;
appData.client.email = document.getElementById('client-email').value;
// Invoice Details
appData.invoiceDetails.number = document.getElementById('invoice-number').value;
appData.invoiceDetails.issueDate = document.getElementById('invoice-issueDate').value;
appData.invoiceDetails.dueDate = document.getElementById('invoice-dueDate').value;
// Line Items
const newLineItems = [];
document.querySelectorAll('.line-item-row').forEach(row => {
newLineItems.push({
description: row.querySelector('[data-field="description"]').value,
quantity: parseFloat(row.querySelector('[data-field="quantity"]').value) || 0,
rate: parseFloat(row.querySelector('[data-field="rate"]').value) || 0,
});
});
appData.lineItems = newLineItems;
// Tax & Notes
appData.taxRate = parseFloat(document.getElementById('tax-rate').value) || 0;
appData.notes = document.getElementById('notes').value;
renderInvoicePreview();
alert('Invoice updated successfully!');
switchTab(0);
};
const generatePdf = () => {
loadingOverlay.style.display = 'flex';
const { jsPDF } = window.jspdf;
const pdfContent = document.getElementById('pdf-content-area');
html2canvas(pdfContent, { scale: 2, useCORS: true, logging: false })
.then(canvas => {
const imgData = canvas.toDataURL('image/png');
const pdf = new jsPDF({ orientation: 'portrait', unit: 'px', format: 'a4' });
const pdfWidth = pdf.internal.pageSize.getWidth();
const pdfHeight = pdf.internal.pageSize.getHeight();
const canvasWidth = canvas.width;
const canvasHeight = canvas.height;
const ratio = canvasWidth / canvasHeight;
const imgWidth = pdfWidth;
const imgHeight = imgWidth / ratio;
let heightLeft = imgHeight;
let position = 0;
pdf.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight);
heightLeft -= pdfHeight;
while (heightLeft > 0) {
position = heightLeft - imgHeight;
pdf.addPage();
pdf.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight);
heightLeft -= pdfHeight;
}
pdf.save(`Invoice-${appData.invoiceDetails.number}.pdf`);
loadingOverlay.style.display = 'none';
}).catch(err => {
console.error("PDF generation failed:", err);
loadingOverlay.style.display = 'none';
alert('An error occurred while generating the PDF.');
});
};
// --- TAB NAVIGATION & INITIALIZATION ---
const switchTab = (tabIndex) => {
activeTabIndex = tabIndex;
document.querySelectorAll('.tab-btn').forEach((btn, i) => btn.classList.toggle('active', i === tabIndex));
document.querySelectorAll('.tab-content').forEach((content, i) => content.classList.toggle('hidden', i !== tabIndex));
updateNavButtons();
};
const updateNavButtons = () => {
prevTabBtn.disabled = activeTabIndex === 0;
nextTabBtn.disabled = activeTabIndex === tabIdentifiers.length - 1;
};
const initializeUI = () => {
const tabs = [
{ name: 'Invoice Preview', id: 'invoice-preview' },
{ name: 'Configuration', id: 'data-config' }
];
tabIdentifiers = tabs.map(t => t.id);
tabsContainer.innerHTML = tabs.map(tab => `
`).join('');
mainContent.innerHTML = tabs.map(tab => `
`).join('');
tabs.forEach((tab, index) => {
document.getElementById(`tab-${tab.id}`).addEventListener('click', () => switchTab(index));
});
renderInvoicePreview();
renderDataConfig();
switchTab(0);
};
initializeUI();
lucide.createIcons();
prevTabBtn.addEventListener('click', () => { if (activeTabIndex > 0) switchTab(activeTabIndex - 1); });
nextTabBtn.addEventListener('click', () => { if (activeTabIndex < tabIdentifiers.length - 1) switchTab(activeTabIndex + 1); });
});
