Due Date
${appData.details.dueDate}
| Description |
Qty |
Unit Price |
Total |
${lineItemsHtml}
Subtotal:${formatCurrency(subtotal)}
Discount (${appData.totals.discountType === 'percent' ? appData.totals.discountValue+'%' : formatCurrency(appData.totals.discountValue)}):-${formatCurrency(discountAmount)}
Tax (${appData.totals.taxRate}%):${formatCurrency(taxAmount)}
Total:${formatCurrency(total)}
`;
document.getElementById('download-pdf-btn').addEventListener('click', generatePdf);
};
const renderInfoConfig = () => {
const configContent = document.getElementById('content-info-config');
if(!configContent) return;
configContent.innerHTML = `
`;
attachConfigListeners();
};
const renderItemsConfig = () => {
const configContent = document.getElementById('content-items-config');
if (!configContent) return;
const itemsHtml = appData.items.map(item => `
|
|
|
${formatCurrency(item.quantity * item.unitPrice)} |
|
`).join('');
configContent.innerHTML = `
Invoice Line Items
| Description |
Qty |
Unit Price |
Total |
|
${itemsHtml}
`;
attachItemsConfigListeners();
};
// --- EVENT HANDLERS & LOGIC ---
const attachConfigListeners = () => {
document.querySelectorAll('#content-info-config .config-input').forEach(input => {
input.addEventListener('input', e => {
const path = e.target.dataset.path.split('.');
let current = appData;
path.slice(0, -1).forEach(key => current = current[key]);
current[path[path.length - 1]] = e.target.value;
renderInvoicePreview();
});
});
};
const attachItemsConfigListeners = () => {
document.querySelectorAll('.item-input').forEach(input => {
input.addEventListener('input', e => {
const id = parseInt(e.target.dataset.id);
const field = e.target.dataset.field;
const value = e.target.type === 'number' ? parseFloat(e.target.value) || 0 : e.target.value;
const item = appData.items.find(i => i.id === id);
if(item) item[field] = value;
renderInvoicePreview();
renderItemsConfig(); // Re-render to update total column
});
});
document.querySelectorAll('.remove-item-btn').forEach(btn => {
btn.addEventListener('click', e => {
const id = parseInt(e.currentTarget.dataset.id);
appData.items = appData.items.filter(i => i.id !== id);
renderInvoicePreview();
renderItemsConfig();
});
});
document.getElementById('add-item-btn').addEventListener('click', () => {
const newId = appData.items.length > 0 ? Math.max(...appData.items.map(i => i.id)) + 1 : 1;
appData.items.push({ id: newId, description: 'New Item', quantity: 1, unitPrice: 0 });
renderInvoicePreview();
renderItemsConfig();
});
};
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 imgProps = pdf.getImageProperties(imgData);
const imgHeight = (imgProps.height * pdfWidth) / imgProps.width;
pdf.addImage(imgData, 'PNG', 0, 0, pdfWidth, imgHeight);
pdf.save(`Invoice-${appData.details.invoiceNumber}.pdf`);
loadingOverlay.style.display = 'none';
}).catch(err => {
console.error("PDF generation failed:", err);
loadingOverlay.style.display = 'none';
alert('An error occurred 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: 'Company & Client', id: 'info-config' },
{ name: 'Line Items', id: 'items-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();
renderInfoConfig();
renderItemsConfig();
switchTab(0);
lucide.createIcons();
};
initializeUI();
prevTabBtn.addEventListener('click', () => { if (activeTabIndex > 0) switchTab(activeTabIndex - 1); });
nextTabBtn.addEventListener('click', () => { if (activeTabIndex < tabIdentifiers.length - 1) switchTab(activeTabIndex + 1); });
});
