Total Revenue
${formatCurrency(totalRevenue)}
Total Transactions
${totalTransactions}
Average Sale Value
${formatCurrency(avgSaleValue)}
Top Selling Product
${topSellingProduct}
`;
renderDashboardCharts(salesByPaymentMethod);
document.getElementById('download-pdf-btn').addEventListener('click', generatePdf);
};
const renderDashboardCharts = (salesByPaymentMethod) => {
const paymentCtx = document.getElementById('sales-by-payment-chart').getContext('2d');
if(charts.payment) charts.payment.destroy();
charts.payment = new Chart(paymentCtx, {
type: 'doughnut',
data: {
labels: Object.keys(salesByPaymentMethod),
datasets: [{ data: Object.values(salesByPaymentMethod), backgroundColor: ['#34d399', '#60a5fa', '#facc15'] }]
},
options: { responsive: true, maintainAspectRatio: false, plugins: { title: { display: true, text: 'Sales by Payment Method' }, legend: { position: 'bottom' } } }
});
const timeCtx = document.getElementById('sales-by-time-chart').getContext('2d');
if(charts.time) charts.time.destroy();
const hourlySales = appData.transactions.reduce((acc, t) => {
const hour = new Date(t.date).getHours();
acc[hour] = (acc[hour] || 0) + t.total;
return acc;
}, Array(24).fill(0));
charts.time = new Chart(timeCtx, {
type: 'bar',
data: {
labels: Array.from({length: 15}, (_, i) => `${i+8}:00`), // 8am to 10pm
datasets: [{ label: 'Sales Revenue', data: hourlySales.slice(8,23), backgroundColor: '#10b981' }]
},
options: { responsive: true, maintainAspectRatio: false, plugins: { title: { display: true, text: 'Hourly Sales' }, legend: { display: false } }, scales: { y: { beginAtZero: true } } }
});
};
const renderPOSTerminal = () => {
const posContent = document.getElementById('content-pos-terminal');
if (!posContent) return;
const productGridHtml = appData.products.map(p => `
${p.name}
${formatCurrency(p.price)}
`).join('');
const cartItemsHtml = appData.currentCart.map(item => `
${item.name}
${formatCurrency(item.price)} x ${item.quantity}
${formatCurrency(item.price * item.quantity)}
`).join('');
const subtotal = appData.currentCart.reduce((sum, item) => sum + item.price * item.quantity, 0);
const tax = subtotal * (appData.settings.taxRate / 100);
const total = subtotal + tax;
posContent.innerHTML = `
Current Order
${cartItemsHtml || '
Cart is empty.
'}
Subtotal:${formatCurrency(subtotal)}
Tax (${appData.settings.taxRate}%):${formatCurrency(tax)}
Total:${formatCurrency(total)}
Payment Method
`;
lucide.createIcons();
attachPOSListeners();
};
const renderConfiguration = () => {
const configContent = document.getElementById('content-configuration');
if(!configContent) return;
const productsHtml = appData.products.map(p => `
|
|
|
`).join('');
configContent.innerHTML = `
Product & Store Settings
| Product Name |
Price ($) |
Stock |
${productsHtml}
`;
attachConfigListeners();
};
// --- EVENT HANDLERS & LOGIC ---
const attachPOSListeners = () => {
document.querySelectorAll('.product-card:not(.disabled)').forEach(card => {
card.addEventListener('click', (e) => {
const productId = parseInt(e.currentTarget.id.replace('product-', ''));
addToCart(productId);
});
});
document.querySelectorAll('.payment-btn').forEach(btn => {
btn.addEventListener('click', (e) => {
const method = e.currentTarget.dataset.method;
completeSale(method);
});
});
};
const addToCart = (productId) => {
const product = appData.products.find(p => p.id === productId);
const cartItem = appData.currentCart.find(item => item.id === productId);
if(cartItem) {
cartItem.quantity++;
} else {
appData.currentCart.push({ ...product, quantity: 1 });
}
renderPOSTerminal();
};
const completeSale = (paymentMethod) => {
if(appData.currentCart.length === 0) {
alert('Cart is empty.');
return;
}
const subtotal = appData.currentCart.reduce((sum, item) => sum + item.price * item.quantity, 0);
const tax = subtotal * (appData.settings.taxRate / 100);
const total = subtotal + tax;
appData.transactions.push({
id: Date.now(),
items: [...appData.currentCart],
total,
paymentMethod,
date: new Date().toISOString()
});
appData.currentCart = [];
appData.dashboardData = null; // Invalidate dashboard data
renderPOSTerminal();
alert(`Sale of ${formatCurrency(total)} completed via ${paymentMethod}.`);
calculateDashboardData();
renderDashboard();
};
const attachConfigListeners = () => {
document.querySelectorAll('.config-input').forEach(input => {
input.addEventListener('change', e => {
const id = parseInt(e.target.dataset.id);
const field = e.target.dataset.field;
const value = field === 'name' ? e.target.value : parseFloat(e.target.value);
const product = appData.products.find(p => p.id === id);
if(product) product[field] = value;
// No need to re-render config, but other tabs might need update
renderPOSTerminal();
});
});
};
const generatePdf = () => {
loadingOverlay.style.display = 'flex';
const { jsPDF } = window.jspdf;
document.getElementById('pdf-generated-date').textContent = new Date().toLocaleDateString('en-US');
const pdfHeader = document.getElementById('pdf-header');
pdfHeader.classList.remove('hidden');
const fullContent = document.getElementById('pdf-content-area');
html2canvas(fullContent, { scale: 2, useCORS: true, logging: false, windowWidth: 1200 })
.then(canvas => {
pdfHeader.classList.add('hidden');
const imgData = canvas.toDataURL('image/jpeg', 0.9);
const pdf = new jsPDF({ orientation: 'landscape', 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, 'JPEG', 0, 0, pdfWidth, imgHeight);
pdf.save('POS-Sales-Report.pdf');
loadingOverlay.style.display = 'none';
}).catch(err => {
console.error("PDF generation failed:", err);
pdfHeader.classList.add('hidden');
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: 'Sales Dashboard', id: 'sales-dashboard' },
{ name: 'POS Terminal', id: 'pos-terminal' },
{ name: 'Configuration', id: 'configuration' }
];
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));
});
renderDashboard();
renderPOSTerminal();
renderConfiguration();
switchTab(0);
};
initializeUI();
prevTabBtn.addEventListener('click', () => { if (activeTabIndex > 0) switchTab(activeTabIndex - 1); });
nextTabBtn.addEventListener('click', () => { if (activeTabIndex < tabIdentifiers.length - 1) switchTab(activeTabIndex + 1); });
});
