Cost vs. Savings Breakdown
`;
// Render Chart
const chartCtx = document.getElementById('savingsBreakdownChart').getContext('2d');
if (savingsChart) savingsChart.destroy();
savingsChart = new Chart(chartCtx, {
type: 'bar',
data: {
labels: ['Breakdown'],
datasets: [
{ label: 'Final Cost', data: [finalCost], backgroundColor: '#22c55e' /* green-500 */ },
{ label: 'Rebates', data: [totalRebates], backgroundColor: '#f59e0b' /* amber-500 */ },
{ label: 'Cashback', data: [totalCashback], backgroundColor: '#f97316' /* orange-500 */ },
]
},
options: {
responsive: true,
maintainAspectRatio: false,
indexAxis: 'y',
scales: { x: { stacked: true, ticks: { callback: value => formatCurrency(value) } }, y: { stacked: true } },
plugins: { tooltip: { callbacks: { label: (context) => `${context.dataset.label}: ${formatCurrency(context.raw)}` } } }
}
});
document.getElementById('download-pdf-btn').addEventListener('click', generatePdf);
};
const renderItemConfig = () => {
const configContent = document.getElementById('content-item-config');
if (!configContent) return;
let itemsHtml = appData.items.map((item, index) => `
`).join('');
configContent.innerHTML = `
Enter Purchase Details
${itemsHtml}
`;
attachItemConfigListeners();
};
const attachItemConfigListeners = () => {
document.getElementById('add-item-btn').addEventListener('click', () => {
appData.items.push({ name: '', price: 0, rebateType: 'fixed', rebateValue: 0, cashbackRate: 0 });
renderItemConfig();
lucide.createIcons();
});
document.querySelectorAll('.remove-item-btn').forEach(btn => {
btn.addEventListener('click', (e) => {
const index = parseInt(e.currentTarget.dataset.index);
appData.items.splice(index, 1);
renderItemConfig();
lucide.createIcons();
});
});
document.getElementById('calculate-btn').addEventListener('click', handleCalculationUpdate);
};
const handleCalculationUpdate = () => {
const newItems = [];
document.querySelectorAll('.item-row').forEach(row => {
const index = parseInt(row.querySelector('input').dataset.index);
const item = {};
row.querySelectorAll('input, select').forEach(input => {
const field = input.dataset.field;
const value = input.type === 'number' ? parseFloat(input.value) : input.value;
item[field] = value;
});
newItems.push(item);
});
appData.items = newItems;
calculationResult = null; // Force recalculation
renderDashboard();
switchTab(0);
alert('Savings calculation updated!');
};
const generatePdf = () => {
loadingOverlay.style.display = 'flex';
const { jsPDF } = window.jspdf;
const pdfContent = document.getElementById('pdf-content-area');
const pdfHeader = document.getElementById('pdf-header');
document.getElementById('pdf-generated-date').textContent = new Date().toLocaleDateString('en-US', { year: 'numeric', month: 'long', day: 'numeric' });
pdfHeader.classList.remove('hidden');
html2canvas(pdfContent, { scale: 2, useCORS: true, logging: false })
.then(canvas => {
pdfHeader.classList.add('hidden');
const imgData = canvas.toDataURL('image/jpeg', 0.95);
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('Smart-Savings-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: 'Savings Dashboard', id: 'dashboard' },
{ name: 'Item & Offer Configuration', id: 'item-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));
});
renderDashboard();
renderItemConfig();
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); });
});
