Please enter valid numbers in all fields.

'; return; } let breakdown = {}; // Core Costs breakdown['Residual Value'] = residualValue; const totalRemainingPayments = remainingPayments * monthlyPayment; if (totalRemainingPayments > 0) { breakdown['Remaining Lease Payments'] = totalRemainingPayments; } const subtotal = residualValue + totalRemainingPayments; // Fees & Taxes if (configData.purchaseOptionFee > 0) { breakdown['Purchase Option Fee'] = configData.purchaseOptionFee; } const salesTax = subtotal * (configData.salesTaxRate / 100); breakdown[`Sales Tax (${configData.salesTaxRate}%)`] = salesTax; if (configData.titleRegistrationFee > 0) { breakdown['Title & Registration Fees'] = configData.titleRegistrationFee; } const totalCost = subtotal + configData.purchaseOptionFee + salesTax + configData.titleRegistrationFee; renderResults(totalCost, breakdown); } function renderResults(total, breakdown) { let breakdownHTML = '

'; for (const [key, value] of Object.entries(breakdown)) { breakdownHTML += `
• ${key}$${value.toFixed(2)}
`; } breakdownHTML += '

'; resultsSummary.innerHTML = `

Total Estimated Buyout Price

`; } function renderConfig() { configTbody.innerHTML = ` Purchase Option Fee ($) Sales Tax Rate (%) Title & Registration Fee ($) `; } window.updateConfig = function(element) { const { prop } = element.dataset; const value = parseFloat(element.value); if (isNaN(value)) return; configData[prop] = value; calculateBuyout(); } // --- TAB & NAVIGATION --- window.openTab = function(evt, tabName) { const tabContents = document.getElementsByClassName("tab-content"); Array.from(tabContents).forEach(tab => tab.style.display = "none"); const tabButtons = document.getElementsByClassName("tab-btn"); Array.from(tabButtons).forEach(btn => btn.classList.remove("active")); document.getElementById(tabName).style.display = "block"; if (evt) { evt.currentTarget.classList.add("active"); } else { const btnToActivate = Array.from(tabButtons).find(btn => btn.getAttribute('onclick').includes(`'${tabName}'`)); if (btnToActivate) btnToActivate.classList.add("active"); } updateNavButtons(); } window.navigateTabs = function(direction) { const tabs = Array.from(document.querySelectorAll('.tab-btn')); const activeTabIndex = tabs.findIndex(tab => tab.classList.contains('active')); let newIndex = (direction === 'next') ? (activeTabIndex + 1) % tabs.length : (activeTabIndex - 1 + tabs.length) % tabs.length; tabs[newIndex].click(); } function updateNavButtons() { const tabs = Array.from(document.querySelectorAll('.tab-btn')); const activeTabIndex = tabs.findIndex(tab => tab.classList.contains('active')); document.getElementById('prev-btn').style.visibility = activeTabIndex === 0 ? 'hidden' : 'visible'; document.getElementById('next-btn').style.visibility = activeTabIndex === tabs.length - 1 ? 'hidden' : 'visible'; } // --- PDF DOWNLOAD --- if(downloadPdfBtn) { downloadPdfBtn.addEventListener('click', function() { const { jsPDF } = window.jspdf; const contentToDownload = document.getElementById('results-to-download'); if (!contentToDownload || !document.querySelector('.total-cost')) { console.warn("Please calculate a cost before downloading."); return; } const originalButtonText = downloadPdfBtn.innerHTML; downloadPdfBtn.innerHTML = 'Generating...'; downloadPdfBtn.disabled = true; html2canvas(contentToDownload, { scale: 2, useCORS: true }).then(canvas => { const imgData = canvas.toDataURL('image/png'); const pdf = new jsPDF({ orientation: 'p', unit: 'mm', format: 'a4' }); const pdfWidth = pdf.internal.pageSize.getWidth(); const imgProps = pdf.getImageProperties(imgData); const imgHeight = (imgProps.height * pdfWidth) / imgProps.width; pdf.addImage(imgData, 'PNG', 10, 10, pdfWidth - 20, imgHeight > 0 ? imgHeight - 20 : 0); pdf.save('Lease-Buyout-Estimate.pdf'); }).catch(err => { console.error("Error generating PDF:", err); }).finally(() => { downloadPdfBtn.innerHTML = originalButtonText; downloadPdfBtn.disabled = false; }); }); } // --- INITIALIZATION --- function initializeTool() { calculateBuyout(); renderConfig(); updateNavButtons(); } initializeTool(); });