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"; } return; } function formatCurrency(value) { return `$${value.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`; } calculateBtn.addEventListener('click', function() { const carPrice = parseFloat(carPriceEl.value); const downPayment = parseFloat(downPaymentEl.value); const termYears = parseInt(loanTermYearsEl.value); const annualInterestRate = parseFloat(interestRateEl.value); let isValid = true; if (isNaN(carPrice) || carPrice <= 0) { alert("Please enter a valid car price."); carPriceEl.focus(); isValid = false; } if (isNaN(downPayment) || downPayment < 0) { alert("Please enter a valid down payment amount (can be $0)."); downPaymentEl.focus(); isValid = false; } if (downPayment >= carPrice) { alert("Down payment must be less than the car price."); downPaymentEl.focus(); isValid = false; } if (isNaN(termYears) || termYears <= 0) { alert("Please select a valid loan term."); loanTermYearsEl.focus(); isValid = false; } if (isNaN(annualInterestRate) || annualInterestRate <= 0 || annualInterestRate > 50) { // 50% sanity cap alert("Please enter a valid annual interest rate (e.g., between 0.1 and 50)."); interestRateEl.focus(); isValid = false; } if (!isValid) { resultsSectionEl.style.display = 'none'; return; } const loanAmount = carPrice - downPayment; const downPaymentPercent = (downPayment / carPrice) * 100; const termMonths = termYears * 12; const monthlyInterestRate = (annualInterestRate / 100) / 12; let monthlyPayment; if (monthlyInterestRate === 0) { // Interest-free loan monthlyPayment = loanAmount / termMonths; } else { monthlyPayment = loanAmount * (monthlyInterestRate * Math.pow(1 + monthlyInterestRate, termMonths)) / (Math.pow(1 + monthlyInterestRate, termMonths) - 1); } const totalLoanCost = monthlyPayment * termMonths; const totalInterestPaid = totalLoanCost - loanAmount; resCarPriceEl.textContent = formatCurrency(carPrice); resDownPaymentEl.textContent = formatCurrency(downPayment); resDownPaymentPercentEl.textContent = `${downPaymentPercent.toFixed(1)}%`; resLoanAmountEl.textContent = formatCurrency(loanAmount); resLoanTermEl.textContent = `${termYears} Years (${termMonths} months)`; resInterestRateEl.textContent = `${annualInterestRate.toFixed(2)}%`; resMonthlyPaymentEl.textContent = formatCurrency(monthlyPayment); resTotalInterestEl.textContent = formatCurrency(totalInterestPaid); resTotalLoanCostEl.textContent = formatCurrency(totalLoanCost); resultsSectionEl.style.display = 'block'; }); pdfDownloadBtn.addEventListener('click', function() { if (typeof window.jspdf === 'undefined' || typeof window.jspdf.jsPDF === 'undefined') { alert("Error: PDF generation library (jsPDF) is not loaded."); console.error("jsPDF is not available."); return; } const { jsPDF } = window.jspdf; const doc = new jsPDF("p", "mm", "a4"); if (resultsSectionEl.style.display === 'none') { alert("Please calculate the estimate first before downloading the PDF."); return; } let yPos = 15; const lineH = 7; // line height const margin = 15; const pageWidth = doc.internal.pageSize.getWidth(); const contentWidth = pageWidth - (2 * margin); function addTitle(text) { doc.setFontSize(16); doc.setFont(undefined, 'bold'); doc.setTextColor(139, 69, 19); // SaddleBrown doc.text(text, pageWidth / 2, yPos, { align: 'center' }); yPos += lineH * 1.5; doc.setTextColor(0,0,0); } function addSubTitle(text) { doc.setFontSize(10); doc.setFont(undefined, 'normal'); doc.text(text, pageWidth / 2, yPos, { align: 'center' }); yPos += lineH * 1.5; } function addSectionTitle(text) { doc.setFontSize(12); doc.setFont(undefined, 'bold'); doc.text(text, margin, yPos); yPos += lineH * 1.2; } function addLineItem(label, value, valueIsBold = false, valueColor = [0,0,0]) { doc.setFontSize(10); doc.setFont(undefined, 'normal'); doc.setTextColor(80,80,80); // Label color doc.text(label, margin + 5, yPos); doc.setFont(undefined, valueIsBold ? 'bold' : 'normal'); doc.setTextColor(valueColor[0], valueColor[1], valueColor[2]); // Simple right alignment for value based on a fixed label width const labelWidthEstimate = 75; // Adjust as needed doc.text(value, margin + labelWidthEstimate, yPos, {align: 'left'}); // Value starts after estimated label space doc.setTextColor(0,0,0); // Reset color yPos += lineH * 0.9; if (yPos > doc.internal.pageSize.getHeight() - 30) { // Basic page break doc.addPage(); yPos = 20; } } function addSeparator() { yPos += lineH * 0.3; doc.setDrawColor(220, 220, 220); // Lighter separator doc.line(margin, yPos, pageWidth - margin, yPos); yPos += lineH * 0.7; } addTitle("Classic Car Financing Estimate"); addSubTitle("Estimated loan details based on your inputs."); yPos += lineH * 0.5; addSectionTitle("Input Summary:"); addLineItem("Car Price / Appraised Value:", resCarPriceEl.textContent); addLineItem("Down Payment Amount:", `${resDownPaymentEl.textContent} (${resDownPaymentPercentEl.textContent})`); addLineItem("Loan Term:", loanTermYearsEl.options[loanTermYearsEl.selectedIndex].text); addLineItem("Annual Interest Rate:", `${interestRateEl.value}%`); yPos += lineH * 0.5; addSeparator(); addSectionTitle("Estimated Loan Breakdown:"); addLineItem("Estimated Loan Amount:", resLoanAmountEl.textContent, true); addLineItem("Estimated Monthly Payment:", resMonthlyPaymentEl.textContent, true, [160, 82, 45]); // Sienna addLineItem("Total Interest Paid (over term):", resTotalInterestEl.textContent, true); addLineItem("Total Cost of Loan (Principal + Interest):", resTotalLoanCostEl.textContent, true); yPos += lineH * 1.5; doc.setFontSize(8); doc.setFont(undefined, 'normal'); const disclaimerText = document.querySelector('#classicCarFinancingEstimatorTool .important-note-ccfe').innerText.replace("Important: ", "").trim(); const disclaimerLines = doc.splitTextToSize(disclaimerText, contentWidth); const rectY = yPos -2; const textStartY = yPos + 2; const rectHeight = (disclaimerLines.length * (doc.getFontSize("normal", 8) * doc.getLineHeightFactor() * 1.15)) + 4; doc.setFillColor(253, 245, 230); // Old Lace / Antique white doc.rect(margin, rectY -1 , contentWidth, rectHeight +1 , 'F'); // 'F' for fill doc.setDrawColor(228, 213, 183); // Tan border doc.rect(margin, rectY -1 , contentWidth, rectHeight +1 , 'S'); // 'S' for stroke doc.setTextColor(84,49,16); // Darker brown text doc.text(disclaimerLines, margin + 2, textStartY); doc.save("classic-car-financing-estimate.pdf"); }); });