`; const ctx = getElem('riskChart').getContext('2d'); if (riskChart) riskChart.destroy(); riskChart = new Chart(ctx, { type: 'doughnut', data: { labels: ['Low Risk', 'Medium Risk', 'High Risk'], datasets: [{ data: [currentData.riskCounts.Low, currentData.riskCounts.Medium, currentData.riskCounts.High], backgroundColor: ['#22C55E', '#F59E0B', '#EF4444'], }] }, options: { responsive: true, maintainAspectRatio: false, cutout: '50%' } }); downloadSection.classList.remove('hidden'); showTab(1); }; analyzeBtn.addEventListener('click', analyzeTransactions); // --- PDF DOWNLOAD --- const downloadPDF = () => { if (!currentData) return; const { jsPDF } = window.jspdf; const pdf = new jsPDF({ orientation: 'portrait', unit: 'pt', format: 'a4' }); const btnText = getElem('pdf-btn-text'); const btnSpinner = getElem('pdf-btn-spinner'); btnText.classList.add('hidden'); btnSpinner.classList.remove('hidden'); downloadPdfBtn.disabled = true; try { const pageWidth = pdf.internal.pageSize.getWidth(); const margin = 40; let y = margin; pdf.setFont('helvetica', 'bold'); pdf.setFontSize(22); pdf.text("Chargeback Analysis Report", pageWidth / 2, y, { align: 'center' }); y += 15; pdf.setFont('helvetica', 'normal'); pdf.setFontSize(10); pdf.text(`Report Date: ${today.toLocaleDateString('en-US')}`, pageWidth / 2, y, { align: 'center' }); y += 35; pdf.autoTable({ startY: y, theme: 'grid', head: [['Metric', 'Value']], body: [ ['Total Transactions Analyzed', `${currentData.results.length}`], ['High-Risk Transactions Flagged', { content: `${currentData.highRiskCount}`, styles: {textColor: '#DC2626', fontStyle: 'bold'} }], ['Potential Savings from Blocked Transactions', `$${currentData.potentialSaved.toLocaleString('en-US')}`], ], didDrawPage: (data) => { y = data.cursor.y; } }); y += 20; pdf.setFont('helvetica', 'bold'); pdf.text("High-Risk Transactions Flagged for Review", margin, y); y += 15; const tableData = currentData.results.filter(r => r.riskLevel === 'High').map(r => [r.name, `$${r.amount.toFixed(2)}`, r.location, r.reasons]); if (tableData.length > 0) { pdf.autoTable({ startY: y, head: [['Customer', 'Amount', 'Location', 'Risk Factors']], body: tableData, theme: 'striped', headStyles: { fillColor: [220, 38, 38] }, // red-600 }); } else { pdf.setFont('helvetica', 'italic'); pdf.text("No high-risk transactions were identified in this batch.", margin, y); } pdf.save(`Chargeback-Analysis-Report.pdf`); } catch(e) { console.error("PDF Generation failed:", e); } finally { btnText.classList.remove('hidden'); btnSpinner.classList.add('hidden'); downloadPdfBtn.disabled = false; } }; downloadPdfBtn.addEventListener('click', downloadPDF); initialize(); });