Most Common Reason
${mostCommonReason}
`;
renderDashboardCharts(reasonsCount);
document.getElementById('download-pdf-btn').addEventListener('click', generatePdf);
};
const renderDashboardCharts = (reasonsCount) => {
const reasonCtx = document.getElementById('chargebacks-by-reason-chart').getContext('2d');
if (charts.reason) charts.reason.destroy();
charts.reason = new Chart(reasonCtx, {
type: 'doughnut',
data: {
labels: Object.keys(reasonsCount),
datasets: [{ data: Object.values(reasonsCount), backgroundColor: ['#ef4444', '#f59e0b', '#facc15', '#84cc16', '#22c55e', '#6b7280'] }]
},
options: { responsive: true, maintainAspectRatio: false, plugins: { title: { display: true, text: 'Chargebacks by Reason' }, legend: { position: 'bottom' } } }
});
const monthCtx = document.getElementById('chargebacks-by-month-chart').getContext('2d');
if (charts.month) charts.month.destroy();
const monthlyData = appData.chargebacks.reduce((acc, cb) => {
const month = new Date(cb.date).toLocaleString('default', { month: 'short', year: 'numeric' });
acc[month] = (acc[month] || 0) + cb.amount;
return acc;
}, {});
const sortedMonths = Object.keys(monthlyData).sort((a,b) => new Date(a) - new Date(b));
charts.month = new Chart(monthCtx, {
type: 'bar',
data: {
labels: sortedMonths,
datasets: [{ label: 'Chargeback Amount', data: sortedMonths.map(m => monthlyData[m]), backgroundColor: '#f87171' }]
},
options: { responsive: true, maintainAspectRatio: false, plugins: { title: { display: true, text: 'Chargeback Amount by Month' }, legend: { display: false } }, scales: { y: { beginAtZero: true } } }
});
};
const renderDataConfig = () => {
const configContent = document.getElementById('content-data-configuration');
if (!configContent) return;
const chargebacksHtml = appData.chargebacks.map(cb => `
|
|
|
|
|
`).join('');
configContent.innerHTML = `
`;
attachConfigListeners();
};
// --- EVENT HANDLERS & LOGIC ---
const attachConfigListeners = () => {
const updateHandler = (e) => {
const id = parseInt(e.target.dataset.id);
const field = e.target.dataset.field;
const value = field === 'amount' ? parseFloat(e.target.value) : e.target.value;
const chargeback = appData.chargebacks.find(cb => cb.id === id);
if (chargeback) chargeback[field] = value;
appData.analysisResults = null;
renderDashboard();
};
document.querySelectorAll('.config-input').forEach(input => input.addEventListener('change', updateHandler));
document.getElementById('total-transactions').addEventListener('change', e => {
appData.settings.totalTransactions = parseInt(e.target.value) || 0;
appData.analysisResults = null;
renderDashboard();
});
document.querySelectorAll('.remove-chargeback-btn').forEach(btn => {
btn.addEventListener('click', e => {
const id = parseInt(e.currentTarget.dataset.id);
appData.chargebacks = appData.chargebacks.filter(cb => cb.id !== id);
appData.analysisResults = null;
renderDataConfig();
renderDashboard();
});
});
document.getElementById('add-chargeback-btn').addEventListener('click', () => {
const newId = appData.chargebacks.length > 0 ? Math.max(...appData.chargebacks.map(cb => cb.id)) + 1 : 1;
appData.chargebacks.push({
id: newId, transactionId: `chg_${Date.now()}`,
date: new Date().toISOString().split('T')[0],
amount: 0, reason: CHARGEBACK_REASONS[0]
});
renderDataConfig();
});
};
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('Chargeback-Analysis-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: 'Chargeback Dashboard', id: 'chargeback-dashboard' },
{ name: 'Data Configuration', id: 'data-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();
renderDataConfig();
switchTab(0);
lucide.createIcons();
};
initializeUI();
prevTabBtn.addEventListener('click', () => { if (activeTabIndex > 0) switchTab(activeTabIndex - 1); });
nextTabBtn.addEventListener('click', () => { if (activeTabIndex < tabIdentifiers.length - 1) switchTab(activeTabIndex + 1); });
});
