Could not calculate. Please check your configuration.
`;
return;
}
resultsDisplay.innerHTML = `
Initial Sale Amount
${formatCurrency(result.saleAmount, result.baseCurrency)}
Customer Pays
${formatCurrency(result.customerAmount, result.customerCurrency)}
Rate: 1 ${result.baseCurrency} = ${result.exchangeRate.toFixed(2)} ${result.customerCurrency}
Transaction Fee
${formatCurrency(result.totalFee, result.baseCurrency)}
${appData.transactionFee.percentage}% + ${formatCurrency(appData.transactionFee.fixed, appData.baseCurrency)}
`;
};
const attachCalculatorListeners = () => {
document.getElementById('sale-amount').addEventListener('input', (e) => {
calculatorState.saleAmount = parseFloat(e.target.value) || 0;
updateResults();
});
document.getElementById('customer-currency').addEventListener('change', (e) => {
calculatorState.customerCurrency = e.target.value;
updateResults();
});
document.getElementById('download-pdf-btn').addEventListener('click', generatePdf);
};
const renderDataConfig = () => {
const configContent = document.getElementById('content-data-config');
if (!configContent) return;
let ratesHtml = appData.exchangeRates.map((rate, index) => `
`).join('');
configContent.innerHTML = `
`;
attachConfigListeners();
};
const attachConfigListeners = () => {
document.getElementById('add-rate-btn').addEventListener('click', () => {
const container = document.getElementById('rates-container');
const newRow = document.createElement('div');
newRow.className = 'rate-row grid grid-cols-3 gap-4 items-center';
newRow.innerHTML = `
`;
container.appendChild(newRow);
lucide.createIcons();
});
document.getElementById('rates-container').addEventListener('click', (e) => {
if (e.target.closest('.remove-rate-btn')) {
e.target.closest('.rate-row').remove();
}
});
document.getElementById('apply-btn').addEventListener('click', () => {
appData.baseCurrency = document.getElementById('base-currency').value.toUpperCase();
appData.transactionFee.percentage = parseFloat(document.getElementById('fee-percentage').value);
appData.transactionFee.fixed = parseFloat(document.getElementById('fee-fixed').value);
const newRates = [];
document.querySelectorAll('.rate-row').forEach(row => {
const currency = row.querySelector('.currency-code').value.toUpperCase();
const rate = parseFloat(row.querySelector('.exchange-rate').value);
if (currency && !isNaN(rate)) {
newRates.push({ currency, rate });
}
});
appData.exchangeRates = newRates;
// Update default selection if old one was removed
if (!appData.exchangeRates.some(r => r.currency === calculatorState.customerCurrency) && appData.exchangeRates.length > 0) {
calculatorState.customerCurrency = appData.exchangeRates[0].currency;
}
alert('Settings updated!');
renderCalculator();
lucide.createIcons();
});
};
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');
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: 'portrait', unit: 'px', format: 'a4' });
const pdfWidth = pdf.internal.pageSize.getWidth();
const pageMargin = 40;
const contentWidth = pdfWidth - (pageMargin * 2);
const imgProps = pdf.getImageProperties(imgData);
const imgHeight = (imgProps.height * contentWidth) / imgProps.width;
pdf.addImage(imgData, 'JPEG', pageMargin, pageMargin, contentWidth, imgHeight);
pdf.save('Payment-Calculation-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: 'Calculator', id: 'calculator' },
{ name: 'Data Configuration', id: 'data-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));
});
renderCalculator();
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); });
});
