`;
updateResults();
attachCalculatorListeners();
lucide.createIcons();
};
const updateResults = () => {
const resultsDisplay = document.getElementById('results-display');
if (!resultsDisplay) return;
const result = calculateTax();
resultsDisplay.innerHTML = `
Base Amount
${formatCurrency(result.baseAmount)}
${result.rateInfo.type} (${result.rateInfo.rate}%)
+ ${formatCurrency(result.taxAmount)}
Total Amount Due
`;
};
const attachCalculatorListeners = () => {
const baseAmountInput = document.getElementById('base-amount');
const locationSelect = document.getElementById('location-select');
baseAmountInput.addEventListener('input', e => {
calculatorState.baseAmount = parseFloat(e.target.value) || 0;
updateResults();
});
locationSelect.addEventListener('change', e => {
calculatorState.selectedLocation = e.target.value;
updateResults();
});
document.getElementById('download-pdf-btn').addEventListener('click', generatePdf);
};
const renderDataConfig = () => {
const configContent = document.getElementById('content-config');
if (!configContent) return;
const ratesHtml = appData.taxRates.map((rate, index) => `
`).join('');
configContent.innerHTML = `
Tax Rate Configuration
`;
attachConfigListeners();
lucide.createIcons();
};
const attachConfigListeners = () => {
document.getElementById('add-rate-btn').addEventListener('click', () => {
appData.taxRates.push({ location: '', type: 'Sales Tax', rate: 0 });
renderDataConfig();
});
document.getElementById('rates-container').addEventListener('click', e => {
const removeBtn = e.target.closest('.remove-rate-btn');
if (removeBtn) {
appData.taxRates.splice(parseInt(removeBtn.dataset.index), 1);
renderDataConfig();
}
});
document.getElementById('apply-settings-btn').addEventListener('click', () => {
const newRates = [];
document.querySelectorAll('.rate-row').forEach(row => {
const location = row.querySelector('[data-prop="location"]').value;
const type = row.querySelector('[data-prop="type"]').value;
const rate = parseFloat(row.querySelector('[data-prop="rate"]').value) || 0;
if (location) {
newRates.push({ location, type, rate });
}
});
appData.taxRates = newRates;
if (!appData.taxRates.some(r => r.location === calculatorState.selectedLocation)) {
calculatorState.selectedLocation = appData.taxRates[0]?.location || '';
}
alert('Settings updated!');
renderCalculator();
});
};
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 = 60;
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('Price-Breakdown.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 initializeTabs = () => {
const tabsContainer = document.getElementById('tabs-container');
const prevTabBtn = document.getElementById('prev-tab-btn');
const nextTabBtn = document.getElementById('next-tab-btn');
let activeTabIndex = 0;
const tabs = [
{ name: 'Calculator', id: 'calculator' },
{ name: 'Data Configuration', id: 'config' }
];
tabsContainer.innerHTML = tabs.map(t => `
`).join('');
mainContent.innerHTML = tabs.map(t => `
`).join('');
const tabButtons = tabsContainer.querySelectorAll('.tab-btn');
const tabContents = mainContent.querySelectorAll('.tab-content');
const switchTab = (index) => {
activeTabIndex = index;
tabButtons.forEach((btn, i) => btn.classList.toggle('active', i === index));
tabContents.forEach((content, i) => content.classList.toggle('hidden', i !== index));
prevTabBtn.disabled = activeTabIndex === 0;
nextTabBtn.disabled = activeTabIndex === tabs.length - 1;
};
tabButtons.forEach((btn, index) => btn.addEventListener('click', () => switchTab(index)));
prevTabBtn.addEventListener('click', () => { if (activeTabIndex > 0) switchTab(activeTabIndex - 1); });
nextTabBtn.addEventListener('click', () => { if (activeTabIndex < tabs.length - 1) switchTab(activeTabIndex + 1); });
switchTab(0);
renderCalculator();
renderDataConfig();
};
initializeTabs();
});
