`;
}
dashboardContent.innerHTML = dashboardHtml;
if (bestOption) {
const chartCtx = document.getElementById('costComparisonChart').getContext('2d');
if (charts.cost) charts.cost.destroy();
charts.cost = new Chart(chartCtx, {
type: 'bar',
data: {
labels: allOptions.map(opt => opt.name),
datasets: [
{ label: 'Shipping Cost', data: allOptions.map(opt => opt.shippingCost), backgroundColor: '#2dd4bf' },
{ label: 'Handling Cost', data: allOptions.map(opt => opt.handlingCost), backgroundColor: '#99f6e4' }
]
},
options: { responsive: true, maintainAspectRatio: false, scales: { x: { stacked: true }, y: { stacked: true, beginAtZero: true, ticks: { callback: value => formatCurrency(value) } } }, plugins: { tooltip: { callbacks: { label: c => `${c.dataset.label}: ${formatCurrency(c.raw)}` } } } }
});
document.getElementById('download-pdf-btn').addEventListener('click', generatePdf);
}
};
const renderDataConfig = () => {
const configContent = document.getElementById('content-data-config');
if (!configContent) return;
const carriersHtml = appData.carriers.map((carrier, index) => `
`).join('');
configContent.innerHTML = `
`;
attachConfigListeners();
};
const attachConfigListeners = () => {
document.getElementById('add-carrier-btn').addEventListener('click', () => {
appData.carriers.push({ name: 'New Carrier', ratePerPoundPerZone: [0,0,0,0,0,0,0,0,0] });
renderDataConfig();
lucide.createIcons();
});
document.getElementById('carriers-container').addEventListener('click', e => {
if (e.target.closest('.remove-carrier-btn')) {
appData.carriers.splice(parseInt(e.target.closest('.remove-carrier-btn').dataset.index), 1);
renderDataConfig();
lucide.createIcons();
}
});
document.getElementById('update-data-btn').addEventListener('click', handleConfigUpdate);
};
const handleConfigUpdate = () => {
appData.package.weight = parseFloat(document.getElementById('pkg-weight').value) || 0;
appData.package.length = parseFloat(document.getElementById('pkg-length').value) || 0;
appData.package.width = parseFloat(document.getElementById('pkg-width').value) || 0;
appData.package.height = parseFloat(document.getElementById('pkg-height').value) || 0;
appData.package.destinationZone = parseInt(document.getElementById('pkg-zone').value) || 1;
appData.handling.costPerOrder = parseFloat(document.getElementById('handling-per-order').value) || 0;
appData.handling.costPerPound = parseFloat(document.getElementById('handling-per-pound').value) || 0;
appData.carriers = Array.from(document.querySelectorAll('.carrier-row')).map((row, index) => {
const name = row.querySelector('[data-field="name"]').value;
const rates = [0];
row.querySelectorAll('input[data-zone]').forEach(input => {
rates[parseInt(input.dataset.zone)] = parseFloat(input.value) || 0;
});
return { name, ratePerPoundPerZone: rates };
});
optimizationResult = null; // Invalidate old result
renderDashboard();
alert('Configuration saved & costs re-optimized!');
switchTab(0);
};
const generatePdf = () => {
if (!optimizationResult) return;
loadingOverlay.style.display = 'flex';
const { jsPDF } = window.jspdf;
const pdfContent = document.getElementById('pdf-content-area');
const pdfHeader = document.getElementById('pdf-header');
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: '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('Shipping-Cost-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: 'Optimization Dashboard', id: 'dashboard' },
{ name: 'Cost 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));
});
renderDashboard();
renderDataConfig();
switchTab(0);
};
initializeUI();
lucide.createIcons();
prevTabBtn.addEventListener('click', () => { if (activeTabIndex > 0) switchTab(activeTabIndex - 1); });
nextTabBtn.addEventListener('click', () => { if (activeTabIndex < tabIdentifiers.length - 1) switchTab(activeTabIndex + 1); });
});
