Total Units Produced
${metrics.totalUnits.toLocaleString()}
Average Cost Per Unit
$${metrics.avgCostPerUnit.toLocaleString(undefined, {minimumFractionDigits: 2})}
Total Batches
${metrics.processedBatches.length}
`;
// Render Table
const tableBody = trackerPane.querySelector('#batch-table-body') || document.createElement('tbody');
tableBody.innerHTML = metrics.processedBatches.map(batch => `
| ${batch.batchId} |
${batch.productName} |
${batch.unitsProduced.toLocaleString()} |
$${batch.materialCost.toLocaleString(undefined, {minimumFractionDigits: 2})} |
$${batch.laborCost.toLocaleString(undefined, {minimumFractionDigits: 2})} |
$${batch.overheadCost.toLocaleString(undefined, {minimumFractionDigits: 2})} |
$${batch.totalBatchCost.toLocaleString(undefined, {minimumFractionDigits: 2})} |
$${batch.costPerUnit.toLocaleString(undefined, {minimumFractionDigits: 2})} |
`).join('');
renderChartsForTab('tracker');
};
const renderConfigTab = () => {
const configPane = document.getElementById('config-tab');
if(!configPane) return;
configPane.innerHTML = `
Configure Production Data
Edit the JSON data for production batches below.
Error:
`;
document.getElementById('data-config-input').value = JSON.stringify(costData, null, 2);
document.getElementById('update-dashboard-btn').addEventListener('click', handleUpdateDashboard);
};
// --- CHART RENDERING ---
const renderChartsForTab = (tabId) => {
if (tabId !== 'tracker') return;
destroyCharts();
const metrics = processData();
chartInstances.doughnut = new Chart(document.getElementById('doughnut-chart').getContext('2d'), {
type: 'doughnut',
data: {
labels: ['Total Material Cost', 'Total Labor Cost', 'Total Overhead Cost'],
datasets: [{
data: [metrics.totalMaterial, metrics.totalLabor, metrics.totalOverhead],
backgroundColor: ['#3b82f6', '#16a34a', '#f97316']
}]
},
options: { responsive: true, maintainAspectRatio: true }
});
chartInstances.line = new Chart(document.getElementById('line-chart').getContext('2d'), {
type: 'line',
data: {
labels: metrics.processedBatches.map(b => b.batchId),
datasets: [{
label: 'Cost Per Unit ($)',
data: metrics.processedBatches.map(b => b.costPerUnit),
borderColor: 'rgba(14, 165, 233, 1)',
backgroundColor: 'rgba(56, 189, 248, 0.2)',
fill: true,
tension: 0.1
}]
},
options: { responsive: true, maintainAspectRatio: true, scales: { y: { beginAtZero: true } } }
});
};
// --- NAVIGATION & EVENT HANDLING ---
const showTab = (tabIndex) => {
currentTab = tabIndex;
const tabId = tabs[tabIndex];
document.querySelectorAll('.tab-pane').forEach(pane => pane.classList.add('hidden'));
document.getElementById(`${tabId}-tab`).classList.remove('hidden');
document.querySelectorAll('.tab-btn').forEach(btn => btn.classList.remove('active'));
document.querySelector(`.tab-btn[data-tab='${tabId}']`).classList.add('active');
prevBtn.style.visibility = (currentTab === 0) ? 'hidden' : 'visible';
nextBtn.style.visibility = (currentTab >= tabs.length - 2) ? 'hidden' : 'visible';
downloadPdfBtn.style.visibility = (tabId === 'config') ? 'hidden' : 'visible';
if (tabId === 'tracker') {
renderTrackerTab();
}
};
tabNavigation.addEventListener('click', (e) => {
if (e.target.matches('.tab-btn')) {
const tabId = e.target.dataset.tab;
const tabIndex = tabs.indexOf(tabId);
showTab(tabIndex);
}
});
nextBtn.addEventListener('click', () => {
if (currentTab < tabs.length - 1) showTab(currentTab + 1);
});
prevBtn.addEventListener('click', () => {
if (currentTab > 0) showTab(currentTab - 1);
});
const handleUpdateDashboard = () => {
const configInput = document.getElementById('data-config-input');
const errorDiv = document.getElementById('json-error');
const errorMessage = document.getElementById('json-error-message');
try {
const newData = JSON.parse(configInput.value);
costData = newData;
errorDiv.classList.add('hidden');
renderTrackerTab();
alert('Dashboard updated successfully!');
showTab(0);
} catch (error) {
errorMessage.textContent = 'Invalid JSON format. ' + error.message;
errorDiv.classList.remove('hidden');
}
};
// --- PDF GENERATION ---
downloadPdfBtn.addEventListener('click', () => {
const { jsPDF } = window.jspdf;
const pdfContainer = document.getElementById('pdf-content-container');
const activeTabElement = document.getElementById('tracker-tab');
if (!pdfContainer || !activeTabElement) return;
const clone = activeTabElement.cloneNode(true);
pdfContainer.innerHTML = '';
pdfContainer.appendChild(clone);
html2canvas(pdfContainer, { scale: 2, useCORS: true, logging: false, width: pdfContainer.scrollWidth, height: pdfContainer.scrollHeight })
.then(canvas => {
const imgData = canvas.toDataURL('image/png');
const pdf = new jsPDF({ orientation: 'landscape', unit: 'pt', format: 'a4' });
const pdfWidth = pdf.internal.pageSize.getWidth();
const pdfHeight = pdf.internal.pageSize.getHeight();
const imgWidth = canvas.width;
const imgHeight = canvas.height;
const ratio = imgWidth / imgHeight;
let finalImgHeight = pdfWidth / ratio;
let heightLeft = finalImgHeight;
let position = 0;
pdf.text(`Manufacturing Production Cost Report`, 40, 40);
pdf.addImage(imgData, 'PNG', 0, 60, pdfWidth, finalImgHeight);
heightLeft -= (pdfHeight - 60);
while (heightLeft > 0) {
position = heightLeft - finalImgHeight;
pdf.addPage();
pdf.addImage(imgData, 'PNG', 0, position, pdfWidth, finalImgHeight);
heightLeft -= pdfHeight;
}
pdf.save(`Production_Cost_Tracker_Report.pdf`);
pdfContainer.innerHTML = '';
}).catch(err => {
console.error("PDF generation failed:", err);
alert("Sorry, there was an error creating the PDF.");
});
});
// --- INITIALIZATION ---
createTabs();
renderAllTabs();
showTab(0);
});
