MRR Growth Over ${appData.assumptions.projectionMonths} Months
`;
// Render Charts
const mrrCtx = document.getElementById('mrrGrowthChart').getContext('2d');
if (charts.mrr) charts.mrr.destroy();
charts.mrr = new Chart(mrrCtx, {
type: 'line',
data: {
labels: Array.from({ length: appData.assumptions.projectionMonths }, (_, i) => `Month ${i + 1}`),
datasets: [{ label: 'MRR', data: mrrTimeline, borderColor: '#16a34a', backgroundColor: 'rgba(22, 163, 74, 0.1)', fill: true, tension: 0.3 }]
},
options: { responsive: true, maintainAspectRatio: false, scales: { y: { ticks: { callback: value => formatCurrency(value) }}}}
});
const mixCtx = document.getElementById('subscriberMixChart').getContext('2d');
if (charts.mix) charts.mix.destroy();
charts.mix = new Chart(mixCtx, {
type: 'doughnut',
data: {
labels: appData.tiers.map(t => t.name),
datasets: [{ data: subscriberMix, backgroundColor: ['#3b82f6', '#10b981', '#f59e0b', '#8b5cf6'] }]
},
options: { responsive: true, maintainAspectRatio: false, plugins: { legend: { position: 'bottom' }}}
});
document.getElementById('download-pdf-btn').addEventListener('click', generatePdf);
};
const renderTiersConfig = () => {
const configContent = document.getElementById('content-tiers-config');
if (!configContent) return;
let tiersHtml = appData.tiers.map((tier, index) => `
`).join('');
configContent.innerHTML = `
Configure Pricing Tiers
${tiersHtml}
`;
};
const renderAssumptionsConfig = () => {
const configContent = document.getElementById('content-assumptions-config');
if(!configContent) return;
const { assumptions } = appData;
configContent.innerHTML = `
Configure Model Assumptions
${Object.entries({
initialVisitors: { label: 'Starting Monthly Visitors', type: 'number' },
visitorToTrialRate: { label: 'Visitor-to-Trial Rate (%)', type: 'number', step: 0.1 },
trialLength: { label: 'Free Trial Length (days)', type: 'number' },
trialToPaidRate: { label: 'Trial-to-Paid Conversion Rate (%)', type: 'number', step: 0.1 },
monthlyChurnRate: { label: 'Monthly Customer Churn Rate (%)', type: 'number', step: 0.1 },
visitorGrowthRate: { label: 'Month-over-Month Visitor Growth (%)', type: 'number', step: 0.1 },
projectionMonths: { label: 'Projection Period (Months)', type: 'number' },
}).map(([key, {label, type, step}]) => `
`).join('')}
`;
document.getElementById('run-simulation-btn').addEventListener('click', handleConfigUpdate);
};
const handleConfigUpdate = () => {
// Update Assumptions
Object.keys(appData.assumptions).forEach(key => {
const input = document.getElementById(key);
if (input) appData.assumptions[key] = parseFloat(input.value) || 0;
});
// Update Tiers
document.querySelectorAll('#tiers-container > div').forEach((tierEl, index) => {
tierEl.querySelectorAll('input').forEach(input => {
const field = input.dataset.field;
const value = input.type === 'number' ? parseFloat(input.value) : input.value;
appData.tiers[index][field] = value;
});
});
simulationResult = null; // Force recalculation
renderDashboard();
alert('Model updated successfully!');
switchTab(0);
};
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', { year: 'numeric', month: 'long', day: 'numeric' });
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('Subscription-Model-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: 'Dashboard', id: 'dashboard' },
{ name: 'Pricing Tiers', id: 'tiers-config' },
{ name: 'Model Assumptions', id: 'assumptions-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();
renderTiersConfig();
renderAssumptionsConfig();
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); });
});
