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* Report Generation Service
*
* Generates analytics reports in various formats:
* - JSON for API consumption
* - CSV for spreadsheet export
* - HTML for email digests
*/
import { logger } from "@/lib/logging";
import { format } from "date-fns";
import { getRevenueMetrics, getRevenueTrend, getRevenueByCategory, getTopProductsByRevenue } from "./revenue.service";
import { getCohortAnalysis, getCustomerSegments } from "./cohort.service";
export interface ReportData {
generatedAt: string;
period: {
start: string;
end: string;
};
revenue: {
today: number;
yesterday: number;
thisWeek: number;
lastWeek: number;
thisMonth: number;
lastMonth: number;
trend: number;
averageOrderValue: number;
totalOrders: number;
};
revenueTrend: Array<{
date: string;
revenue: number;
orders: number;
averageOrderValue: number;
}>;
categoryRevenue: Array<{
categoryId: string;
categoryName: string;
revenue: number;
orders: number;
percentage: number;
}>;
topProducts: Array<{
productId: string;
productName: string;
revenue: number;
unitsSold: number;
percentage: number;
}>;
customerSegments: {
high: { count: number; revenue: number; avgOrderValue: number };
medium: { count: number; revenue: number; avgOrderValue: number };
low: { count: number; revenue: number; avgOrderValue: number };
dormant: { count: number; lastOrderDaysAgo: number };
};
cohortSummary: {
totalUsers: number;
averageCLV: number;
averageRetention: number[];
};
}
export type ReportFormat = "json" | "csv" | "html";
/**
* Generate comprehensive analytics report
*
* @param startDate - Report start date
* @param endDate - Report end date
* @param outputFormat - Output format
*/
export async function generateAnalyticsReport(
startDate: Date,
endDate: Date,
outputFormat: ReportFormat = "json"
): Promise<string | ReportData> {
logger.info(`Generating ${outputFormat} report from ${startDate.toISOString()} to ${endDate.toISOString()}`, { category: "ANALYTICS", outputFormat, startDate: startDate.toISOString(), endDate: endDate.toISOString() });
const daysDiff = Math.ceil((endDate.getTime() - startDate.getTime()) / (1000 * 60 * 60 * 24));
// Fetch all data in parallel
const [
revenueMetrics,
revenueTrend,
categoryRevenue,
topProducts,
customerSegments,
cohortAnalysis,
] = await Promise.all([
getRevenueMetrics(),
getRevenueTrend(daysDiff),
getRevenueByCategory(daysDiff),
getTopProductsByRevenue(daysDiff),
getCustomerSegments(),
getCohortAnalysis(6),
]);
const reportData: ReportData = {
generatedAt: new Date().toISOString(),
period: {
start: startDate.toISOString(),
end: endDate.toISOString(),
},
revenue: revenueMetrics,
revenueTrend,
categoryRevenue,
topProducts,
customerSegments,
cohortSummary: {
totalUsers: cohortAnalysis.totalUsers,
averageCLV: cohortAnalysis.averageCLV,
averageRetention: cohortAnalysis.averageRetention,
},
};
switch (outputFormat) {
case "csv":
return convertToCSV(reportData);
case "html":
return convertToHTML(reportData);
default:
return reportData;
}
}
/**
* Convert report data to CSV format
*/
function convertToCSV(data: ReportData): string {
const lines: string[] = [];
// Header
lines.push("Analytics Report");
lines.push(`Generated: ${data.generatedAt}`);
lines.push(`Period: ${data.period.start} to ${data.period.end}`);
lines.push("");
// Revenue Summary
lines.push("=== Revenue Summary ===");
lines.push("Metric,Value");
lines.push(`Today,$${data.revenue.today}`);
lines.push(`Yesterday,$${data.revenue.yesterday}`);
lines.push(`This Week,$${data.revenue.thisWeek}`);
lines.push(`Last Week,$${data.revenue.lastWeek}`);
lines.push(`This Month,$${data.revenue.thisMonth}`);
lines.push(`Last Month,$${data.revenue.lastMonth}`);
lines.push(`Week-over-Week Trend,${data.revenue.trend}%`);
lines.push(`Average Order Value,$${data.revenue.averageOrderValue}`);
lines.push(`Total Orders,${data.revenue.totalOrders}`);
lines.push("");
// Revenue Trend
lines.push("=== Daily Revenue Trend ===");
lines.push("Date,Revenue,Orders,AOV");
for (const day of data.revenueTrend) {
lines.push(`${day.date},$${day.revenue},${day.orders},$${day.averageOrderValue}`);
}
lines.push("");
// Category Revenue
lines.push("=== Revenue by Category ===");
lines.push("Category,Revenue,Orders,% of Total");
for (const cat of data.categoryRevenue) {
lines.push(`${cat.categoryName},$${cat.revenue},${cat.orders},${cat.percentage}%`);
}
lines.push("");
// Top Products
lines.push("=== Top Products ===");
lines.push("Product,Revenue,Units Sold,% of Total");
for (const prod of data.topProducts) {
lines.push(`"${prod.productName}",$${prod.revenue},${prod.unitsSold},${prod.percentage}%`);
}
lines.push("");
// Customer Segments
lines.push("=== Customer Segments ===");
lines.push("Segment,Count,Total Revenue,Avg Order Value");
lines.push(`High Value,${data.customerSegments.high.count},$${data.customerSegments.high.revenue},$${data.customerSegments.high.avgOrderValue}`);
lines.push(`Medium Value,${data.customerSegments.medium.count},$${data.customerSegments.medium.revenue},$${data.customerSegments.medium.avgOrderValue}`);
lines.push(`Low Value,${data.customerSegments.low.count},$${data.customerSegments.low.revenue},$${data.customerSegments.low.avgOrderValue}`);
lines.push(`Dormant (${data.customerSegments.dormant.lastOrderDaysAgo}+ days),${data.customerSegments.dormant.count},-,-`);
lines.push("");
// Cohort Summary
lines.push("=== Cohort Summary ===");
lines.push(`Total Users,${data.cohortSummary.totalUsers}`);
lines.push(`Average CLV,$${data.cohortSummary.averageCLV}`);
if (data.cohortSummary.averageRetention.length > 0) {
lines.push(`Month 1 Retention,${data.cohortSummary.averageRetention[0]}%`);
}
return lines.join("\n");
}
/**
* Convert report data to HTML format for email digests
*/
function convertToHTML(data: ReportData): string {
const formatCurrency = (value: number) => `$${value.toFixed(2)}`;
const formatDate = (dateStr: string) => format(new Date(dateStr), "MMM d, yyyy");
return `
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Analytics Report</title>
<style>
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; margin: 0; padding: 20px; background: #f5f5f5; }
.container { max-width: 800px; margin: 0 auto; background: white; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
.header { background: #1e3a8a; color: white; padding: 24px; }
.header h1 { margin: 0 0 8px 0; font-size: 24px; }
.header p { margin: 0; opacity: 0.8; font-size: 14px; }
.content { padding: 24px; }
.section { margin-bottom: 32px; }
.section h2 { font-size: 18px; color: #1e3a8a; margin: 0 0 16px 0; padding-bottom: 8px; border-bottom: 2px solid #e5e7eb; }
.metrics-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.metric-card { background: #f9fafb; padding: 16px; border-radius: 8px; text-align: center; }
.metric-value { font-size: 24px; font-weight: bold; color: #1e3a8a; }
.metric-label { font-size: 12px; color: #6b7280; margin-top: 4px; }
.metric-change { font-size: 12px; margin-top: 4px; }
.metric-change.positive { color: #10b981; }
.metric-change.negative { color: #ef4444; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid #e5e7eb; }
th { background: #f9fafb; font-weight: 600; color: #374151; font-size: 12px; text-transform: uppercase; }
td { font-size: 14px; color: #4b5563; }
.text-right { text-align: right; }
.footer { background: #f9fafb; padding: 16px 24px; text-align: center; font-size: 12px; color: #6b7280; }
</style>
</head>
<body>
<div class="container">
<div class="header">
<h1>📊 Analytics Report</h1>
<p>Generated on ${formatDate(data.generatedAt)} | Period: ${formatDate(data.period.start)} - ${formatDate(data.period.end)}</p>
</div>
<div class="content">
<div class="section">
<h2>💰 Revenue Overview</h2>
<div class="metrics-grid">
<div class="metric-card">
<div class="metric-value">${formatCurrency(data.revenue.today)}</div>
<div class="metric-label">Today</div>
</div>
<div class="metric-card">
<div class="metric-value">${formatCurrency(data.revenue.thisWeek)}</div>
<div class="metric-label">This Week</div>
<div class="metric-change ${data.revenue.trend >= 0 ? "positive" : "negative"}">
${data.revenue.trend >= 0 ? "↑" : "↓"} ${Math.abs(data.revenue.trend)}% vs last week
</div>
</div>
<div class="metric-card">
<div class="metric-value">${formatCurrency(data.revenue.thisMonth)}</div>
<div class="metric-label">This Month</div>
</div>
</div>
<div class="metrics-grid" style="margin-top: 16px;">
<div class="metric-card">
<div class="metric-value">${data.revenue.totalOrders}</div>
<div class="metric-label">Total Orders</div>
</div>
<div class="metric-card">
<div class="metric-value">${formatCurrency(data.revenue.averageOrderValue)}</div>
<div class="metric-label">Avg Order Value</div>
</div>
<div class="metric-card">
<div class="metric-value">${data.cohortSummary.totalUsers}</div>
<div class="metric-label">Total Customers</div>
</div>
</div>
</div>
<div class="section">
<h2>📦 Top Categories</h2>
<table>
<thead>
<tr>
<th>Category</th>
<th class="text-right">Revenue</th>
<th class="text-right">Orders</th>
<th class="text-right">% of Total</th>
</tr>
</thead>
<tbody>
${data.categoryRevenue.slice(0, 5).map((cat) => `
<tr>
<td>${cat.categoryName}</td>
<td class="text-right">${formatCurrency(cat.revenue)}</td>
<td class="text-right">${cat.orders}</td>
<td class="text-right">${cat.percentage}%</td>
</tr>
`).join("")}
</tbody>
</table>
</div>
<div class="section">
<h2>⭐ Top Products</h2>
<table>
<thead>
<tr>
<th>Product</th>
<th class="text-right">Revenue</th>
<th class="text-right">Units Sold</th>
<th class="text-right">% of Total</th>
</tr>
</thead>
<tbody>
${data.topProducts.slice(0, 5).map((prod) => `
<tr>
<td>${prod.productName}</td>
<td class="text-right">${formatCurrency(prod.revenue)}</td>
<td class="text-right">${prod.unitsSold}</td>
<td class="text-right">${prod.percentage}%</td>
</tr>
`).join("")}
</tbody>
</table>
</div>
<div class="section">
<h2>👥 Customer Segments</h2>
<div class="metrics-grid">
<div class="metric-card">
<div class="metric-value">${data.customerSegments.high.count}</div>
<div class="metric-label">High Value</div>
<div style="font-size: 12px; color: #10b981; margin-top: 4px;">
${formatCurrency(data.customerSegments.high.revenue)} total
</div>
</div>
<div class="metric-card">
<div class="metric-value">${data.customerSegments.medium.count}</div>
<div class="metric-label">Medium Value</div>
<div style="font-size: 12px; color: #3b82f6; margin-top: 4px;">
${formatCurrency(data.customerSegments.medium.revenue)} total
</div>
</div>
<div class="metric-card">
<div class="metric-value">${data.customerSegments.low.count}</div>
<div class="metric-label">Low Value</div>
<div style="font-size: 12px; color: #6b7280; margin-top: 4px;">
${formatCurrency(data.customerSegments.low.revenue)} total
</div>
</div>
</div>
${data.customerSegments.dormant.count > 0 ? `
<p style="margin-top: 16px; padding: 12px; background: #fef3c7; border-radius: 8px; font-size: 14px; color: #92400e;">
⚠️ <strong>${data.customerSegments.dormant.count} dormant customers</strong>
haven't ordered in ${data.customerSegments.dormant.lastOrderDaysAgo}+ days on average.
Consider a re-engagement campaign!
</p>
` : ""}
</div>
</div>
<div class="footer">
<p>This report was automatically generated. View the full dashboard for more insights.</p>
</div>
</div>
</body>
</html>
`.trim();
}
/**
* Schedule weekly report email
*
* This would be called by a cron job
*/
export async function scheduleWeeklyReport(adminEmails: string[]): Promise<void> {
logger.info(`Scheduling weekly report for ${adminEmails.length} admins`, { category: "ANALYTICS", recipientCount: adminEmails.length });
const now = new Date();
const lastWeek = new Date(now.getTime() - 7 * 24 * 60 * 60 * 1000);
const htmlReport = await generateAnalyticsReport(lastWeek, now, "html");
// In a real implementation, this would use the email service
logger.info("Weekly report generated", {
category: "ANALYTICS",
recipients: adminEmails.length,
reportSize: typeof htmlReport === "string" ? htmlReport.length : 0,
});
// TODO: Integrate with email service (Plan 61)
// await sendEmail({
// to: adminEmails,
// subject: `Weekly Analytics Report - ${format(now, 'MMM d, yyyy')}`,
// html: htmlReport as string,
// });
}
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