/**
* REST API endpoint for analyzing spending trends over time
* This wraps the MCP tool functionality for GPT Actions compatibility
*/
import { NextRequest, NextResponse } from 'next/server';
import { createUSASpendingClient } from '../../../src/clients/usaspending';
import { buildAwardFilters } from '../../../src/builders/filter-builder';
const client = createUSASpendingClient();
export async function POST(request: NextRequest) {
try {
const body = await request.json();
// Build filters using the shared filter builder
const filters = buildAwardFilters({
keywords: body.keywords,
recipientName: body.recipientName,
agencyName: body.agencyName,
naicsCodes: body.naicsCodes,
pscCodes: body.pscCodes,
activityStartDate: body.activityStartDate,
activityEndDate: body.activityEndDate,
});
const result = await client.getSpendingOverTime({
filters,
group: body.group || 'fiscal_year',
});
// Calculate trend direction
const results = result.results || [];
let trendDirection = 'stable';
if (results.length >= 2) {
const first = results[0]?.aggregated_amount || 0;
const last = results[results.length - 1]?.aggregated_amount || 0;
if (last > first * 1.1) {
trendDirection = 'increasing';
} else if (last < first * 0.9) {
trendDirection = 'decreasing';
}
}
return NextResponse.json({
summary: `Spending trends grouped by ${body.group || 'fiscal_year'}`,
group_by: body.group || 'fiscal_year',
trend_direction: trendDirection,
results: results.map((r: any) => ({
time_period: r.time_period,
aggregated_amount: r.aggregated_amount,
})),
});
} catch (error) {
console.error('[API] spending-over-time error:', error);
return NextResponse.json(
{ error: error instanceof Error ? error.message : 'Unknown error' },
{ status: 500 }
);
}
}
// Handle OPTIONS for CORS preflight
export async function OPTIONS() {
return new NextResponse(null, {
status: 204,
headers: {
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Methods': 'POST, OPTIONS',
'Access-Control-Allow-Headers': 'Content-Type',
},
});
}
