import { NextRequest, NextResponse } from 'next/server';
import { auth } from '@/auth';
import { stripe } from '@/lib/stripe';
import { prisma } from '@/lib/prisma';

export const dynamic = 'force-dynamic';

export async function GET(req: NextRequest) {
  const session = await auth();
  if (!session?.user?.id) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
  }

  const userId = session.user.id;

  try {
    const subscription = await prisma.subscription.findUnique({ where: { userId } });
    if (!subscription?.stripeCustomerId) {
      return NextResponse.json([]);
    }

    const invoices = await stripe.invoices.list({
      customer: subscription.stripeCustomerId,
      limit: 50,
    });

    const formattedInvoices = invoices.data.map((invoice) => ({
      id: invoice.id,
      number: invoice.number,
      amount: invoice.amount_paid || invoice.total,
      currency: invoice.currency,
      status: invoice.status, // 'paid', 'open', 'draft', 'uncollectible', 'void'
      date: invoice.created, // timestamp en secondes
      pdfUrl: invoice.invoice_pdf,
    }));

    return NextResponse.json(formattedInvoices);
  } catch (error) {
    console.error('[billing/invoices]', error);
    return NextResponse.json({ error: 'Failed to fetch invoices' }, { status: 500 });
  }
}