import { NextResponse } from 'next/server';
import { auth } from '@/auth';
import { getUserInfo, getEffectiveTier } from '@/lib/entitlements';

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

  const userId = session.user.id;

  try {
    const { tier, status, currentPeriodEnd } = await getUserInfo(userId);
    const effectiveTier = await getEffectiveTier(userId);

    const { prisma } = await import('@/lib/prisma');
    const subscription = await prisma.subscription.findUnique({ where: { userId } });

    return NextResponse.json({
      tier,
      effectiveTier,
      status,
      currentPeriodEnd: currentPeriodEnd ?? null,
      currentPeriodStart: subscription?.currentPeriodStart ?? null,
      cancelAtPeriodEnd: subscription?.cancelAtPeriodEnd ?? false,
      hasStripeSubscription: !!subscription?.stripeSubscriptionId,
    });
  } catch (error) {
    console.error('[billing/status]', error);
    return NextResponse.json({ error: 'Failed to fetch billing status' }, { status: 500 });
  }
}