import { NextResponse } from "next/server";
import { auth } from "@/auth";
import { prisma } from "@/lib/prisma";
import { getStripe } from "@/lib/stripe";

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

    const subscription = await prisma.subscription.findUnique({
      where: { userId: session.user.id },
      select: { stripeCustomerId: true },
    });

    if (!subscription?.stripeCustomerId) {
      return NextResponse.json(
        { error: "No active subscription to manage" },
        { status: 400 }
      );
    }

    const ALLOWED_ORIGINS = [
      "https://agentlens.vectry.tech",
      "http://localhost:3000",
    ];
    const requestOrigin = request.headers.get("origin");
    const origin = ALLOWED_ORIGINS.includes(requestOrigin ?? "")
      ? requestOrigin!
      : "https://agentlens.vectry.tech";

    const portalSession = await getStripe().billingPortal.sessions.create({
      customer: subscription.stripeCustomerId,
      return_url: `${origin}/dashboard/settings`,
    });

    return NextResponse.json({ url: portalSession.url }, { status: 200 });
  } catch (error) {
    console.error("Error creating portal session:", error);
    return NextResponse.json(
      { error: "Internal server error" },
      { status: 500 }
    );
  }
}
