import { NextResponse } from "next/server";
import { stripeClient } from "../../../../../lib/stripeClient";

export const runtime = "nodejs";

export async function POST(req: Request) {
  const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET;
  if (!webhookSecret) {
    return NextResponse.json(
      { error: "Missing STRIPE_WEBHOOK_SECRET for V2 thin events." },
      { status: 500 }
    );
  }

  const signature = req.headers.get("stripe-signature");
  if (!signature) {
    return NextResponse.json({ error: "Missing Stripe signature." }, { status: 400 });
  }

  const rawBody = Buffer.from(await req.arrayBuffer());

  try {
    let event: any = null;
    const clientAny = stripeClient as any;

    if (typeof clientAny.parseThinEvent === "function") {
      const thinEvent = clientAny.parseThinEvent(rawBody, signature, webhookSecret);
      // Fetch the full event from Stripe for complete data.
      event = await stripeClient.v2.core.events.retrieve(thinEvent.id);
    } else {
      // Fallback: attempt snapshot parsing if thin parsing isn't available.
      event = stripeClient.webhooks.constructEvent(
        rawBody,
        signature,
        webhookSecret
      );
    }

    switch (event.type) {
      case "v2.core.account[requirements].updated": {
        // TODO: Pull updated requirements and notify the account owner if needed.
        break;
      }
      case "v2.core.account[configuration.merchant].capability_status_updated":
      case "v2.core.account[configuration.customer].capability_status_updated":
      case "v2.core.account[.recipient].capability_status_updated": {
        // TODO: Update capability status in your database.
        break;
      }
      case "setup_intent.created": {
        console.log(
          `[webhook] type=${event.type} id=${event.id} object_id=${event?.data?.object?.id || "n/a"} livemode=${event?.livemode}`
        );
        break;
      }
      default: {
        // Unhandled event type
        break;
      }
    }

    return NextResponse.json({ received: true });
  } catch (err: any) {
    return NextResponse.json(
      { error: err?.message || "Webhook handler failed." },
      { status: 400 }
    );
  }
}