export const runtime = "nodejs";

import { NextRequest, NextResponse } from "next/server";
import { capturePayPalOrder } from "@/lib/paypal";
import { findByPaypalOrderId, markPaymentPaid } from "@/lib/summit-requests";

interface CaptureBody {
  token: string;   // PayPal Order ID (from query param after redirect)
  PayerID: string;
}

export async function POST(req: NextRequest): Promise<NextResponse> {
  let body: CaptureBody;

  try {
    body = (await req.json()) as CaptureBody;
  } catch {
    return NextResponse.json({ error: "Invalid JSON body." }, { status: 400 });
  }

  // Validate required fields
  if (!body.token || !body.PayerID) {
    return NextResponse.json(
      { error: "token and PayerID are required." },
      { status: 400 }
    );
  }

  const { token, PayerID } = body;
  console.log(`[capture] Received capture request for orderId=${token} PayerID=${PayerID}`);

  // Look up the registration by PayPal Order ID
  const registration = await findByPaypalOrderId(token);

  if (!registration || registration.paymentStatus !== "payment_pending") {
    console.log(
      `[capture] Order not found or not in payment_pending state: orderId=${token} paymentStatus=${registration?.paymentStatus ?? "not found"}`
    );
    return NextResponse.json(
      { error: "Order not found or not in payment_pending state." },
      { status: 409 }
    );
  }

  console.log(`[capture] Found registration publicId=${registration.publicId}, proceeding to capture`);

  // Capture the PayPal order
  let captureId: string;

  try {
    const result = await capturePayPalOrder(token);
    captureId = result.captureId;
    console.log(`[capture] PayPal capture succeeded: captureId=${captureId} status=${result.status}`);
  } catch (err) {
    const message = err instanceof Error ? err.message : "PayPal capture failed.";
    console.error(`[capture] PayPal capture failed for orderId=${token}: ${message}`);
    return NextResponse.json({ error: message }, { status: 502 });
  }

  // Mark the registration as paid in the DB
  await markPaymentPaid(token, captureId);
  console.log(`[capture] Marked payment as paid for orderId=${token} captureId=${captureId}`);

  return NextResponse.json(
    { ok: true, captureId, registrationId: registration.publicId },
    { status: 200 }
  );
}