export const runtime = "nodejs";

import { NextRequest, NextResponse } from "next/server";
import { createPayPalOrder } from "@/lib/paypal";
import { createRegistrationWithPayment } from "@/lib/summit-requests";
import type { AdminRequestRow } from "@/types/admin-submission";

interface CreateOrderBody {
  fullName: string;
  phone?: string;
  email: string;
  company?: string;
  jobTitle?: string;
  industry?: string;
  industryLabel?: string;
  notes?: string;
}

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

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

  // Validate required fields
  if (!body.fullName || !body.email) {
    console.error("[create-order] Validation failed — fullName:", JSON.stringify(body.fullName), "email:", JSON.stringify(body.email));
    return NextResponse.json(
      { error: "fullName and email are required." },
      { status: 400 }
    );
  }

  // Generate a short unique public ID
  const publicId = "V6-" + crypto.randomUUID().slice(0, 8).toUpperCase();

  // Build the AdminRequestRow
  const row: AdminRequestRow = {
    id: publicId,
    submittedAt: new Date().toISOString().slice(0, 10),
    displayDate: new Date()
      .toLocaleDateString("en-GB", {
        day: "2-digit",
        month: "short",
        year: "numeric",
      })
      .toUpperCase(),
    fullName: body.fullName,
    jobTitle: body.jobTitle ?? "",
    company: body.company ?? "",
    segment: body.industry ?? "",
    email: body.email,
    phone: body.phone ?? "",
    status: "pending",
    notes: body.notes ?? "",
    source: "registration",
  };

  // Create the PayPal order
  let orderId: string;
  let approvalUrl: string;

  try {
    const result = await createPayPalOrder(publicId);
    orderId = result.orderId;
    approvalUrl = result.approvalUrl;
  } catch (err) {
    const message = err instanceof Error ? err.message : "PayPal order creation failed.";
    console.error("[create-order] PayPal error:", message);
    return NextResponse.json({ error: message }, { status: 502 });
  }

  // Persist the registration with the pending payment
  await createRegistrationWithPayment(row, orderId);

  return NextResponse.json(
    { approvalUrl, registrationId: publicId },
    { status: 200 }
  );
}