const GHL_API_BASE = "https://services.leadconnectorhq.com";
const GHL_API_VERSION = "2021-07-28";

export async function createGHLContact(data: {
  email: string;
  firstName?: string;
  lastName?: string;
  phone?: string;
  company?: string;
  source?: string;
  tags?: string[];
}) {
  const locationId = process.env.GHL_LOCATION_ID;
  const apiToken = process.env.GHL_API_TOKEN;

  if (!locationId || !apiToken) {
    console.warn("GHL credentials incomplete; skipping contact creation.");
    return null;
  }

  const nameParts =
    data.firstName || data.lastName
      ? {
          first_name: data.firstName || "",
          last_name: data.lastName || "",
        }
      : {};

  const body: Record<string, unknown> = {
    location_id: locationId,
    email: data.email,
    ...nameParts,
    ...(data.phone && { phone: data.phone }),
    ...(data.company && { company_name: data.company }),
    ...(data.source && { source: data.source }),
    ...(data.tags?.length && { tags: data.tags }),
  };

  const res = await fetch(`${GHL_API_BASE}/contacts/`, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      Accept: "application/json",
      Version: GHL_API_VERSION,
      Authorization: `Bearer ${apiToken}`,
    },
    body: JSON.stringify(body),
    cache: "no-store",
  });

  if (!res.ok) {
    const text = await res.text();
    console.error("GHL contact creation failed:", res.status, text);
    return null;
  }

  return res.json();
}