import Constants from "expo-constants";
import { getToken } from "./auth";

const baseUrl = (Constants.expoConfig?.extra as any)?.API_BASE_URL ?? "http://localhost:3001";

export async function api<T>(path: string, opts: RequestInit & { auth?: boolean } = {}): Promise<T> {
  const headers: Record<string, string> = {
    "Content-Type": "application/json",
    ...(opts.headers as any),
  };

  if (opts.auth) {
    const token = await getToken();
    if (token) headers["Authorization"] = `Bearer ${token}`;
  }

  const res = await fetch(`${baseUrl}${path}`, { ...opts, headers });
  if (!res.ok) {
    const text = await res.text().catch(() => "");
    throw new Error(`API ${res.status}: ${text || res.statusText}`);
  }
  return res.json() as Promise<T>;
}