import createFetchClient from "openapi-fetch";
import type { paths } from "@/lib/api/v1";
import { API_URL } from "@/lib/env";

/** Typed API client for client components. Unlike the server one, the browser carries the session cookie itself - it only has to be asked to. */
export const apiClient = createFetchClient<paths>({
  baseUrl: API_URL,
  credentials: "include",
});

/** Resolves an API call to its data, throwing the API's error message. */
export async function unwrap<T>(
  request: Promise<{ data?: T; error?: unknown }>,
): Promise<T> {
  const { data, error } = await request;
  if (error !== undefined) throw new Error(apiErrorMessage(error));
  return data as T;
}

/** The message the API's error filter returns, or a status-code fallback. */
export function apiErrorMessage(
  error: unknown,
  fallback = "Something went wrong",
) {
  const message = (error as { message?: unknown } | undefined)?.message;
  if (typeof message === "string") return message;
  // ValidationPipe answers with one message per failed constraint.
  if (Array.isArray(message) && message.length > 0) return message.join(", ");
  return fallback;
}