import createFetchClient from "openapi-fetch";
import createClient from "openapi-react-query";

import type { paths } from "@/client/lib/openapi-types";

// baseUrl is empty because the generated `paths` already start with `/api/v1/`
// (openapi-typescript emits paths verbatim from the OpenAPI document).
export const fetchClient = createFetchClient<paths>({
  baseUrl: "",
  credentials: "include",
});

export const $api = createClient(fetchClient);

export function isApiError(value: unknown): value is { error: { code: string; message: string } } {
  if (!value || typeof value !== "object") return false;
  const err = (value as { error?: unknown }).error;
  if (!err || typeof err !== "object") return false;
  const obj = err as { code?: unknown; message?: unknown };
  return typeof obj.code === "string" && typeof obj.message === "string";
}

export function apiErrorMessage(value: unknown, fallback = "Something went wrong."): string {
  if (isApiError(value)) return value.error.message;
  if (value instanceof Error) return value.message;
  return fallback;
}