/*** UTILITY ------------------------------------------ ***/

import { buildHeaders, postJson } from "./http-body.ts";
import type { Fetcher, FetcherOptions } from "./types.ts";

/*** EXPORT ------------------------------------------- ***/

export function createHttpFetcher(options: FetcherOptions): Fetcher {
  const fetchImpl = options.fetch ?? globalThis.fetch;

  return async (req) => {
    return await postJson(fetchImpl, options.url, buildHeaders(options, req), {
      operationName: req.operationName,
      query: req.query,
      variables: req.variables
    });
  };
}