import {RequestParams} from '../graphql-client/types';

import {
  AllOperations,
  ApiClient,
  ApiClientConfig,
  ApiClientRequestOptions,
} from './types';

export function generateGetHeaders(
  config: ApiClientConfig,
): ApiClient['getHeaders'] {
  return (customHeaders) => {
    return {...(customHeaders ?? {}), ...config.headers};
  };
}

export function generateGetGQLClientParams<
  Operations extends AllOperations = AllOperations,
>({getHeaders, getApiUrl}: Pick<ApiClient, 'getHeaders' | 'getApiUrl'>) {
  return <Operation extends keyof Operations>(
    operation: Operation,
    options?: ApiClientRequestOptions<Operation, Operations>,
  ): RequestParams => {
    const props: RequestParams = [operation as string];

    if (options && Object.keys(options).length > 0) {
      const {
        variables,
        apiVersion: propApiVersion,
        headers,
        retries,
        signal,
      } = options as any;

      props.push({
        ...(variables ? {variables} : {}),
        ...(headers ? {headers: getHeaders(headers)} : {}),
        ...(propApiVersion ? {url: getApiUrl(propApiVersion)} : {}),
        ...(retries ? {retries} : {}),
        ...(signal ? {signal} : {}),
      });
    }

    return props;
  };
}