import { FetcherError } from '@commerce/utils/errors'
import type { GraphQLFetcher } from '@commerce/api'
import type { KiboCommerceConfig } from '../index'
import fetch from './fetch'
import { APIAuthenticationHelper } from './api-auth-helper';

const fetchGraphqlApi: (
  getConfig: () => KiboCommerceConfig
) => GraphQLFetcher = (getConfig) => async (
  query: string,
  { variables, preview } = {},
  fetchOptions
) => {
  const config = getConfig()
  const authHelper = new APIAuthenticationHelper(config);
  const apiToken = await authHelper.getAccessToken();
  const res = await fetch(config.commerceUrl + (preview ? '/preview' : ''), {
    ...fetchOptions,
    method: 'POST',
    headers: {
      ...fetchOptions?.headers,
      Authorization: `Bearer ${apiToken}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      query,
      variables,
    }),
  })

  const json = await res.json()
  if (json.errors) {
    console.warn(`Kibo API Request Correlation ID: ${res.headers.get('x-vol-correlation')}`);
    throw new FetcherError({
      errors: json.errors ?? [{ message: 'Failed to fetch KiboCommerce API' }],
      status: res.status,
    })
  }

  return { data: json.data, res }
}

export default fetchGraphqlApi