import type { FormerAPICallType } from './Former.types';

function FormerRestHeadSpecAPI(options: {
  authToken: string;
  fetchOptions?: Partial<RequestInit>;
  signal?: AbortSignal;
  url: string;
}): FormerAPICallType {
  return async (mode, request, value, key) => {
    const baseUrl = options.url ?? ''; // Remove trailing slashes
    let url = baseUrl;
    const fetchOptions: RequestInit = {
      cache: 'no-cache',
      signal: options.signal,
      ...options.fetchOptions,
      body: mode === 'mutate' && request !== 'delete' ? JSON.stringify(value) : undefined,
      headers: {
        Authorization: `Bearer ${options.authToken}`,
        'Content-Type': 'application/json',
        ...options.fetchOptions?.headers,
      },
      method:
        mode === 'read'
          ? 'GET'
          : request === 'delete'
            ? 'DELETE'
            : request === 'update'
              ? 'PUT'
              : 'POST',
    };

    if (request !== 'insert') {
      url = `${baseUrl}/${key}`;
    }

    const response = await fetch(url, fetchOptions);
    if (!response.ok) {
      throw new Error(`API request failed with status ${response.status}`);
    }

    if (mode === 'read') {
      const data = await response.json();
      return data as any;
    } else {
      return value as any;
    }
  };
}

export { FormerRestHeadSpecAPI };