export interface SayahApiResponse {
  ReturnValue?: boolean;
  HasError?: boolean;
  IsSucceed?: boolean;
  isSucceed?: boolean;
  Errors?: Record<string, string> | Array<{ Code?: string; Message?: string }> | null;
  errors?: Record<string, string> | Array<{ Code?: string; Message?: string }> | null;
  Result?: {
    ErrorMessage?: string | null;
    [key: string]: unknown;
  };
}

export function formatSayahErrors(
  errors?: Record<string, string> | Array<{ Code?: string; Message?: string }> | null,
): string {
  if (!errors) {
    return 'Request failed';
  }

  if (Array.isArray(errors)) {
    if (errors.length === 0) {
      return 'Request failed';
    }
    return errors.map((error) => `${error.Code}: ${error.Message}`).join(', ');
  }

  const entries = Object.entries(errors);
  if (entries.length === 0) {
    return 'Request failed';
  }

  return entries.map(([code, field]) => `${field} (code: ${code})`).join(', ');
}

export function getSayahProviderError(
  body: SayahApiResponse,
): { message: string; code: string } | null {
  if ('ReturnValue' in body || 'HasError' in body) {
    if (body.HasError) {
      return {
        message: formatSayahErrors(body.Errors),
        code: 'SAYAH_ERROR',
      };
    }

    if (body.ReturnValue === false) {
      return {
        message: formatSayahErrors(body.Errors),
        code: 'SHEBA_MISMATCH',
      };
    }

    return null;
  }

  const isSucceed = body.IsSucceed ?? body.isSucceed;
  if (isSucceed === false) {
    const errors = body.Errors ?? body.errors;
    return {
      message:
        (Array.isArray(errors) || (errors && Object.keys(errors).length > 0)
          ? formatSayahErrors(errors)
          : body.Result?.ErrorMessage) ?? 'Request failed',
      code: 'API_ERROR',
    };
  }

  return null;
}