import * as HttpErrors from './httpErrors.js';

export class InvalidHandler extends Error {}

/**
 * Parses a Retry-After header into a non-negative integer number of seconds to wait. Handles both the
 * delay-seconds and HTTP-date forms defined by RFC 9110, and rounds up so callers never retry earlier than
 * the provider asked. Returns undefined when the header is absent, blank, or unparseable.
 *
 * Internal to the SDK (errors.ts is not re-exported from index): the SDK populates HttpError.retryAfter
 * centrally in Provider.handleError, so integrations don't need to call this themselves.
 */
export function parseRetryAfterSeconds(headerValue: string | null | undefined): number | undefined {
  const trimmed = headerValue?.trim();
  if (!trimmed) {
    return undefined;
  }

  const asSeconds = Number(trimmed);
  if (!Number.isNaN(asSeconds)) {
    return Math.max(0, Math.ceil(asSeconds));
  }

  const asDate = new Date(trimmed).valueOf();
  if (!Number.isNaN(asDate)) {
    return Math.max(0, Math.ceil((asDate - Date.now()) / 1000));
  }

  return undefined;
}

/**
 * Processes provider response codes and returns the corresponding errors to be translated further in our responses
 *
 * @param responseStatus the reponseStatus of the request. Any HTTP response code passed here will result in an error!
 * @param message The message returned by the provider
 */
// Keep in errors.ts instead of httpErrors.ts because we do not need to export it outside of the sdk
export function buildHttpError(responseStatus: number, message: string): HttpErrors.HttpError {
  let httpError: HttpErrors.HttpError;
  if (responseStatus === 400) {
    httpError = new HttpErrors.BadRequestError(message);
  } else if (responseStatus === 401) {
    httpError = new HttpErrors.UnauthorizedError(message);
  } else if (responseStatus === 403) {
    httpError = new HttpErrors.ForbiddenError(message);
  } else if (responseStatus === 404) {
    httpError = new HttpErrors.NotFoundError(message);
  } else if (responseStatus === 408) {
    httpError = new HttpErrors.TimeoutError(message);
  } else if (responseStatus === 410) {
    httpError = new HttpErrors.ResourceGoneError(message);
  } else if (responseStatus === 422) {
    httpError = new HttpErrors.UnprocessableEntityError(message);
  } else if (responseStatus === 423) {
    httpError = new HttpErrors.ProviderInstanceLockedError(message);
  } else if (responseStatus === 429) {
    httpError = new HttpErrors.RateLimitExceededError(message);
  } else {
    httpError = new HttpErrors.HttpError(message, responseStatus);
  }

  return httpError;
}