import type { WebErrorCode, WebResult } from "../shared/web";
const messages: Record<WebErrorCode, string> = {
  invalid_selector:
    "Use a valid CSS selector, or omit the selector to read the loaded page.",
  invalid_url: "Use an absolute HTTP or HTTPS URL without credentials.",
  blocked_url: "Private or local URLs and redirects are not allowed.",
  timeout:
    "The website did not respond within the research time limit. Try another source.",
  cancelled: "Web research was cancelled.",
  http_error:
    "The website returned an unsuccessful HTTP response. Try another source.",
  unsupported_content:
    "This reader supports HTML, Markdown and plain text. Use a text version of this source.",
  request_failed:
    "The website could not be read. Check the URL or try another source.",
  search_blocked:
    "The search service blocked or rate-limited this request. Try again later or read a known URL.",
  unexpected_search_page:
    "The search page did not contain recognizable results. Try again later or read a known URL.",
  browser_unavailable:
    "The browser service is unavailable. Try again later or read a known URL.",
  cleanup_failed:
    "The browser session could not be confirmed closed. It has a short inactivity expiry; try again later.",
};
export class WebFailure extends Error {
  constructor(
    public code: WebErrorCode,
    public status?: number,
  ) {
    super(messages[code]);
  }
}
export function webFailure(code: WebErrorCode, status?: number): WebResult {
  return {
    ok: false,
    code,
    message: messages[code],
    ...(status === undefined ? {} : { status }),
  };
}
export function webError(error: unknown, signal?: AbortSignal): WebResult {
  if (signal?.aborted)
    return webFailure(
      signal.reason instanceof WebFailure ? signal.reason.code : "cancelled",
    );
  if (error instanceof WebFailure) return webFailure(error.code, error.status);
  return webFailure("request_failed");
}