/** User-visible browser cowork lines for the Oo's thread context (German product copy is applied in UI). */

export type BrowserUserActionKind = "navigate" | "click" | "type" | "scroll" | "page_change";

export function maskBrowserUserDetail(detail: string, passwordField = false): string {
  if (passwordField) return "••••••";
  const trimmed = detail.trim();
  if (!trimmed) return trimmed;
  if (/password|passwort|pin|secret|token|api[_-]?key/i.test(trimmed)) return "••••••";
  return trimmed.slice(0, 500);
}

export function browserUserContextLine(
  kind: BrowserUserActionKind,
  detail: string,
  passwordField = false,
): string {
  const safe = maskBrowserUserDetail(detail, passwordField);
  switch (kind) {
    case "navigate":
      return `User navigated to ${safe}`;
    case "click":
      return `User clicked ${safe}`;
    case "type":
      return passwordField ? "User typed in a password field" : `User typed ${safe}`;
    case "scroll":
      return `User scrolled ${safe}`;
    case "page_change":
      return `User page changed to ${safe}`;
    default: {
      const _exhaustive: never = kind;
      return _exhaustive;
    }
  }
}