/**
 * The account menu on every page (TASK-self-edit-avatar-menu-20260928 S2).
 *
 * The account dialogs live on `/`. Off `/`, the same menu's dialog entries
 * are links to `/?account=<dialog>`; Home opens that dialog once its account
 * is ready and drops the parameter, so a reload or Back never opens it again.
 * Theme needs no dialog and applies where the reader is.
 *
 * No dependencies: this ships with the shared sidebar.
 */

export const ACCOUNT_DIALOG_QUERY_KEY = "account";
export const ACCOUNT_DIALOG_INTENTS = ["profile", "general", "billing", "logout"] as const;
export type AccountDialogIntent = (typeof ACCOUNT_DIALOG_INTENTS)[number];

export function accountDialogHref(dialog: AccountDialogIntent): string {
  return `/?${ACCOUNT_DIALOG_QUERY_KEY}=${dialog}`;
}

/** The dialog the URL asks for; null when absent or not one of the four. */
export function parseAccountDialogIntent(search: string): AccountDialogIntent | null {
  const params = new URLSearchParams(search.startsWith("?") ? search.slice(1) : search);
  const value = params.get(ACCOUNT_DIALOG_QUERY_KEY);
  return (ACCOUNT_DIALOG_INTENTS as readonly string[]).includes(value ?? "") ? value as AccountDialogIntent : null;
}

/** The same query without the account intent (a malformed value is dropped too). */
export function searchWithoutAccountDialogIntent(search: string): string {
  const params = new URLSearchParams(search.startsWith("?") ? search.slice(1) : search);
  params.delete(ACCOUNT_DIALOG_QUERY_KEY);
  const query = params.toString();
  return query ? `?${query}` : "";
}