import Cookies from "js-cookie";

type CookieOptions = NonNullable<Parameters<typeof Cookies.set>[2]>;

/**
 * Freight's own active-position cookie.
 *
 * Smart Office is a separate app on the same IAM and it also writes a cookie
 * named `current-position-id` — but it stores `position.id` where freight
 * stores `employeePositionId`. The two are not interchangeable, so on a shared
 * domain each app's login silently overwrote the other's desk selection and the
 * loser fell back to `positions[0]`. Freight keeps its own cookie name so both
 * can hold a selection at once.
 */
export const POSITION_COOKIE = "freight-current-position-id";

/**
 * The pre-rename, shared-with-Smart-Office name. Still read so a session that
 * is live across the deploy keeps its desk, and cleared on every write so the
 * colliding cookie does not linger.
 */
const LEGACY_POSITION_COOKIE = "current-position-id";

/** The active `employeePositionId`, or undefined when no desk is selected. */
export const getPositionCookie = (): string | undefined =>
  Cookies.get(POSITION_COOKIE) ?? Cookies.get(LEGACY_POSITION_COOKIE);

export const setPositionCookie = (
  value: string,
  options?: CookieOptions,
): void => {
  Cookies.set(POSITION_COOKIE, value, options);
  Cookies.remove(LEGACY_POSITION_COOKIE);
};

export const clearPositionCookie = (): void => {
  Cookies.remove(POSITION_COOKIE);
  Cookies.remove(LEGACY_POSITION_COOKIE);
};