export interface SessionSlice {
  lang: "ru" | "en";
  /** True when the first visible screen has finished loading; used to hide content until ready(). */
  appContentReady: boolean;
  /** True when GET /api/admin/me returned is_admin: true; used to show Admin link. */
  isAdmin: boolean;
  setLang: (v: "ru" | "en") => void;
  setAppContentReady: (v: boolean) => void;
  setIsAdmin: (v: boolean) => void;
}

type SessionSet = (updater: Partial<SessionSlice> | ((state: SessionSlice) => Partial<SessionSlice>)) => void;

export const createSessionSlice = (set: SessionSet): SessionSlice => ({
  lang: "en",
  appContentReady: false,
  isAdmin: false,
  setLang: (v) => set({ lang: v }),
  setAppContentReady: (v) => set({ appContentReady: v }),
  setIsAdmin: (v) => set({ isAdmin: v }),
});