import { create } from 'zustand';
import type { LessonTreeNode } from '@flashcard/shared';
import { lessonsApi } from '../api/lessons.js';

interface LessonsState {
  tree: LessonTreeNode[];
  loading: boolean;
  refresh: () => Promise<void>;
}

export const useLessons = create<LessonsState>((set) => ({
  tree: [],
  loading: false,
  refresh: async () => {
    set({ loading: true });
    try { set({ tree: await lessonsApi.tree() }); }
    finally { set({ loading: false }); }
  },
}));