import { create } from 'zustand';
import { User, Course, Language } from '../types';
import { mockUser, mockCourses } from '../data/mock';

interface AppState {
  user: User | null;
  courses: Course[];
  isAuthenticated: boolean;
  login: (email: string) => void;
  logout: () => void;
  updateLanguage: (lang: Language) => void;
  addStudyTime: (minutes: number) => void;
}

export const useStore = create<AppState>((set) => ({
  user: mockUser,
  courses: mockCourses,
  isAuthenticated: true, // Auto login for demo
  login: (email) => set({ 
    user: { ...mockUser, email }, 
    isAuthenticated: true 
  }),
  logout: () => set({ user: null, isAuthenticated: false }),
  updateLanguage: (lang) => set((state) => ({
    user: state.user ? { ...state.user, currentLanguage: lang } : null
  })),
  addStudyTime: (minutes) => set((state) => ({
    user: state.user ? { ...state.user, totalStudyTime: state.user.totalStudyTime + minutes } : null
  }))
}));