import { defineStore } from 'pinia';
import { ref, computed } from 'vue';
import { apiFetch } from '../services/api';

export const useAuthStore = defineStore('auth', () => {
  const user = ref(JSON.parse(localStorage.getItem('choreus_user') || 'null'));
  const token = ref(localStorage.getItem('choreus_token') || null);
  const loading = ref(false);
  const error = ref(null);

  const isAuthenticated = computed(() => !!token.value && !!user.value);
  const isAdmin = computed(() => user.value?.role === 'admin');

  async function demoLogin(email) {
    loading.value = true;
    error.value = null;
    try {
      const data = await apiFetch('/auth/demo-login', {
        method: 'POST',
        body: JSON.stringify({ email })
      });
      setAuthData(data.access_token, data.user);
      return data.user;
    } catch (err) {
      error.value = err.message;
      throw err;
    } finally {
      loading.value = false;
    }
  }

  async function googleLogin(credential, payload = {}) {
    loading.value = true;
    error.value = null;
    try {
      const data = await apiFetch('/auth/google', {
        method: 'POST',
        body: JSON.stringify({ credential, ...payload })
      });
      setAuthData(data.access_token, data.user);
      return data.user;
    } catch (err) {
      error.value = err.message;
      throw err;
    } finally {
      loading.value = false;
    }
  }

  async function fetchCurrentUser() {
    if (!token.value) return null;
    try {
      const userData = await apiFetch('/auth/me');
      user.value = userData;
      localStorage.setItem('choreus_user', JSON.stringify(userData));
      return userData;
    } catch (err) {
      logout();
      return null;
    }
  }

  async function updateProfile(updates) {
    if (!user.value) return;
    try {
      const updatedUser = await apiFetch(`/users/${user.value.id}`, {
        method: 'PATCH',
        body: JSON.stringify(updates)
      });
      user.value = updatedUser;
      localStorage.setItem('choreus_user', JSON.stringify(updatedUser));
      return updatedUser;
    } catch (err) {
      error.value = err.message;
      throw err;
    }
  }

  function setAuthData(accessToken, userData) {
    token.value = accessToken;
    user.value = userData;
    localStorage.setItem('choreus_token', accessToken);
    localStorage.setItem('choreus_user', JSON.stringify(userData));
  }

  function logout() {
    token.value = null;
    user.value = null;
    localStorage.removeItem('choreus_token');
    localStorage.removeItem('choreus_user');
  }

  return {
    user,
    token,
    loading,
    error,
    isAuthenticated,
    isAdmin,
    demoLogin,
    googleLogin,
    fetchCurrentUser,
    updateProfile,
    logout
  };
});