export function useAuth() {
  const supabase = useSupabaseClient()
  const user = useSupabaseUser()

  const loading = ref(false)
  const error = ref<string | null>(null)

  async function login(email: string, password: string) {
    loading.value = true
    error.value = null
    const { error: err } = await supabase.auth.signInWithPassword({ email, password })
    if (err) error.value = err.message
    loading.value = false
    return !err
  }

  async function register(email: string, password: string) {
    loading.value = true
    error.value = null
    const { error: err } = await supabase.auth.signUp({ email, password })
    if (err) error.value = err.message
    loading.value = false
    return !err
  }

  async function loginWithGoogle() {
    loading.value = true
    error.value = null
    const { error: err } = await supabase.auth.signInWithOAuth({
      provider: 'google',
      options: { redirectTo: `${window.location.origin}/auth/confirm` }
    })
    if (err) error.value = err.message
    loading.value = false
  }

  async function logout() {
    await supabase.auth.signOut()
    await navigateTo('/')
  }

  return { user, loading, error, login, register, loginWithGoogle, logout }
}