import { defineStore } from 'pinia'
import { ref, computed } from 'vue'
import api from '@/services/api'
import type { AuthResponse } from '@/types'

export const useAuthStore = defineStore('auth', () => {
  const token = ref<string | null>(null)
  const refreshTokenValue = ref<string | null>(null)
  const username = ref<string | null>(null)
  const expiresAt = ref<string | null>(null)

  const isAuthenticated = computed(() => !!token.value)

  function initialize() {
    token.value = localStorage.getItem('purrse_token')
    refreshTokenValue.value = localStorage.getItem('purrse_refresh_token')
    username.value = localStorage.getItem('purrse_username')
    expiresAt.value = localStorage.getItem('purrse_expires_at')
  }

  function setAuth(auth: AuthResponse) {
    token.value = auth.token
    refreshTokenValue.value = auth.refreshToken
    username.value = auth.username
    expiresAt.value = auth.expiresAt
    localStorage.setItem('purrse_token', auth.token)
    localStorage.setItem('purrse_refresh_token', auth.refreshToken)
    localStorage.setItem('purrse_username', auth.username)
    localStorage.setItem('purrse_expires_at', auth.expiresAt)
  }

  async function login(usernameInput: string, password: string) {
    const { data } = await api.post<AuthResponse>('/auth/login', { username: usernameInput, password })
    setAuth(data)
  }

  async function register(usernameInput: string, email: string, password: string) {
    const { data } = await api.post<AuthResponse>('/auth/register', { username: usernameInput, email, password })
    setAuth(data)
  }

  async function refreshToken() {
    if (!refreshTokenValue.value) throw new Error('No refresh token')
    const { data } = await api.post<AuthResponse>('/auth/refresh', { refreshToken: refreshTokenValue.value })
    setAuth(data)
  }

  function logout() {
    token.value = null
    refreshTokenValue.value = null
    username.value = null
    expiresAt.value = null
    localStorage.removeItem('purrse_token')
    localStorage.removeItem('purrse_refresh_token')
    localStorage.removeItem('purrse_username')
    localStorage.removeItem('purrse_expires_at')
  }

  return { token, username, expiresAt, isAuthenticated, initialize, login, register, refreshToken, logout }
})