import { defineStore } from 'pinia'
import { ref } from 'vue'
import { getProfile } from '@/api'

export const useUserStore = defineStore('user', () => {
  const user = ref<any>(null)
  const token = ref(localStorage.getItem('access_token') || '')

  function setToken(newToken: string) {
    if (!newToken) return
    token.value = newToken
    localStorage.setItem('access_token', newToken)
  }

  function setTokens(accessToken: string, refreshToken?: string) {
    if (!accessToken) return
    token.value = accessToken
    localStorage.setItem('access_token', accessToken)
    if (refreshToken) {
      localStorage.setItem('refresh_token', refreshToken)
    }
  }

  function getRefreshToken(): string {
    return localStorage.getItem('refresh_token') || ''
  }

  function clearToken() {
    token.value = ''
    user.value = null
    localStorage.removeItem('access_token')
    localStorage.removeItem('refresh_token')
  }

  async function fetchProfile() {
    if (!token.value && localStorage.getItem('access_token')) {
      token.value = localStorage.getItem('access_token') || ''
    }
    if (!token.value) {
      user.value = null
      return null
    }
    try {
      user.value = await getProfile()
      return user.value
    } catch (error) {
      clearToken()
      throw error
    }
  }

  async function refreshCreditsFromResponse(response: any) {
    const credits = response?.credits
    const balance = typeof credits?.balance === 'number' ? credits.balance : undefined
    if (typeof balance !== 'number') return
    if (!user.value) {
      await fetchProfile().catch(() => undefined)
    }
    user.value = {
      ...(user.value || {}),
      credits: balance,
      total_credits_used: typeof credits?.cost === 'number'
        ? Number(user.value?.total_credits_used || 0) + credits.cost
        : user.value?.total_credits_used,
    }
  }

  const isLoggedIn = () => !!token.value

  return { user, token, setToken, setTokens, getRefreshToken, clearToken, fetchProfile, refreshCreditsFromResponse, isLoggedIn }
})