import { defineStore } from 'pinia'
import { getToken, setToken, getUser, setUser, clearAuth } from '@/utils/auth.js'
import { userApi } from '@/api/index.js'

export const useUserStore = defineStore('user', {
  state: () => ({
    token: '',
    userInfo: {},
    balance: 0, // 统一可用点数
    balanceDetail: {} // 后端原始余额明细 { points, gpt3_balance, gpt4_balance, mj_balance }
  }),

  getters: {
    isLogin: (state) => !!state.token,
    // 兼容后端多种字段命名
    nickname: (state) => state.userInfo.nick_name || state.userInfo.nickname || state.userInfo.user_name || 'AI在线用户',
    avatar: (state) => state.userInfo.head_url || state.userInfo.avatar || '',
    // 点数展示文案
    pointsText: (state) => (state.balance < 0 ? '不限' : String(state.balance))
  },

  actions: {
    /** 从本地存储恢复登录态（App 启动时调用） */
    restore() {
      this.token = getToken()
      this.userInfo = getUser()
    },

    /** 登录成功后写入 */
    setLogin({ token, userInfo }) {
      this.token = token || ''
      this.userInfo = userInfo || {}
      setToken(this.token)
      setUser(this.userInfo)
    },

    /** 拉取最新用户信息 */
    async fetchUserInfo() {
      const res = await userApi.getInfo()
      this.userInfo = res.data || {}
      setUser(this.userInfo)
      return this.userInfo
    },

    /**
     * 拉取点数余额。
     * 后端返回新版点数 points，同时兼容旧资源包 { gpt3_balance, gpt4_balance, mj_balance }。
     * 个人中心优先展示新版点数；旧接口未合并时才回退到旧资源包合计。
     */
    async fetchBalance() {
      const res = await userApi.getBalance()
      const detail = res.data || {}
      this.balanceDetail = detail
      if (detail.points !== undefined || detail.point_balance !== undefined) {
        this.balance = Number(detail.points !== undefined ? detail.points : detail.point_balance) || 0
        return this.balance
      }
      const { gpt3_balance = 0, gpt4_balance = 0, mj_balance = 0 } = detail
      if ([gpt3_balance, gpt4_balance, mj_balance].some((v) => v <= -9999)) {
        this.balance = -1 // 不限
      } else {
        this.balance = gpt3_balance + gpt4_balance + mj_balance
      }
      return this.balance
    },

    /** 退出登录/登录失效，清空状态 */
    clear() {
      this.token = ''
      this.userInfo = {}
      this.balance = 0
      clearAuth()
    }
  }
})