import { ref, computed, watch } from 'vue'
import { defineStore } from 'pinia'
import { getJSON, setJSON, remove } from '@/utils/storage'
import { clearAllTokens } from '@gold/utils/token-manager'

// 本地持久化的 key
const STORAGE_KEY = 'user_store_v1'

export const useUserStore = defineStore('user', () => {
  // 基本信息
  const isLoggedIn = ref(false)
  const userId = ref('')
  const nickname = ref('')
  const avatar = ref('')
  // 微信相关
  const wechatOpenId = ref('')
  const wechatUnionId = ref('')
  const wechatNickname = ref('')
  const wechatAvatar = ref('')
  // 资产与配额
  const balance = ref(0)
  const vipLevel = ref(0)
  const credits = ref(0)

  const displayName = computed(() => nickname.value || wechatNickname.value || '未命名用户')
  const displayAvatar = computed(() => avatar.value || wechatAvatar.value || '')

  // 恢复本地
  async function hydrateFromStorage() {
    const saved = await getJSON(STORAGE_KEY)
    if (!saved) return
    isLoggedIn.value = !!saved.isLoggedIn
    userId.value = saved.userId || ''
    nickname.value = saved.nickname || ''
    avatar.value = saved.avatar || ''
    wechatOpenId.value = saved.wechatOpenId || ''
    wechatUnionId.value = saved.wechatUnionId || ''
    wechatNickname.value = saved.wechatNickname || ''
    wechatAvatar.value = saved.wechatAvatar || ''
    balance.value = Number(saved.balance || 0)
    vipLevel.value = Number(saved.vipLevel || 0)
    credits.value = Number(saved.credits || 0)
  }

  // 持久化
  async function persist() {
    const payload = {
      isLoggedIn: isLoggedIn.value,
      userId: userId.value,
      nickname: nickname.value,
      avatar: avatar.value,
      wechatOpenId: wechatOpenId.value,
      wechatUnionId: wechatUnionId.value,
      wechatNickname: wechatNickname.value,
      wechatAvatar: wechatAvatar.value,
      balance: balance.value,
      vipLevel: vipLevel.value,
      credits: credits.value,
    }
    await setJSON(STORAGE_KEY, payload)
  }

  // 监听关键字段做持久化
  ;[
    isLoggedIn,
    userId,
    nickname,
    avatar,
    wechatOpenId,
    wechatUnionId,
    wechatNickname,
    wechatAvatar,
    balance,
    vipLevel,
    credits,
  ].forEach((s) => watch(s, persist))

  // 登录/登出动作（示例：具体接入后端可在此对接）
  async function loginWithPhone(payload) {
    // payload: { phone, code, profile? }
    isLoggedIn.value = true
    userId.value = payload?.profile?.userId || userId.value
    nickname.value = payload?.profile?.nickname || nickname.value
    avatar.value = payload?.profile?.avatar || avatar.value
    balance.value = payload?.profile?.balance ?? balance.value
    vipLevel.value = payload?.profile?.vipLevel ?? vipLevel.value
    credits.value = payload?.profile?.credits ?? credits.value
    await persist()
  }

  async function loginWithWeChat(profile) {
    // profile: { openId, unionId, nickname, avatar, balance, vipLevel, credits }
    isLoggedIn.value = true
    wechatOpenId.value = profile?.openId || ''
    wechatUnionId.value = profile?.unionId || ''
    wechatNickname.value = profile?.nickname || ''
    wechatAvatar.value = profile?.avatar || ''
    balance.value = profile?.balance ?? balance.value
    vipLevel.value = profile?.vipLevel ?? vipLevel.value
    credits.value = profile?.credits ?? credits.value
    await persist()
  }

  async function updateBalance(delta) {
    balance.value = Math.max(0, Number(balance.value) + Number(delta || 0))
    await persist()
  }

  /**
   * 获取用户信息（从后端）
   * 登录成功后调用，更新用户信息
   * 使用公共 hook @gold/hooks/web/useUserInfo
   */
  async function fetchUserInfo() {
    try {
      // 使用公共 hook 获取用户信息
      const { getUserInfo } = await import('@gold/hooks/web/useUserInfo')
      const { getToken } = await import('@gold/utils/token-manager')
      
      const userInfo = await getUserInfo({
        getToken,
      })
      
      if (userInfo) {
        // 更新用户信息
        userId.value = String(userInfo.id || userInfo.userId || userId.value)
        nickname.value = userInfo.nickname || nickname.value
        avatar.value = userInfo.avatar || avatar.value
        // 如果有其他字段，也可以更新
        if (userInfo.point !== undefined) credits.value = Number(userInfo.point || 0)
        if (userInfo.experience !== undefined) {
          // experience 可以映射到其他字段，根据实际需求
        }
        await persist()
      }
    } catch (error) {
      console.error('获取用户信息失败:', error)
      // 不抛出错误，避免影响登录流程
    }
  }

  async function logout() {
    // 1. 清空所有 token
    try {
      clearAllTokens()
    } catch (e) {
      console.error('清空 token 失败:', e)
    }
    
    // 2. 清空用户信息
    isLoggedIn.value = false
    userId.value = ''
    nickname.value = ''
    avatar.value = ''
    wechatOpenId.value = ''
    wechatUnionId.value = ''
    wechatNickname.value = ''
    wechatAvatar.value = ''
    balance.value = 0
    vipLevel.value = 0
    credits.value = 0
    
    // 3. 删除本地存储的用户数据
    await remove(STORAGE_KEY)
  }

  // 初始化标志
  const isHydrated = ref(false)

  // 初始化从本地恢复
  hydrateFromStorage().then(() => {
    isHydrated.value = true
  })

  return {
    // 状态
    isHydrated,
    // state
    isLoggedIn,
    userId,
    nickname,
    avatar,
    wechatOpenId,
    wechatUnionId,
    wechatNickname,
    wechatAvatar,
    balance,
    vipLevel,
    credits,
    // getters
    displayName,
    displayAvatar,
    // actions
    loginWithPhone,
    loginWithWeChat,
    updateBalance,
    fetchUserInfo,
    logout,
  }
})

export default useUserStore