import { defineStore } from 'pinia'
import { ref, computed } from 'vue'
import api from '@/utils/api'
import { ElMessage } from 'element-plus'

export const useUserStore = defineStore('user', () => {
  // 状态
  const user = ref(null)
  const token = ref(localStorage.getItem('token') || '')
  const loading = ref(false)

  // 计算属性
  const isAuthenticated = computed(() => {
    return !!token.value && !!user.value
  })

  const isAdmin = computed(() => {
    return user.value?.role === 'admin'
  })

  // 设置token
  const setToken = (newToken) => {
    token.value = newToken
    if (newToken) {
      localStorage.setItem('token', newToken)
      api.defaults.headers.common['Authorization'] = `Bearer ${newToken}`
    } else {
      localStorage.removeItem('token')
      delete api.defaults.headers.common['Authorization']
    }
  }

  // 设置用户信息
  const setUser = (userData) => {
    user.value = userData
  }

  // 登录
  const login = async (credentials) => {
    try {
      loading.value = true
      const response = await api.post('/auth/login', credentials)
      
      if (response.data.token) {
        setToken(response.data.token)
        setUser(response.data.user)
        startStatusCheck() // 登录成功后开始状态检查
        ElMessage.success(response.data.message || '登录成功')
        return { success: true, data: response.data }
      }
    } catch (error) {
      const message = error.response?.data?.message || '登录失败'
      ElMessage.error(message)
      return { success: false, message }
    } finally {
      loading.value = false
    }
  }

  // 注册
  const register = async (userData) => {
    try {
      loading.value = true
      const response = await api.post('/auth/register', userData)
      
      if (response.data.token) {
        setToken(response.data.token)
        setUser(response.data.user)
        ElMessage.success(response.data.message || '注册成功')
        return { success: true, data: response.data }
      }
    } catch (error) {
      const message = error.response?.data?.message || '注册失败'
      ElMessage.error(message)
      return { success: false, message }
    } finally {
      loading.value = false
    }
  }

  // 登出
  const logout = () => {
    stopStatusCheck() // 登出时停止状态检查
    setToken('')
    setUser(null)
    ElMessage.success('已退出登录')
  }

  // 检查认证状态
  const checkAuth = async () => {
    if (!token.value) {
      return false
    }

    try {
      // 确保请求头已设置
      if (token.value && !api.defaults.headers.common['Authorization']) {
        api.defaults.headers.common['Authorization'] = `Bearer ${token.value}`
      }
      
      const response = await api.get('/auth/me')
      setUser(response.data.user)
      return true
    } catch (error) {
      // token无效，清除本地存储
      setToken('')
      setUser(null)
      return false
    }
  }

  // 更新用户信息
  const updateProfile = async (userData) => {
    try {
      loading.value = true
      const response = await api.put(`/users/${user.value.id}`, userData)
      
      setUser(response.data.user)
      ElMessage.success(response.data.message || '更新成功')
      return { success: true, data: response.data }
    } catch (error) {
      const message = error.response?.data?.message || '更新失败'
      ElMessage.error(message)
      return { success: false, message }
    } finally {
      loading.value = false
    }
  }

  // 修改密码
  const changePassword = async (passwordData) => {
    try {
      loading.value = true
      const response = await api.put('/auth/change-password', passwordData)
      
      ElMessage.success(response.data.message || '密码修改成功')
      return { success: true, data: response.data }
    } catch (error) {
      const message = error.response?.data?.message || '密码修改失败'
      ElMessage.error(message)
      return { success: false, message }
    } finally {
      loading.value = false
    }
  }

  // 获取用户详情
  const getUserInfo = async (userId) => {
    try {
      const response = await api.get(`/users/${userId}`)
      return { success: true, data: response.data.user }
    } catch (error) {
      const message = error.response?.data?.message || '获取用户信息失败'
      return { success: false, message }
    }
  }

  // 定期检查用户状态（用于检测拉黑等状态变化）
  let statusCheckInterval = null
  
  /**
   * 开始定期检查用户状态
   * 每5分钟检查一次用户状态，确保及时发现被拉黑等情况
   */
  const startStatusCheck = () => {
    if (statusCheckInterval) {
      clearInterval(statusCheckInterval)
    }
    
    statusCheckInterval = setInterval(async () => {
      if (isAuthenticated.value) {
        try {
          await api.get('/auth/me')
        } catch (error) {
          // 如果是拉黑错误，API拦截器会自动处理
          // 这里不需要额外处理
        }
      }
    }, 5 * 60 * 1000) // 5分钟检查一次
  }
  
  /**
   * 停止定期检查用户状态
   */
  const stopStatusCheck = () => {
    if (statusCheckInterval) {
      clearInterval(statusCheckInterval)
      statusCheckInterval = null
    }
  }

  return {
    // 状态
    user,
    token,
    loading,
    
    // 计算属性
    isAuthenticated,
    isAdmin,
    
    // 方法
    setToken,
    setUser,
    login,
    register,
    logout,
    checkAuth,
    updateProfile,
    changePassword,
    getUserInfo,
    startStatusCheck,
    stopStatusCheck
  }
})