import { defineStore } from 'pinia'
import { ref, computed } from 'vue'
import axios from 'axios'

export interface Alert {
  id: number
  rule_name: string
  message: string
  level: 'critical' | 'error' | 'warning' | 'info'
  alert_type: 'performance' | 'quality' | 'volume' | 'system' | 'business'
  data?: any
  created_at: string
  resolved_at?: string
  status: 'active' | 'resolved'
}

export interface AlertRule {
  name: string
  description?: string
  alert_type: 'performance' | 'quality' | 'volume' | 'system' | 'business'
  level: 'critical' | 'error' | 'warning' | 'info'
  threshold: number
  condition: string
  enabled: boolean
  check_interval: number
  cooldown: number
}

export interface SystemHealth {
  health_score: number
  status: 'excellent' | 'good' | 'fair' | 'poor' | 'critical' | 'unknown'
  details?: any
}

export interface MonitorStatus {
  monitor_status: 'running' | 'stopped' | 'unknown'
}

export const useAlertStore = defineStore('alert', () => {
  // 状态
  const alerts = ref<Alert[]>([])
  const rules = ref<AlertRule[]>([])
  const health = ref<SystemHealth>({ health_score: 0, status: 'unknown' })
  const monitorStatus = ref<MonitorStatus>({ monitor_status: 'unknown' })
  const loading = ref(false)
  const alertFilter = ref('all')
  const alertSort = ref('time-desc')
  
  // 计算属性
  const filteredAlerts = computed(() => {
    let filtered = alerts.value
    
    // 应用过滤
    if (alertFilter.value !== 'all') {
      filtered = filtered.filter(alert => alert.level === alertFilter.value)
    }
    
    // 应用排序
    filtered.sort((a, b) => {
      switch (alertSort.value) {
        case 'time-desc':
          return new Date(b.created_at).getTime() - new Date(a.created_at).getTime()
        case 'time-asc':
          return new Date(a.created_at).getTime() - new Date(b.created_at).getTime()
        case 'level-desc':
          const levelOrder = { 'critical': 4, 'error': 3, 'warning': 2, 'info': 1 }
          return (levelOrder[b.level] || 0) - (levelOrder[a.level] || 0)
        case 'level-asc':
          const levelOrderAsc = { 'critical': 4, 'error': 3, 'warning': 2, 'info': 1 }
          return (levelOrderAsc[a.level] || 0) - (levelOrderAsc[b.level] || 0)
        default:
          return 0
      }
    })
    
    return filtered
  })
  
  const alertStatistics = computed(() => {
    const stats = alerts.value.reduce((acc, alert) => {
      acc[alert.level] = (acc[alert.level] || 0) + 1
      acc.total = (acc.total || 0) + 1
      return acc
    }, {} as Record<string, number>)
    
    return {
      critical: stats.critical || 0,
      warning: stats.warning || 0,
      info: stats.info || 0,
      total: stats.total || 0
    }
  })
  
  // 动作
  const loadAlerts = async () => {
    try {
      loading.value = true
      const response = await axios.get('/api/alerts')
      alerts.value = response.data
    } catch (error) {
      console.error('加载预警失败:', error)
      throw error
    } finally {
      loading.value = false
    }
  }
  
  const loadRules = async () => {
    try {
      loading.value = true
      const response = await axios.get('/api/rules')
      rules.value = response.data
    } catch (error) {
      console.error('加载规则失败:', error)
      throw error
    } finally {
      loading.value = false
    }
  }
  
  const loadHealth = async () => {
    try {
      const response = await axios.get('/api/health')
      health.value = response.data
    } catch (error) {
      console.error('加载健康状态失败:', error)
      throw error
    }
  }
  
  const loadMonitorStatus = async () => {
    try {
      const response = await axios.get('/api/monitor/status')
      monitorStatus.value = response.data
    } catch (error) {
      console.error('加载监控状态失败:', error)
      throw error
    }
  }
  
  const startMonitoring = async () => {
    try {
      const response = await axios.post('/api/monitor/start')
      if (response.data.success) {
        await loadMonitorStatus()
        return true
      }
      return false
    } catch (error) {
      console.error('启动监控失败:', error)
      throw error
    }
  }
  
  const stopMonitoring = async () => {
    try {
      const response = await axios.post('/api/monitor/stop')
      if (response.data.success) {
        await loadMonitorStatus()
        return true
      }
      return false
    } catch (error) {
      console.error('停止监控失败:', error)
      throw error
    }
  }
  
  const checkAlerts = async () => {
    try {
      const response = await axios.post('/api/check-alerts')
      if (response.data.success) {
        await loadAlerts()
        return response.data.count
      }
      return 0
    } catch (error) {
      console.error('检查预警失败:', error)
      throw error
    }
  }
  
  const resolveAlert = async (alertId: number) => {
    try {
      const response = await axios.post(`/api/alerts/${alertId}/resolve`)
      if (response.data.success) {
        await loadAlerts()
        return true
      }
      return false
    } catch (error) {
      console.error('解决预警失败:', error)
      throw error
    }
  }
  
  const createRule = async (rule: Omit<AlertRule, 'name'> & { name: string }) => {
    try {
      const response = await axios.post('/api/rules', rule)
      if (response.data.success) {
        await loadRules()
        return true
      }
      return false
    } catch (error) {
      console.error('创建规则失败:', error)
      throw error
    }
  }
  
  const updateRule = async (originalName: string, rule: AlertRule) => {
    try {
      const response = await axios.put(`/api/rules/${originalName}`, rule)
      if (response.data.success) {
        await loadRules()
        return true
      }
      return false
    } catch (error) {
      console.error('更新规则失败:', error)
      throw error
    }
  }
  
  const deleteRule = async (ruleName: string) => {
    try {
      const response = await axios.delete(`/api/rules/${ruleName}`)
      if (response.data.success) {
        await loadRules()
        return true
      }
      return false
    } catch (error) {
      console.error('删除规则失败:', error)
      throw error
    }
  }
  
  const setAlertFilter = (filter: string) => {
    alertFilter.value = filter
  }
  
  const setAlertSort = (sort: string) => {
    alertSort.value = sort
  }
  
  const loadInitialData = async () => {
    await Promise.all([
      loadHealth(),
      loadAlerts(),
      loadRules(),
      loadMonitorStatus()
    ])
  }
  
  return {
    // 状态
    alerts,
    rules,
    health,
    monitorStatus,
    loading,
    alertFilter,
    alertSort,
    
    // 计算属性
    filteredAlerts,
    alertStatistics,
    
    // 动作
    loadAlerts,
    loadRules,
    loadHealth,
    loadMonitorStatus,
    startMonitoring,
    stopMonitoring,
    checkAlerts,
    resolveAlert,
    createRule,
    updateRule,
    deleteRule,
    setAlertFilter,
    setAlertSort,
    loadInitialData
  }
})