import { EventEmitter } from 'events'
import { logger } from '../../utils/logger.js'
import { PacificaProxyClient } from '../../exchanges/pacifica/PacificaProxyClient.js'
import { SamePlatformHedgingManager } from './SamePlatformHedgingManager.js'

/**
 * 优化的统一对冲系统
 * 整合基差管理、价格收敛、止盈止损等功能到现有架构中
 */
export class OptimizedHedgingSystem extends EventEmitter {
  private platformManager: SamePlatformHedgingManager
  private dataCache: Map<string, CacheEntry> = new Map()
  private config: OptimizedConfig
  private mainInterval?: NodeJS.Timeout
  private cycleCount: number = 0

  // 整合的状态管理
  private accountStates: Map<string, EnhancedAccountState> = new Map()
  private basisData: Map<string, BasisDataPoint[]> = new Map()
  private performanceMetrics: PerformanceMetrics

  constructor(config?: Partial<OptimizedConfig>) {
    super()

    this.config = {
      mainCycleIntervalMs: config?.mainCycleIntervalMs || 5000, // 统一5秒间隔
      cacheTimeoutMs: config?.cacheTimeoutMs || 2000, // 2秒缓存
      basisConfig: {
        maxDeviation: config?.basisConfig?.maxDeviation || 200,
        alertThreshold: config?.basisConfig?.alertThreshold || 100,
        historyRetentionHours: config?.basisConfig?.historyRetentionHours || 24,
      },
      convergenceConfig: {
        maxPriceDeviation: config?.convergenceConfig?.maxPriceDeviation || 0.005,
        convergenceStepPercent: config?.convergenceConfig?.convergenceStepPercent || 0.001,
        maxDailyAdjustments: config?.convergenceConfig?.maxDailyAdjustments || 20,
      },
      stopLossConfig: {
        defaultStopLoss: config?.stopLossConfig?.defaultStopLoss || 0.015,
        defaultTakeProfit: config?.stopLossConfig?.defaultTakeProfit || 0.025,
        enableTrailing: config?.stopLossConfig?.enableTrailing || true,
      },
      riskLimits: {
        maxPositionSize: config?.riskLimits?.maxPositionSize || 0.01,
        maxTotalExposure: config?.riskLimits?.maxTotalExposure || 0.05,
        emergencyStopThreshold: config?.riskLimits?.emergencyStopThreshold || -0.03,
        ...config?.riskLimits,
      },
    }

    this.platformManager = new SamePlatformHedgingManager('pacifica', this.config.riskLimits)
    this.performanceMetrics = this.initializeMetrics()
  }

  /**
   * 启动优化的对冲系统
   */
  async start(): Promise<void> {
    logger.info('启动优化对冲系统')

    // 单一主循环定时器
    this.mainInterval = setInterval(() => {
      this.executeMainCycle()
    }, this.config.mainCycleIntervalMs)

    logger.info('优化对冲系统已启动', {
      interval: this.config.mainCycleIntervalMs,
      cacheTimeout: this.config.cacheTimeoutMs,
    })

    this.emit('systemStarted')
  }

  /**
   * 停止系统
   */
  async stop(): Promise<void> {
    if (this.mainInterval) {
      clearInterval(this.mainInterval)
      this.mainInterval = undefined
    }

    logger.info('优化对冲系统已停止')
    this.emit('systemStopped')
  }

  /**
   * 添加交易对
   */
  async addTradingPair(
    pairId: string,
    account1Config: AccountConfig,
    account2Config: AccountConfig,
    symbol: string,
  ): Promise<void> {
    // 使用现有平台管理器添加账户
    this.platformManager.addAccount(account1Config.account, account1Config)
    this.platformManager.addAccount(account2Config.account, account2Config)
    this.platformManager.createHedgePair(pairId, account1Config.account, account2Config.account, symbol)

    // 初始化增强状态跟踪
    this.accountStates.set(account1Config.account, this.createEnhancedAccountState(account1Config.account))
    this.accountStates.set(account2Config.account, this.createEnhancedAccountState(account2Config.account))

    logger.info('添加交易对到优化系统', { pairId, symbol })
  }

  /**
   * 主执行循环 - 替代多个定时器
   */
  private async executeMainCycle(): Promise<void> {
    try {
      this.cycleCount++

      // 每个周期都执行的核心功能
      await this.updateCachedData()
      await this.performIntegratedRiskCheck()
      await this.checkAndExecuteStrategies()

      // 基于周期数执行不同频率的任务
      if (this.cycleCount % 3 === 0) {
        // 每15秒：生成交易信号和检查收敛
        await this.executeConvergenceCheck()
      }

      if (this.cycleCount % 6 === 0) {
        // 每30秒：基差分析和预警
        await this.executeBasisAnalysis()
      }

      if (this.cycleCount % 12 === 0) {
        // 每60秒：系统健康检查和性能统计
        await this.performSystemHealthCheck()
        await this.updatePerformanceMetrics()
      }

      // 每100个周期重置计数器
      if (this.cycleCount >= 100) {
        this.cycleCount = 0
      }
    } catch (error: any) {
      logger.error('主循环执行失败', { error: error.message, cycle: this.cycleCount })
      this.emit('systemError', { error, cycle: this.cycleCount })
    }
  }

  /**
   * 智能缓存数据更新
   */
  private async updateCachedData(): Promise<void> {
    const tasks = []

    // 并行更新所有账户数据
    for (const accountId of this.accountStates.keys()) {
      tasks.push(this.updateAccountData(accountId))
    }

    // 更新市场数据
    tasks.push(this.updateMarketData())

    await Promise.allSettled(tasks)
  }

  /**
   * 更新单个账户数据（带缓存）
   */
  private async updateAccountData(accountId: string): Promise<void> {
    const cacheKey = `account_${accountId}`
    const cached = this.getFromCache(cacheKey)

    if (cached) {
      return cached
    }

    try {
      // 使用平台管理器更新仓位
      await this.platformManager.updateAccountPositions(accountId)

      // 更新增强状态
      const accountState = this.accountStates.get(accountId)
      if (accountState) {
        // 获取最新仓位和余额信息
        accountState.lastUpdate = Date.now()
        // 这里可以添加更多状态更新逻辑
      }

      this.setCache(cacheKey, true)
    } catch (error: any) {
      logger.warn('更新账户数据失败', { accountId, error: error.message })
    }
  }

  /**
   * 更新市场数据（带缓存）
   */
  private async updateMarketData(): Promise<void> {
    const cacheKey = 'market_data'
    const cached = this.getFromCache(cacheKey)

    if (cached) {
      return cached
    }

    try {
      // 获取市场价格数据
      // 这里可以调用现有的价格获取逻辑
      this.setCache(cacheKey, true)
    } catch (error: any) {
      logger.warn('更新市场数据失败', { error: error.message })
    }
  }

  /**
   * 集成的风险检查
   */
  private async performIntegratedRiskCheck(): Promise<void> {
    try {
      // 1. 基础风险检查（复用现有逻辑）
      const hedgeStatuses = this.platformManager.getHedgePairStatuses()

      // 2. 基差风险检查
      const basisRisk = await this.checkBasisRisk()

      // 3. 收敛风险检查
      const convergenceRisk = await this.checkConvergenceRisk()

      // 4. 综合风险评估
      const overallRisk = this.calculateOverallRisk(hedgeStatuses, basisRisk, convergenceRisk)

      if (overallRisk.level === 'HIGH' || overallRisk.level === 'CRITICAL') {
        this.emit('riskAlert', overallRisk)

        if (overallRisk.level === 'CRITICAL') {
          await this.triggerEmergencyStop()
        }
      }
    } catch (error: any) {
      logger.error('集成风险检查失败', { error: error.message })
    }
  }

  /**
   * 基差风险检查
   */
  private async checkBasisRisk(): Promise<BasisRiskAssessment> {
    const symbols = this.getMonitoredSymbols()
    const riskEvents: BasisRiskEvent[] = []

    for (const symbol of symbols) {
      const basisHistory = this.basisData.get(symbol) || []

      if (basisHistory.length > 0) {
        const latest = basisHistory[basisHistory.length - 1]
        const basis = Math.abs(latest.basis)

        if (basis > this.config.basisConfig.maxDeviation) {
          riskEvents.push({
            symbol,
            basis: latest.basis,
            threshold: this.config.basisConfig.maxDeviation,
            severity: 'HIGH',
            timestamp: Date.now(),
          })
        } else if (basis > this.config.basisConfig.alertThreshold) {
          riskEvents.push({
            symbol,
            basis: latest.basis,
            threshold: this.config.basisConfig.alertThreshold,
            severity: 'MEDIUM',
            timestamp: Date.now(),
          })
        }
      }
    }

    return {
      overallRisk: riskEvents.length > 0 ? 'HIGH' : 'LOW',
      events: riskEvents,
      timestamp: Date.now(),
    }
  }

  /**
   * 收敛风险检查
   */
  private async checkConvergenceRisk(): Promise<ConvergenceRiskAssessment> {
    const hedgeStatuses = this.platformManager.getHedgePairStatuses()
    const riskEvents: ConvergenceRiskEvent[] = []

    for (const status of hedgeStatuses) {
      const priceDeviation = Math.abs(status.netExposure) // 简化的偏差计算

      if (priceDeviation > this.config.convergenceConfig.maxPriceDeviation) {
        riskEvents.push({
          pairId: status.pairId,
          deviation: priceDeviation,
          threshold: this.config.convergenceConfig.maxPriceDeviation,
          severity: 'HIGH',
          timestamp: Date.now(),
        })
      }
    }

    return {
      overallRisk: riskEvents.length > 0 ? 'HIGH' : 'LOW',
      events: riskEvents,
      timestamp: Date.now(),
    }
  }

  /**
   * 综合风险评估
   */
  private calculateOverallRisk(
    hedgeStatuses: any[],
    basisRisk: BasisRiskAssessment,
    convergenceRisk: ConvergenceRiskAssessment,
  ): OverallRiskAssessment {
    let riskScore = 0
    const factors: string[] = []

    // 基差风险权重 40%
    if (basisRisk.overallRisk === 'HIGH') {
      riskScore += 40
      factors.push(`基差风险高：${basisRisk.events.length}个事件`)
    }

    // 收敛风险权重 35%
    if (convergenceRisk.overallRisk === 'HIGH') {
      riskScore += 35
      factors.push(`收敛风险高：${convergenceRisk.events.length}个事件`)
    }

    // 对冲状态风险权重 25%
    const inactiveHedges = hedgeStatuses.filter(h => !h.isActive).length
    if (inactiveHedges > 0) {
      riskScore += 25
      factors.push(`${inactiveHedges}个对冲对未激活`)
    }

    // 确定风险等级
    let level: 'LOW' | 'MEDIUM' | 'HIGH' | 'CRITICAL'
    if (riskScore >= 80) {
      level = 'CRITICAL'
    } else if (riskScore >= 60) {
      level = 'HIGH'
    } else if (riskScore >= 30) {
      level = 'MEDIUM'
    } else {
      level = 'LOW'
    }

    return {
      level,
      score: riskScore,
      factors,
      basisRisk,
      convergenceRisk,
      timestamp: Date.now(),
    }
  }

  /**
   * 执行收敛检查
   */
  private async executeConvergenceCheck(): Promise<void> {
    try {
      const hedgeStatuses = this.platformManager.getHedgePairStatuses()

      for (const status of hedgeStatuses) {
        const needsAdjustment = Math.abs(status.netExposure) > this.config.convergenceConfig.maxPriceDeviation

        if (needsAdjustment) {
          await this.platformManager.rebalanceHedgePair(status.pairId, 0.01)

          this.emit('convergenceAdjustment', {
            pairId: status.pairId,
            netExposure: status.netExposure,
            timestamp: Date.now(),
          })
        }
      }
    } catch (error: any) {
      logger.error('收敛检查失败', { error: error.message })
    }
  }

  /**
   * 执行基差分析
   */
  private async executeBasisAnalysis(): Promise<void> {
    try {
      const symbols = this.getMonitoredSymbols()

      for (const symbol of symbols) {
        // 模拟基差数据更新
        const spotPrice = await this.getSpotPrice(symbol)
        const futuresPrice = await this.getFuturesPrice(symbol)

        if (spotPrice && futuresPrice) {
          this.updateBasisData(symbol, spotPrice, futuresPrice)
        }
      }
    } catch (error: any) {
      logger.error('基差分析失败', { error: error.message })
    }
  }

  /**
   * 更新基差数据
   */
  private updateBasisData(symbol: string, spotPrice: number, futuresPrice: number): void {
    if (!this.basisData.has(symbol)) {
      this.basisData.set(symbol, [])
    }

    const history = this.basisData.get(symbol)!
    const basis = futuresPrice - spotPrice
    const basisPercent = (basis / spotPrice) * 100

    const dataPoint: BasisDataPoint = {
      spotPrice,
      futuresPrice,
      basis,
      basisPercent,
      timestamp: Date.now(),
    }

    history.push(dataPoint)

    // 限制历史数据长度
    const maxPoints = (this.config.basisConfig.historyRetentionHours * 3600 * 1000) / this.config.mainCycleIntervalMs
    if (history.length > maxPoints) {
      history.splice(0, history.length - maxPoints)
    }

    // 检查是否需要发出基差预警
    if (Math.abs(basis) > this.config.basisConfig.alertThreshold) {
      this.emit('basisAlert', {
        symbol,
        basis,
        basisPercent,
        threshold: this.config.basisConfig.alertThreshold,
        timestamp: Date.now(),
      })
    }
  }

  /**
   * 缓存管理
   */
  private getFromCache(key: string): any {
    const entry = this.dataCache.get(key)
    if (entry && Date.now() - entry.timestamp < this.config.cacheTimeoutMs) {
      return entry.data
    }
    return null
  }

  private setCache(key: string, data: any): void {
    this.dataCache.set(key, {
      data,
      timestamp: Date.now(),
    })
  }

  /**
   * 辅助方法
   */
  private createEnhancedAccountState(accountId: string): EnhancedAccountState {
    return {
      accountId,
      lastUpdate: Date.now(),
      convergenceHistory: [],
      stopLossOrders: [],
      riskScore: 0,
    }
  }

  private initializeMetrics(): PerformanceMetrics {
    return {
      totalAdjustments: 0,
      successfulAdjustments: 0,
      basisAlerts: 0,
      convergenceEvents: 0,
      systemUptime: Date.now(),
    }
  }

  private getMonitoredSymbols(): string[] {
    const hedgeStatuses = this.platformManager.getHedgePairStatuses()
    return hedgeStatuses.map(status => status.symbol)
  }

  private async getSpotPrice(symbol: string): Promise<number | null> {
    // 实现现货价格获取逻辑
    return 50000 // 模拟价格
  }

  private async getFuturesPrice(symbol: string): Promise<number | null> {
    // 实现期货价格获取逻辑
    return 50100 // 模拟价格
  }

  private async performSystemHealthCheck(): Promise<void> {
    // 实现系统健康检查
    logger.debug('系统健康检查完成')
  }

  private async updatePerformanceMetrics(): Promise<void> {
    // 更新性能指标
    this.performanceMetrics.systemUptime = Date.now()
  }

  private async checkAndExecuteStrategies(): Promise<void> {
    // 实现策略检查和执行
  }

  private async triggerEmergencyStop(): Promise<void> {
    logger.warn('触发紧急停止')
    await this.stop()
    this.emit('emergencyStop', { timestamp: Date.now() })
  }

  /**
   * 获取系统状态
   */
  getSystemStatus(): OptimizedSystemStatus {
    return {
      isRunning: !!this.mainInterval,
      activePairs: this.platformManager.getHedgePairStatuses().length,
      accountCount: this.accountStates.size,
      performanceMetrics: this.performanceMetrics,
      cacheEntries: this.dataCache.size,
      cycleCount: this.cycleCount,
    }
  }
}

// 类型定义
export interface AccountConfig {
  account: string
  privateKey: string
  agentWallet?: string
  agentPrivateKey?: string
}

export interface OptimizedConfig {
  mainCycleIntervalMs: number
  cacheTimeoutMs: number
  basisConfig: {
    maxDeviation: number
    alertThreshold: number
    historyRetentionHours: number
  }
  convergenceConfig: {
    maxPriceDeviation: number
    convergenceStepPercent: number
    maxDailyAdjustments: number
  }
  stopLossConfig: {
    defaultStopLoss: number
    defaultTakeProfit: number
    enableTrailing: boolean
  }
  riskLimits: {
    maxPositionSize: number
    maxTotalExposure: number
    emergencyStopThreshold: number
  }
}

export interface CacheEntry {
  data: any
  timestamp: number
}

export interface EnhancedAccountState {
  accountId: string
  lastUpdate: number
  convergenceHistory: any[]
  stopLossOrders: any[]
  riskScore: number
}

export interface BasisDataPoint {
  spotPrice: number
  futuresPrice: number
  basis: number
  basisPercent: number
  timestamp: number
}

export interface BasisRiskEvent {
  symbol: string
  basis: number
  threshold: number
  severity: 'LOW' | 'MEDIUM' | 'HIGH'
  timestamp: number
}

export interface ConvergenceRiskEvent {
  pairId: string
  deviation: number
  threshold: number
  severity: 'LOW' | 'MEDIUM' | 'HIGH'
  timestamp: number
}

export interface BasisRiskAssessment {
  overallRisk: 'LOW' | 'HIGH'
  events: BasisRiskEvent[]
  timestamp: number
}

export interface ConvergenceRiskAssessment {
  overallRisk: 'LOW' | 'HIGH'
  events: ConvergenceRiskEvent[]
  timestamp: number
}

export interface OverallRiskAssessment {
  level: 'LOW' | 'MEDIUM' | 'HIGH' | 'CRITICAL'
  score: number
  factors: string[]
  basisRisk: BasisRiskAssessment
  convergenceRisk: ConvergenceRiskAssessment
  timestamp: number
}

export interface PerformanceMetrics {
  totalAdjustments: number
  successfulAdjustments: number
  basisAlerts: number
  convergenceEvents: number
  systemUptime: number
}

export interface OptimizedSystemStatus {
  isRunning: boolean
  activePairs: number
  accountCount: number
  performanceMetrics: PerformanceMetrics
  cacheEntries: number
  cycleCount: number
}