/**
 * Position Manager Startup Initialization
 * 
 * Ensures Position Manager starts monitoring on bot startup
 * This prevents orphaned trades when the bot restarts
 */

import { getInitializedPositionManager } from '../trading/position-manager'
import { logger } from '../utils/logger'
import { initializeDriftService } from '../drift/client'
import { getPrismaClient, createTrade } from '../database/trades'
import { getMarketConfig, getMergedConfig } from '../../config/trading'
import { startBlockedSignalTracking } from '../analysis/blocked-signal-tracker'
import { startStopHuntTracking } from '../trading/stop-hunt-tracker'
import { startSmartValidation } from '../trading/smart-validation-queue'
import { startDataCleanup } from '../maintenance/data-cleanup'
import { logCriticalError } from '../utils/persistent-logger'
import { sendPositionClosedNotification } from '../notifications/telegram'

let initStarted = false

export async function initializePositionManagerOnStartup() {
  if (initStarted) {
    return
  }
  
  initStarted = true
  
  logger.log('🚀 Initializing Position Manager on startup...')
  
  try {
    // CRITICAL (Dec 5, 2025): Start services FIRST, before validation
    // Bug fix: validateOpenTrades() returns early if no trades, skipping services
    // Services must run regardless of open trades count
    
    // CRITICAL (Dec 2, 2025): Start data cleanup service for 4-week retention
    // User directive: "we want to store the data for 4 weeks"
    // Runs daily at 3 AM to delete MarketData records older than 28 days
    console.log('🧹 Starting data cleanup service...')
    startDataCleanup()
    
    // Start blocked signal price tracking
    console.log('🔬 Starting blocked signal price tracker...')
    startBlockedSignalTracking()
    
    // Start stop hunt revenge tracker
    console.log('🎯 Starting stop hunt revenge tracker...')
    await startStopHuntTracking()
    
    // Start smart entry validation queue (Nov 30, 2025)
    console.log('🧠 Starting smart entry validation system...')
    await startSmartValidation()
    
    // CRITICAL: Run database sync validator to clean up duplicates
    const { validateAllOpenTrades } = await import('../database/sync-validator')
    console.log('🔍 Running database sync validation before Position Manager init...')
    const validationResult = await validateAllOpenTrades()
    
    if (validationResult.ghosts > 0) {
      logger.log(`✅ Cleaned up ${validationResult.ghosts} ghost/duplicate trades`)
    }
    
    // Then validate open trades against Drift positions
    await validateOpenTrades()
    
    // CRITICAL: Detect orphaned positions (on Drift but not in database)
    await detectOrphanedPositions()
    
    const manager = await getInitializedPositionManager()
    const status = manager.getStatus()
    
    console.log(`✅ Position Manager ready - ${status.activeTradesCount} active trades`)
    
    if (status.activeTradesCount > 0) {
      console.log(`📊 Monitoring: ${status.symbols.join(', ')}`)
    }
  } catch (error) {
    console.error('❌ Failed to initialize Position Manager on startup:', error)
  }
}

/**
 * Validate that open trades in database match actual Drift positions
 * 
 * CRITICAL FIX (Nov 14, 2025):
 * - Also checks trades marked as "closed" in DB that might still be open on Drift
 * - Happens when close transaction fails but bot marks it as closed anyway
 * - Restores Position Manager tracking for these orphaned positions
 */
async function validateOpenTrades() {
  try {
    const prisma = getPrismaClient()
    
    // Get both truly open trades AND recently "closed" trades (last 24h)
    // Recently closed trades might still be open if close transaction failed
    // TEMPORARILY REDUCED: Check only last 5 closed trades to avoid rate limiting on startup
    const [openTrades, recentlyClosedTrades] = await Promise.all([
      prisma.trade.findMany({
        where: { status: 'open' },
        orderBy: { entryTime: 'asc' }
      }),
      prisma.trade.findMany({
        where: {
          exitReason: { not: null },
          exitTime: { gte: new Date(Date.now() - 6 * 60 * 60 * 1000) } // Last 6 hours (reduced from 24h)
        },
        orderBy: { exitTime: 'desc' },
        take: 5 // Reduced from 20 to avoid rate limiting
      })
    ])
    
    const allTradesToCheck = [...openTrades, ...recentlyClosedTrades]
    
    if (allTradesToCheck.length === 0) {
      logger.log('✅ No open trades to validate')
      return
    }
    
    logger.log(`🔍 Validating ${openTrades.length} open + ${recentlyClosedTrades.length} recently closed trades against Drift...`)
    
    // CRITICAL: Group trades by symbol to handle multiple DB entries for same Drift position
    // This prevents reopening old closed trades when only the most recent should be restored
    const tradesBySymbol = new Map<string, any[]>()
    for (const trade of allTradesToCheck) {
      const existing = tradesBySymbol.get(trade.symbol) || []
      existing.push(trade)
      tradesBySymbol.set(trade.symbol, existing)
    }
    
    const driftService = await initializeDriftService()
    const driftPositions = await driftService.getAllPositions() // Get all positions once
    
    // Process each symbol's trades (keep only most recent if multiple exist)
    for (const [symbol, trades] of tradesBySymbol) {
      // Sort by creation time, newest first
      trades.sort((a, b) => b.createdAt.getTime() - a.createdAt.getTime())
      const mostRecentTrade = trades[0]
      const olderTrades = trades.slice(1)
      
      // Close any older trades BEFORE validating the most recent
      for (const oldTrade of olderTrades) {
        if (oldTrade.exitReason === null) {
          logger.log(`🗑️ Closing duplicate old trade: ${oldTrade.id} (${symbol}, created ${oldTrade.createdAt.toISOString()})`)
          await prisma.trade.update({
            where: { id: oldTrade.id },
            data: {
              status: 'closed',
              exitTime: new Date(),
              exitReason: 'DUPLICATE_CLEANUP',
              exitPrice: oldTrade.entryPrice,
              realizedPnL: 0,
            }
          })
        }
      }
      
      // Now validate only the most recent trade for this symbol
      const trade = mostRecentTrade
      
      try {
        const marketConfig = getMarketConfig(trade.symbol)
        
        // Find matching Drift position by symbol
        const position = driftPositions.find(p => p.symbol === trade.symbol)
        
        if (!position || position.size === 0) {
          // No position on Drift
          if (trade.status === 'open') {
            logger.log(`⚠️ PHANTOM TRADE: ${trade.symbol} marked open in DB but not found on Drift`)
            logger.log(`   🗑️ Auto-closing phantom trade...`)
            
            await prisma.trade.update({
              where: { id: trade.id },
              data: {
                status: 'closed',
                exitTime: new Date(),
                exitReason: 'PHANTOM_TRADE_CLEANUP',
                exitPrice: trade.entryPrice,
                realizedPnL: 0,
                realizedPnLPercent: 0,
              }
            })
          }
          // If already closed in DB and not on Drift, that's correct - skip
          continue
        }
        
        // Position EXISTS on Drift
        const driftDirection = position.side.toLowerCase() as 'long' | 'short'
        
        if (driftDirection !== trade.direction) {
          logger.log(`⚠️ DIRECTION MISMATCH: ${trade.symbol} DB=${trade.direction} Drift=${driftDirection}`)
          continue
        }
        
        // CRITICAL: If DB says closed but Drift shows open, restore tracking!
        if (trade.exitReason !== null) {
          logger.log(`🔴 CRITICAL: ${trade.symbol} marked as CLOSED in DB but still OPEN on Drift!`)
          logger.log(`   DB entry: $${trade.entryPrice.toFixed(2)} | Drift entry: $${position.entryPrice.toFixed(2)}`)
          logger.log(`   DB exit: ${trade.exitReason} at ${trade.exitTime?.toISOString()}`)
          logger.log(`   Drift: ${position.size} ${trade.symbol} ${driftDirection} @ $${position.entryPrice.toFixed(2)}`)
          logger.log(`   🔄 Reopening trade and correcting entry price to match Drift...`)
          
          // Calculate position size in USD using Drift's entry price
          const currentPrice = await driftService.getOraclePrice(marketConfig.driftMarketIndex)
          const positionSizeUSD = position.size * currentPrice
          
          await prisma.trade.update({
            where: { id: trade.id },
            data: {
              status: 'open',
              exitReason: null,
              exitTime: null,
              exitPrice: null,
              entryPrice: position.entryPrice, // CRITICAL: Use Drift's actual entry price, not DB value
              positionSizeUSD: positionSizeUSD, // Update to current size (may be runner after TP1)
              // Keep original realizedPnL from partial closes if any
            }
          })
          
          logger.log(`   ✅ Trade restored with corrected entry: $${position.entryPrice.toFixed(2)} (was $${trade.entryPrice.toFixed(2)})`)
        } else {
          logger.log(`✅ ${trade.symbol} ${trade.direction}: Position verified on Drift`)
        }
        
        // CRITICAL FIX (Nov 16, 2025): Restore missing on-chain orders
        // Ghost position closed at 22:03 because orders were missing after validator cleanup
        // This ensures EVERY verified position has on-chain TP/SL protection
        if (position && Math.abs(position.size) >= 0.01) {
          await restoreOrdersIfMissing(trade, position, driftService, prisma)
        }
        
      } catch (posError) {
        console.error(`❌ Error validating trade ${trade.symbol}:`, posError)
      }
    }
    
  } catch (error) {
    console.error('❌ Error in validateOpenTrades:', error)
  }
}

/**
 * Restore on-chain exit orders if missing (Nov 16, 2025)
 * 
 * CRITICAL: After validator cleanups or container restarts, positions may exist
 * on Drift without any on-chain TP/SL orders. This leaves only Position Manager
 * software protection - if bot crashes, position is completely unprotected.
 * 
 * This function checks if orders exist and places them if missing.
 */
async function restoreOrdersIfMissing(
  trade: any,
  position: any,
  driftService: any,
  prisma: any
): Promise<void> {
  try {
    // Check if position has any reduce-only orders
    const hasOrders = position.orders && position.orders.length > 0
    
    if (hasOrders) {
      logger.log(`✅ ${trade.symbol} has ${position.orders.length} on-chain orders - protection active`)
      return // Orders exist, nothing to do
    }
    
    logger.log(`⚠️ ${trade.symbol} has NO on-chain orders - restoring TP/SL protection...`)
    
    // Import order placement function
    const { placeExitOrders } = await import('../drift/orders')
    
    // Place exit orders using trade's TP/SL prices
    const result = await placeExitOrders({
      symbol: trade.symbol,
      direction: trade.direction,
      entryPrice: trade.entryPrice,
      tp1Price: trade.takeProfit1Price,
      tp2Price: trade.takeProfit2Price,
      stopLossPrice: trade.stopLossPrice,
      positionSizeUSD: trade.positionSizeUSD,
      tp1SizePercent: 75,
      tp2SizePercent: 0, // TP2-as-runner
    })
    
    if (result.success) {
      logger.log(`✅ Orders restored for ${trade.symbol}:`)
      logger.log(`   TP1: $${trade.takeProfit1Price.toFixed(4)} (75%)`)
      logger.log(`   TP2: $${trade.takeProfit2Price.toFixed(4)} (runner trigger)`)
      logger.log(`   SL: $${trade.stopLossPrice.toFixed(4)}`)
      logger.log(`   TX: ${result.signatures?.[0]?.slice(0, 8)}...`)
      
      // Update database with order transaction signatures
      await prisma.trade.update({
        where: { id: trade.id },
        data: {
          tp1OrderTx: result.signatures?.[0],
          tp2OrderTx: result.signatures?.[1],
          slOrderTx: result.signatures?.[2],
        }
      })
    } else {
      console.error(`❌ Failed to restore orders for ${trade.symbol}:`, result.error)
      console.error(`   🚨 CRITICAL: Position is unprotected - only Position Manager monitoring active`)
    }
    
  } catch (error) {
    console.error(`❌ Error restoring orders for ${trade.symbol}:`, error)
    console.error(`   🚨 CRITICAL: Position may be unprotected`)
  }
}

/**
 * Detect orphaned positions - positions on Drift with NO database record
 * 
 * CRITICAL FIX (Nov 21, 2025): Prevents ghost positions from database save failures
 * 
 * This can happen when:
 * - Database save fails silently during trade execution
 * - Prisma transaction rolls back but no error thrown
 * - Container restart interrupts database save
 * 
 * Recovery:
 * 1. Create retroactive database record with current Drift data
 * 2. Send Telegram alert about orphaned position found
 * 3. Add to Position Manager for normal TP/SL monitoring
 */
async function detectOrphanedPositions() {
  try {
    const prisma = getPrismaClient()
    const driftService = await initializeDriftService()
    
    logger.log('🔍 Checking for orphaned positions on Drift...')
    
    // Get all open positions from Drift
    const driftPositions = await driftService.getAllPositions()
    
    if (driftPositions.length === 0) {
      logger.log('✅ No positions on Drift')
      return
    }
    
    logger.log(`🔍 Found ${driftPositions.length} positions on Drift, checking database...`)
    
    // Get all open trades from database
    const openTrades = await prisma.trade.findMany({
      where: { status: 'open' },
      select: { symbol: true, positionId: true, direction: true }
    })
    
    const trackedSymbols = new Set(openTrades.map(t => `${t.symbol}-${t.direction}`))
    
    // Check each Drift position
    for (const position of driftPositions) {
      const positionKey = `${position.symbol}-${position.side.toLowerCase()}`
      
      if (trackedSymbols.has(positionKey)) {
        logger.log(`✅ ${position.symbol} ${position.side} tracked in database`)
        continue
      }
      
      // ORPHAN DETECTED!
      // Get current price from Drift oracle
      const marketConfig = getMarketConfig(position.symbol)
      const currentPrice = await driftService.getOraclePrice(marketConfig.driftMarketIndex)
      const positionSizeUSD = Math.abs(position.size) * currentPrice
      
      logger.log(`🚨 ORPHAN POSITION DETECTED!`)
      logger.log(`   Symbol: ${position.symbol}`)
      logger.log(`   Direction: ${position.side}`)
      logger.log(`   Size: ${Math.abs(position.size)} (notional: $${positionSizeUSD.toFixed(2)})`)
      logger.log(`   Entry: $${position.entryPrice.toFixed(4)}`)
      logger.log(`   Current: $${currentPrice.toFixed(4)}`)
      
      // Log to persistent file
      logCriticalError('ORPHAN POSITION DETECTED - Creating retroactive database record', {
        symbol: position.symbol,
        direction: position.side.toLowerCase(),
        entryPrice: position.entryPrice,
        size: Math.abs(position.size),
        currentPrice: currentPrice,
        detectedAt: new Date().toISOString()
      })
      
      try {
        // Get config for TP/SL calculation
        const config = getMergedConfig()
        
        // Calculate estimated TP/SL prices based on current config
        const direction = position.side.toLowerCase() as 'long' | 'short'
        const entryPrice = position.entryPrice
        
        // Calculate TP/SL using same logic as execute endpoint
        const stopLossPrice = direction === 'long'
          ? entryPrice * (1 + config.stopLossPercent / 100)
          : entryPrice * (1 - config.stopLossPercent / 100)
        
        const tp1Price = direction === 'long'
          ? entryPrice * (1 + config.takeProfit1Percent / 100)
          : entryPrice * (1 - config.takeProfit1Percent / 100)
        
        const tp2Price = direction === 'long'
          ? entryPrice * (1 + config.takeProfit2Percent / 100)
          : entryPrice * (1 - config.takeProfit2Percent / 100)
        
        // Create retroactive database record
        logger.log(`🔄 Creating retroactive database record...`)
        const trade = await createTrade({
          positionId: `ORPHAN-${Date.now()}`, // Fake position ID since we don't have transaction
          symbol: position.symbol,
          direction: direction,
          entryPrice: entryPrice,
          positionSizeUSD: positionSizeUSD,
          leverage: config.leverage,
          stopLossPrice: stopLossPrice,
          takeProfit1Price: tp1Price,
          takeProfit2Price: tp2Price,
          tp1SizePercent: config.takeProfit1SizePercent || 75,
          tp2SizePercent: config.takeProfit2SizePercent || 0,
          entryOrderTx: `ORPHAN-${Date.now()}`, // Fake transaction ID
          configSnapshot: config,
          signalSource: 'orphan_recovery',
          timeframe: 'unknown',
          status: 'open',
        })
        
        logger.log(`✅ Retroactive database record created: ${trade.id}`)
        
        // Send Telegram notification
        try {
          await sendPositionClosedNotification({
            symbol: position.symbol,
            direction: direction,
            entryPrice: entryPrice,
            exitPrice: currentPrice,
            positionSize: positionSizeUSD,
            realizedPnL: 0, // Unknown
            holdTimeSeconds: 0,
            exitReason: 'ORPHAN_DETECTED',
            maxGain: 0,
            maxDrawdown: 0,
          })
        } catch (telegramError) {
          console.error('Failed to send orphan notification:', telegramError)
        }
        
        logger.log(`🎯 Orphan position now tracked and monitored`)
        
      } catch (recoveryError) {
        console.error(`❌ Failed to recover orphan position ${position.symbol}:`, recoveryError)
        logCriticalError('ORPHAN RECOVERY FAILED', {
          symbol: position.symbol,
          error: recoveryError instanceof Error ? recoveryError.message : String(recoveryError)
        })
      }
    }
    
    logger.log('✅ Orphan position detection complete')
    
  } catch (error) {
    console.error('❌ Error detecting orphaned positions:', error)
    logCriticalError('Orphan detection failed', {
      error: error instanceof Error ? error.message : String(error)
    })
  }
}