/**
 * Blocked Signal Price Tracker
 * 
 * Automatically tracks price movements for blocked signals to determine
 * if they would have been profitable trades. This enables data-driven
 * multi-timeframe analysis.
 * 
 * Features:
 * - Price tracking at 1min, 5min, 15min, 30min, 1hr, 2hr, 4hr, 8hr intervals
 * - TP1/TP2/SL hit detection using ATR-based targets
 * - Max favorable/adverse excursion tracking
 * - Automatic analysis completion after 8 hours or TP/SL hit
 * - Background job runs every 5 minutes
 * 
 * EXTENDED TRACKING (Dec 2, 2025):
 * - Previously tracked for 30 minutes only (missed slow developers)
 * - Now tracks for 8 hours to capture low ADX signals that take 4+ hours
 * - User directive: "30 minutes...simply not long enough to know whats going to happen"
 * - Purpose: Accurate win rate data for quality 80-89 signals
 */

import { getPrismaClient } from '../database/trades'
import { initializeDriftService } from '../drift/client'
import { getMergedConfig, SUPPORTED_MARKETS } from '../../config/trading'

interface BlockedSignalWithTracking {
  id: string
  symbol: string
  direction: 'long' | 'short'
  entryPrice: number
  atr: number
  adx: number
  createdAt: Date
  priceAfter1Min: number | null
  priceAfter5Min: number | null
  priceAfter15Min: number | null
  priceAfter30Min: number | null
  priceAfter1Hr: number | null
  priceAfter2Hr: number | null
  priceAfter4Hr: number | null
  priceAfter8Hr: number | null
  wouldHitTP1: boolean | null
  wouldHitTP2: boolean | null
  wouldHitSL: boolean | null
  maxFavorablePrice: number | null
  maxAdversePrice: number | null
  maxFavorableExcursion: number | null
  maxAdverseExcursion: number | null
  analysisComplete: boolean
}

export class BlockedSignalTracker {
  private prisma = getPrismaClient()
  private intervalId: NodeJS.Timeout | null = null
  private isRunning = false

  /**
   * Start the background tracking job
   * Runs every 5 minutes to update price data for blocked signals
   */
  public start(): void {
    if (this.isRunning) {
      console.log('⚠️ Blocked signal tracker already running')
      return
    }

    console.log('🔬 Starting blocked signal price tracker...')
    this.isRunning = true

    // Run immediately on start
    this.trackPrices().catch(error => {
      console.error('❌ Error in initial price tracking:', error)
    })

    // Then run every 5 minutes
    this.intervalId = setInterval(() => {
      this.trackPrices().catch(error => {
        console.error('❌ Error in price tracking:', error)
      })
    }, 5 * 60 * 1000) // 5 minutes

    console.log('✅ Blocked signal tracker started (runs every 5 minutes)')
  }

  /**
   * Stop the background tracking job
   */
  public stop(): void {
    if (this.intervalId) {
      clearInterval(this.intervalId)
      this.intervalId = null
    }
    this.isRunning = false
    console.log('⏹️ Blocked signal tracker stopped')
  }

  /**
   * Main tracking logic - processes all incomplete blocked signals
   */
  private async trackPrices(): Promise<void> {
    try {
      // Initialize Drift service if needed
      const driftService = await initializeDriftService()
      if (!driftService) {
        console.log('⚠️ Drift service not available, skipping price tracking')
        return
      }

      // Get all incomplete signals from last 48 hours (extended for 8hr tracking)
      // Track BOTH quality-blocked AND data collection signals
      const signals = await this.prisma.blockedSignal.findMany({
        where: {
          blockReason: {
            in: ['DATA_COLLECTION_ONLY', 'QUALITY_SCORE_TOO_LOW']
          },
          analysisComplete: false,
          createdAt: {
            gte: new Date(Date.now() - 48 * 60 * 60 * 1000) // Last 48 hours (8hr tracking + buffer)
          }
        },
        orderBy: { createdAt: 'asc' }
      })

      if (signals.length === 0) {
        console.log('📊 No blocked signals to track')
        return
      }

      console.log(`📊 Tracking ${signals.length} blocked signals...`)

      for (const signal of signals) {
        await this.trackSignal(signal as any)
      }

      console.log(`✅ Price tracking complete for ${signals.length} signals`)
    } catch (error) {
      console.error('❌ Error in trackPrices:', error)
    }
  }

  /**
   * Track a single blocked signal
   */
  private async trackSignal(signal: BlockedSignalWithTracking): Promise<void> {
    try {
      const now = Date.now()
      const signalTime = signal.createdAt.getTime()
      const elapsedMinutes = (now - signalTime) / (60 * 1000)

      // Get current price from Drift oracle
      const driftService = await initializeDriftService()
      const marketConfig = SUPPORTED_MARKETS[signal.symbol]
      
      if (!marketConfig) {
        console.log(`⚠️ No market config for ${signal.symbol}, skipping`)
        return
      }

      const currentPrice = await driftService.getOraclePrice(marketConfig.driftMarketIndex)
      const entryPrice = Number(signal.entryPrice)
      
      if (entryPrice === 0) {
        console.log(`⚠️ Entry price is 0 for ${signal.symbol}, skipping`)
        return
      }

      // Calculate profit percentage
      const profitPercent = this.calculateProfitPercent(
        entryPrice,
        currentPrice,
        signal.direction
      )

      // Calculate TP/SL levels using ATR
      const config = getMergedConfig()
      const { tp1Percent, tp2Percent, slPercent } = this.calculateTargets(
        Number(signal.atr),
        entryPrice,
        config
      )

      // Update prices at intervals
      const updates: any = {}

      if (elapsedMinutes >= 1 && !signal.priceAfter1Min) {
        updates.priceAfter1Min = currentPrice
        console.log(`  📍 ${signal.symbol} ${signal.direction} @ 1min: $${currentPrice.toFixed(2)} (${profitPercent.toFixed(2)}%)`)
      }

      if (elapsedMinutes >= 5 && !signal.priceAfter5Min) {
        updates.priceAfter5Min = currentPrice
        console.log(`  📍 ${signal.symbol} ${signal.direction} @ 5min: $${currentPrice.toFixed(2)} (${profitPercent.toFixed(2)}%)`)
      }

      if (elapsedMinutes >= 15 && !signal.priceAfter15Min) {
        updates.priceAfter15Min = currentPrice
        console.log(`  📍 ${signal.symbol} ${signal.direction} @ 15min: $${currentPrice.toFixed(2)} (${profitPercent.toFixed(2)}%)`)
      }

      if (elapsedMinutes >= 30 && !signal.priceAfter30Min) {
        updates.priceAfter30Min = currentPrice
        console.log(`  📍 ${signal.symbol} ${signal.direction} @ 30min: $${currentPrice.toFixed(2)} (${profitPercent.toFixed(2)}%)`)
      }

      // EXTENDED TRACKING (Dec 2, 2025): Track up to 8 hours for slow developers
      if (elapsedMinutes >= 60 && !signal.priceAfter1Hr) {
        updates.priceAfter1Hr = currentPrice
        console.log(`  📍 ${signal.symbol} ${signal.direction} @ 1hr: $${currentPrice.toFixed(2)} (${profitPercent.toFixed(2)}%)`)
      }

      if (elapsedMinutes >= 120 && !signal.priceAfter2Hr) {
        updates.priceAfter2Hr = currentPrice
        console.log(`  📍 ${signal.symbol} ${signal.direction} @ 2hr: $${currentPrice.toFixed(2)} (${profitPercent.toFixed(2)}%)`)
      }

      if (elapsedMinutes >= 240 && !signal.priceAfter4Hr) {
        updates.priceAfter4Hr = currentPrice
        console.log(`  📍 ${signal.symbol} ${signal.direction} @ 4hr: $${currentPrice.toFixed(2)} (${profitPercent.toFixed(2)}%)`)
      }

      if (elapsedMinutes >= 480 && !signal.priceAfter8Hr) {
        updates.priceAfter8Hr = currentPrice
        console.log(`  📍 ${signal.symbol} ${signal.direction} @ 8hr: $${currentPrice.toFixed(2)} (${profitPercent.toFixed(2)}%)`)
      }

      // Mark complete after 8 hours OR if TP/SL already hit
      if (elapsedMinutes >= 480 && !signal.analysisComplete) {
        updates.analysisComplete = true
        console.log(`  ✅ ${signal.symbol} ${signal.direction} @ 8hr: TRACKING COMPLETE`)
      }

      // Early completion if TP1/TP2/SL hit (no need to wait full 8 hours)
      if (!signal.analysisComplete && (signal.wouldHitTP1 || signal.wouldHitTP2 || signal.wouldHitSL)) {
        updates.analysisComplete = true
        const hitReason = signal.wouldHitTP1 ? 'TP1' : signal.wouldHitTP2 ? 'TP2' : 'SL'
        console.log(`  ✅ ${signal.symbol} ${signal.direction}: ${hitReason} hit at ${profitPercent.toFixed(2)}% - TRACKING COMPLETE`)
      }

      // Update max favorable/adverse excursion
      const currentMFE = signal.maxFavorableExcursion || 0
      const currentMAE = signal.maxAdverseExcursion || 0

      if (profitPercent > currentMFE) {
        updates.maxFavorableExcursion = profitPercent
        updates.maxFavorablePrice = currentPrice
      }

      if (profitPercent < currentMAE) {
        updates.maxAdverseExcursion = profitPercent
        updates.maxAdversePrice = currentPrice
      }

      // Check if TP1/TP2/SL would have been hit
      if (signal.wouldHitTP1 === null && Math.abs(profitPercent) >= tp1Percent) {
        updates.wouldHitTP1 = profitPercent > 0
        console.log(`  🎯 ${signal.symbol} ${signal.direction} hit ${profitPercent > 0 ? 'TP1' : 'SL'} (${profitPercent.toFixed(2)}%)`)
      }

      if (signal.wouldHitTP2 === null && Math.abs(profitPercent) >= tp2Percent) {
        updates.wouldHitTP2 = profitPercent > 0
        console.log(`  🎯 ${signal.symbol} ${signal.direction} hit TP2 (${profitPercent.toFixed(2)}%)`)
      }

      if (signal.wouldHitSL === null && profitPercent <= -slPercent) {
        updates.wouldHitSL = true
        console.log(`  🛑 ${signal.symbol} ${signal.direction} hit SL (${profitPercent.toFixed(2)}%)`)
      }

      // Update database if we have changes
      if (Object.keys(updates).length > 0) {
        await this.prisma.blockedSignal.update({
          where: { id: signal.id },
          data: updates
        })
      }
    } catch (error) {
      console.error(`❌ Error tracking signal ${signal.id}:`, error)
    }
  }

  /**
   * Calculate profit percentage based on direction
   */
  private calculateProfitPercent(
    entryPrice: number,
    currentPrice: number,
    direction: 'long' | 'short'
  ): number {
    if (direction === 'long') {
      return ((currentPrice - entryPrice) / entryPrice) * 100
    } else {
      return ((entryPrice - currentPrice) / entryPrice) * 100
    }
  }

  /**
   * Calculate TP/SL targets using ATR
   */
  private calculateTargets(
    atr: number,
    entryPrice: number,
    config: any
  ): { tp1Percent: number; tp2Percent: number; slPercent: number } {
    // ATR as percentage of price
    const atrPercent = (atr / entryPrice) * 100

    // TP1: ATR × 2.0 multiplier
    let tp1Percent = atrPercent * config.atrMultiplierTp1
    tp1Percent = Math.max(config.minTp1Percent, Math.min(config.maxTp1Percent, tp1Percent))

    // TP2: ATR × 4.0 multiplier
    let tp2Percent = atrPercent * config.atrMultiplierTp2
    tp2Percent = Math.max(config.minTp2Percent, Math.min(config.maxTp2Percent, tp2Percent))

    // SL: ATR × 3.0 multiplier
    let slPercent = atrPercent * config.atrMultiplierSl
    slPercent = Math.max(config.minSlPercent, Math.min(config.maxSlPercent, slPercent))

    return { tp1Percent, tp2Percent, slPercent }
  }
}

// Singleton instance
let trackerInstance: BlockedSignalTracker | null = null

export function getBlockedSignalTracker(): BlockedSignalTracker {
  if (!trackerInstance) {
    trackerInstance = new BlockedSignalTracker()
  }
  return trackerInstance
}

export function startBlockedSignalTracking(): void {
  const tracker = getBlockedSignalTracker()
  tracker.start()
}

export function stopBlockedSignalTracking(): void {
  if (trackerInstance) {
    trackerInstance.stop()
  }
}