/**
 * Test Database Trade Endpoint
 * 
 * Creates small test trades to verify database functionality
 * POST /api/trading/test-db
 */

import { NextRequest, NextResponse } from 'next/server'
import { initializeDriftService } from '@/lib/drift/client'
import { openPosition, placeExitOrders } from '@/lib/drift/orders'
import { getMergedConfig } from '@/config/trading'
import { getInitializedPositionManager, ActiveTrade } from '@/lib/trading/position-manager'
import { createTrade } from '@/lib/database/trades'

export interface TestTradeRequest {
  symbol?: string // Default: 'SOL-PERP'
  direction?: 'long' | 'short' // Default: 'long'
  sizeUSD?: number // Default: $10
  leverage?: number // Default: 1x
}

export interface TestTradeResponse {
  success: boolean
  message?: string
  trade?: {
    id: string
    positionId: string
    symbol: string
    direction: 'long' | 'short'
    entryPrice: number
    positionSize: number
    leverage: number
  }
  error?: string
}

export async function POST(request: NextRequest): Promise<NextResponse<TestTradeResponse>> {
  try {
    console.log('🧪 Test trade request received')
    
    // Parse request body
    const body: TestTradeRequest = await request.json().catch(() => ({}))
    
    // Use minimal settings for test trade
    const symbol = body.symbol || 'SOL-PERP'
    const direction = body.direction || 'long'
    const baseSize = body.sizeUSD || 10 // $10 base collateral
    const leverage = body.leverage || 1 // 1x leverage (safe)
    
    // IMPORTANT: For Drift, we pass the BASE size (collateral), not notional
    // Drift internally applies the leverage
    const positionSizeUSD = baseSize // This is the actual collateral/margin used
    const notionalSize = baseSize * leverage // This is what shows in Drift UI
    
    console.log(`🧪 Creating TEST trade:`)
    console.log(`   Symbol: ${symbol}`)
    console.log(`   Direction: ${direction}`)
    console.log(`   Collateral: $${baseSize}`)
    console.log(`   Leverage: ${leverage}x`)
    console.log(`   Notional size: $${notionalSize} (what you'll see in Drift)`)
    console.log(`   ⚠️  Marked as TEST TRADE`)

    // Get base config but override with test settings
    const config = getMergedConfig({
      positionSize: baseSize,
      leverage: leverage,
      stopLossPercent: -1.5,
      takeProfit1Percent: 0.7,
      takeProfit2Percent: 1.5,
    })
    
    // Initialize Drift service
    const driftService = await initializeDriftService()
    
    // Check account health
    const health = await driftService.getAccountHealth()
    console.log('💊 Account health:', health)
    
    if (health.freeCollateral <= 0) {
      return NextResponse.json(
        {
          success: false,
          error: 'Insufficient collateral',
          message: `Free collateral: $${health.freeCollateral.toFixed(2)}`,
        },
        { status: 400 }
      )
    }

    // Open position
    const openResult = await openPosition({
      symbol,
      direction,
      sizeUSD: positionSizeUSD,
      slippageTolerance: config.slippageTolerance,
    })

    if (!openResult.success) {
      return NextResponse.json(
        {
          success: false,
          error: 'Position open failed',
          message: openResult.error,
        },
        { status: 500 }
      )
    }

    const entryPrice = openResult.fillPrice!
    
    // Calculate exit prices
    const calculatePrice = (entry: number, percent: number, dir: 'long' | 'short') => {
      if (dir === 'long') {
        return entry * (1 + percent / 100)
      } else {
        return entry * (1 - percent / 100)
      }
    }
    
    const stopLossPrice = calculatePrice(entryPrice, config.stopLossPercent, direction)
    const tp1Price = calculatePrice(entryPrice, config.takeProfit1Percent, direction)
    const tp2Price = calculatePrice(entryPrice, config.takeProfit2Percent, direction)
    const emergencyStopPrice = calculatePrice(entryPrice, config.emergencyStopPercent, direction)

    console.log('📊 Test trade targets:')
    console.log(`   Entry: $${entryPrice.toFixed(4)}`)
    console.log(`   SL: $${stopLossPrice.toFixed(4)} (${config.stopLossPercent}%)`)
    console.log(`   TP1: $${tp1Price.toFixed(4)} (${config.takeProfit1Percent}%)`)
    console.log(`   TP2: $${tp2Price.toFixed(4)} (${config.takeProfit2Percent}%)`)

    // Place exit orders
    let exitOrderSignatures: string[] = []
    try {
      const exitRes = await placeExitOrders({
        symbol,
        positionSizeUSD,
        entryPrice,
        tp1Price,
        tp2Price,
        stopLossPrice,
        tp1SizePercent: config.takeProfit1SizePercent || 50,
        tp2SizePercent: config.takeProfit2SizePercent || 100,
        direction,
        useDualStops: config.useDualStops,
        softStopPrice: config.useDualStops ? calculatePrice(entryPrice, config.softStopPercent, direction) : undefined,
        softStopBuffer: config.softStopBuffer,
        hardStopPrice: config.useDualStops ? calculatePrice(entryPrice, config.hardStopPercent, direction) : undefined,
      })

      if (exitRes.success && exitRes.signatures) {
        exitOrderSignatures = exitRes.signatures
        console.log('📨 Exit orders placed:', exitRes.signatures)
      }
    } catch (err) {
      console.error('❌ Failed to place exit orders:', err)
    }

    // Create active trade object for position manager
    const activeTrade: ActiveTrade = {
      id: `test-trade-${Date.now()}`,
      positionId: openResult.transactionSignature!,
      symbol,
      direction,
      entryPrice,
      entryTime: Date.now(),
      positionSize: positionSizeUSD,
      leverage,
      stopLossPrice,
      tp1Price,
      tp2Price,
      emergencyStopPrice,
      currentSize: positionSizeUSD,
      originalPositionSize: positionSizeUSD, // Store original size for P&L
      takeProfitPrice1: tp1Price,
      takeProfitPrice2: tp2Price,
      tp1Hit: false,
      tp2Hit: false,
      slMovedToBreakeven: false,
      slMovedToProfit: false,
      trailingStopActive: false,
      realizedPnL: 0,
      unrealizedPnL: 0,
      peakPnL: 0,
      peakPrice: entryPrice,
      maxFavorableExcursion: 0,
      maxAdverseExcursion: 0,
      maxFavorablePrice: entryPrice,
      maxAdversePrice: entryPrice,
      priceCheckCount: 0,
      lastPrice: entryPrice,
      lastUpdateTime: Date.now(),
    }

    // Add to position manager
    const positionManager = await getInitializedPositionManager()
    await positionManager.addTrade(activeTrade)
    console.log('✅ Test trade added to position manager')

    // Save to database with TEST flag
    try {
      const dbTrade = await createTrade({
        positionId: openResult.transactionSignature!,
        symbol,
        direction,
        entryPrice,
        entrySlippage: openResult.slippage,
        positionSizeUSD,
        leverage,
        stopLossPrice,
        takeProfit1Price: tp1Price,
        takeProfit2Price: tp2Price,
        tp1SizePercent: config.takeProfit1SizePercent || 50,
        tp2SizePercent: config.takeProfit2SizePercent || 100,
        configSnapshot: config,
        entryOrderTx: openResult.transactionSignature!,
        tp1OrderTx: exitOrderSignatures[0],
        tp2OrderTx: exitOrderSignatures[1],
        slOrderTx: config.useDualStops ? undefined : exitOrderSignatures[2],
        softStopOrderTx: config.useDualStops ? exitOrderSignatures[2] : undefined,
        hardStopOrderTx: config.useDualStops ? exitOrderSignatures[3] : undefined,
        signalSource: 'test-api',
        signalStrength: 'test',
        timeframe: 'test',
        isTestTrade: true, // Mark as test trade
      })
      
      console.log('💾✅ Test trade saved to database with ID:', dbTrade.id)
      console.log('🏷️  Trade marked as TEST - will be excluded from analytics')

      return NextResponse.json({
        success: true,
        message: `✅ Test trade created! Collateral: $${baseSize} | Leverage: ${leverage}x | Notional: $${notionalSize} ${direction} on ${symbol}`,
        trade: {
          id: dbTrade.id,
          positionId: openResult.transactionSignature!,
          symbol,
          direction,
          entryPrice,
          positionSize: positionSizeUSD,
          notionalSize: notionalSize,
          leverage,
        },
      })
      
    } catch (dbError) {
      console.error('❌ Failed to save test trade to database:', dbError)
      
      return NextResponse.json({
        success: false,
        error: 'Database save failed',
        message: dbError instanceof Error ? dbError.message : 'Unknown database error',
      }, { status: 500 })
    }

  } catch (error) {
    console.error('❌ Test trade execution error:', error)
    
    return NextResponse.json(
      {
        success: false,
        error: 'Internal server error',
        message: error instanceof Error ? error.message : 'Unknown error',
      },
      { status: 500 }
    )
  }
}