/**
 * Remove Position from Tracking
 * 
 * Manually removes a position from Position Manager tracking
 * POST /api/trading/remove-position
 */

import { NextRequest, NextResponse } from 'next/server'
import { getInitializedPositionManager } from '@/lib/trading/position-manager'
import { updateTradeExit } from '@/lib/database/trades'

interface RemovePositionRequest {
  tradeId: string
  reason?: string
}

interface RemovePositionResponse {
  success: boolean
  message: string
  tradeId?: string
}

export async function POST(request: NextRequest): Promise<NextResponse<RemovePositionResponse>> {
  try {
    // Verify authorization
    const authHeader = request.headers.get('authorization')
    const expectedAuth = `Bearer ${process.env.API_SECRET_KEY}`
    
    if (!authHeader || authHeader !== expectedAuth) {
      return NextResponse.json(
        {
          success: false,
          message: 'Unauthorized',
        },
        { status: 401 }
      )
    }

    const body: RemovePositionRequest = await request.json()
    
    console.log('🗑️ Removing position from tracking:', body)
    
    if (!body.tradeId) {
      return NextResponse.json(
        {
          success: false,
          message: 'tradeId is required',
        },
        { status: 400 }
      )
    }

    // Get Position Manager
    const positionManager = await getInitializedPositionManager()
    
    // Check if position exists
    const activeTrades = positionManager.getActiveTrades()
    const trade = activeTrades.find(t => t.id === body.tradeId)
    
    if (!trade) {
      return NextResponse.json(
        {
          success: false,
          message: `Position ${body.tradeId} not found in tracking`,
        },
        { status: 404 }
      )
    }

    console.log(`📊 Found position: ${trade.symbol} ${trade.direction} at $${trade.entryPrice}`)
    
    // Remove from Position Manager
    positionManager.removeTrade(body.tradeId)
    
    console.log(`✅ Removed ${body.tradeId} from Position Manager`)
    
    // Update database to mark as closed (manually)
    try {
      const exitTime = new Date()
      const holdTime = Math.floor((exitTime.getTime() - new Date(trade.entryTime).getTime()) / 1000)
      
      await updateTradeExit({
        positionId: trade.positionId || 'manual-removal',
        exitPrice: trade.lastPrice || trade.entryPrice,
        exitReason: 'manual',
        realizedPnL: trade.unrealizedPnL,
        exitOrderTx: 'manual-removal',
        holdTimeSeconds: holdTime,
        maxDrawdown: trade.peakPnL < 0 ? trade.peakPnL : undefined,
        maxGain: trade.peakPnL > 0 ? trade.peakPnL : undefined,
      })
      console.log('💾 Updated database: trade marked as closed')
    } catch (dbError) {
      console.error('❌ Failed to update database:', dbError)
      // Don't fail the removal if database update fails
    }
    
    return NextResponse.json({
      success: true,
      message: `Position removed from tracking: ${trade.symbol} ${trade.direction}`,
      tradeId: body.tradeId,
    })

  } catch (error) {
    console.error('❌ Remove position error:', error)
    
    return NextResponse.json(
      {
        success: false,
        message: error instanceof Error ? error.message : 'Unknown error',
      },
      { status: 500 }
    )
  }
}