import { NextResponse } from 'next/server'
import { bitqueryService } from '../../../../lib/bitquery-service'

export async function POST(request) {
  try {
    const body = await request.json()
    const { symbol, side, amount, price, orderType = 'market' } = body

    console.log('🔄 Execute trade request:', { symbol, side, amount, price, orderType })

    // Validate inputs
    if (!symbol || !side || !amount) {
      return NextResponse.json(
        { 
          success: false, 
          error: 'Missing required fields: symbol, side, amount' 
        },
        { status: 400 }
      )
    }

    if (!['BUY', 'SELL'].includes(side.toUpperCase())) {
      return NextResponse.json(
        { 
          success: false, 
          error: 'Invalid side. Must be BUY or SELL' 
        },
        { status: 400 }
      )
    }

    if (amount <= 0) {
      return NextResponse.json(
        { 
          success: false, 
          error: 'Amount must be greater than 0' 
        },
        { status: 400 }
      )
    }

    // Check if Bitquery service is configured
    if (!bitqueryService.isConfigured()) {
      return NextResponse.json(
        { 
          success: false, 
          error: 'Bitquery service not configured' 
        },
        { status: 503 }
      )
    }

    // Execute the trade via Bitquery
    const tradeResult = await bitqueryService.executeTrade({
      symbol: symbol.toUpperCase(),
      side: side.toUpperCase(),
      amount: parseFloat(amount),
      price: price ? parseFloat(price) : undefined
    })

    if (!tradeResult.success) {
      return NextResponse.json(
        { 
          success: false, 
          error: tradeResult.error || 'Trade execution failed' 
        },
        { status: 500 }
      )
    }

    // Log the successful trade
    console.log('✅ Trade executed successfully:', tradeResult)

    // Return trade result
    return NextResponse.json({
      success: true,
      trade: {
        txId: tradeResult.txId,
        symbol: symbol.toUpperCase(),
        side: side.toUpperCase(),
        amount: tradeResult.executedAmount,
        executedPrice: tradeResult.executedPrice,
        timestamp: Date.now(),
        orderType,
        status: 'FILLED'
      },
      message: `${side.toUpperCase()} order for ${amount} ${symbol} executed at $${tradeResult.executedPrice?.toFixed(4)}`
    })

  } catch (error) {
    console.error('❌ Trade execution API error:', error)
    return NextResponse.json(
      { 
        success: false, 
        error: 'Internal server error',
        message: error.message 
      },
      { status: 500 }
    )
  }
}

export async function GET() {
  return NextResponse.json({
    message: 'Trading Execute API - use POST method to execute trades',
    endpoints: {
      POST: '/api/trading/execute - Execute a trade via Bitquery'
    },
    parameters: {
      symbol: 'string (required) - Trading symbol (e.g., SOL, BTC, ETH)',
      side: 'string (required) - BUY or SELL',
      amount: 'number (required) - Amount to trade',
      price: 'number (optional) - Limit price (market order if not provided)',
      orderType: 'string (optional) - market or limit (default: market)'
    }
  })
}
