import { NextResponse } from 'next/server'
import { PrismaClient } from '@prisma/client'
import fs from 'fs'
import path from 'path'

const prisma = new PrismaClient()

export async function GET(request, { params }) {
  try {
    const { id } = params
    
    // Mock detailed trade data with screenshots
    const mockTradeDetails = {
      'demo-trade-1': {
        id: 'demo-trade-1',
        side: 'BUY',
        amount: 1.5,
        tradingAmount: 100,
        leverage: 1,
        positionSize: 100,
        price: 174.25,
        status: 'OPEN',
        entryTime: new Date(Date.now() - 30 * 60 * 1000).toISOString(),
        exitTime: null,
        confidence: 78,
        
        // Analysis screenshots
        screenshots: {
          aiLayout: {
            url: '/screenshots/demo-trade-1-ai-layout.png',
            title: 'AI Layout Analysis',
            description: 'Multi-timeframe analysis showing BUY signal with RSI oversold and MACD bullish crossover'
          },
          diyLayout: {
            url: '/screenshots/demo-trade-1-diy-layout.png',
            title: 'DIY Layout Analysis',
            description: 'Custom indicators showing support bounce confirmation and volume spike'
          },
          overview: {
            url: '/screenshots/demo-trade-1-overview.png',
            title: 'Market Overview',
            description: 'Full market context with key levels and trend analysis'
          }
        },
        
        // Detailed analysis that triggered the trade
        detailedAnalysis: {
          timestamp: new Date(Date.now() - 30 * 60 * 1000).toISOString(),
          decision: 'BUY',
          confidence: 78,
          overallSentiment: 'BULLISH',
          
          // Multi-timeframe analysis
          timeframes: {
            '15m': {
              decision: 'BUY',
              confidence: 75,
              signals: ['RSI oversold (28)', 'Price bouncing from support'],
              trend: 'BULLISH'
            },
            '1h': {
              decision: 'BUY',
              confidence: 80,
              signals: ['MACD bullish crossover', 'Volume spike on bounce'],
              trend: 'BULLISH'
            },
            '2h': {
              decision: 'BUY',
              confidence: 72,
              signals: ['Support level holding', 'Bullish divergence'],
              trend: 'NEUTRAL'
            },
            '4h': {
              decision: 'BUY',
              confidence: 75,
              signals: ['Higher lows pattern', 'EMA support'],
              trend: 'BULLISH'
            }
          },
          
          // Key levels identified
          keyLevels: {
            entry: {
              price: 174.25,
              rationale: 'Support bounce with high volume confirmation'
            },
            stopLoss: {
              price: 172.50,
              rationale: 'Below key support level with 1% risk'
            },
            takeProfit: {
              price: 178.00,
              rationale: 'Previous resistance level with 2.2:1 R/R ratio'
            }
          },
          
          // Risk management
          riskManagement: {
            riskReward: '1:2.2',
            riskPercentage: 1.75,
            positionSize: 100,
            maxDrawdown: 1.75,
            expectedValue: 'Positive based on historical similar setups'
          },
          
          // Technical indicators
          technicalIndicators: {
            rsi: {
              value: 28,
              interpretation: 'Oversold - potential reversal signal'
            },
            macd: {
              value: 0.125,
              interpretation: 'Bullish crossover - momentum building'
            },
            volume: {
              value: 'Above average',
              interpretation: 'Strong buying interest at support'
            },
            movingAverages: {
              ema20: 173.85,
              ema50: 172.90,
              interpretation: 'Price above key EMAs - bullish structure'
            }
          },
          
          // Market context
          marketContext: {
            overallTrend: 'BULLISH',
            marketPhase: 'Correction within uptrend',
            volatility: 'Moderate',
            newsEvents: 'No major events expected',
            correlations: 'Positive correlation with crypto market'
          },
          
          // AI reasoning
          aiReasoning: `
            Multi-timeframe analysis indicates a high-probability BUY setup:
            
            1. Technical Setup: RSI oversold (28) with MACD bullish crossover
            2. Price Action: Clean bounce from key support level at 174.00
            3. Volume Confirmation: Above-average volume on the bounce
            4. Risk/Reward: Excellent 1:2.2 ratio with clear stop loss
            5. Market Context: Correction within overall bullish trend
            
            The combination of oversold conditions, support bounce, and volume confirmation
            provides a high-confidence entry point with favorable risk/reward.
          `,
          
          // Execution plan
          executionPlan: {
            entry: 'Market buy at 174.25',
            stopLoss: 'Set at 172.50 (1.75% risk)',
            takeProfit: 'Target 178.00 (2.2:1 R/R)',
            positionSize: '$100 with 1x leverage',
            monitoring: 'Monitor for volume continuation and trend strength'
          }
        }
      },
      
      'demo-trade-2': {
        id: 'demo-trade-2',
        side: 'SELL',
        amount: 2.04,
        tradingAmount: 100,
        leverage: 1,
        positionSize: 100,
        price: 176.88,
        status: 'COMPLETED',
        entryTime: new Date(Date.now() - 2 * 60 * 60 * 1000).toISOString(),
        exitTime: new Date(Date.now() - 2 * 60 * 60 * 1000 + 85 * 60 * 1000).toISOString(),
        confidence: 85,
        profit: 3.24,
        
        screenshots: {
          aiLayout: {
            url: '/screenshots/demo-trade-2-ai-layout.png',
            title: 'AI Layout Analysis',
            description: 'Resistance rejection pattern with RSI overbought and bearish divergence'
          },
          diyLayout: {
            url: '/screenshots/demo-trade-2-diy-layout.png',
            title: 'DIY Layout Analysis',
            description: 'Distribution pattern at key resistance with volume confirmation'
          },
          overview: {
            url: '/screenshots/demo-trade-2-overview.png',
            title: 'Market Overview',
            description: 'Clear resistance level rejection with bearish momentum building'
          }
        },
        
        detailedAnalysis: {
          timestamp: new Date(Date.now() - 2 * 60 * 60 * 1000).toISOString(),
          decision: 'SELL',
          confidence: 85,
          overallSentiment: 'BEARISH',
          
          timeframes: {
            '15m': {
              decision: 'SELL',
              confidence: 88,
              signals: ['RSI overbought (72)', 'Resistance rejection'],
              trend: 'BEARISH'
            },
            '1h': {
              decision: 'SELL',
              confidence: 85,
              signals: ['Bearish divergence', 'Volume on rejection'],
              trend: 'BEARISH'
            },
            '2h': {
              decision: 'SELL',
              confidence: 80,
              signals: ['Distribution pattern', 'Lower highs'],
              trend: 'BEARISH'
            },
            '4h': {
              decision: 'SELL',
              confidence: 82,
              signals: ['Key resistance level', 'Momentum shift'],
              trend: 'BEARISH'
            }
          },
          
          keyLevels: {
            entry: {
              price: 176.88,
              rationale: 'Resistance rejection with high volume'
            },
            stopLoss: {
              price: 178.50,
              rationale: 'Above resistance with 0.9% risk'
            },
            takeProfit: {
              price: 174.20,
              rationale: 'Support level with 1.6:1 R/R ratio'
            }
          },
          
          riskManagement: {
            riskReward: '1:1.6',
            riskPercentage: 0.9,
            positionSize: 100,
            maxDrawdown: 0.9,
            expectedValue: 'Positive based on resistance rejection pattern'
          },
          
          technicalIndicators: {
            rsi: {
              value: 72,
              interpretation: 'Overbought - potential reversal signal'
            },
            macd: {
              value: -0.085,
              interpretation: 'Bearish divergence - momentum weakening'
            },
            volume: {
              value: 'High on rejection',
              interpretation: 'Strong selling pressure at resistance'
            },
            movingAverages: {
              ema20: 176.45,
              ema50: 175.20,
              interpretation: 'Resistance at key EMA levels'
            }
          },
          
          marketContext: {
            overallTrend: 'BEARISH',
            marketPhase: 'Distribution at resistance',
            volatility: 'Moderate',
            newsEvents: 'No major events',
            correlations: 'Negative correlation with broader market'
          },
          
          aiReasoning: `
            High-confidence SELL setup based on resistance rejection:
            
            1. Technical Setup: RSI overbought (72) with bearish divergence
            2. Price Action: Clear rejection at key resistance level
            3. Volume Confirmation: High volume on the rejection candle
            4. Risk/Reward: Good 1:1.6 ratio with tight stop loss
            5. Market Context: Distribution pattern at resistance
            
            The combination of overbought conditions, resistance rejection, and volume
            confirmation provides excellent entry with favorable risk/reward profile.
          `,
          
          executionPlan: {
            entry: 'Market sell at 176.88',
            stopLoss: 'Set at 178.50 (0.9% risk)',
            takeProfit: 'Target 174.20 (1.6:1 R/R)',
            positionSize: '$100 with 1x leverage',
            monitoring: 'Monitor for break below support levels'
          }
        }
      }
    }
    
    const tradeDetails = mockTradeDetails[id]
    
    if (!tradeDetails) {
      return NextResponse.json({ 
        success: false, 
        error: 'Trade not found' 
      }, { status: 404 })
    }
    
    return NextResponse.json({
      success: true,
      data: tradeDetails
    })
    
  } catch (error) {
    console.error('Error fetching trade details:', error)
    return NextResponse.json({ 
      success: false, 
      error: 'Failed to fetch trade details' 
    }, { status: 500 })
  }
}