import { NextResponse } from 'next/server';

export async function GET() {
  try {
    // Get current positions with real-time data
    const baseUrl = process.env.INTERNAL_API_URL || 'http://localhost:3000';
    const positionsResponse = await fetch(`${baseUrl}/api/drift/positions`, {
      cache: 'no-store', // Force fresh data
      headers: {
        'Cache-Control': 'no-cache'
      }
    });
    const positionsData = await positionsResponse.json();
    
    // Use real-time price from Drift positions data
    let currentPrice = 185.0; // Fallback price
    
    const result = {
      timestamp: new Date().toISOString(),
      hasPosition: false,
      position: null,
      stopLossProximity: null,
      riskLevel: 'NONE',
      nextAction: 'No position to monitor',
      recommendation: 'START_TRADING',
      orphanedOrderCleanup: null
    };
    
    if (positionsData.success && positionsData.positions.length > 0) {
      const position = positionsData.positions[0];
      
      // Use real-time mark price from Drift
      currentPrice = position.markPrice || position.entryPrice || currentPrice;
      
      result.hasPosition = true;
      result.position = {
        symbol: position.symbol,
        side: position.side,
        size: position.size,
        entryPrice: position.entryPrice,
        currentPrice: currentPrice,
        unrealizedPnl: position.unrealizedPnl,
        notionalValue: position.notionalValue
      };
      
      // Calculate stop loss proximity (mock - you'd need actual SL from order data)
      let stopLossPrice;
      if (position.side === 'long') {
        stopLossPrice = position.entryPrice * 0.95; // 5% below entry
      } else {
        stopLossPrice = position.entryPrice * 1.05; // 5% above entry  
      }
      
      const distanceToSL = Math.abs(currentPrice - stopLossPrice) / currentPrice;
      const proximityPercent = distanceToSL * 100;
      
      result.stopLossProximity = {
        stopLossPrice: stopLossPrice,
        currentPrice: currentPrice,
        distancePercent: proximityPercent.toFixed(2),
        isNear: proximityPercent < 2.0 // Within 2% = NEAR
      };
      
      // Risk assessment
      if (proximityPercent < 1.0) {
        result.riskLevel = 'CRITICAL';
        result.nextAction = 'IMMEDIATE ANALYSIS REQUIRED - Price very close to SL';
        result.recommendation = 'EMERGENCY_ANALYSIS';
      } else if (proximityPercent < 2.0) {
        result.riskLevel = 'HIGH';
        result.nextAction = 'Enhanced monitoring - Analyze within 5 minutes';
        result.recommendation = 'URGENT_MONITORING';
      } else if (proximityPercent < 5.0) {
        result.riskLevel = 'MEDIUM';
        result.nextAction = 'Regular monitoring - Check every 10 minutes';
        result.recommendation = 'NORMAL_MONITORING';
      } else {
        result.riskLevel = 'LOW';
        result.nextAction = 'Standard monitoring - Check every 30 minutes';
        result.recommendation = 'RELAXED_MONITORING';
      }
    } else {
      // NO POSITION DETECTED - Check for orphaned orders and cleanup
      
      try {
        // Check for any remaining orders when we have no positions
        const ordersResponse = await fetch(`${baseUrl}/api/drift/orders`, {
          cache: 'no-store',
          headers: {
            'Cache-Control': 'no-cache'
          }
        });
        
        if (ordersResponse.ok) {
          const ordersData = await ordersResponse.json();
          const activeOrders = ordersData.orders || [];
          
          if (activeOrders.length > 0) {
            console.log('📋 No active positions detected - checking for truly orphaned orders...');
            
            // Filter for truly orphaned orders (non-reduce-only orders without positions)
            // Do NOT clean up reduce-only orders as these could be legitimate SL/TP from recently closed positions
            const trulyOrphanedOrders = activeOrders.filter(order => !order.reduceOnly);
            
            if (trulyOrphanedOrders.length > 0) {
              console.log(`🎯 Found ${trulyOrphanedOrders.length} truly orphaned orders (non-reduce-only) - triggering cleanup...`);
              
              // Trigger automated cleanup of truly orphaned orders only
              const cleanupResponse = await fetch(`${baseUrl}/api/drift/cleanup-orders`, {
                method: 'POST',
                headers: {
                  'Content-Type': 'application/json'
                }
              });
              
              let cleanupResult = null;
              if (cleanupResponse.ok) {
                cleanupResult = await cleanupResponse.json();
                
                if (cleanupResult.success) {
                  console.log('✅ Orphaned order cleanup completed:', cleanupResult.summary);
                  result.orphanedOrderCleanup = {
                    triggered: true,
                    success: true,
                    summary: cleanupResult.summary,
                    message: `Cleaned up ${cleanupResult.summary.totalCanceled} truly orphaned orders`
                  };
                  result.nextAction = `Cleaned up ${cleanupResult.summary.totalCanceled} orphaned orders - Ready for new trade`;
                } else {
                  console.error('❌ Orphaned order cleanup failed:', cleanupResult.error);
                  result.orphanedOrderCleanup = {
                    triggered: true,
                    success: false,
                    error: cleanupResult.error,
                    message: 'Cleanup failed - Manual intervention may be needed'
                  };
                  result.nextAction = 'Cleanup failed - Check orders manually';
                }
              } else {
                console.error('❌ Failed to trigger cleanup API');
                result.orphanedOrderCleanup = {
                  triggered: false,
                  success: false,
                  error: 'Cleanup API unavailable',
                  message: 'Could not trigger automatic cleanup'
                };
              }
            } else {
              // All orders are reduce-only (likely SL/TP) - do not clean up
              console.log('✅ All remaining orders are reduce-only (likely SL/TP) - skipping cleanup to preserve risk management');
              result.orphanedOrderCleanup = {
                triggered: false,
                success: true,
                message: 'All orders are reduce-only (SL/TP) - preserved for risk management'
              };
            }
          } else {
            // Only log occasionally when no orders found (not every check)
            result.orphanedOrderCleanup = {
              triggered: false,
              success: true,
              message: 'No orphaned orders detected'
            };
          }
        }
      } catch (cleanupError) {
        console.error('❌ Error during orphaned order check:', cleanupError);
        result.orphanedOrderCleanup = {
          triggered: false,
          success: false,
          error: cleanupError.message,
          message: 'Error checking for orphaned orders'
        };
      }
    }
    
    // Auto-restart automation if no position and cleanup completed successfully
    if (!result.hasPosition && result.recommendation === 'START_TRADING') {
      try {
        console.log('🚀 AUTO-RESTART: No position detected with START_TRADING recommendation - checking if automation should restart');
        
        // Check if automation is currently stopped
        const statusResponse = await fetch(`${baseUrl}/api/automation/status`);
        if (statusResponse.ok) {
          const statusData = await statusResponse.json();
          
          if (!statusData.isRunning) {
            console.log('🔄 Automation is stopped - triggering auto-restart for new cycle');
            result.autoRestart = {
              triggered: true,
              reason: 'No position + START_TRADING recommendation',
              message: 'System ready for new trading cycle'
            };
            
            // Note: We don't automatically start here to avoid conflicts
            // The UI should detect this and offer restart option
          } else {
            console.log('✅ Automation already running - no restart needed');
            result.autoRestart = {
              triggered: false,
              reason: 'Automation already active',
              message: 'System monitoring active'
            };
          }
        }
      } catch (restartError) {
        console.warn('⚠️ Could not check automation status for auto-restart:', restartError.message);
        result.autoRestart = {
          triggered: false,
          error: restartError.message,
          message: 'Could not check restart requirements'
        };
      }
    }
    
    return NextResponse.json({
      success: true,
      monitor: result
    });
    
  } catch (error) {
    console.error('Position monitor error:', error);
    return NextResponse.json({
      success: false,
      error: 'Failed to get position monitoring data',
      message: error.message
    }, { status: 500 });
  }
}