import { NextRequest, NextResponse } from 'next/server';
import { getServerSession } from 'next-auth/next';
import { authOptions } from '@/app/api/auth/[...nextauth]/route';
import { cleanupUserSessions } from '@/lib/redis';
import { closeUserImapConnections } from '@/lib/services/email-service';

/**
 * API endpoint to clean up user sessions and invalidate cached data
 * Called during logout to ensure proper cleanup of all connections
 */
export async function POST(request: NextRequest) {
  try {
    // Get the user ID either from the session or request body
    const session = await getServerSession(authOptions);
    const body = await request.json().catch(() => ({}));
    
    // Get user ID from session or from request body
    const userId = session?.user?.id || body.userId;
    
    if (!userId) {
      return NextResponse.json({ 
        success: false, 
        error: 'No user ID provided or user not authenticated' 
      }, { status: 400 });
    }
    
    console.log(`Processing session cleanup for user ${userId}`);
    
    // 1. Close any active IMAP connections using the dedicated function
    const closedConnections = await closeUserImapConnections(userId);
    
    // 2. Clean up Redis data
    await cleanupUserSessions(userId);
    
    // 3. Return success response with details
    return NextResponse.json({ 
      success: true, 
      message: `Session cleanup completed for user ${userId}`,
      details: {
        closedConnections,
        redisCleanupPerformed: true
      }
    });
  } catch (error) {
    console.error('Error in session cleanup:', error);
    return NextResponse.json({ 
      success: false, 
      error: 'Session cleanup failed',
      details: error instanceof Error ? error.message : 'Unknown error'
    }, { status: 500 });
  }
}