import { NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from '@/app/api/auth/[...nextauth]/route';
import { 
  saveUserEmailCredentials, 
  getUserEmailCredentials, 
  testEmailConnection 
} from '@/lib/services/email-service';

export async function POST(request: Request) {
  try {
    // Authenticate user
    const session = await getServerSession(authOptions);
    if (!session?.user?.id) {
      return NextResponse.json(
        { error: 'Unauthorized' },
        { status: 401 }
      );
    }

    // Get credentials from request
    const { email, password, host, port } = await request.json();

    // Validate required fields
    if (!email || !password || !host || !port) {
      return NextResponse.json(
        { error: 'Missing required fields' },
        { status: 400 }
      );
    }

    // Test connection before saving
    const connectionSuccess = await testEmailConnection({
      email,
      password,
      host,
      port: parseInt(port)
    });

    if (!connectionSuccess) {
      return NextResponse.json(
        { error: 'Failed to connect to email server. Please check your credentials.' },
        { status: 401 }
      );
    }

    // Save credentials in the database
    await saveUserEmailCredentials(session.user.id, {
      email,
      password,
      host,
      port: parseInt(port)
    });

    return NextResponse.json({ success: true });
  } catch (error) {
    console.error('Error in login handler:', error);
    return NextResponse.json(
      { 
        error: 'An unexpected error occurred',
        details: error instanceof Error ? error.message : 'Unknown error'
      },
      { status: 500 }
    );
  }
}

export async function GET() {
  try {
    // Authenticate user
    const session = await getServerSession(authOptions);
    if (!session?.user?.id) {
      return NextResponse.json(
        { error: 'Unauthorized' },
        { status: 401 }
      );
    }

    // Get user credentials from database
    const credentials = await getUserEmailCredentials(session.user.id);

    if (!credentials) {
      return NextResponse.json(
        { error: 'No stored credentials found' },
        { status: 404 }
      );
    }

    // Return credentials without the password
    return NextResponse.json({
      email: credentials.email,
      host: credentials.host,
      port: credentials.port
    });
  } catch (error) {
    console.error('Error fetching credentials:', error);
    return NextResponse.json(
      { error: 'Failed to retrieve credentials' },
      { status: 500 }
    );
  }
}