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

export async function GET() {
  try {
    // Get server session to verify authentication
    const session = await getServerSession(authOptions);
    
    // Check if user is authenticated
    if (!session || !session.user) {
      console.error("Unauthorized access to mail credentials");
      return NextResponse.json({ 
        error: "Unauthorized" 
      }, { status: 401 });
    }

    const userId = session.user.id;
    if (!userId) {
      console.error("User ID not found in session");
      return NextResponse.json({ 
        error: "User ID not found" 
      }, { status: 401 });
    }

    // Fetch mail credentials for this user using our service
    const mailCredentials = await getUserEmailCredentials(userId);

    // If no credentials found
    if (!mailCredentials) {
      console.warn(`No mail credentials found for user ID: ${userId}`);
      return NextResponse.json({ 
        error: "Mail credentials not found" 
      }, { status: 404 });
    }

    // Return the credentials (excluding password)
    console.log(`Successfully retrieved mail credentials for user ID: ${userId}`);
    return NextResponse.json({
      credentials: {
        email: mailCredentials.email,
        host: mailCredentials.host,
        port: mailCredentials.port
      }
    });

  } catch (error) {
    console.error("Error retrieving mail credentials:", error);
    return NextResponse.json({ 
      error: "Internal Server Error" 
    }, { status: 500 });
  }
}