import { NextResponse, NextRequest } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from '@/app/api/auth/[...nextauth]/route';

export async function GET(req: NextRequest) {
  try {
    const session = await getServerSession(authOptions);

    if (!session?.accessToken) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
    }

    const nextcloudUrl = process.env.NEXTCLOUD_URL;
    if (!nextcloudUrl) {
      console.error('Missing Nextcloud URL');
      return NextResponse.json(
        { error: 'Nextcloud configuration is missing' },
        { status: 500 }
      );
    }

    // First, try to get the user's Nextcloud ID using the Keycloak token
    const userInfoResponse = await fetch(`${nextcloudUrl}/ocs/v2.php/cloud/user`, {
      headers: {
        'Authorization': `Bearer ${session.accessToken}`,
        'Accept': 'application/json',
        'OCS-APIRequest': 'true',
      },
    });

    if (!userInfoResponse.ok) {
      console.error('Failed to get user info:', {
        status: userInfoResponse.status,
        statusText: userInfoResponse.statusText,
        url: userInfoResponse.url
      });
      
      if (userInfoResponse.status === 401) {
        return NextResponse.json({ error: 'Nextcloud authentication failed' }, { status: 401 });
      }
      
      return NextResponse.json(
        { error: "L'application Mail n'est pas disponible sur Nextcloud. Veuillez contacter votre administrateur." },
        { status: 404 }
      );
    }

    const userInfo = await userInfoResponse.json();
    const userId = userInfo?.ocs?.data?.id;

    if (!userId) {
      console.error('Failed to get user ID from Nextcloud');
      return NextResponse.json(
        { error: "L'application Mail n'est pas disponible sur Nextcloud. Veuillez contacter votre administrateur." },
        { status: 404 }
      );
    }

    // Now try to access the Mail app
    const response = await fetch(`${nextcloudUrl}/index.php/apps/mail/api/accounts`, {
      headers: {
        'Authorization': `Bearer ${session.accessToken}`,
        'Accept': 'application/json',
        'Content-Type': 'application/json',
      },
    });

    if (!response.ok) {
      console.error('Mail app check failed:', {
        status: response.status,
        statusText: response.statusText,
        url: response.url
      });
      
      if (response.status === 401) {
        return NextResponse.json({ error: 'Nextcloud authentication failed' }, { status: 401 });
      }
      
      return NextResponse.json(
        { error: "L'application Mail n'est pas disponible sur Nextcloud. Veuillez contacter votre administrateur." },
        { status: 404 }
      );
    }

    const accounts = await response.json();
    
    // For now, return a success response with an empty array
    // We'll implement the actual message fetching once we confirm the correct endpoint
    return NextResponse.json([]);
  } catch (error) {
    console.error('Error checking Mail app:', error);
    return NextResponse.json(
      { error: "L'application Mail n'est pas disponible sur Nextcloud. Veuillez contacter votre administrateur." },
      { status: 404 }
    );
  }
}