import { NextRequest, NextResponse } from 'next/server';
import { db } from '@/app/db/drizzle';
import { domains, emails } from '@/app/db/schema';
import { authenticate } from '@/app/lib/utils';
import { eq } from 'drizzle-orm';

export async function GET(req: NextRequest) {
  if (!authenticate(req)) return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });

  const { searchParams } = new URL(req.url);
  const bucket = searchParams.get('bucket');
  if (!bucket) return NextResponse.json({ error: 'Missing bucket' }, { status: 400 });

  const [domain] = await db.select().from(domains).where(eq(domains.bucket, bucket));
  if (!domain) return NextResponse.json({ error: 'Domain not found' }, { status: 404 });

  // Hole alle E-Mail-Adressen aus den "to" Feldern für diese Domain
  const mailboxData = await db.select({ to: emails.to }).from(emails).where(eq(emails.domainId, domain.id));
  
  // Extrahiere die Domain aus dem Bucket-Namen (z.B. "example-com-emails" -> "example.com")
  const domainName = bucket.replace('-emails', '').replace(/-/g, '.');
  
  const uniqueMailboxes = new Set<string>();
  
  // Filtere nur E-Mail-Adressen, die zur aktuellen Domain gehören
  mailboxData.forEach(em => {
    em.to?.forEach(recipient => {
      const recipientLower = recipient.toLowerCase();
      // Prüfe, ob die E-Mail-Adresse zur Domain gehört
      if (recipientLower.endsWith(`@${domainName}`)) {
        uniqueMailboxes.add(recipientLower);
      }
    });
  });

  return NextResponse.json(Array.from(uniqueMailboxes).sort());
}