import { NextResponse } from 'next/server';

import { getSupabaseServerAdminClient } from '@kit/supabase/server-admin-client';

export async function POST(request: Request) {
  try {
    const body = await request.json();
    const {
      eventId,
      firstName,
      lastName,
      email,
      phone,
      dateOfBirth,
      parentName,
      parentPhone,
    } = body;

    if (!eventId || !firstName || !lastName || !email) {
      return NextResponse.json(
        { error: 'Event-ID, Vorname, Nachname und E-Mail sind erforderlich' },
        { status: 400 },
      );
    }

    if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
      return NextResponse.json(
        { error: 'Ungültige E-Mail-Adresse' },
        { status: 400 },
      );
    }

    const supabase = getSupabaseServerAdminClient();

    const { error } = await supabase.from('event_registrations').insert({
      event_id: eventId,
      first_name: firstName,
      last_name: lastName,
      email,
      phone: phone || null,
      date_of_birth: dateOfBirth || null,
      parent_name: parentName || null,
      parent_phone: parentPhone || null,
      status: 'registered',
      created_at: new Date().toISOString(),
    });

    if (error) {
      console.error('[event-register] Insert error:', error.message);
      return NextResponse.json(
        { error: 'Anmeldung fehlgeschlagen' },
        { status: 500 },
      );
    }

    return NextResponse.json({
      success: true,
      message: 'Anmeldung erfolgreich',
    });
  } catch (err) {
    console.error('[event-register] Error:', err);
    return NextResponse.json({ error: 'Serverfehler' }, { status: 500 });
  }
}