import { NextResponse } from 'next/server';
import db from '@/lib/db';

export const dynamic = 'force-dynamic';

type Params = { params: Promise<{ id: string }> };

export async function PUT(request: Request, { params }: Params) {
  const { id } = await params;
  const { name } = await request.json();
  const existing = db.prepare('SELECT * FROM groups WHERE id = ?').get(Number(id));
  if (!existing) return NextResponse.json({ error: 'Not found' }, { status: 404 });
  if (!name?.trim()) return NextResponse.json({ error: 'Name is required' }, { status: 400 });
  db.prepare('UPDATE groups SET name = ? WHERE id = ?').run(name.trim(), Number(id));
  const updated = db.prepare('SELECT * FROM groups WHERE id = ?').get(Number(id));
  return NextResponse.json(updated);
}

export async function DELETE(_req: Request, { params }: Params) {
  const { id } = await params;
  const existing = db.prepare('SELECT * FROM groups WHERE id = ?').get(Number(id));
  if (!existing) return NextResponse.json({ error: 'Not found' }, { status: 404 });
  db.transaction(() => {
    db.prepare('UPDATE counters SET group_id = NULL WHERE group_id = ?').run(Number(id));
    db.prepare('DELETE FROM groups WHERE id = ?').run(Number(id));
  })();
  return new NextResponse(null, { status: 204 });
}