import { NextRequest, NextResponse } from 'next/server';
import { requireRole, createUser } from '@/lib/auth';
import { db } from '@/lib/db';

export async function GET() {
  try {
    await requireRole('admin');
    const { rows } = await db.query('SELECT id, username, role, created_at FROM users ORDER BY created_at DESC');
    return NextResponse.json({ data: rows });
  } catch (err: any) {
    return NextResponse.json({ error: err.message || 'Failed to fetch users' }, { status: err.message === 'Unauthorized' ? 401 : 500 });
  }
}

export async function POST(request: NextRequest) {
  try {
    await requireRole('admin');
    const body = await request.json();
    const { username, password, role = 'user' } = body;

    if (!username || !password) {
      return NextResponse.json({ error: 'Username and password are required' }, { status: 400 });
    }

    if (role !== 'admin' && role !== 'user') {
      return NextResponse.json({ error: 'Role must be admin or user' }, { status: 400 });
    }

    const user = await createUser(username, password, role as 'admin' | 'user');
    return NextResponse.json({ ok: true, user: { id: user.id, username: user.username, role: user.role } });
  } catch (err: any) {
    return NextResponse.json({ error: err.message || 'Failed to create user' }, { status: err.message === 'Unauthorized' ? 401 : 500 });
  }
}