import { NextRequest, NextResponse } from 'next/server';

import { listChannels, createChannel, getChannelByName } from '@/lib/db';

export const runtime = 'nodejs';

export const dynamic = 'force-dynamic';

export async function GET() {

  return NextResponse.json({ channels: listChannels() });

}

export async function POST(req: NextRequest) {

  const { name, defaultModel } = await req.json();

  if (!name || !defaultModel) return NextResponse.json({ error: 'name and defaultModel required' }, { status: 400 });

  const clean = String(name).trim().replace(/^#/, '').replace(/\s+/g, '-').toLowerCase();

  if (getChannelByName(clean)) return NextResponse.json({ error: 'channel exists' }, { status: 409 });

  if (!['glm', 'claude', 'codex', 'ollama'].includes(defaultModel)) return NextResponse.json({ error: 'bad model' }, { status: 400 });

  return NextResponse.json({ channel: createChannel(clean, defaultModel) });

}