import { openai } from '@ai-sdk/openai';
import {
  consumeStream,
  convertToModelMessages,
  streamText,
  UIMessage,
} from 'ai';

export const maxDuration = 30;

export async function POST(req: Request) {
  const { messages }: { messages: UIMessage[] } = await req.json();

  const prompt = convertToModelMessages(messages);

  const result = streamText({
    model: openai('gpt-4o'),
    prompt,
    abortSignal: req.signal,
  });

  return result.toUIMessageStreamResponse({
    onFinish: async ({ isAborted }) => {
      if (isAborted) {
        console.log('Aborted');
      }
    },
    consumeSseStream: consumeStream, // needed for correct abort handling
  });
}