"""
OpenAI-compatible /v1/completions endpoint (legacy)
Accepts POST with JSON body matching OpenAI completions API format.
"""
import json

async def main():
    # Read request body
    body = {}
    try:
        raw_body = await request.read()
        if raw_body:
            body = json.loads(raw_body)
    except Exception as e:
        result = {
            'error': {
                'message': f'Invalid JSON body: {str(e)}',
                'type': 'invalid_request_error',
                'code': 400,
            }
        }
        return json.dumps(result, ensure_ascii=False)

    body['_request'] = request

    result = await harnessed_llm_completions(body)

    from aiohttp.web_response import StreamResponse
    if isinstance(result, StreamResponse):
        return result

    if 'error' in result:
        status_code = result.get('error', {}).get('code', 500)
        resp = web.Response(
            status=status_code,
            body=json.dumps(result, ensure_ascii=False),
            content_type='application/json'
        )
        return resp

    return json.dumps(result, ensure_ascii=False)