export class OllamaError extends Error {
  constructor(status, body) { super(`ollama ${status}: ${body}`); this.status = status; }
}

export async function embedText(text, { model = 'nomic-embed-text', timeoutMs = 60_000 } = {}) {
  const url = (process.env.OLLAMA_URL || 'http://192.168.1.185:11434') + '/api/embeddings';
  const res = await fetch(url, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ model, prompt: text }),
    signal: AbortSignal.timeout(timeoutMs)
  });
  if (!res.ok) throw new OllamaError(res.status, await res.text());
  const j = await res.json();
  return j.embedding;
}

export function padTo(vector, dim) {
  if (vector.length === dim) return vector;
  if (vector.length > dim) return vector.slice(0, dim);
  const out = vector.slice();
  while (out.length < dim) out.push(0);
  return out;
}