// Shared local-LLM client — Ollama on shadow-death (.128).
// Single source of truth for host/model across the whole app.
export const OLLAMA_HOST = process.env.OLLAMA_HOST || 'http://10.30.20.128:11434';
export const OLLAMA_MODEL = process.env.OLLAMA_MODEL || 'qwen3.8:latest';

export interface LocalModelOptions {
  formatJson?: boolean;
  numPredict?: number;
  temperature?: number;
}

export async function callLocalModel(prompt: string, opts: LocalModelOptions = {}): Promise<string> {
  const body: Record<string, any> = {
    model: OLLAMA_MODEL,
    messages: [{ role: 'user', content: prompt }],
    stream: false,
    keep_alive: '30m',
    options: {
      num_predict: opts.numPredict ?? 4096,
      temperature: opts.temperature ?? 0.2,
      think: false,
      num_ctx: 8192,
    },
  };
  if (opts.formatJson) body.format = 'json';

  const res = await fetch(`${OLLAMA_HOST}/api/chat`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(body),
    signal: AbortSignal.timeout(180000),
  });
  if (!res.ok) {
    throw new Error(`Ollama HTTP ${res.status} (${res.statusText})`);
  }
  const data = await res.json();
  let content = data?.message?.content || '';
  if (!content) content = data?.message?.thinking || '';
  return (content || '').trim();
}