import { env } from '@/lib/env';

const OPENROUTER_URL = 'https://openrouter.ai/api/v1/chat/completions';

export function openrouterConfigurado(): boolean {
  return Boolean(env.OPENROUTER_API_KEY);
}

// Llamada de chat que espera una respuesta JSON. Parseo robusto (tolera fences ```json).
export async function chatJSON(system: string, user: string, model?: string): Promise<unknown> {
  const res = await fetch(OPENROUTER_URL, {
    method: 'POST',
    headers: {
      Authorization: `Bearer ${env.OPENROUTER_API_KEY}`,
      'Content-Type': 'application/json',
      'HTTP-Referer': 'https://reformix.es',
      'X-Title': 'Reformix App',
    },
    body: JSON.stringify({
      model: model || env.OPENROUTER_MODEL_ANALISIS || 'anthropic/claude-haiku-4.5',
      messages: [
        { role: 'system', content: system },
        { role: 'user', content: user },
      ],
      temperature: 0.1,
      max_tokens: 700,
    }),
  });
  if (!res.ok) {
    throw new Error(`OpenRouter ${res.status}: ${(await res.text()).slice(0, 300)}`);
  }
  const data = await res.json();
  const content: string = data?.choices?.[0]?.message?.content ?? '';
  try {
    return JSON.parse(content);
  } catch {
    const m = content.match(/\{[\s\S]*\}/);
    if (m) return JSON.parse(m[0]);
    throw new Error('La respuesta del modelo no es JSON');
  }
}