import { SYSTEM_PROMPT } from '../prompts/extractRecipe.js';

const GROQ_API_KEY = process.env.GROQ_API_KEY;
const GROQ_MODEL = process.env.GROQ_MODEL || 'llama-3.1-8b-instant';
const GROQ_URL = 'https://api.groq.com/openai/v1/chat/completions';

export async function isAiAvailable() {
  if (!GROQ_API_KEY) return false;
  try {
    const res = await fetch(GROQ_URL, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${GROQ_API_KEY}`,
      },
      body: JSON.stringify({
        model: GROQ_MODEL,
        messages: [{ role: 'user', content: 'ping' }],
        max_tokens: 1,
      }),
      signal: AbortSignal.timeout(10000),
    });
    return res.ok;
  } catch {
    return false;
  }
}

export async function extractRecipe(description) {
  const response = await fetch(GROQ_URL, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${GROQ_API_KEY}`,
    },
    body: JSON.stringify({
      model: GROQ_MODEL,
      messages: [
        { role: 'system', content: SYSTEM_PROMPT },
        { role: 'user', content: `Extrahiere ein Rezept aus dieser TikTok-Videobeschreibung:\n\n${description}` },
      ],
      temperature: 0.1,
      max_tokens: 2048,
    }),
    signal: AbortSignal.timeout(30000),
  });

  if (!response.ok) {
    const err = await response.text();
    throw new Error(`Groq Fehler: ${response.status} - ${err}`);
  }

  const data = await response.json();
  let text = data.choices[0].message.content.trim();

  if (text.startsWith('```')) {
    text = text.replace(/^```(?:json)?\n?/, '').replace(/\n?```$/, '');
  }

  const jsonStart = text.indexOf('{');
  const jsonEnd = text.lastIndexOf('}');
  if (jsonStart === -1 || jsonEnd === -1 || jsonEnd <= jsonStart) {
    throw new Error('Kein valides JSON in der Modell-Antwort');
  }
  text = text.slice(jsonStart, jsonEnd + 1);

  return JSON.parse(text);
}