'use strict';

// 信息型页面 LLM 提炼成 FAQ（旧 bridge faq/llmRefiner.js 的移植）。
function createFaqRefiner(llm) {
  const SYSTEM = `You turn website page content into a clean FAQ knowledge base entry.
Rules: output 3-8 "### Q: ..." / answer pairs based ONLY on the page content; never invent facts, numbers, or policies; answers 1-4 sentences; English; output only the FAQ body, no code fences.`;

  async function refineToFaq(rawMarkdown, category) {
    const text = String(rawMarkdown || '').slice(0, 6000);
    if (!text.trim()) return null;
    const res = await llm.chat({
      messages: [
        { role: 'system', content: SYSTEM },
        { role: 'user', content: `Page category: ${category || 'general'}\n\nRaw page content:\n${text}` },
      ],
      temperature: 0.2,
      maxTokens: 800,
    });
    const faq = String(res.content || '').trim();
    return faq.includes('### Q:') ? faq : null;
  }

  return { refineToFaq };
}

module.exports = { createFaqRefiner };