Query Fan-Out

// Calcul du Fan-Out Score sans appel LLM
// Utilise les keywords DataForSEO existants

interface FanOutResult {
  score: number;        // 0-100
  coveredAxes: number;
  totalAxes: number;
  missingKeywords: { keyword: string; volume: number }[];
}

function computeFanOutScore(
  pageContent: string,
  marketKeywords: { keyword: string; volume: number }[]
): FanOutResult {
  const contentLower = pageContent.toLowerCase();
  const axes = marketKeywords
    .sort((a, b) => b.volume - a.volume)
    .slice(0, 15);

  let covered = 0;
  const missing: { keyword: string; volume: number }[] = [];

  for (const kw of axes) {
    const terms = kw.keyword.toLowerCase()
      .split(/\s+/).filter(w => w.length > 2);
    const matchRatio = terms.filter(t => contentLower.includes(t)).length / terms.length;
    
    if (matchRatio >= 0.6) {
      covered++;
    } else {
      missing.push(kw);
    }
  }

  return {
    score: Math.round((covered / axes.length) * 100),
    coveredAxes: covered,
    totalAxes: axes.length,
    missingKeywords: missing.slice(0, 5)
  };
}