import type { ArticleMeta } from '@/types/content'

function normalize(value: string): string {
  return value.normalize('NFKC').toLowerCase().trim()
}

/** All whitespace-separated terms must match metadata; article body is not searched. */
export function searchArticles(articles: ArticleMeta[], query: string): ArticleMeta[] {
  const terms = normalize(query).split(/\s+/).filter(Boolean)
  return articles.filter(article => {
    const text = normalize([article.title, article.description, article.series ?? '', ...article.tags].join(' '))
    return terms.every(term => text.includes(term))
  })
}