interface TextPart {
  text: string
  hit: boolean
}

export function searchTerms(query: string): string[] {
  return query.trim().toLowerCase().split(/\s+/).filter(Boolean)
}

export function highlight(text: string, query: string): TextPart[] {
  const terms = searchTerms(query)
  if (!terms.length) return [{ text, hit: false }]

  const escaped = terms.map(term => term.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'))
  return text
    .split(new RegExp(`(${escaped.join('|')})`, 'gi'))
    .map((part, index) => ({ text: part, hit: index % 2 === 1 }))
    .filter(part => part.text)
}