/**
 * 토글 선언 줄을 파싱한다.
 * @param {string} line - 토글 선언 줄
 * @returns {{ title: string, defaultOpen: boolean }} 토글 옵션
 */
export const parseToggleOpenerLine = (line) => {
  const raw = String(line ?? '').trim().replace(/^:::toggle\s*/, '').trim()
  const tokens = raw.split(/\s+/).filter(Boolean)
  const state = tokens[0]?.toLowerCase()
  const hasStateToken = ['open', 'opened', 'default-open', 'closed', 'close', 'default-closed'].includes(state)
  const defaultOpen = ['open', 'opened', 'default-open'].includes(state)
  const title = (hasStateToken ? tokens.slice(1).join(' ') : raw).trim()

  return {
    title,
    defaultOpen
  }
}

/**
 * 토글 선언 줄을 만든다.
 * @param {{ title?: string, defaultOpen?: boolean }} options - 옵션
 * @returns {string} 토글 선언 줄
 */
export const buildToggleOpenerLine = (options = {}) => {
  const title = String(options.title ?? '').trim() || '더 보기'
  const state = options.defaultOpen ? 'open' : 'closed'

  return `:::toggle ${state} ${title}`
}

/**
 * 토글 블록 마크다운 줄 배열을 만든다.
 * @param {{ title?: string, body?: string, defaultOpen?: boolean }} options - 옵션
 * @returns {string[]} 마크다운 줄
 */
export const buildToggleBlockLines = (options = {}) => {
  const body = String(options.body ?? '').replace(/\r/g, '')
  const bodyLines = body.length ? body.split('\n') : ['']

  return [
    buildToggleOpenerLine(options),
    ...bodyLines,
    ':::'
  ]
}