export function parseEditPasses(text: string): string[] | null {
  const src = String(text || '').replace(/\r\n/g, '\n')
  const marker = /^[ \t]*---pass\s+(\d+)---[ \t]*$/gim
  const markers = [...src.matchAll(marker)]
  if (!markers.length) return null
  const parts: string[] = []
  const preamble = src.slice(0, markers[0].index || 0).trim()
  for (let i = 0; i < markers.length; i++) {
    const from = (markers[i].index || 0) + markers[i][0].length
    const to = i + 1 < markers.length ? (markers[i + 1].index || src.length) : src.length
    const body = src.slice(from, to).trim()
    if (body) parts.push(body)
  }
  if (!parts.length) return null
  if (preamble && preamble.length > 40) {
    parts[0] = `${preamble}\n\n${parts[0]}`
  }
  return parts
}

export function looksLikeShotScript(text: string) {
  return /^[ \t]*shot\s+[2-9]\d*\b/im.test(String(text || ''))
}