/**
 * SFV checksum lists: one `name CRC32` per line, `;` comments. Scene
 * releases (music in particular) post one with every album; it names every
 * file that belongs to it.
 */
export interface SfvEntry {
  name: string
  crc: string
}

export function parseSfv(text: string): SfvEntry[] {
  const entries: SfvEntry[] = []
  for (const raw of text.split(/\r?\n/)) {
    const line = raw.trim()
    if (!line || line.startsWith(';')) continue
    const match = /^(.+?)\s+([0-9a-f]{8})$/i.exec(line)
    if (match) entries.push({ name: match[1].replace(/^"|"$/g, '').split(/[\\/]/).pop()!, crc: match[2].toLowerCase() })
  }
  return entries
}

/**
 * The album name an SFV gives a release: its stem without the leading
 * track number scene groups put on the playlist/SFV/cover files
 * (`00-artist-album-web-2026-grp.sfv` → `artist-album-web-2026-grp`).
 */
export function sfvReleaseName(sfvName: string): string {
  return sfvName.replace(/\.sfv$/i, '').replace(/^0{1,3}-/, '')
}