// dnd-kit ids must be unique per DndContext, and legend group/layer id
// namespaces may collide — so sortable ids carry a kind prefix.

export type SortableKind = 'group' | 'layer'

export const toSortableId = (kind: SortableKind, id: string): string =>
  `${kind}:${id}`

export function parseSortableId(
  sortableId: string,
): { kind: SortableKind; id: string } | null {
  const sep = sortableId.indexOf(':')
  if (sep === -1) return null
  const kind = sortableId.slice(0, sep)
  if (kind !== 'group' && kind !== 'layer') return null
  return { kind, id: sortableId.slice(sep + 1) }
}