/**
 * Filters a 2D series of `{name, ...}` records, keeping only items whose
 * `name` is in the locked set. Multi-series shape is preserved (one inner
 * array per series). Used by the LockSelection action's data transform.
 */
export function filterByLockedItems(
  input: unknown,
  lockedItems: readonly (string | number)[],
): unknown {
  if (lockedItems.length === 0) return input
  if (!Array.isArray(input)) return input
  const set = new Set<string | number>(lockedItems)
  return input.map((series: unknown): unknown => {
    if (!Array.isArray(series)) return series
    return series.filter((item: unknown) => {
      if (item == null) return false
      if (typeof item === 'object' && 'name' in item) {
        const name = (item as { name: unknown }).name
        if (typeof name === 'string' || typeof name === 'number') {
          return set.has(name)
        }
        return false
      }
      return false
    })
  })
}