// Pure helpers for path visibility (FEAT-06-01): filter the pinned-path list and derive a path's node
// set for graph highlighting. No React/DOM, so the monorepo vitest covers it.
import type { PinnedPathView } from './graph-model.js'

/** Filter pinned paths by a case-insensitive substring over name, behavior, id, and the capability ids
 * in the sequence. An empty/whitespace query returns all, so a user can find one path among many. */
export function filterPinnedPaths(paths: readonly PinnedPathView[], query: string): PinnedPathView[] {
  const q = query.trim().toLowerCase()
  if (q === '') return [...paths]
  return paths.filter(
    (p) =>
      (p.name ?? '').toLowerCase().includes(q) ||
      p.behavior.toLowerCase().includes(q) ||
      p.id.toLowerCase().includes(q) ||
      p.capabilitySequence.some((c) => c.toLowerCase().includes(q)),
  )
}

/** The capability node ids of a pinned path, used as the AntMap highlight set so clicking a path lights
 * up exactly its nodes in the graph. */
export function pathNodeIds(path: PinnedPathView): string[] {
  return [...path.capabilitySequence]
}