/**
 * Publisher-toggleable features (see types.ts#CanvasFeature). When a canvas is
 * published to the web, the person publishing gets a checklist of the canvas's
 * declared `features` and can switch any off for visitors; the disabled ids are
 * injected into the published page as `window.__CASPIAN_DISABLED_FEATURES__`.
 *
 * Inside the Caspian app the global is absent, so every feature is enabled.
 * A canvas should read `featureEnabled(id)` while building its UI and, when a
 * feature is off, not create that control at all (and hold the feature at its
 * default state).
 *
 * Copy this file into your canvas's own sdk/ folder alongside bridge.ts and
 * types.ts. Optional: only canvases that declare `features` in canvas.json need it.
 */
import { DISABLED_FEATURES_GLOBAL } from './types'

function disabledSet(): Set<string> {
  const raw = (globalThis as Record<string, unknown>)[DISABLED_FEATURES_GLOBAL]
  return new Set(Array.isArray(raw) ? raw.filter((x): x is string => typeof x === 'string') : [])
}

/** True unless this feature id was switched off for the published copy. */
export function featureEnabled(id: string): boolean {
  return !disabledSet().has(id)
}