import { Signal } from 'signal-polyfill';

/**
 * equality check here is always false so that we can dirty the storage
 * via setting to _anything_
 *
 *
 * This is for a pattern where we don't *directly* use signals to back the values used in collections
 * so that instanceof checks and getters and other native features "just work" without having
 * to do nested proxying.
 *
 * (though, see deep.ts for nested / deep behavior)
 */
const createStorage = (initial = null) => new Signal.State(initial, {
  equals: () => false
});

/**
 * Just an alias for brevity
 */

const BOUND_FUNS = new WeakMap();
function fnCacheFor(context) {
  let fnCache = BOUND_FUNS.get(context);
  if (!fnCache) {
    fnCache = new Map();
    BOUND_FUNS.set(context, fnCache);
  }
  return fnCache; // as Map<keyof T, T[keyof T]>;
}

export { createStorage, fnCacheFor };
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