import { fliphash, stringify } from 'chain-able-boost'
import {
  IDENTIFIER_REFERENCE_REGISTRY,
  IDENTIFIER_STRING_REGISTRY,
} from './IDENTIFIER_REGISTRY'
import { uuid } from './uuid'

/**
 * @example for why `id` in part of a variable name sucks
 * @see https://bitbucket.org/skava-admin/skreact/commits/fbdc931637a385f99a802f9cce5ef3c7c8953632?at=dev
 */
/**
 * different than the other to identifiers -.-
 * value-equals-identity
 * one day, easy to wicked optimize this => trie
 */
function toIdentityHash(
  small: Object | string,
  ignoreReference: boolean | Object = false
): string {
  // `a === b`
  if (ignoreReference === false && IDENTIFIER_STRING_REGISTRY.has(small)) {
    return IDENTIFIER_STRING_REGISTRY.get(small)
  }

  const string = stringify(small)

  if (IDENTIFIER_REFERENCE_REGISTRY.has(string)) {
    return IDENTIFIER_REFERENCE_REGISTRY.get(string)
  }

  const unique = uuid() + string
  const hashstring = '__' + fliphash(unique)
  IDENTIFIER_REFERENCE_REGISTRY.set(string, hashstring)
  IDENTIFIER_STRING_REGISTRY.set(small, hashstring)
  return hashstring
}

export default toIdentityHash
export { toIdentityHash }