import { ActionType } from './type';

export const NGRX_STORE_META = '__ngrx__store__';

export interface StoreMetadata {
  initialState?: any;
  actions: ActionsMeta;
  effects: ActionsMeta;
}

export interface ActionMeta {
  action: ActionType;
  methodName: string;
  type: string;
}

export interface ActionsMeta {
  [type: string]: ActionMeta;
}

export function ensureStoreMetadata(target: any): StoreMetadata {
  // see https://github.com/angular/angular/blob/master/packages/core/src/util/decorators.ts#L60
  if (!target.hasOwnProperty(NGRX_STORE_META)) {
    const defaultMetadata: StoreMetadata = { actions: {}, effects: {} };
    Object.defineProperty(target, NGRX_STORE_META, { value: defaultMetadata });
  }
  return target[NGRX_STORE_META];
}