import type { Callback, CallbackFn, CallbackId, CallbackStore } from './types';

/**
 * @ignore
 */
export class Callbacks {
  private readonly store: CallbackStore;

  constructor(store: CallbackStore) {
    this.store = store;
  }

  public getFrom(key: string): Callback[] {
    return this.store[key] ?? [];
  }

  public addTo(key: string, callbackFn: CallbackFn): CallbackId {
    const callback: Callback = { id: Date.now().toString(), fn: callbackFn };
    this.store[key] = [...this.getFrom(key), callback];
    return callback.id;
  }

  public removeByCallbackFunctionFrom(
    key: string,
    callbackFn: CallbackFn,
  ): void {
    this.store[key] = this.getFrom(key).filter(
      (callback: Callback) => callback.fn !== callbackFn,
    );
  }

  public removeByCallbackIdFrom(key: string, callbackId?: CallbackId): void {
    if (!callbackId) {
      return;
    }

    this.store[key] = this.getFrom(key).filter(
      (callback: Callback) => callback.id !== callbackId,
    );
  }

  public executeFor(key: string, payload: any): void {
    this.getFrom(key).forEach((callback: Callback) => {
      callback.fn(payload);
    });
  }
}