import State from "./State";
import StateMachine from "./StateMachine";

/***
 * 子有限状态机基类
 * 用处：例如有个idle的state，但是有多个方向，为了让主状态机更整洁，可以把同类型的但具体不同的state都封装在子状态机中
 */
export default abstract class SubStateMachine {
  private _currentState: State = null;
  stateMachines: Map<string, State> = new Map();

  constructor(public fsm: StateMachine) {}

  get currentState() {
    return this._currentState;
  }

  set currentState(newState) {
    if (!newState) {
      return;
    }
    this._currentState = newState;
    this._currentState.run();
  }

  /***
   * 具体类实现
   */
  abstract run(): void;
}