import { Action } from '../../../@ngrx/store';

export const INCREMENT = 'INCREMENT';
export const DECREMENT = 'DECREMENT';
export const RESET = 'RESET';

export function counterReducer(state: number = 0, action: Action) {
  switch (action.type) {
    case INCREMENT:
      return state + 1;

    case DECREMENT:
      return state - 1;

    case RESET:
      return 0;

    default:
    {
      if (parseInt(action.type, 10) >= 0) return parseInt(action.type, 10);
      else return 0;
    }
  }
}