import HSM from '@fabiospampinato/hsm';

// The `states` object is similar to FSM's.
// The only difference being that an optional `states` key can be used to nest states.

const states = {
  alive: {
    states: {
      standing: {
        transitions: {
          walk: 'walking'
        }
      },
      walking: {
        transitions: {
          stop: 'standing',
          speedUp: 'running'
        }
      },
      running: {
        transitions: {
          slowDown: 'walking'
        }
      }
    }
  },
  dead {}
};

// The `model` object doesn't differ from the one FSM uses.

const Model = new class {
  walk () {
    console.log ( 'Starting to walk...' );
  }
  walkingEnter () {
    console.log ( 'Now I\'m walking' );
  }
  walkingExit () {
    console.log ( 'Now I\'n not walking anymore' );
  }
};

const machine = new HSM ( Model, states, 'standing' );

machine.transition ( 'walk' );

machine.is ( 'walking' ); // true
machine.is ( 'alive' ); // true
machine.is ( 'alive', true ); // false