const Light = {
  isOn: false,
  turnOn() {
    this.isOn = true
    return this
  },
  turnOff() {
    this.isOn = false
    return this
  }
}

const CommandFactory = ({ receiver, execute, unexecute }) => ({
  receiver,
  execute,
  unexecute
})

const LightInvokerFactory = ({ on, off }) => ({
  on: CommandFactory(on),
  off: CommandFactory(off)
})

const myLightInvoker = LightInvokerFactory({
  on: {
    receiver: Light,
    execute() {
      this.receiver.turnOn()
      return this
    },
    unexecute() {
      this.receiver.turnOff()
      return this
    }
  },
  off: {
    receiver: Light,
    execute() {
      this.receiver.turnOff()
      return this
    },
    unexecute() {
      this.receiver.turnOn()
      return this
    }
  }
})