<?php

class RemoteController
{
    private $onOffCommand;
    private $nextChannelCommand;
    private $previousChannelCommand;
    private $volumeUpCommand;
    private $volumeDownCommand;

    public function __construct(TV $tv)
    {
        $this->onOffCommand = new OnOffCommand($tv);
        $this->nextChannelCommand = new NextChannelCommand($tv);
        $this->previousChannelCommand = new PreviousChannelCommand($tv);
        $this->volumeUpCommand = new VolumeUpCommand($tv);
        $this->volumeDownCommand = new VolumeDownCommand($tv);
    }

    public function onOffButton()
    {
        $this->onOffCommand->execute();
    }

    public function nextChannelButton()
    {
        $this->nextChannelCommand->execute();
    }

    public function previousChannelButton()
    {
        $this->previousChannelCommand->execute();
    }

    public function volumeUpButton()
    {
        $this->volumeUpCommand->execute();
    }

    public function volumeDownButton()
    {
        $this->volumeDownCommand->execute();
    }
}