package bridge;

/**
 * Abstraction — the remote control. It holds a reference to a Device
 * (the "bridge") and delegates all real work to it.
 *
 * The key: RemoteControl doesn't care whether it talks to a TV or Radio.
 * It holds a Device and calls Device methods. That's the bridge.
 */
public class RemoteControl {

    // The bridge — link from Abstraction to Implementation
    protected Device device;

    public RemoteControl(Device device) {
        this.device = device;
        System.out.println("Remote paired with: " + device.getName());
    }

    public void togglePower() {
        if (device.isEnabled()) {
            device.disable();
        } else {
            device.enable();
        }
    }

    public void volumeUp()   { device.setVolume(device.getVolume() + 10); }
    public void volumeDown() { device.setVolume(device.getVolume() - 10); }

    public void channelUp()   { device.setChannel(device.getChannel() + 1); }
    public void channelDown() { device.setChannel(device.getChannel() - 1); }
}