/**
 * 智能电视类
 * 实现了Device、BrightnessAdjustable、MediaPlayable和Timable接口
 */
public class SmartTV implements Device, BrightnessAdjustable, MediaPlayable, Timable {
    private String name;
    private boolean on;
    private int brightness;
    private String currentMedia;
    private String playbackStatus;
    private int timerMinutes;
    private boolean timerSet;
    
    public SmartTV(String name) {
        this.name = name;
        this.on = false;
        this.brightness = 70; // 默认亮度70%
        this.currentMedia = null;
        this.playbackStatus = "停止";
        this.timerMinutes = 0;
        this.timerSet = false;
    }
    
    @Override
    public String getName() {
        return name;
    }
    
    @Override
    public void turnOn() {
        if (!on) {
            on = true;
            System.out.println(name + " 智能电视已开启");
        }
    }
    
    @Override
    public void turnOff() {
        if (on) {
            on = false;
            playbackStatus = "停止";
            System.out.println(name + " 智能电视已关闭");
        }
    }
    
    @Override
    public boolean isOn() {
        return on;
    }
    
    @Override
    public void increaseBrightness(int level) {
        if (on) {
            brightness = Math.min(100, brightness + level);
            System.out.println(name + " 亮度已增加到: " + brightness + "%");
        }
    }
    
    @Override
    public void decreaseBrightness(int level) {
        if (on) {
            brightness = Math.max(0, brightness - level);
            System.out.println(name + " 亮度已降低到: " + brightness + "%");
        }
    }
    
    @Override
    public void setBrightness(int brightness) {
        if (on) {
            if (brightness >= 0 && brightness <= 100) {
                this.brightness = brightness;
                System.out.println(name + " 亮度已设置为: " + brightness + "%");
            }
        }
    }
    
    @Override
    public int getCurrentBrightness() {
        return brightness;
    }
    
    @Override
    public void play(String mediaName) {
        if (on) {
            this.currentMedia = mediaName;
            this.playbackStatus = "播放中: " + mediaName;
            System.out.println(name + " 正在播放: " + mediaName);
        }
    }
    
    @Override
    public void pause() {
        if (on && "播放中: " + currentMedia.equals(playbackStatus)) {
            this.playbackStatus = "暂停: " + currentMedia;
            System.out.println(name + " 已暂停播放");
        }
    }
    
    @Override
    public void stop() {
        if (on) {
            this.playbackStatus = "停止";
            this.currentMedia = null;
            System.out.println(name + " 已停止播放");
        }
    }
    
    @Override
    public String getPlaybackStatus() {
        return playbackStatus;
    }
    
    @Override
    public void setTimer(int minutes) {
        if (on && minutes > 0) {
            this.timerMinutes = minutes;
            this.timerSet = true;
            System.out.println(name + " 已设置定时器: " + minutes + " 分钟后关闭");
        }
    }
    
    @Override
    public void cancelTimer() {
        if (timerSet) {
            this.timerSet = false;
            this.timerMinutes = 0;
            System.out.println(name + " 定时器已取消");
        }
    }
    
    @Override
    public boolean isTimerSet() {
        return timerSet;
    }
    
    @Override
    public int getRemainingTime() {
        return timerMinutes;
    }
}