#import "ViewController.h"

#import  // 导入AVKit框架
#import  // 导入AVFoundation框架

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self printAVAudioSessionConfiguration];
    
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
    [[AVAudioSession sharedInstance] setActive: YES error:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(audioRouteChangeListenerCallback:)
                                                 name:AVAudioSessionRouteChangeNotification
                                               object:nil];
    NSLog(@"Current Audio Route: %@", [AVAudioSession sharedInstance].currentRoute);
    [self printAVAudioSessionConfiguration];
    
    self.view.backgroundColor = [UIColor whiteColor];

    // 1. 创建AVPlayerViewController实例
    AVPlayerViewController *playerVC = [[AVPlayerViewController alloc] init];

    // 2. 创建AVPlayer
    // 示例HLS URL。请替换为您的实际HLS流地址。
    NSURL *hlsURL = [NSURL URLWithString:@"https://bitdash-a.akamaihd.net/content/sintel/hls/playlist.m3u8"];
    AVPlayer *player = [AVPlayer playerWithURL:hlsURL];

    // 3. 将AVPlayer赋值给AVPlayerViewController
    playerVC.player = player;

    // 4. 将AVPlayerViewController作为子视图控制器添加
    // 在tvOS上，AVPlayerViewController通常作为唯一的或主要内容视图控制器
    playerVC.view.frame = self.view.bounds; // 通常全屏显示
    [self addChildViewController:playerVC];
    [self.view addSubview:playerVC.view];
    [playerVC didMoveToParentViewController:self];

    // 5. 自动播放 (可选)
    [player play];

    // 您可以通过playerVC访问其player属性来控制播放，例如：
    // [playerVC.player pause];
    // [playerVC.player seekToTime:CMTimeMakeWithSeconds(60, NSEC_PER_SEC)];
}

- (void)audioRouteChangeListenerCallback:(NSNotification *)notification {
    NSDictionary *interruptionDict = notification.userInfo;
    NSInteger routeChangeReason = [[interruptionDict valueForKey:AVAudioSessionRouteChangeReasonKey] integerValue];

    switch (routeChangeReason) {
        case AVAudioSessionRouteChangeReasonNewDeviceAvailable:
            NSLog(@"AVAudioSessionRouteChangeReasonNewDeviceAvailable");
            // 新设备可用，检查是否包含 HomePod
            break;
        case AVAudioSessionRouteChangeReasonOldDeviceUnavailable:
            NSLog(@"AVAudioSessionRouteChangeReasonOldDeviceUnavailable");
            break;
        case AVAudioSessionRouteChangeReasonCategoryChange:
            NSLog(@"AVAudioSessionRouteChangeReasonCategoryChange");
            break;
        // ... 其他原因
    }
    NSLog(@"routeChangeReason: %ld, Change Audio Route: %@", routeChangeReason, [AVAudioSession sharedInstance].currentRoute);
    [self printAVAudioSessionConfiguration];
}


// 这是一个示例方法，您可以在 viewDidLoad 或任何需要检查配置的地方调用它
- (void)printAVAudioSessionConfiguration {
    AVAudioSession *audioSession = [AVAudioSession sharedInstance];

    NSLog(@"--- AVAudioSession 配置信息 ---");

    // 1. 类别 (Category)
    // 用于定义音频会话的基本行为（例如，播放、录音、混合等）
    NSLog(@"Category: %@", audioSession.category);
    
    // 2. 模式 (Mode)
    // 用于优化特定用例的音频行为（例如，视频聊天、语音聊天、测量等）
    NSLog(@"Mode: %@", audioSession.mode);
    
    // 3. 选项 (Category Options)
    // 类别相关的额外选项，例如是否允许后台播放、是否混音等
    AVAudioSessionCategoryOptions options = audioSession.categoryOptions;
    NSMutableString *optionsString = [NSMutableString string];
    if (options & AVAudioSessionCategoryOptionMixWithOthers) {
        [optionsString appendString:@"MixWithOthers | "];
    }
    if (options & AVAudioSessionCategoryOptionDuckOthers) {
        [optionsString appendString:@"DuckOthers | "];
    }
    if (options & AVAudioSessionCategoryOptionAllowBluetooth) {
        [optionsString appendString:@"AllowBluetooth | "];
    }
    if (options & AVAudioSessionCategoryOptionInterruptSpokenAudioAndMixWithOthers) {
        [optionsString appendString:@"InterruptSpokenAudioAndMixWithOthers | "];
    }
    if (options & AVAudioSessionCategoryOptionAllowBluetoothA2DP) {
        [optionsString appendString:@"AllowBluetoothA2DP | "];
    }
    if (options & AVAudioSessionCategoryOptionAllowAirPlay ) {
        [optionsString appendString:@"AllowAirPlay | "];
    }
    
    if (optionsString.length > 0) {
        [optionsString deleteCharactersInRange:NSMakeRange(optionsString.length - 3, 3)]; // 移除末尾的 " | "
        NSLog(@"Category Options: %@", optionsString);
    } else {
        NSLog(@"Category Options: None");
    }

    // 4. 当前是否激活 (Active)
    // 会话是否已被系统激活并用于音频处理
    //NSLog(@"Active: %@", audioSession active ? @"YES" : @"NO");

    // 5. 采样率 (Sample Rate)
    // 音频数据的采样率，单位赫兹 (Hz)
    NSLog(@"Sample Rate: %f Hz", audioSession.sampleRate);
    
    // 6. IO 缓冲区时长 (IO Buffer Duration)
    // 音频硬件的输入/输出缓冲区大小，影响延迟
    NSLog(@"IO Buffer Duration: %f seconds", audioSession.IOBufferDuration);

    // 7. 通道数 (Channel Count)
    // 设备支持的输入/输出通道数
    NSLog(@"Input Channel Count: %ld", (long)audioSession.inputNumberOfChannels);
    NSLog(@"Output Channel Count: %ld", (long)audioSession.outputNumberOfChannels);

    // 8. 硬件输入/输出增益 (Hardware IO Gain) - iOS 10.0+
    // 硬件提供的输入/输出增益，通常用于调节麦克风或扬声器音量
    if (@available(iOS 10.0, tvOS 10.0, *)) {
        if (audioSession.isInputGainSettable) {
            NSLog(@"Input Gain Settable: YES");
            NSLog(@"Input Gain: %f dB", audioSession.inputGain);
        } else {
            NSLog(@"Input Gain Settable: NO");
        }
    }

    // 9. 当前路由 (Current Route)
    // 最重要的部分之一，显示当前音频的输入和输出设备
    AVAudioSessionRouteDescription *currentRoute = audioSession.currentRoute;
    NSLog(@"Current Route:");
    for (AVAudioSessionPortDescription *inputPort in currentRoute.inputs) {
        NSLog(@"  Input Port: Type=%@ Name=%@ UID=%@", inputPort.portType, inputPort.portName, inputPort.UID);
    }
    for (AVAudioSessionPortDescription *outputPort in currentRoute.outputs) {
        NSLog(@"  Output Port: Type=%@ Name=%@ UID=%@", outputPort.portType, outputPort.portName, outputPort.UID);
        // 如果是 AirPlay 设备，portType 会是 AVAudioSessionPortAirPlay
        // portName 会是设备名称（如 "HomePod mini"）
    }
    
    // 10. 可用输入 (Available Inputs)
    // 设备当前可用的所有输入端口
    NSLog(@"Available Inputs:");
    for (AVAudioSessionPortDescription *inputPort in audioSession.availableInputs) {
        NSLog(@"  Input Port: Type=%@ Name=%@ UID=%@", inputPort.portType, inputPort.portName, inputPort.UID);
    }

    NSLog(@"--- 配置信息结束 ---");
}

- (void)dealloc {
    // 在视图控制器销毁时，确保停止播放并释放player资源
    for (UIViewController *vc in self.childViewControllers) {
        if ([vc isKindOfClass:[AVPlayerViewController class]]) {
            AVPlayerViewController *playerVC = (AVPlayerViewController *)vc;
            [playerVC.player pause]; // 停止播放
            playerVC.player = nil;   // 释放player
            break;
        }
    }
}


@end