//
//  MOLVideoViewController.m
//  STLBGVideo
//
//  Created by StoneLeon on 16/1/13.
//  Copyright © 2016年 StoneLeon. All rights reserved.
//

#import "MOLVideoViewController.h"
#import "MOLVideoFunctions.h"


#define CurrentSystemVersion ([[[UIDevice currentDevice] systemVersion] floatValue])

@interface MOLVideoViewController ()

@property (nonatomic, strong) AVPlayer *player;
@property (nonatomic, strong) AVPlayerLayer *playerLayer;

@property (nonatomic,assign) BOOL isLoop;

@end

@implementation MOLVideoViewController

#pragma mark - Player
- (void)getPlayerNotifications {
    // 添加播放结束通知，循环播放
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(playerDidFinishPlaying:)
                                                 name:AVPlayerItemDidPlayToEndTimeNotification
                                               object:self.player.currentItem];
    
    // APP进入活跃态的通知
    ReceiveNotification(@selector(toCheckThePlayerStatusAndGoPlay), UIApplicationDidBecomeActiveNotification)
}

- (void)toCheckThePlayerStatusAndGoPlay{
    //APP进入活跃状态, 检查播放器, 判断是否在播放, 如果暂停则继续播放
    if(_player){
        if (_player.rate != 0 && _player.error == nil){
            MOLogV(@"AVPlayer is playing");
        }
        else{
            MOLogV(@"AVPlayer is not playing");
            [_player play];
        }
    }
}

- (void)preparePlayback {
    if (self.player == nil) {
        NSURL *videoURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:[MOLVideoFunctions getVideoUrl] ofType:[MOLVideoFunctions getVideoType]]];
        
        // 初始化 AVPlayer
        AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:videoURL];
        self.player = [AVPlayer playerWithPlayerItem:playerItem];
        
        // 创建 AVPlayerLayer 并设置其属性
        self.playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];
        self.playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
        self.playerLayer.frame = CGRectMake(0.0, 0.0, SCREENWIDTH, SCREENHEIGHT);
        
        // 将 AVPlayerLayer 添加到视图的底层
        [self.view.layer insertSublayer:self.playerLayer atIndex:0];
        
        // 开始播放
        [self.player play];

    }

}

- (void)dealloc {

    // 停止并释放 AVPlayer
    [self.player pause];
    [self.player.currentItem cancelPendingSeeks];
    [self.player.currentItem.asset cancelLoading];
    self.player = nil;
}

// 播放结束通知的处理方法
- (void)playerDidFinishPlaying:(NSNotification *)notification {
    // 将播放头设置回视频的起始位置，实现循环播放
    [self.player seekToTime:kCMTimeZero];
    [self.player play];
}


#pragma mark - life cycle
- (void)viewDidLoad {
    [super viewDidLoad];

    if ([MOLVideoFunctions getUrlInfo] != nil) {
        self.isLoop = [MOLVideoFunctions getLoopMode];
        
        [self preparePlayback];
    }
}


- (void)viewWillAppear:(BOOL)animated {

    [super viewWillAppear:animated];
    [self getPlayerNotifications];
    
    [self.player play];
}

- (void)viewWillDisappear:(BOOL)animated {

    [super viewWillDisappear:animated];
    
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)viewDidDisappear:(BOOL)animated {

    [super viewDidDisappear:animated];
    
    [self.player pause];
}
@end