//
//  ViewController.m
//  VIMediaCacheDemo
//
//  Created by Vito on 5/17/16.
//  Copyright © 2016 Vito. All rights reserved.
//

#import "ViewController.h"
#import "VIMediaCache.h"
#import "PlayerView.h"

@interface ViewController ()

@property (nonatomic, strong) VIResourceLoaderManager *resourceLoaderManager;
@property (nonatomic, strong) AVPlayer *player;
@property (nonatomic, strong) AVPlayerItem *playerItem;
@property (nonatomic, strong) id timeObserver;
@property (nonatomic) CMTime duration;

@property (weak, nonatomic) IBOutlet PlayerView *playerView;
@property (weak, nonatomic) IBOutlet UISlider *slider;
@property (weak, nonatomic) IBOutlet UILabel *totalTimeLabel;
@property (weak, nonatomic) IBOutlet UILabel *currentTimeLabel;

@property (nonatomic, strong) VIMediaDownloader *downloader;

@end

@implementation ViewController

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [self.player removeTimeObserver:self.timeObserver];
    self.timeObserver = nil;
    [self.playerItem removeObserver:self forKeyPath:@"status"];
    [self.player removeObserver:self forKeyPath:@"timeControlStatus"];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self cleanCache];
    
    
//    NSURL *url = [NSURL URLWithString:@"https://mvvideo5.meitudata.com/56ea0e90d6cb2653.mp4"];
//    VIMediaDownloader *downloader = [[VIMediaDownloader alloc] initWithURL:url];
//    [downloader downloadFromStartToEnd];
//    self.downloader = downloader;
    
    [self setupPlayer];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(mediaCacheDidChanged:) name:VICacheManagerDidUpdateCacheNotification object:nil];
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    [self.player play];
}

- (void)cleanCache {
    unsigned long long fileSize = [VICacheManager calculateCachedSizeWithError:nil];
    NSLog(@"file cache size: %@", @(fileSize));
    NSError *error;
    [VICacheManager cleanAllCacheWithError:&error];
    if (error) {
        NSLog(@"clean cache failure: %@", error);
    }
    
    [VICacheManager cleanAllCacheWithError:&error];
}

- (IBAction)touchSliderAction:(UISlider *)sender {
    sender.tag = -1;
}

- (IBAction)sliderAction:(UISlider *)sender {
    CMTime duration = self.player.currentItem.asset.duration;
    CMTime seekTo = CMTimeMake((NSInteger)(duration.value * sender.value), duration.timescale);
    NSLog(@"seetTo %ld", (long)(duration.value * sender.value) / duration.timescale);
    __weak typeof(self)weakSelf = self;
    [self.player pause];
    [self.player seekToTime:seekTo completionHandler:^(BOOL finished) {
        sender.tag = 0;
        [weakSelf.player play];
    }];
}

- (IBAction)toggleAction:(id)sender {
    [self cleanCache];
    
    [self.playerItem removeObserver:self forKeyPath:@"status"];
    [self.player removeObserver:self forKeyPath:@"timeControlStatus"];
    
    [self.resourceLoaderManager cancelLoaders];
    
    NSURL *url = [NSURL URLWithString:@"https://mvvideo5.meitudata.com/56ea0e90d6cb2653.mp4"];
    AVPlayerItem *playerItem = [self.resourceLoaderManager playerItemWithURL:url];
    self.playerItem = playerItem;
    
    [self.playerItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];
    [self.player addObserver:self forKeyPath:@"timeControlStatus" options:NSKeyValueObservingOptionNew context:nil];
    [self.player replaceCurrentItemWithPlayerItem:playerItem];
}

#pragma mark - Setup

- (void)setupPlayer {

//        NSURL *url = [NSURL URLWithString:@"http://gedftnj8mkvfefuaefm.exp.bcevod.com/mda-hc2s2difdjz6c5y9/hd/mda-hc2s2difdjz6c5y9.mp4?playlist%3D%5B%22hd%22%5D&auth_key=1500559192-0-0-dcb501bf19beb0bd4e0f7ad30c380763&bcevod_channel=searchbox_feed&srchid=3ed366b1b0bf70e0&channel_id=2&d_t=2&b_v=9.1.0.0"];
//        NSURL *url = [NSURL URLWithString:@"https://mvvideo5.meitudata.com/56a9e1389b9706520.mp4"];
        NSURL *url = [NSURL URLWithString:@"https://mvvideo5.meitudata.com/56ea0e90d6cb2653.mp4"];

    VIResourceLoaderManager *resourceLoaderManager = [VIResourceLoaderManager new];
    self.resourceLoaderManager = resourceLoaderManager;
    
    AVPlayerItem *playerItem = [resourceLoaderManager playerItemWithURL:url];
    self.playerItem = playerItem;
    
    VICacheConfiguration *configuration = [VICacheManager cacheConfigurationForURL:url];
    if (configuration.progress >= 1.0) {
        NSLog(@"cache completed");
    }

    AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem];
//    AVPlayer *player = [AVPlayer playerWithURL:url];
    player.automaticallyWaitsToMinimizeStalling = NO;
    self.player = player;
    [self.playerView setPlayer:player];
    
    
    __weak typeof(self)weakSelf = self;
    self.timeObserver =
    [self.player addPeriodicTimeObserverForInterval:CMTimeMake(1, 10)
                                              queue:dispatch_queue_create("player.time.queue", NULL)
                                         usingBlock:^(CMTime time) {
                                             dispatch_async(dispatch_get_main_queue(), ^(void) {
                                                 if (weakSelf.slider.tag == 0) {
                                                     CGFloat duration = CMTimeGetSeconds(weakSelf.player.currentItem.duration);
                                                     weakSelf.totalTimeLabel.text = [NSString stringWithFormat:@"%.f", duration];
                                                     CGFloat currentDuration = CMTimeGetSeconds(time);
                                                     weakSelf.currentTimeLabel.text = [NSString stringWithFormat:@"%.f", currentDuration];
                                                     weakSelf.slider.value = currentDuration / duration;
                                                 }
                                             });
                                         }];
    
    [self.playerItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];
    [self.player addObserver:self forKeyPath:@"timeControlStatus" options:NSKeyValueObservingOptionNew context:nil];
    
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapPlayerViewAction:)];
    [self.playerView addGestureRecognizer:tap];
}

- (void)tapPlayerViewAction:(UITapGestureRecognizer *)gesture {
    if (gesture.state == UIGestureRecognizerStateEnded) {
        if (self.player.rate > 0.0) {
            [self.player pause];
        } else {
            [self.player play];
        }
    }
}

#pragma mark - KVO

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
                        change:(NSDictionary *)change context:(void *)context {
    if (object == self.playerItem && [keyPath isEqualToString:@"status"]) {
        NSLog(@"player status %@, rate %@, error: %@", @(self.playerItem.status), @(self.player.rate), self.playerItem.error);
        if (self.playerItem.status == AVPlayerItemStatusReadyToPlay) {
            dispatch_async(dispatch_get_main_queue(), ^(void) {
                CGFloat duration = CMTimeGetSeconds(self.playerItem.duration);
                self.totalTimeLabel.text = [NSString stringWithFormat:@"%.f", duration];
            });
        } else if (self.playerItem.status == AVPlayerItemStatusFailed) {
            // something went wrong. player.error should contain some information
            NSLog(@"player error %@", self.playerItem.error);
        }
    } else if (object == self.player && [keyPath isEqualToString:@"timeControlStatus"]) {
        NSLog(@"timeControlStatus: %@, reason: %@, rate: %@", @(self.player.timeControlStatus), self.player.reasonForWaitingToPlay, @(self.player.rate));
    }
}

#pragma mark - notification

- (void)mediaCacheDidChanged:(NSNotification *)notification {
    NSDictionary *userInfo = notification.userInfo;
    VICacheConfiguration *configuration = userInfo[VICacheConfigurationKey];
    NSArray<NSValue *> *cachedFragments = configuration.cacheFragments;
    long long contentLength = configuration.contentInfo.contentLength;
    
    NSInteger number = 100;
    NSMutableString *progressStr = [NSMutableString string];
    
    [cachedFragments enumerateObjectsUsingBlock:^(NSValue * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        NSRange range = obj.rangeValue;
        
        NSInteger location = roundf((range.location / (double)contentLength) * number);
        
        NSInteger progressCount = progressStr.length;
        [self string:progressStr appendString:@"0" muti:location - progressCount];
        
        NSInteger length = roundf((range.length / (double)contentLength) * number);
        [self string:progressStr appendString:@"1" muti:length];
        
        
        if (idx == cachedFragments.count - 1 && (location + length) <= number + 1) {
            [self string:progressStr appendString:@"0" muti:number - (length + location)];
        }
    }];
    
    NSLog(@"%@", progressStr);
}

- (void)string:(NSMutableString *)string appendString:(NSString *)appendString muti:(NSInteger)muti {
    for (NSInteger i = 0; i < muti; i++) {
        [string appendString:appendString];
    }
}

@end