//
//  ZFMediaPlayback.h
//  ZFPlayer
//
// Copyright (c) 2016年 任子丰 ( http://github.com/renzifeng )
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#import <Foundation/Foundation.h>
#import "ZFPlayerView.h"

NS_ASSUME_NONNULL_BEGIN

typedef NS_ENUM(NSUInteger, ZFPlayerPlaybackState) {
    ZFPlayerPlayStateUnknown = 0,
    ZFPlayerPlayStatePlaying,
    ZFPlayerPlayStatePaused,
    ZFPlayerPlayStatePlayFailed,
    ZFPlayerPlayStatePlayStopped
};

typedef NS_OPTIONS(NSUInteger, ZFPlayerLoadState) {
    ZFPlayerLoadStateUnknown        = 0,
    ZFPlayerLoadStatePrepare        = 1 << 0,
    ZFPlayerLoadStatePlayable       = 1 << 1,
    ZFPlayerLoadStatePlaythroughOK  = 1 << 2, // Playback will be automatically started.
    ZFPlayerLoadStateStalled        = 1 << 3, // Playback will be automatically paused in this state, if started.
};

typedef NS_ENUM(NSInteger, ZFPlayerScalingMode) {
    ZFPlayerScalingModeNone,       // No scaling.
    ZFPlayerScalingModeAspectFit,  // Uniform scale until one dimension fits.
    ZFPlayerScalingModeAspectFill, // Uniform scale until the movie fills the visible bounds. One dimension may have clipped contents.
    ZFPlayerScalingModeFill        // Non-uniform scale. Both render dimensions will exactly match the visible bounds.
};

@protocol ZFPlayerMediaPlayback <NSObject>

@required
/// The view must inherited `ZFPlayerView`,this view deals with some gesture conflicts.
@property (nonatomic) ZFPlayerView *view;

@optional
/// The player volume, 0...1.0
/// Only affects audio volume for the player instance and not for the device.
/// You can change device volume or player volume as needed,change the player volume you can folllow the `ZFPlayerMediaPlayback` protocol.
@property (nonatomic) float volume;

/// The player muted
/// indicates whether or not audio output of the player is muted. Only affects audio muting for the player instance and not for the device.
/// You can change device volume or player muted as needed,change the player muted you can folllow the `ZFPlayerMediaPlayback` protocol.
@property (nonatomic, getter=isMuted) BOOL muted;

/// Playback speed,0.5...2
@property (nonatomic) float rate;

/// The player current play time.
@property (nonatomic, readonly) NSTimeInterval currentTime;

/// The player total time.
@property (nonatomic, readonly) NSTimeInterval totalTime;

/// The player buffer time.
@property (nonatomic, readonly) NSTimeInterval bufferTime;

/// The player seek time.
@property (nonatomic) NSTimeInterval seekTime;

/// The player play state,playing or not playing.
@property (nonatomic, readonly) BOOL isPlaying;

/// Determines how the content scales to fit the view. Defaults to ZFPlayerScalingModeNone.
@property (nonatomic) ZFPlayerScalingMode scalingMode;

/**
 @abstract Check whether video preparation is complete.
 @discussion isPreparedToPlay processing logic
 
 * If isPreparedToPlay is TRUE, you can call [ZFPlayerMediaPlayback play] API start playing;
 * If isPreparedToPlay to FALSE, direct call [ZFPlayerMediaPlayback play], in the play the internal automatic call [ZFPlayerMediaPlayback prepareToPlay] API.
 * Returns YES if prepared for playback.
 */
@property (nonatomic, readonly) BOOL isPreparedToPlay;

/// The play asset URL.
@property (nonatomic) NSURL *assetURL;

/// The video size.
@property (nonatomic, readonly) CGSize presentationSize;

/// The playback state.
@property (nonatomic, readonly) ZFPlayerPlaybackState playState;

/// The player load state.
@property (nonatomic, readonly) ZFPlayerLoadState loadState;

/// The block invoked when the player is Ready to play.
@property (nonatomic, copy, nullable) void(^playerPrepareToPlay)(id<ZFPlayerMediaPlayback> asset, NSURL *assetURL);

/// The block invoked when the player play progress changed.
@property (nonatomic, copy, nullable) void(^playerPlayTimeChanged)(id<ZFPlayerMediaPlayback> asset, NSTimeInterval currentTime, NSTimeInterval duration);

/// The block invoked when the player play buffer changed.
@property (nonatomic, copy, nullable) void(^playerBufferTimeChanged)(id<ZFPlayerMediaPlayback> asset, NSTimeInterval bufferTime);

/// The block invoked when the player playback state changed.
@property (nonatomic, copy, nullable) void(^playerPlayStatChanged)(id<ZFPlayerMediaPlayback> asset, ZFPlayerPlaybackState playState);

/// The block invoked when the player load state changed.
@property (nonatomic, copy, nullable) void(^playerLoadStatChanged)(id<ZFPlayerMediaPlayback> asset, ZFPlayerLoadState loadState);

/// The block invoked when the player play end.
@property (nonatomic, copy, nullable) void(^playerDidToEnd)(id<ZFPlayerMediaPlayback> asset);

/// Prepares the current queue for playback, interrupting any active (non-mixible) audio sessions.
- (void)prepareToPlay;

/// Reload player.
- (void)reloadPlayer;

/// Play playback.
- (void)play;

/// Pauses playback.
- (void)pause;

/// Replay playback.
- (void)replay;

/// Stop playback.
- (void)stop;

/// Video UIImage at the current time.
- (UIImage *)thumbnailImageAtCurrentTime;

/// Replace the current playback URL.
- (void)replaceCurrentAssetURL:(NSURL *)assetURL;

/// Use this method to seek to a specified time for the current player and to be notified when the seek operation is complete.
- (void)seekToTime:(NSTimeInterval)time completionHandler:(void (^ __nullable)(BOOL finished))completionHandler;

@end

NS_ASSUME_NONNULL_END