/*

     File: SAMAsset.m

 Abstract: SimpleAssetManager asset class.

  Version: 1.0

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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

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 */

#import "SAMAsset.h"

#import "FCPXMetadataKeys.h"

#import "scriptLog.h"

#import "MediaAssetHelperKeys.h"

const NSString*     kSAMMetadataKeyManagedAsset = @"com.example.apple-samplecode.simpleassetmanager.managedAsset";

const NSString*     kSAMMetadataKeyPreparedAsset = @"com.example.apple-samplecode.simpleassetmanager.prepareAsset";

const NSString*     kSAMMetadataKeyExpirationDate = @"com.example.apple-samplecode.simpleassetmanager.expeirationDate";

@implementation SAMAsset

{

    NSURL*          principalURL;

    NSURL*          folderLocation;

    NSString*       mediaExtension;

    NSString*       descExtension;

    NSMutableDictionary*    metadata;

    NSMutableDictionary*    dataOptions;

    AVAsset         *internalAsset;

    NSXMLDocument   *internalDescription;

}

// class methods that recognizes supported file types

+ (BOOL)isDescExtension:(NSString*)extension

{

    if ( [extension isEqualToString:@"fcpxml"] )

        return YES;

    else

        return NO;

}

+ (BOOL)isMediaExtension:(NSString*)extension

{

    if ( [extension isEqualToString:@"mov"] )

        return YES;

    else if ( [extension isEqualToString:@"mp4"] )

        return YES;

    else

        return NO;  

}

/* Instead of sythesizing our properties here, we implement them manually

 in order to perform logging for debugging purposes. */

/* after initializing our superclasses, we set the properties we're

 maintaining in this class to their default values.

 See the description of the NSCreateCommand for more information about

 when your init method will be called.  */

- (instancetype)init

{

    self = [super init];

    if (self) {

        principalURL = nil;

        folderLocation = nil;

        mediaExtension = nil;

        descExtension = nil;

    }

    /* Put the logging statement later after the superclass was initialized so we will be able to report the uniqueID */

    SLOG(@"init SAMAsset %@", self.uniqueID);

    return self;

}

- (instancetype)init: (NSString*)assetName at:(NSURL*)location media:(NSString*)mediaExt desc:(NSString*)descExt

{

    self = [super init];

    if (self) {

        [self setName:assetName];

        principalURL = [location URLByAppendingPathComponent:assetName];

        folderLocation = location;

        mediaExtension = mediaExt;

        descExtension = descExt;

    }

    /* I put the logging statement later after the superclass was initialized

     so we will be able to report the uniqueID */

    SLOG(@"init SAMAsset %@", self.uniqueID);

    return self;

}

- (instancetype)init:(NSURL*)url 

{

    self = [super init];

    if (self) {

        NSString* extension = [url pathExtension];

        principalURL = [url URLByDeletingPathExtension];

        folderLocation = [principalURL URLByDeletingLastPathComponent];

        [self setName:[principalURL lastPathComponent]];

        if ( [SAMAsset isMediaExtension:extension] ) {

            mediaExtension = extension;

            descExtension = @"fcpxml";

        }

        else if ( [SAMAsset isDescExtension:extension] ) {

            descExtension = extension;

            mediaExtension = @"mov";

        }

    }

    SLOG(@"init SAMAsset %@", self.uniqueID);

    return self;

}

/* standard deallocation of our members followed by superclass.

 nothing out of the ordinary here. */

- (void)dealloc

{

    SLOG(@"del SAMAsset %@", self.uniqueID);

    folderLocation = nil;

    mediaExtension = nil;

    descExtension = nil;

    principalURL = nil;

}

/* standard getter methods for the folderLocation, mediaExtension, descriptionExtension, and principalURL properties */

- (NSURL*)folderLocation

{

    SLOG(@"SAMAsset %@ property folderLocation %@", self.uniqueID, folderLocation);

    return folderLocation;

}

- (NSString *)mediaExtension

{

    SLOG(@"SAMAsset %@ property mediaExtension %@", self.uniqueID, mediaExtension);

    return mediaExtension;

}

- (void)setMediaExtension:(NSString *)newMediaExtension

{

    SLOG(@"SAMAsset %@ setting property mediaExtension %@", self.uniqueID, newMediaExtension);

    mediaExtension = newMediaExtension;

}

- (NSString *)descExtension

{

    SLOG(@"SAMAsset %@ property descExtension %@", self.uniqueID, descExtension);

    return descExtension;

}

- (void)setDescExtension:(NSString *)newDescExtension

{

    SLOG(@"SAMAsset %@ setting property descExtension %@", self.uniqueID, newDescExtension);

    descExtension = newDescExtension;

}

- (NSURL*)principalURL

{

    SLOG(@"SAMAsset %@ property principalURL %@", self.uniqueID, principalURL);

    return principalURL;

}

-(NSURL*)mediaFile

{

    if ( principalURL != nil && mediaExtension != nil )

        return [principalURL URLByAppendingPathExtension:mediaExtension];

    else

        return nil;

}

-(NSURL*)descFile

{

    if ( principalURL != nil && descExtension != nil )

        return [principalURL URLByAppendingPathExtension:descExtension];

    else

        return nil;

}

- (BOOL)hasMedia

{

    return self.mediaExtension != nil;

}

- (BOOL)hasDescription

{

    return self.descExtension != nil;

}

-(NSDictionary*)locationInfo

{

    // build the asset location dictionary

    NSMutableDictionary*    assetLocation = [NSMutableDictionary dictionaryWithCapacity:0];

    [assetLocation setObject:self.folderLocation forKey:kMediaAssetLocationFolderKey];

    [assetLocation setObject:self.name forKey:kMediaAssetLocationBasenameKey];

    if ( self.hasMedia ) {

        [assetLocation setObject:[NSNumber numberWithBool:YES] forKey:kMediaAssetLocationHasMediaKey];

    }

    if ( self.hasDescription ) {

        [assetLocation setObject:[NSNumber numberWithBool:YES] forKey:kMediaAssetLocationHasDescriptionKey];

    }

    return [NSDictionary dictionaryWithDictionary:assetLocation];

}

- (NSDictionary*)metadata

{

    return [NSDictionary dictionaryWithDictionary:metadata];

}

- (void)setMetadata:(NSDictionary *)newMetadata

{

    metadata = [NSMutableDictionary dictionaryWithDictionary:newMetadata];

}

- (void)addMetadata:(id)value forKey:(NSString*)key

{

    if ( metadata == nil )

        metadata = [NSMutableDictionary dictionaryWithCapacity:0];

    [metadata setObject:value forKey:key];

}

- (NSDictionary*)dataOptions

{

    return [NSDictionary dictionaryWithDictionary:dataOptions];

}

- (void)setDataOptions:(NSDictionary *)newOptions

{

    dataOptions = [NSMutableDictionary dictionaryWithDictionary:newOptions];

}

- (void)setDataOption:(id)option forKey:(NSString*)key

{

    [dataOptions setObject:option forKey:key];

}

- (id)dataOptionForKey:(NSString*)key

{

    return [dataOptions objectForKey:key];

}

- (void)loadMedia

{

    NSURL       *theFile = self.mediaFile;

    if ( [theFile checkResourceIsReachableAndReturnError:nil] ) {

        internalAsset = [AVAsset assetWithURL:theFile];

    }   

}

- (void)loadDescription

{

    NSURL       *theFile = self.descFile;

    if ( [theFile checkResourceIsReachableAndReturnError:nil] ) {

        NSError*        loadError = nil;

        internalDescription = [[NSXMLDocument alloc] initWithContentsOfURL:theFile options:0 error:&loadError];

    }

}

- (NSString*)duration

{

    if ( [self.mediaFile checkResourceIsReachableAndReturnError:nil] ) {

        CMTime  dur = [internalAsset duration];

        return [NSString stringWithFormat:@"%lld/%ds", dur.value, dur.timescale];

    }

    else

        return @"n/a";

}

- (CGSize) frameSize

{

    if ( ! [self hasRoles] ) {

        NSArray* videoTracks = [internalAsset tracksWithMediaType:AVMediaTypeVideo];

        if ( videoTracks != nil && [videoTracks count] > 0 ) {

            AVAssetTrack* videoTrack = [videoTracks objectAtIndex:0];

            return [videoTrack naturalSize];

        }

        else

            return CGSizeZero;

    }

    return CGSizeZero;

}

- (NSString*) frameDuration

{

    if ( ! [self hasRoles] ) {

        NSArray* videoTracks = [internalAsset tracksWithMediaType:AVMediaTypeVideo];

        if ( videoTracks != nil && [videoTracks count] > 0 ) {

            AVAssetTrack* videoTrack = [videoTracks objectAtIndex:0];

            float frameRate = [videoTrack nominalFrameRate];

            CMTimeScale timeScale = [videoTrack naturalTimeScale];

            return [NSString stringWithFormat:@"%ld/%ds", (long)( timeScale / frameRate ), timeScale];

        }

        else

            return  @"n/a";

    }

    return @"n/a";

}

- (NSString*)shareID

{

    return [metadata objectForKey:kFCPXShareMetadataKeyShareID];

}

- (NSString*)episodeID

{

    return [metadata objectForKey:kFCPXShareMetadataKeyEpisodeID];

}

- (NSNumber*)episodeNumber

{

    return [metadata objectForKey:kFCPXShareMetadataKeyEpisodeNumber];

}

- (BOOL)mediaLoaded

{

    return internalAsset != nil;

}

- (BOOL)descriptionLoaded

{

    return internalDescription != nil;

}

- (BOOL)hasRoles

{

    return NO;

}

@end