//
//  OMPTContainer.m
//  OpenMPT
//
//  Created by Christopher Snowhill on 1/4/18.
//  Copyright 2018 __LoSnoCo__. All rights reserved.
//

#import <libOpenMPTOld/libopenmpt.hpp>

#import "OMPTContainer.h"
#import "OMPTDecoder.h"

#import "Logging.h"

@implementation OMPTOldContainer

+ (NSArray *)fileTypes
{
    return [OMPTOldDecoder fileTypes];
}

+ (NSArray *)mimeTypes 
{
	return nil;
}

+ (float)priority
{
    return [OMPTOldDecoder priority];
}

+ (NSArray *)urlsForContainerURL:(NSURL *)url
{
    if ([url fragment]) {
        // input url already has fragment defined - no need to expand further
        return [NSMutableArray arrayWithObject:url];
    }
    
    id audioSourceClass = NSClassFromString(@"AudioSource");
    id<CogSource> source = [audioSourceClass audioSourceForURL:url];
    
    if (![source open:url])
        return 0;
    
    if (![source seekable])
        return 0;
    
    [source seek:0 whence:SEEK_END];
    long size = [source tell];
    [source seek:0 whence:SEEK_SET];
    
    std::vector<char> data( static_cast<std::size_t>( size ) );
                       
    [source read:data.data() amount:size];
    
    try {
        std::map< std::string, std::string > ctls;
        openmpt::module * mod = new openmpt::module( data, std::clog, ctls );
        
        NSMutableArray *tracks = [NSMutableArray array];
        
        int i;
        int subsongs = mod->get_num_subsongs();
        
		delete mod;

		for (i = 0; i < subsongs; ++i) {
            [tracks addObject:[NSURL URLWithString:[[url absoluteString] stringByAppendingFormat:@"#%i", i]]];
        }
		
        return tracks;
    } catch ( std::exception & /*e*/ ) {
        return 0;
    }
}


@end