//
//  Sound.h
//  SoundDrop2
//
//  Created by Joshua Moerman on 1/9/13.
//  Copyright (c) 2013 Vadovas. All rights reserved.
//

#ifndef SoundDrop2_Sound_h
#define SoundDrop2_Sound_h

#include <iostream>

#include <OpenAL/al.h>
#include <OpenAL/alc.h>

#include "CDOpenALSupport.h"


namespace J {

struct AL {
	ALCdevice * device{nullptr};
	ALCcontext * context{nullptr};
	
	AL(){
		// Initializing sound:
		// NULL for the default device
		device = alcOpenDevice(NULL);
		if (device) {
			// NULL for no attributes
			context = alcCreateContext(device, NULL);
			alcMakeContextCurrent(context);
		}
	}
	
	~AL(){
		alcMakeContextCurrent(NULL);
		alcDestroyContext(context);
		alcCloseDevice(device);
	}
};

struct Buffer {
	ALuint buffer;
	
	Buffer(Buffer const &) = delete;
	Buffer & operator=(Buffer const &) = delete;
	
	Buffer(Buffer && b){
		std::swap(buffer, b.buffer);
	}
	
	Buffer & operator=(Buffer && b){
		std::swap(buffer, b.buffer);
		return *this;
	}
	
	Buffer(){
		alGenBuffers(1, &buffer);
	}
	
	~Buffer(){
		alDeleteBuffers(1, &buffer);
	}
};

inline Buffer load_wav(std::string filename){
	Buffer b;
	
	void *data;
	ALenum format;
	ALsizei sizeInBytes;
	ALsizei frequencyInHertz;
	
	data = CDGetOpenALAudioData((CFURLRef)[NSURL fileURLWithPath: [NSString stringWithUTF8String: filename.c_str()]], &sizeInBytes, &format, &frequencyInHertz);
	alBufferData(b.buffer, format, data, sizeInBytes, frequencyInHertz);
	free(data);
	
	return b;
}

struct Source {
	ALuint source;
	
	Source(Source const &) = delete;
	Source & operator=(Source const &) = delete;
	
	Source(Buffer const & buffer){
		int r = rand() % 10;
		float pitch = 0.5 + r*0.5;
		
		alGenSources(1, &source);
		alSourcei(source, AL_BUFFER, buffer.buffer);
		alSourcef(source, AL_PITCH, pitch); //?
	}
	
	void play(){
		// will restart if already playing
		alSourcePlay(source);
	}
	
	~Source(){
		// TODO: find out if this is needed
		// NOTE: Buffers which are attached to a source can not be deleted
		alSourcei(source, AL_BUFFER, 0);
		
		// this will stop the playing
		alDeleteSources(1, &source);
	}
};

} // namespace J

#endif