/*
DSFML - The Simple and Fast Multimedia Library for D

Copyright (c) 2013 - 2015 Jeremy DeHaan (dehaan.jeremiah@gmail.com)

This software is provided 'as-is', without any express or implied warranty.
In no event will the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications,
and to alter it and redistribute it freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software.
If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution
*/

module dsfml.audio.sound;

import core.time;

import dsfml.audio.soundbuffer;
import dsfml.audio.soundsource;

import dsfml.system.vector3;

/++
 + Regular sound that can be played in the audio environment.
 + Sound is the class used to play sounds.
 + 
 + It provides:
 + 		- Control (play, pause, stop)
 + 		- Ability to modify output parameters in real-time (pitch, volume, ...)
 + 		- 3D spatial features (position, attenuation, ...).
 + 
 + Sound is perfect for playing short sounds that can fit in memory and require no latency, like foot steps or gun shots. For longer sounds, like background musics or long speeches, rather see Music (which is based on streaming).
 + 
 + In order to work, a sound must be given a buffer of audio data to play. Audio data (samples) is stored in SoundBuffer, and attached to a sound with the setBuffer() function. The buffer object attached to a sound must remain alive as long as the sound uses it. Note that multiple sounds can use the same sound buffer at the same time.
 + 
 + See_Also: http://www.sfml-dev.org/documentation/2.0/classsf_1_1Sound.php#details
 + Authors: Laurent Gomila, Jeremy DeHaan
 +/
class Sound : SoundSource
{
	import std.typecons:Rebindable;

	//Const AND able to be rebound. Word.
	private Rebindable!(const(SoundBuffer)) m_buffer;
	package sfSound* sfPtr;

	this()
	{
		sfPtr = sfSound_construct();
	}

	this(const(SoundBuffer) buffer)
	{
		this();

		setBuffer(buffer);

	}
	//TODO: copy constructor?

	~this()
	{
		import dsfml.system.config;
		mixin(destructorOutput);
		//stop the sound
		stop();

		sfSound_destroy(sfPtr);
	}

	/** 
	 * Whether or not the sound should loop after reaching the end.
	 * 
	 * If set, the sound will restart from beginning after reaching the end and so on, until it is stopped or setLoop(false) is called.
	 * 
	 * The default looping state for sound is false.
	 */
	@property
	{
		void isLooping(bool loop)
		{
			sfSound_setLoop(sfPtr, loop);
		}

		bool isLooping()
		{
			return sfSound_getLoop(sfPtr);
		}
	}
	
	/**
	 * Change the current playing position (from the beginning) of the sound.
	 * 
	 * The playing position can be changed when the sound is either paused or playing.
	 */
	@property
	{
		void playingOffset(Duration offset)
		{
			sfSound_setPlayingOffset(sfPtr, offset.total!"usecs");
		}

		Duration playingOffset()
		{
			return usecs(sfSound_getPlayingOffset(sfPtr));
		}
	}

	/// Get the current status of the sound (stopped, paused, playing).
	/// Returns: Current status of the sound
	@property
	{
		Status status()
		{
			return cast(Status)sfSound_getStatus(sfPtr);
		}
	}

	//from SoundSource
	/**
	 * The pitch of the sound.
	 * 
	 * The pitch represents the perceived fundamental frequency of a sound; thus you can make a sound more acute or grave by changing its pitch. A side effect of changing the pitch is to modify the playing speed of the sound as well. The default value for the pitch is 1.
	 */
	@property
	{
		void pitch(float newPitch)
		{
			sfSound_setPitch(sfPtr, newPitch);
		}
		
		float pitch()
		{
			return sfSound_getPitch(sfPtr);
		}
	}
	
	/**
	 * The volume of the sound.
	 * 
	 * The volume is a vlue between 0 (mute) and 100 (full volume). The default value for the volume is 100.
	 */
	@property
	{
		void volume(float newVolume)
		{
			sfSound_setVolume(sfPtr, newVolume);
		}
		
		float volume()
		{
			return sfSound_getVolume(sfPtr);
		}
	}
	
	/**
	 * The 3D position of the sound in the audio scene.
	 * 
	 * Only sounds with one channel (mono sounds) can be spatialized. The default position of a sound is (0, 0, 0).
	 */
	@property
	{
		void position(Vector3f newPosition)
		{
			sfSound_setPosition(sfPtr, newPosition.x, newPosition.y, newPosition.z);
		}
		
		Vector3f position()
		{
			Vector3f temp;
			sfSound_getPosition(sfPtr, &temp.x, &temp.y, &temp.z);
			return temp;
		}
	}
	
	/**
	 * Make the sound's position relative to the listener (true) or absolute (false).
	 * 
	 * Making a sound relative to the listener will ensure that it will always be played the same way regardless the position of the listener.  This can be useful for non-spatialized sounds, sounds that are produced by the listener, or sounds attached to it. The default value is false (position is absolute).
	 */
	@property
	{
		void relativeToListener(bool relative)
		{
			sfSound_setRelativeToListener(sfPtr, relative);
		}
		
		bool relativeToListener()
		{
			return sfSound_isRelativeToListener(sfPtr);
		}
	}
	
	/**
	 * The minimum distance of the sound.
	 * 
	 * The "minimum distance" of a sound is the maximum distance at which it is heard at its maximum volume. Further than the minimum distance, it will start to fade out according to its attenuation factor. A value of 0 ("inside the head of the listener") is an invalid value and is forbidden. The default value of the minimum distance is 1.
	 */
	@property
	{
		void minDistance(float distance)
		{
			sfSound_setMinDistance(sfPtr, distance);
		}
		
		float minDistance()
		{
			return sfSound_getMinDistance(sfPtr);
		}
	}
	
	/**
	 * The attenuation factor of the sound.
	 * 
	 * The attenuation is a multiplicative factor which makes the sound more or less loud according to its distance from the listener. An attenuation of 0 will produce a non-attenuated sound, i.e. its volume will always be the same whether it is heard from near or from far. 
	 * 
	 * On the other hand, an attenuation value such as 100 will make the sound fade out very quickly as it gets further from the listener. The default value of the attenuation is 1.
	 */
	@property
	{
		void attenuation(float newAttenuation)
		{
			sfSound_setAttenuation(sfPtr, newAttenuation);
		}
		
		float attenuation()
		{
			return sfSound_getAttenuation(sfPtr);
		}
	}



	//soundsource


	// Property? 
	// (note: if this is changed to a property, change the 
	// documentation at the top of the file accordingly)
	/*
	 * Set the source buffer containing the audio data to play. It is important to note that the sound buffer is not copied, thus the SoundBuffer instance must remain alive as long as it is attached to the sound.
	 * 
	 * Params:
	 * 		buffer =	Sound buffer to attach to the sound
	 */
	void setBuffer(const(SoundBuffer) buffer)
	{
		m_buffer = buffer;
		sfSound_setBuffer(sfPtr, buffer.sfPtr);
	}

	/// Pause the sound.
	/// 
	/// This function pauses the sound if it was playing, otherwise (sound already paused or stopped) it has no effect.
	void pause()
	{
		sfSound_pause(sfPtr);
	}

	/**
	 * Start or resume playing the sound.
	 * 
	 * This function starts the stream if it was stopped, resumes it if it was paused, and restarts it from beginning if it was it already playing.
	 * 
	 * This function uses its own thread so that it doesn't block the rest of the program while the sound is played.
	 */
	void play()
	{
		sfSound_play(sfPtr);
	}

	/// Stop playing the sound.
	/// 
	/// This function stops the sound if it was playing or paused, and does nothing if it was already stopped. It also resets the playing position (unlike pause()).
	void stop()
	{
		sfSound_stop(sfPtr);
	}

}

unittest
{
	version(DSFML_Unittest_Audio)
	{
		import std.stdio;
		import dsfml.system.clock;
		import core.time;


		writeln("Unit test for Sound class");

		//first, get a sound buffer

		auto soundbuffer = new SoundBuffer();
	
		if(!soundbuffer.loadFromFile("res/TestSound.ogg"))
		{
			//error
			return;
		}

		float duration = soundbuffer.getDuration().total!"seconds";

		auto sound = new Sound(soundbuffer);

		//sound.relativeToListener(true);

		auto clock = new Clock();
		//play the sound!
		sound.play();


		while(clock.getElapsedTime().total!"seconds" < duration)
		{
			//wait for sound to finish
		}

		//clock.restart();

		//sound.relativeToListener(false);



		writeln();
	}
}

private extern(C):

struct sfSound;

sfSound* sfSound_construct();

sfSound* sfSound_copy(const sfSound* sound);

void sfSound_destroy(sfSound* sound);

void sfSound_play(sfSound* sound);

void sfSound_pause(sfSound* sound);

void sfSound_stop(sfSound* sound);

void sfSound_setBuffer(sfSound* sound, const sfSoundBuffer* buffer);

void sfSound_setLoop(sfSound* sound, bool loop);

bool sfSound_getLoop(const sfSound* sound);

int sfSound_getStatus(const sfSound* sound);

void sfSound_setPitch(sfSound* sound, float pitch);

void sfSound_setVolume(sfSound* sound, float volume);

void sfSound_setPosition(sfSound* sound, float positionX, float positionY, float positionZ);

void sfSound_setRelativeToListener(sfSound* sound, bool relative);

void sfSound_setMinDistance(sfSound* sound, float distance);

void sfSound_setAttenuation(sfSound* sound, float attenuation);

void sfSound_setPlayingOffset(sfSound* sound, long timeOffset);

float sfSound_getPitch(const sfSound* sound);

float sfSound_getVolume(const sfSound* sound);

void sfSound_getPosition(const sfSound* sound, float* positionX, float* positionY, float* positionZ);

bool sfSound_isRelativeToListener(const sfSound* sound);

float sfSound_getMinDistance(const sfSound* sound);

float sfSound_getAttenuation(const sfSound* sound);

long sfSound_getPlayingOffset(const sfSound* sound);