using System;
using System.Threading;
//using System.Threading.Tasks;
using OpenTK;
using OpenTK.Audio;
using OpenTK.Audio.OpenAL;



namespace org.budnhead.audio
{
	public class nhPlayer
	{

		private int _source = AL.GenSource();
		public int source
		{
			get
			{return _source;}
		}


		private static int _playerNumber;
		public int number
		{
			get
			{ return _playerNumber;}
		}

		//private static EffectsExtension _efx;
		//private int _filter;



		private float _gain = 1.0f;
		public float gain
		{
			set
			{
				if (value <= 0.0f)
				{
					_gain = 0.0f;
				}
				else if (value >= 1.0f)
				{
					_gain = 1.0f;
				}else
				{
					_gain = value;
				}
			}
			get
			{return _gain;}
		}

		public Vector3 position = new Vector3(0.0f, 0.0f, 0.0f);
		public Vector3 velocity = new Vector3(0.0f, 0.0f, 0.0f);
		//public bool loop = false;

		private float _rollOf = 2.0f;
		private float _refDist = 0.0f;
		private float _maxDist = 100.0f;


		private int _state;


		//private int[] _seqBuffer = { };



		public nhPlayer()
		{

			//_filter = _efx.GenFilter();
			//_efx.BindFilterToSource(_source, _filter);

			AL.Source(_source, ALSourcef.RolloffFactor, _rollOf);
			AL.Source(_source, ALSourcef.ReferenceDistance, _refDist);
			AL.Source(_source, ALSourcef.MaxDistance, _maxDist);
			//AL.Source(_source, ALSourcei.EfxDirectFilter, _filter);
			//AL.Source(_source, ALSourcei.EfxDirectFilter, )


			//_filterEfx.Filter(_filter, EfxFilteri.FilterType, EfxFilterType.Lowpass);
			//_efx.Filter(_filter, EfxFilterf.LowpassGainHF, 0.5f);
			Interlocked.Increment(ref _playerNumber);

		}


		//>>>>>>>>>>>>>>>>>METHODS

		public bool state()
		{
			AL.GetSource(_source, ALGetSourcei.SourceState, out _state);

			if ((ALSourceState)_state == ALSourceState.Playing)
			{
				return true;
			}else if((ALSourceState)_state == ALSourceState.Stopped)
			{
				return false;
			}else
			{
				return false;
			}


		}
		public void play(int buffer = 0, float gain = 1.0f, bool loop = false)
		{

			_gain = gain;
			AL.Source(_source, ALSourcef.RolloffFactor, _rollOf);
			AL.Source(_source, ALSourcef.ReferenceDistance, _refDist);
			AL.Source(_source, ALSourcef.MaxDistance, _maxDist);

			if (buffer != 0)
			{
				AL.Source(_source, ALSourcei.Buffer, buffer);
			}else{
				throw new NotSupportedException("Not existing Buffer.");
			}

			AL.Source(_source, ALSourceb.Looping, loop);
			AL.SourcePlay(_source);
			AL.Source(_source, ALSourcef.Gain, _gain);
			AL.Source(_source, ALSource3f.Position, position.X, position.Y, position.Z);
			AL.Source(_source, ALSource3f.Velocity, velocity.X, velocity.Y, velocity.Z);

		}


		public void stop()
		{
			AL.SourceStop(_source);
		}

		public void setDistanceAttenuation(float rollOf = 2.0f, float refDistance = 1.0f, float maxDistance = 100.0f)
		{
			_rollOf = rollOf;
			_refDist = refDistance;
			_maxDist = maxDistance;
		}

		public void setPosition(Vector3 position)
		{
			this.position = position;
		}

		public void setVelocity(Vector3 velocity)
		{
			this.velocity = velocity;
		}


/*


		public void playSeq(int buffer01, int buffer02, int buffer03)
		{
			_seqBuffer[0] = buffer01;
			_seqBuffer[1] = buffer02;
			_seqBuffer[2] = buffer03;

			Thread _playThread = new Thread(_playSeq);
			_playThread.Start();
		}






		private void _playSeq()
		{


			int _buffersToProcess = 3;

			AL.Source(_source, ALSourcei.Buffer, _buffer);
			AL.Source(_source, ALSourceb.Looping, loop);

			AL.SourceQueueBuffers(_source, 3, _seqBuffer);


			AL.SourcePlay(_source);
			//_isplaying = true;

			AL.Source(_source, ALSourcef.Gain, _gain);
			AL.Source(_source, ALSource3f.Position, position[0], position[1], position[2]);
			AL.Source(_source, ALSource3f.Velocity, velocity[0], velocity[1], velocity[2]);


			do
			{
				Thread.Sleep(16);
				AL.GetSource(_source, ALGetSourcei.SourceState, out _state);
				AL.GetSource(_source, ALGetSourcei.BuffersProcessed, out _buffersToProcess);

				while(_buffersToProcess != 0)
				{
					//AL.SourceUnqueueBuffers(_source, 1, );
				}

			}
			while ((ALSourceState)_state == ALSourceState.Playing);


			AL.SourceStop(_source);


		}

*/		


		public void deletePlayer()
		{
			AL.DeleteSource(_source);
		}




	}
}