using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading;

using Android.App;

using Android.Content;

using Android.Media;

using Android.OS;

using Android.Runtime;

using Android.Util;

using Android.Views;

using Android.Widget;



namespace Microsoft.Xna.Framework.Audio

{

    public class Sound

    {

        internal MediaPlayer _player;

        private float _Volume;

        private bool _Looping;



        private static bool Running = true;

        private static Queue<Action> WorkItems = new Queue<Action>();



        private static void Enqueue(Action workItem)

        {

            lock (Sound.WorkItems)

            {

                Sound.WorkItems.Enqueue(workItem);

                Monitor.Pulse(Sound.WorkItems);

            }

        }



        private static void Worker(object state)

        {

            while (Sound.Running)

            {

                Action workItem;



                lock (Sound.WorkItems)

                {

                    if (Sound.WorkItems.Count == 0)

                        Monitor.Wait(Sound.WorkItems);



                    workItem = Sound.WorkItems.Dequeue();

                }



                try

                {

                    workItem();

                }

                catch

                {

                    Log.Debug("Sound.Worker" , "Sound thread: Work Exception");

                }

            }

        }



        static Sound()

        {

            ThreadPool.QueueUserWorkItem(Worker);

        }

        

        private Sound(MediaPlayer player)

        {

            _player = player;

        }

		

		public void Dispose()

		{

			_player.Dispose();

		}



        public float Volume

        {

            get { return this._Volume; }

            set

            {

                this._Volume = value;

                if (this._player == null)

                    return;



                _player.SetVolume(value, value);



            }

        }



        public bool Looping

        {

            get { return this._Looping; }

            set

            {

                if (this._Looping != value) {

                    this._Looping = value;



                    if (_player == null)

                        return;



                    _player.Looping = value;

                }

            }



        }



        public void Play()

        {

            if (this._player == null)

                return;



            Sound.Enqueue(_player.Start);

        }

		

		public void Pause()

        {

            if (this._player == null)

                return;



            lock (Sound.WorkItems) {

                _player.Pause();

            }

        }

		

        public void Stop()

        {

            if (this._player == null)

                return;



            lock (Sound.WorkItems) {

                _player.Stop();

            }

        }

		

		public float Pan

        {

            get;

			set;

        }

		

		public bool Playing

		{

			get 

			{ 

				return _player.IsPlaying;

			}

		}



        internal bool IsPrepared { get; private set; }



        protected void OnPrepared(object sender, EventArgs e)

        {

            IsPrepared = true;

        }



        public static Sound Create(string assetPath, float volume, bool looping)

        {

            MediaPlayer player = new MediaPlayer();

            Sound sound = new Sound(player);

			//This breaks the platformer sample. Not sure if it works anywhere else

            //player.SetDataSource(Game.contextInstance.Assets.OpenFd(assetPath).FileDescriptor);

			player.SetDataSource(assetPath);

            player.Prepared += sound.OnPrepared;

            sound.Looping = looping;

            sound.Volume = volume;

            

            Sound.Enqueue(player.Prepare);



            return sound;

        }



        public static Sound CreateAndPlay(string url, float volume, bool looping)

        {

            Sound sound = Sound.Create(url, volume, looping);

            sound.Play();



            return sound;

        }



    }

}