#region File Description
//-----------------------------------------------------------------------------
// AudioManager.cs
//
// Microsoft XNA Community Game Platform
// Copyright (C) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
#endregion

#region Using Statements


using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Media;


#endregion

namespace HoneycombRush
{
    /// <summary>
    /// Component that manages audio playback for all sounds.
    /// </summary>
    public class AudioManager : GameComponent
    {
        #region Fields


        /// <summary>
        /// The singleton for this type.
        /// </summary>
        static AudioManager audioManager = null;
        public static AudioManager Instance
        {
            get
            {
                return audioManager;
            }
        }

        static readonly string soundAssetLocation = "Sounds/";

        // Audio Data        
        Dictionary<string, SoundEffectInstance> soundBank;
        Dictionary<string, Song> musicBank;


        #endregion

        #region Initialization


        private AudioManager(Game game)
            : base(game) { }

        /// <summary>
        /// Initialize the static AudioManager functionality.
        /// </summary>
        /// <param name="game">The game that this component will be attached to.</param>
        public static void Initialize(Game game)
        {
            audioManager = new AudioManager(game);
            audioManager.soundBank = new Dictionary<string, SoundEffectInstance>();
            audioManager.musicBank = new Dictionary<string, Song>();

            game.Components.Add(audioManager);
        }


        #endregion

        #region Loading Methodes


        /// <summary>
        /// Loads a single sound into the sound manager, giving it a specified alias.
        /// </summary>
        /// <param name="contentName">The content name of the sound file. Assumes all sounds are located under
        /// the "Sounds" folder in the content project.</param>
        /// <param name="alias">Alias to give the sound. This will be used to identify the sound uniquely.</param>
        /// <remarks>Loading a sound with an alias that is already used will have no effect.</remarks>
        public static void LoadSound(string contentName, string alias)
        {
            SoundEffect soundEffect = audioManager.Game.Content.Load<SoundEffect>(soundAssetLocation + contentName);
            SoundEffectInstance soundEffectInstance = soundEffect.CreateInstance();

            if (!audioManager.soundBank.ContainsKey(alias))
            {
                audioManager.soundBank.Add(alias, soundEffectInstance);
            }
        }

        /// <summary>
        /// Loads a single song into the sound manager, giving it a specified alias.
        /// </summary>
        /// <param name="contentName">The content name of the sound file containing the song. Assumes all sounds are 
        /// located under the "Sounds" folder in the content project.</param>
        /// <param name="alias">Alias to give the song. This will be used to identify the song uniquely.</param>
        /// /// <remarks>Loading a song with an alias that is already used will have no effect.</remarks>
        public static void LoadSong(string contentName, string alias)
        {
            Song song = audioManager.Game.Content.Load<Song>(soundAssetLocation + contentName);

            if (!audioManager.musicBank.ContainsKey(alias))
            {
                audioManager.musicBank.Add(alias, song);
            }
        }

        /// <summary>
        /// Loads and organizes the sounds used by the game.
        /// </summary>
        public static void LoadSounds()
        {
            LoadSound("10SecondCountDown", "10SecondCountDown");
            LoadSound("30SecondWarning", "30SecondWarning");
            LoadSound("BeeBuzzing_Loop", "BeeBuzzing_Loop");
            LoadSound("Defeat", "Defeat");
            LoadSound("DepositingIntoVat_Loop", "DepositingIntoVat_Loop");
            LoadSound("FillingHoneyPot_Loop", "FillingHoneyPot_Loop");
            LoadSound("HighScore", "HighScore");
            LoadSound("HoneyPotBreak", "HoneyPotBreak");
            LoadSound("SmokeGun_Loop", "SmokeGun_Loop");
            LoadSound("Stung", "Stung");
            LoadSound("Stunned", "Stunned");
            LoadSound("Victory", "Victory");
        }

        /// <summary>
        /// Loads and organizes the music used by the game.
        /// </summary>
        public static void LoadMusic()
        {
            //LoadSong("InGameSong_Loop","InGameSong_Loop");
            //LoadSong("MenuMusic_Loop","MenuMusic_Loop");
        }

        #endregion

        #region Sound Methods


        /// <summary>
        /// Indexer. Return a sound instance by name.
        /// </summary>
        public SoundEffectInstance this[string soundName]
        {
            get
            {
                if (audioManager.soundBank.ContainsKey(soundName))
                {
                    return audioManager.soundBank[soundName];
                }
                else
                {
                    return null;
                }
            }
        }

        /// <summary>
        /// Plays a sound by name.
        /// </summary>
        /// <param name="soundName">The name of the sound to play.</param>
        public static void PlaySound(string soundName)
        {
            // If the sound exists, start it
            if (audioManager.soundBank.ContainsKey(soundName))
            {
                audioManager.soundBank[soundName].Play();
            }
        }

        /// <summary>
        /// Plays a sound by name.
        /// </summary>
        /// <param name="soundName">The name of the sound to play.</param>
        /// <param name="isLooped">Indicates if the sound should loop.</param>
        public static void PlaySound(string soundName, bool isLooped)
        {
            // If the sound exists, start it
            if (audioManager.soundBank.ContainsKey(soundName))
            {
                if (audioManager.soundBank[soundName].IsLooped != isLooped)
                {
                    audioManager.soundBank[soundName].IsLooped = isLooped;
                }

                audioManager.soundBank[soundName].Play();
            }
        }


        /// <summary>
        /// Plays a sound by name.
        /// </summary>
        /// <param name="soundName">The name of the sound to play.</param>
        /// <param name="isLooped">Indicates if the sound should loop.</param>
        /// <param name="volume">Indicates if the volume</param>
        public static void PlaySound(string soundName, bool isLooped, float volume)
        {
            // If the sound exists, start it
            if (audioManager.soundBank.ContainsKey(soundName))
            {
                if (audioManager.soundBank[soundName].IsLooped != isLooped)
                {
                    audioManager.soundBank[soundName].IsLooped = isLooped;
                }

                audioManager.soundBank[soundName].Volume = volume;
                audioManager.soundBank[soundName].Play();
            }
        }

        /// <summary>
        /// Stops a sound mid-play. If the sound is not playing, this
        /// method does nothing.
        /// </summary>
        /// <param name="soundName">The name of the sound to stop.</param>
        public static void StopSound(string soundName)
        {
            // If the sound exists, stop it
            if (audioManager.soundBank.ContainsKey(soundName))
            {
                audioManager.soundBank[soundName].Stop();
            }
        }

        /// <summary>
        /// Stops all currently playing sounds.
        /// </summary>
        public static void StopSounds()
        {
            foreach (SoundEffectInstance sound in audioManager.soundBank.Values)
            {
                if (sound.State != SoundState.Stopped)
                {
                    sound.Stop();
                }
            }
        }

        /// <summary>
        /// Pause or resume all sounds.
        /// </summary>
        /// <param name="resumeSounds">True to resume all paused sounds or false
        /// to pause all playing sounds.</param>
        public static void PauseResumeSounds(bool resumeSounds)
        {
            SoundState state = resumeSounds ? SoundState.Paused : SoundState.Playing;

            foreach (SoundEffectInstance sound in audioManager.soundBank.Values)
            {
                if (sound.State == state)
                {
                    if (resumeSounds)
                    {
                        sound.Resume();
                    }
                    else
                    {
                        sound.Pause();
                    }
                }
            }
        }
        /// <summary>
        /// Play music by name. This stops the currently playing music first. Music will loop until stopped.
        /// </summary>
        /// <param name="musicSoundName">The name of the music sound.</param>
        /// <remarks>If the desired music is not in the music bank, nothing will happen.</remarks>
        public static void PlayMusic(string musicSoundName)
        {
            // If the music sound exists
            if (audioManager.musicBank.ContainsKey(musicSoundName))
            {
                // Stop the old music sound
                if (MediaPlayer.State != MediaState.Stopped)
                {
                    MediaPlayer.Stop();
                }

                try
                {
                MediaPlayer.IsRepeating = true;
                }
                catch (UnauthorizedAccessException)
                { 
                    // Simply do nothing. This will happen if the Zune application is launched.
                }

                try
                {
                MediaPlayer.Play(audioManager.musicBank[musicSoundName]);
                }
                catch (InvalidOperationException)
                {
                    // Simply do nothing. This will happen if the Zune application is launched.
                }
            }
        }

        /// <summary>
        /// Stops the currently playing music.
        /// </summary>
        public static void StopMusic()
        {
            if (MediaPlayer.State != MediaState.Stopped)
            {
                MediaPlayer.Stop();
            }
        }


        #endregion

        #region Instance Disposal Methods


        /// <summary>
        /// Clean up the component when it is disposing.
        /// </summary>
        protected override void Dispose(bool disposing)
        {
            try
            {
                if (disposing)
                {
                    foreach (var item in soundBank)
                    {
                        item.Value.Dispose();
                    }
                    soundBank.Clear();
                    soundBank = null;
                }
            }
            finally
            {
                base.Dispose(disposing);
            }
        }


        #endregion
    }
}