using UnityEngine;
using System.Collections.Generic;

public enum SoundEffectChannels
{
    StartRolling,
    Rolling,
    PebbleCollision,
    PebbleCollision_OtherPebble,
    ProjectileBreak,
    AttachmentBlowOff,
    Explosion,
    LaunchSound,
    DescendSound,
    TaftSound,
    BoingSound,
    SpeedFlowerBoostSound,
    Pickup,
    Swipe,
    Others,
    MonsterKilled,
    MonsterHit
}

public class SoundEffectPlayer : MonoBehaviour
{
    private static SoundEffectPlayer _player = null;
    public static SoundEffectPlayer Instance
    {
        get
        {
            if(_player == null)
            {
                GameObject go = new GameObject("SoundEffectPlayer");
                _player = go.AddComponent<SoundEffectPlayer>();
                DontDestroyOnLoad(go);
            }

            return _player;
        }
    }


    /// <summary>
    /// Channel instance. Just holds cooldown and timer
    /// </summary>
    public class PlayChannel
    {
        public float Cooldown = 0f;
        public float Timer = 0.1f;
    }

    /// <summary>
    /// Holds all active channels
    /// </summary>
    Dictionary<SoundEffectChannels, PlayChannel> _channels = new Dictionary<SoundEffectChannels, PlayChannel>();

        /// <summary>
    /// Plays a sound effect using a cooldown to avoid spam
    /// </summary>
    /// <param name="cooldown">
    /// A <see cref="System.Single"/>
    /// </param>
    /// <param name="clip">
    /// A <see cref="AudioClip"/>
    /// </param>
    /// <param name="channel">
    /// A <see cref="System.Int32"/>
    /// </param>
    public void PlayWithCooldown(float cooldown, AudioClip clip, SoundEffectChannels channel, float volume)
    {
        PlayWithCooldown(cooldown, clip, channel, Vector3.zero, volume);
    }

    /// <summary>
    /// Plays a sound effect using a cooldown to avoid spam
    /// </summary>
    /// <param name="cooldown">
    /// A <see cref="System.Single"/>
    /// </param>
    /// <param name="clip">
    /// A <see cref="AudioClip"/>
    /// </param>
    /// <param name="channel">
    /// A <see cref="System.Int32"/>
    /// </param>
    public void PlayWithCooldown(float cooldown, AudioClip clip, SoundEffectChannels channel)
    {
        PlayWithCooldown(cooldown, clip, channel, Vector3.zero, 1f);
    }

    /// <summary>
    ///
    /// </summary>
    /// <param name="cooldown">
    /// A <see cref="System.Single"/>
    /// </param>
    /// <param name="clip">
    /// A <see cref="AudioClip"/>
    /// </param>
    /// <param name="channel">
    /// A <see cref="SoundEffectChannels"/>
    /// </param>
    /// <param name="position">
    /// A <see cref="Vector3"/>
    /// </param>
    public void PlayWithCooldown(float cooldown, AudioClip clip, SoundEffectChannels channel, Vector3 position, float volume)
    {
        if(clip == null)
        {
            Debug.LogWarning("Trying to play null-sound in channel " + channel.ToString());
            return;
        }

        bool play = false;
        if(!_channels.ContainsKey(channel))
        {
            _channels[channel] = new SoundEffectPlayer.PlayChannel();
            play = true;
        }
        else if(_channels[channel].Timer >= _channels[channel].Cooldown)
        {
            play = true;
        }

        // Reset play when playing
        if(play)
        {
            AudioSource.PlayClipAtPoint(clip, position, volume);
            _channels[channel].Cooldown = cooldown;
            _channels[channel].Timer = 0f;
        }
    }

    /// <summary>
    /// Update timers in all channels
    /// </summary>
    void Update()
    {
        foreach(PlayChannel channel in _channels.Values)
        {
            channel.Timer += Time.smoothDeltaTime;
        }
    }
}