using UnityEngine;
using System.Collections.Generic;

public class SoundsManager : MonoBehaviour
{
    private static SoundsManager m_instance = null;

    List<AudioSource> m_audioSourses = new List<AudioSource>();
    bool m_inited = false;
    Dictionary<string, AudioClip> m_loadedAudioClips = new Dictionary<string, AudioClip>();

    //------------------------------------------------------------------
    public static SoundsManager Instance
    {
        get { return m_instance; }
    }

    //------------------------------------------------------------------
    void Init ()
    {
        m_instance = this;
        AudioSource[] allAudioSources = GetComponents<AudioSource>();
        for (int i = 0; i < allAudioSources.Length; ++i)
            m_audioSourses.Add(allAudioSources[i]);
      
        SetVolume(1f);
        m_inited = true;

        DontDestroyOnLoad(this);
	}
    //------------------------------------------------------------------
    public void SetVolume( float volumeValue )
    {
        for ( int i = 0; i < m_audioSourses.Count; ++i )
            m_audioSourses[i].volume = volumeValue;
    }
    //------------------------------------------------------------------
    public AudioSource PlaySound( string soundName, float delay = 0f, bool needLoop = false, float volume = 0.6f )
    {
        if (!GlobalsVar.gNeedPlaySounds)
            return null;

        int count = GetPlayedSoundCount(soundName);
        if (count > 1)
            return null;

        string filePath = "Sounds/" + soundName;
        AudioClip clip = null;
        if (m_loadedAudioClips.ContainsKey(soundName))
            clip = m_loadedAudioClips[soundName];

        if (!clip)
        {
            clip = Resources.Load<AudioClip>(filePath);
            m_loadedAudioClips[soundName] = clip;
        }

        if (clip)
        {
            AudioSource audioSource = GetFreeAudioSource();
            if (audioSource)
            {
                audioSource.volume = volume;
                audioSource.clip = clip;
                audioSource.loop = needLoop;

                if (delay > 0f)
                    audioSource.PlayDelayed(delay);
                else
                    audioSource.Play();

                return audioSource;
            }
            else
            {
                CommonFunctions.myassert(false);
                return null;
            }
        }
        else
            CommonFunctions.myassert(false, soundName + "sound not found");

        return null;
    }

    //------------------------------------------------------------------
    int GetPlayedSoundCount(string name)
    {
        int soundCount = 0;
        foreach (AudioSource audioSource in m_audioSourses)
        {
            if (audioSource.isPlaying && audioSource.clip.name == name)
                soundCount++;
        }

        return soundCount;
    }

    //------------------------------------------------------------------
    AudioSource GetFreeAudioSource()
    {
        foreach ( AudioSource audioSource in m_audioSourses )
        {
            if (audioSource.isPlaying)
                continue;

            return audioSource;
        }

        CommonFunctions.myassert(false, "");
        return null;
    }

    //------------------------------------------------------------------
    public void StopAllSounds()
    {
        foreach (AudioSource audioSource in m_audioSourses)
        {
            if (audioSource.isPlaying)
                audioSource.Stop();
        }
    }

    //------------------------------------------------------------------
    public void Update ()
    {
        if (!m_inited)
            Init();
    }
}