using SRF;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.Audio;

//声音管理器
public class AudioManager : MonoSingleton<AudioManager>
{
    private Queue<string> _CVFiles = new Queue<string>();
    private AudioSource _cvSource;
    private AudioSource _seSource;
    private AudioSource _bgmSource;
    private readonly float _cvCDTime = 0.2f;
    private float _cvCDTimer = 0;
    //音乐音量
    private float _musicVolume;
    private float _cvVolume;

    private Queue<(string, AudioClip)> _cacheMusicSource = new Queue<(string, AudioClip)>();
    private const int _musciSourceCacheNumber = 20;

    public float MusicVolume
    {
        get => _musicVolume;
        set => _musicVolume = value;
    }

    private float _seVolume;

    public float SEVolume
    {
        get => _seVolume;
        set => _seVolume = value;
    }

    public float CVVolume
    {
        get => _cvVolume;
        set => _cvVolume = value;
    }

    public override void Init()
    {
        _cvSource = GetAudioSource("CVSource");
        _seSource = GetAudioSource("SESource"); 
        _bgmSource = GetAudioSource("BGMSource"); 
    }

    private AudioSource GetAudioSource(string name)
    {
        var transAS = transform.Find(name);
        AudioSource retVal;
        if (transAS != null)
        {
            retVal = transAS.GetComponent<AudioSource>();
        }
        else
        {
            GameObject asGo = new GameObject(name);
            asGo.transform.SetParent(transform);
            retVal = asGo.GetComponentOrAdd<AudioSource>();
            retVal.name = name;
        }
        return retVal;
    }

    //播放音乐
    public void PlayMusic(string name)
    {

    }

    public void PlaySE(string name)
    {
        var clip = GetAudioClip("SE", name);
        _seSource.clip = clip;
        _seSource.Play();
    }

    public void PlayCV(string name)
    {

    }

    public void PlayCVInQueue(string name)
    {
        _CVFiles.Enqueue(name);
    }

    private void Update()
    {
        //播放队列中音频
        if (_CVFiles.Count > 0)
        {
            //正在播放
            if (_cvSource.isPlaying)
            {
                return;
            }
            //播放完成后等待0.5秒
            if (_cvCDTimer < _cvCDTime)
            {
                _cvCDTimer += Time.deltaTime;
                return;
            }
            _cvCDTimer = 0;

            var name = _CVFiles.Dequeue();
            var clip = GetAudioClip("CV", name);
            _cvSource.clip = clip;
            _cvSource.Play();
        }
    }

    public void StopMusic()
    {

    }

    public void StopSE()
    {
        _seSource.Stop();
    }

    public void StopCV()
    {

    }

    /// <summary>
    /// 获取音频文件
    /// 总缓存10个
    /// </summary>
    /// <param name="type"></param>
    /// <param name="path"></param>
    /// <returns></returns>
    private AudioClip GetAudioClip(string type, string path)
    {
        var retVal = _cacheMusicSource.ToArray().ToList().Find(x => x.Item1.Equals($"{type}/{path}"));
        if (retVal.Item2 != null)
        {
            return retVal.Item2;
        }
        var clip = Resources.Load<AudioClip>($"{type}/{path}");
        if (clip == null)
        {
            LogPrint.Error($"AudioClip {type}/{path} is not exist!");
            return null;
        }
        _cacheMusicSource.Enqueue(($"{type}/{path}", clip));

        if (_cacheMusicSource.Count > _musciSourceCacheNumber)
        {
            var tmp = _cacheMusicSource.Dequeue();
            Resources.UnloadAsset(tmp.Item2);
        }

        return clip;
    }
}