using System.Collections;
using UnityEngine;
using GFGGame.Launcher;
using YooAsset;

namespace GFGGame
{
    public class MusicManager : SingletonMonoBase<MusicManager>
    {
        private AudioSource player;
        private string currentName;
        private AssetOperationHandle handle;
        private Coroutine coroutine;
        private float settingVolumn = 1f;       // 设置音量
        private float tempVolume = 1f;          // 临时音量
        private float changeBaseValue = 0.01f;  // 缓动单位改变基数

        private bool _isOn = true;
        public bool isOn
        {
            get
            {
                return _isOn;
            }
            set
            {
                if (_isOn != value)
                {
                    _isOn = value;
                    if (_isOn)
                    {
                        if (currentName != null)
                        {
                            PlayCroutine(currentName, true);
                        }
                    }
                    else
                    {
                        Stop();
                    }
                    LocalCache.SetBool(GameConfig.MUSIC_KEY, _isOn);
                }
            }
        }


        private void Awake()
        {
            player = this.gameObject.AddComponent<AudioSource>();
            player.loop = true;
            isOn = LocalCache.GetBool(GameConfig.MUSIC_KEY, true);
            settingVolumn = LocalCache.GetFloat(GameConfig.MUSIC_VOLUMN_KEY, 1.0f);
            player.volume = settingVolumn;
        }

        private void Update()
        {
            if (player.clip == null || !isOn)
            {
                return;
            }

            // 播放语音时背景音乐变小
            if (VoiceManager.Instance.IsPlaying())
            {
                tempVolume = 0.17f;
            }
            else
            {
                tempVolume = settingVolumn;
            }

            // 音量缓动变化
            if (player.volume != tempVolume)
            {
                player.volume = Mathf.Lerp(player.volume, tempVolume, changeBaseValue);
                if (Mathf.Abs(player.volume - tempVolume) <= 0.05)
                {
                    player.volume = tempVolume;
                }
            }
        }

        public void PlayCroutine(string path, bool must = false, float volume = 1.0f)
        {
            if (currentName != path || must)
            {
                currentName = path;
                if (coroutine != null)
                {
                    StopCoroutine(coroutine);
                }
                handle?.Release();
                if (_isOn)
                {
                    coroutine = StartCoroutine(Play(path, volume));
                }
            }
        }

        private IEnumerator Play(string path, float volume = 1.0f)
        {
            //AudioClip clip = GFGAsset.Load<AudioClip>(path);
            handle = YooAssets.LoadAssetAsync<AudioClip>(path);
            yield return handle;
            player.clip = handle.AssetObject as AudioClip;
            player.volume = volume;
            player.Play();
        }

        public float GetSoundTime()
        {
            if (player.clip != null)
            {
                return player.clip.length;
            }
            return 0;
        }
        public void Pause()
        {
            player.Pause();
        }
        public void UnPause()
        {
            player.UnPause();
        }
        public void Stop()
        {
            handle?.Release();
            player?.Stop();
        }

        public void SetVolume(float volume)
        {
            player.volume = volume;
        }

        public void SetSettingVolumn(float volume)
        {
            settingVolumn = volume;
        }

        public float GetSettingVolumn()
        {
            return settingVolumn;
        }
    }
}