using System;
using System.Collections;
using System.Threading;
using System.Threading.Tasks;
using Cysharp.Threading.Tasks;
using UnityEngine;

namespace Stary.Evo.AudioCore
{
    public class VoicePlayer : AbstractAudio, IDisposable
    {
        private AudioSourceToken currentSource;

        public VoicePlayer(IResources resources) : base(resources)
        {
        }

        /// <summary>
        /// 播放语音
        /// </summary>
        /// <param name="audioData">{[clip:音频], [volume:音量],
        /// [onComplete:回调行为], [delayOnCompleteTime:延迟回调执行的时间],
        /// [is3DAudio:是否3D音频], [audio3DPosition:3D音频位置],
        /// [audio3DMaxDistance:3D音频最大距离]}</param>
        public override async void Play(AudioData audioData)
        {
            AudioSourceToken audioSourceToken = await PlayAudio(audioData);
            // 使用协程处理延迟和回调
            PlayAudioAWait(audioSourceToken,
                audioData.delayOnCompleteTime, audioData.onComplete, audioData.fadeDuration);
        }

        /// <summary>
        /// 异步播放语音
        /// </summary>
        /// <param name="audioData">{[clip:音频], [volume:音量],
        /// [onComplete:回调行为], [delayOnCompleteTime:延迟回调执行的时间],
        /// [is3DAudio:是否3D音频], [audio3DPosition:3D音频位置],
        /// [audio3DMaxDistance:3D音频最大距离],
        /// [cancellationToken:异步取消令牌]}</param>
        public override async UniTask PlayAsync(AudioData audioData)
        {
            AudioSourceToken audioSourceToken = await PlayAudio(audioData);
            await PlayAudioAWait(audioSourceToken, audioData.delayOnCompleteTime, audioData.fadeDuration);
        }


        private async UniTask<AudioSourceToken> PlayAudio(AudioData audioData)
        {
            if (Resources == null)
            {
                Debug.LogError("AudioCoreManager: Resources is null, please initialize it first.");
                return null;
            }

            // 停止当前正在播放的语音与旧协程,或旧异步
            Stop();
            audioData = Initialize(audioData);
            if (!string.IsNullOrEmpty(audioData.packageName) && !string.IsNullOrEmpty(audioData.packageName))
            {
                var clip = await Resources.LoadAssetAsync<AudioClip>(audioData.packageName, audioData.assetName);
                if (clip == null)
                {
                    Debug.LogErrorFormat($"从资源包【{audioData.packageName}】加载音频片段【{audioData.assetName}】失败");
                }
                else
                {
                    audioData.clip = clip;
                }
            }

            if (audioData.clip == null)
            {
                Debug.LogError("播放的音效音频片段为空");
                return null;
            }


            AudioSourceToken audioSourceToken = AudioSourcePool.Spawn();
            if (audioSourceToken == null)
            {
                Debug.LogError("音效池为空,无法播放音效");
                return null;
            }

            currentSource = audioSourceToken;

            currentSource.source.clip = audioData.clip;
            currentSource.source.volume = audioData.volume;

            // 设置2D与3D音频
            if (audioData.is3DAudio)
            {
                currentSource.source.transform.position = audioData.audio3DPosition;
                currentSource.source.spatialBlend = 1;
                currentSource.source.minDistance = 1f;
                if (audioData.audio3DMaxDistance != 0)
                {
                    currentSource.source.maxDistance = audioData.audio3DMaxDistance;
                }
                else
                {
                    // 默认3D最大距离为3米
                    currentSource.source.maxDistance = 3f;
                }
            }
            else
            {
                currentSource.source.transform.position = Vector3.zero;
                currentSource.source.spatialBlend = 0;
                currentSource.source.minDistance = 1f;
                currentSource.source.maxDistance = 500f;
            }

            currentSource.source.Play();
            FadeInMusic(currentSource.source, audioData.fadeDuration);
            return audioSourceToken;
        }

        /// <summary>
        /// 停止语音
        /// </summary>
        /// /// <param name="audioData">{[无可使用变量]}</param>
        public override void Stop()
        {
            // 停止当前协程
            if (currentSource != null && currentSource.source.isPlaying)
            {
                currentSource.source.Stop();
                AudioSourcePool.RecycleSpawn(currentSource);
                currentSource = null;
            }
        }

        public override void StopAll()
        {
            AudioSourcePool.RecycleAll();
        }

        public override AudioSource GetAudioSource()
        {
            return currentSource.source;
        }

        public void Dispose()
        {
            AudioSourcePool.RecycleAll();
        }
    }
}