namespace QFramework
{
    using UnityEngine;
    using System.Collections;
    using UnityEngine.Networking;

    public static class LocalAudioResUtil
    {
        public static string ToLocalAudioResName(this string selfFilePath)
        {
            return string.Format("LocalAudio:{0}", selfFilePath);
        }
    }

    /// <summary>
    /// 本地音频加载器
    /// </summary>
    public class LocalAudioRes : Res
    {
        private string mFullPath;
        private string mHashCode;
        private object mRawAsset;

        UnityWebRequest request;
        public static LocalAudioRes Allocate(string name)
        {
            var res = SafeObjectPool<LocalAudioRes>.Instance.Allocate();
            if (res != null)
            {
                res.AssetName = name;
                res.SetUrl(name.Substring(11));
            }
            return res;
        }

        public void SetDownloadProgress(int totalSize, int download)
        {

        }

        public string LocalResPath
        {
            get { return string.Format("{0}{1}", AssetBundlePathHelper.PersistentDataPath4Photo, mHashCode); }
        }

        public virtual object RawAsset
        {
            get { return mRawAsset; }
        }

        public bool NeedDownload
        {
            get { return RefCount > 0; }
        }

        public string Url
        {
            get { return mFullPath; }
        }

        public int FileSize
        {
            get { return 1; }
        }

        public void SetUrl(string url)
        {
            if (string.IsNullOrEmpty(url))
            {
                return;
            }

            mFullPath = url;
            mHashCode = string.Format("Photo_{0}", mFullPath.GetHashCode());
        }

        public override bool UnloadImage(bool flag)
        {
            return false;
        }

        public override bool LoadSync()
        {
            return false;
        }

        public override void LoadAsync()
        {
            if (!CheckLoadAble())
            {
                return;
            }

            if (string.IsNullOrEmpty(mAssetName))
            {
                return;
            }

            DoLoadWork();
        }

        private void DoLoadWork()
        {
            State = ResState.Loading;

            OnDownLoadResult(true);

            //检测本地文件是否存在
            /*
            if (!File.Exists(LocalResPath))
            {
                ResDownloader.S.AddDownloadTask(this);
            }
            else
            {
                OnDownLoadResult(true);
            }
            */
        }

        protected override void OnReleaseRes()
        {
            if (mAsset != null)
            {
                GameObject.Destroy(mAsset);
                mAsset = null;
            }

            mRawAsset = null;
        }

        public override void Recycle2Cache()
        {
            SafeObjectPool<LocalAudioRes>.Instance.Recycle(this);
        }

        public override void OnRecycled()
        {

        }

        public void DeleteOldResFile()
        {
            //throw new NotImplementedException();
        }

        public void OnDownLoadResult(bool result)
        {
            if (!result)
            {
                OnResLoadFaild();
                return;
            }

            if (RefCount <= 0)
            {
                State = ResState.Waiting;
                return;
            }

            ResMgr.Instance.PushIEnumeratorTask(this);
        }

        //完全的WWW方式,Unity 帮助管理纹理缓存，并且效率貌似更高
        // TODO:persistantPath 用 read
        public override IEnumerator DoLoadAsync(System.Action finishCallback)
        {
            AudioType type = AudioType.MPEG;

            if (mFullPath.EndsWith("mp3"))
            {
                type = AudioType.MPEG;
            }
            else if (mFullPath.EndsWith("ogg"))
            {
                type = AudioType.OGGVORBIS;
            }
            else if (mFullPath.EndsWith("wav"))
            {
                type = AudioType.WAV;
            }
            using (UnityWebRequest request = UnityWebRequestMultimedia.GetAudioClip(mFullPath, type))
            {
                yield return request.SendWebRequest();

                if (request.result != UnityWebRequest.Result.Success)
                {
                    Debug.LogError(string.Format("Res:{0}, WWW Errors:{1}", mFullPath, request.error));
                    OnResLoadFaild();
                    finishCallback();
                    yield break;
                }
                else
                {
                    // Convert the downloaded data to an AudioClip
                    AudioClip clip = DownloadHandlerAudioClip.GetContent(request);
                    mAsset = clip;
                }

                if (RefCount <= 0)
                {
                    OnResLoadFaild();
                    finishCallback();
                    yield break;
                }
            }

            State = ResState.Ready;

            finishCallback();
        }

        protected override float CalculateProgress()
        {
            if (request == null)
            {
                return 0;
            }

            return request.downloadProgress;
        }

        /*
        public IEnumerator StartIEnumeratorTask2(Action finishCallback)
        {
            if (refCount <= 0)
            {
                OnResLoadFaild();
                finishCallback();
                yield break;
            }

            WWW www = new WWW("file://" + LocalResPath);
            yield return www;
            if (www.error != null)
            {
                Log.E("WWW Error:" + www.error);
                OnResLoadFaild();
                finishCallback();
                yield break;
            }

            if (!www.isDone)
            {
                Log.E("NetImageRes WWW Not Done! Url:" + m_Url);
                OnResLoadFaild();
                finishCallback();

                www.Dispose();
                www = null;

                yield break;
            }

            if (refCount <= 0)
            {
                OnResLoadFaild();
                finishCallback();

                www.Dispose();
                www = null;
                yield break;
            }

            TimeDebugger dt = new TimeDebugger("Tex");
            dt.Begin("LoadingTask");
            Texture2D tex = www.texture;
            tex.Compress(true);
            dt.End();
            dt.Dump(-1);

            m_Asset = tex;
            www.Dispose();
            www = null;

            resState = eResState.kReady;

            finishCallback();
        }
        */
    }
}