using UnityEngine;
using UnityEngine.Networking;
using XGame.Framework.Asyncs;

namespace XGame.Framework.Asset
{
    internal class WebRequestAssetBundleAsync : Async, IAssetAsync
    {
        private UnityWebRequest request;
        private AsyncOperation operation;
        public string Path { get; internal set; }
        public uint Offset { get; internal set; }
        /// <summary>
        /// 此处先存bundleName
        /// </summary>
        public string AddressableName { get; internal set; }
        public override float Progress
        {
            get => operation != null ? operation.progress : 0;
            protected set => base.Progress = value;
        }

        public void Start()
        {
            //Log.Warn($"AssetBundleCreateRequestAsync Start. Path:{Path}");
            request = UnityWebRequestAssetBundle.GetAssetBundle(Path);
            operation = request.SendWebRequest();
            operation.completed += OnCompleted;
        }
        void OnCompleted(AsyncOperation async)
        {
            if (!async.isDone)
            {
                AssetsLog.Warn($"Assetbundle operation error. name:{AddressableName} Path:{Path}");
            }
            else if (request == null || !request.isDone)
            {
                AssetsLog.Warn($"Assetbundle request error. name:{AddressableName} Path:{Path}");
            }
            Completed();
        }

        public object GetResult()
        {
            object result = null;
            if (request != null)
            {
                //Log.Warn($"AssetBundleCreateRequestAsync Get bundle:{request.assetBundle? .GetInstanceID()??0} Path:{Path}");
                result = DownloadHandlerAssetBundle.GetContent(request);
            }
            if (result == null)
            {
                AssetsLog.Warn($"Assetbundle is null. name:{AddressableName} Path:{Path} request:{request != null}");
            }
            Clear();
            return result;
        }
        void Clear()
        {
            request = null;
            operation = null;
        }
    }
}