using System.IO;
using Thousandto.Update.Enum;
using Thousandto.Update.Log;
using Thousandto.Update.Trans;

namespace Thousandto.Update.Flow
{
    /// <summary>
    /// 1. 转移obb资源， android only
    /// </summary>
    public class Flow1TransResourceExOBB : BaseFlow
    {
        //平台类型
        private PlatformType _platformType;
        //资源转移功能实例
        TransResource _transInstance;

        private string _obbFileFullPath = "";

        public void SetExternalData(string sourcePath, PlatformType type, Thousandto.Update.Delegate.TransResourceFinishCallback transFinishCallback = null)
        {
            _platformType = type;

            switch (_platformType)
            {
                case PlatformType.Android:
                    _transInstance = new TransAndroidResource();
                    break;
                case PlatformType.IOS:
                    _transInstance = new TransIOSResource();
                    break;
                case PlatformType.Windows:
                    _transInstance = new TransPCResource();
                    break;
                default:
                    _transInstance = new TransPCResource();
                    break;
            }

            _obbFileFullPath = GetObbFullPath(sourcePath);
            UpdateLog.DEBUG_LOG("Obb full path:" + _obbFileFullPath);

            //全转移
            _transInstance.IsUnZipObb = true;
            _transInstance.SetUnzipPath(_obbFileFullPath, _storeDir, transFinishCallback);
        }

        public void ReInitTransData()
        {
            if (_transInstance != null)
                _transInstance.ReInit();
        }

        //强制转移资源，因为要更新资源，不管是基础资源还是补丁资源
        public void ForceTransWhenNeedUpdate()
        {
        }

        //强制做资源释放, 在ios通过游戏内更新分段资源时调用
        public void SetForceUnzip()
        {
        }

        public override void OnEnter(BaseFlow oldFlow)
        {
            base.OnEnter(oldFlow);

            //转移过资源，xml就从storePath取。否则从包内取
            ChangeLocalXmlPath(HasTransedResource());
        }

        public override int Work()
        {
            if (!CheckLastFlowResult()) return LastFlowResult;

            int ret = CodeDefine.RET_INIT;
            if (!checkNeedTrans())
            {
                ret = CodeDefine.RET_SUCCESS;
            }
            else
            {
                if (!string.IsNullOrEmpty(_obbFileFullPath) && File.Exists(_obbFileFullPath))
                {
                    //转移资源完成后调用
                    _transInstance.SetInternalCallback(() =>
                    {
                        File.Delete(_obbFileFullPath);
                    });

                    _transInstance.StartUnzipByThread();

                    bool success = _transInstance.GetTransReslult();

                    ret = success ? CodeDefine.RET_SUCCESS : CodeDefine.RET_FAIL_TRANS_FAIL;
                    _transInstance.CallFinish(success);
                }
                else
                    ret = CodeDefine.RET_SUCCESS;

            }
            return ret;
        }

        public override void Uninitialize()
        {
            LocalXml = null;
        }

        public override void GetCurDownInfo(out string url, out int total, out int downloaded)
        {
            base.GetCurDownInfo(out url, out total, out downloaded);
            url = "";
            total = _transInstance.GetTotalValue();
            downloaded = _transInstance.GetCurrentProgress();
        }

        public void TransResourceFinish(bool result)
        {

        }

        //判断是否需要转移资源
        private bool checkNeedTrans()
        {
            bool ret = false;

            if (_platformType != PlatformType.Android)
                return ret;

            return !string.IsNullOrEmpty(_obbFileFullPath) && File.Exists(_obbFileFullPath);
        }

        private string GetObbFullPath(string storePath)
        {
            string obbPath = storePath.Replace("/data/", "/obb/").Replace("files/StreamingAssets", "");
            UpdateLog.DEBUG_LOG("obb root path:" + obbPath);
            if(Directory.Exists(obbPath))
            {
                var files = Directory.GetFiles(obbPath, "*.obb");
                if (files.Length > 0)
                    return files[0];
            }
            return null;
        }
    }
}