using System.Collections.Generic;
using System.Linq;
using FileTransDataObject;
using Google.Protobuf.WellKnownTypes;
using Sog;

namespace SMCenter
{
	class CenterFilePullMng : Singleton<CenterFilePullMng>
	{
        public CmdInfo pullCmd;

        public FileRecvMgr recvMgr;

        public bool isFinish;

        private List<string> pullHosts;

        private long lastTickTime;

        private long beginPullTime;

        public CenterFilePullMng()
		{
			recvMgr = new FileRecvMgr();
			recvMgr._SendFileContentReq = SendFileContentReq;
			recvMgr._SendFileRecvStateReq = SendFileRecvStateReq;

            pullHosts = new List<string>();
            isFinish = true;
        }

        public int DoPullCmd(CmdInfo cmd, out string msg)
        {
            if (pullCmd != null)
            {
                msg = string.Format("last pull not finish, cmd {0} pull host num {1}"
                    , pullCmd.CMD, recvMgr.recvHosts.Count);
                TraceLog.Error("CenterFilePullMng.DoPullCmd {0}", msg);
                return -1;
            }

            msg = "";
            BeginPull(cmd);
            return 0;
        }

        private void BeginPull(CmdInfo cmd)
        {
            pullCmd = cmd;
            isFinish = false;
            beginPullTime = AppTime.ServerAppTime.GetTime();
            pullHosts.Clear();
            pullHosts.AddRange(pullCmd.m_procs.Values.Select(p => p.SMApp.HostName));
        }

        public void Clear()
        {
            TraceLog.Debug("CenterFilePullMng.Clear");

            pullCmd = null;
            isFinish = true;
            beginPullTime = 0;
            recvMgr.Clear();
            pullHosts.Clear();
        }

        public void CancelPull()
        {
            if (pullCmd == null)
            {
                return;
            }

            TraceLog.Trace("CenterFilePullMng.CancelPull cmd {0}", pullCmd.CMD);

            foreach (string host in pullHosts)
            {
                recvMgr.CancelTrans(host);
            }
        }

        public void Tick(long nowMs)
        {
            if (nowMs < lastTickTime + 1000)
            {
                return;
            }

            lastTickTime = nowMs;

            recvMgr.Tick(nowMs);

            if (! isFinish)
            {
                int finishNum = 0;
                foreach (string host in pullHosts)
                {
                    var recvNode = recvMgr.GetRecvNode(host);
                    if (recvNode == null)
                    {
                        // 10秒后还没收到任何TransNotify算失败
                        if (nowMs > beginPullTime + 10000)
                        {
                            finishNum++;
                        }
                    }
                    else if (recvNode.IsFinish)
                    {
                        finishNum++;
                    }
                }

                if (finishNum == pullHosts.Count)
                {
                    isFinish = true;
                }
            }
        }

		public void OnTransFileNotify(SMTransFileNotify notify)
        {
            recvMgr.OnTransFileNotify(notify);
        }


		public void OnFileContentRes(SMFileContentRes res)
		{
            recvMgr.OnFileContentRes(res);
		}


        public void OnFileRecvStateRes(ClientInfo client, SMFileRecvStateRes res)
        {
            recvMgr.OnFileRecvStateRes(res);
        }
		

		private void SendFileContentReq(FileRecvNode recvNode, FileRecvData fileData)
		{
			var client = SMCenterNet.Instance.GetClientInfoByName(recvNode.senderHost);
			if (client == null)
			{
				TraceLog.Error("CenterFilePullMng.SendFileContentReq agent {0} not register", recvNode.senderHost);
                return;
            }

            var req = new SMFileContentReq
            {
                FileName = fileData.fileName,
                FileMd5 = fileData.fileMd5,
                HostName = SMCenterUtils.HostName,
                ContentOffset = fileData.ReqFileOffset,
                TransSeq = recvNode.transSeq
            };
			client.SendMsg(req, SMMsgID.FileContentReq);
		}

		private void SendFileRecvStateReq(FileRecvNode recvNode)
		{
            var client = SMCenterNet.Instance.GetClientInfoByName(recvNode.senderHost);
            if (client == null)
            {
                TraceLog.Error("CenterFilePullMng.SendFileRecvStateReq agent {0} not register", recvNode.senderHost);
                return;
            }

			SMFileRecvStateReq req = new SMFileRecvStateReq();
            req.TransSeq = recvNode.transSeq;
            req.HostName = SMCenterUtils.HostName;
            foreach (FileRecvData fileData in recvNode.fileList)
            {
                req.FileList.Add(new FileRecvState
                {
                    FileName = fileData.fileName,
                    FileMd5 = fileData.fileMd5,
                    RecvState = fileData.recvState,
                });
            }
			client.SendMsg(req, SMMsgID.FileRecvStateReq);
		}
    }
}