using System;
using System.Collections.Generic;
using System.ComponentModel.Design;
using System.Linq;
using System.Threading.Tasks;

using Sog;
using ProtoCSStruct;

namespace Friend
{
    /// <summary>
    /// 好友数据的内存cache
    /// 处理逻辑是如果需要处理好友数据，那么先把数据拉取到内存，这样写起逻辑来比较简单，处理完后如果一段时间内不再访问，则淘汰
    /// </summary>
    public static class FriendCacheSvc
    {
		public static SSQueryFriendInfoCacheReq m_SSQueryFriendInfoCacheReq = new SSQueryFriendInfoCacheReq();

        public static SSQueryFriendInfoCacheRes m_SSQueryFriendInfoCacheRes = new SSQueryFriendInfoCacheRes();

        public static SSFriendOpReq m_SSFriendOpReq = new SSFriendOpReq();

        public static void OnStop()
        {
            var cache = FriendServerUtils.GetFriendInfoCacheTable();
            if (cache.ErrIconCount != 0)
            {
                TraceLog.Error("FriendCacheOp.OnStop error, ErrIconCount {0}", cache.ErrIconCount);
                TraceLog.Stat("FriendCacheOp.OnStop error, ErrIconCount {0}", cache.ErrIconCount);
            }
        }

        public static bool IsAllDataSave()
        {
            return FriendInfoCache.m_selfIDMap.Count == 0;
        }

        public static void SendDBSaveFriendListReq(ref FriendCacheInfoStruct infoStruct, bool newInsert)
        {
            SSSaveFriendListReq req = new SSSaveFriendListReq();
            FriendOp.TransFriendCacheInfoStruct(ref infoStruct, ref req.Self, ref req.List, ref req.OpData);
            req.Uid = infoStruct.Self.Uid;
            req.DataSeq = infoStruct.GetDataSeqSave().DataSeq;
            req.NewInsert = newInsert;

            infoStruct.GetDataSeqSave().OnSaveReq(FriendServerUtils.GetTimeMs());

            uint dbServerID = FriendSvrIDUtils.GetDBServerID(infoStruct.Self.Uid);
            FriendServerUtils.GetPacketSender().SendToServerByID(dbServerID, (int)SSGameMsgID.SaveFriendListReq, ref req, infoStruct.Self.Uid);
        }

        public static void SendDBOrFriendSvrQueryFriendInfo(long uid, long fromUid, QueryFriendInfoCacheReason reason)
        {
            // 玩家属于当前服务器, 转给DB查询, 否则转给目标friendSvr处理
            if (FriendUtils.IsPlayerBelongThisServer(uid))
            {
                SendDBQueryFriendInfoCache(uid, fromUid, reason);
            }
            else
            {
                SendFriendSvrQueryFriendInfoCache(uid, fromUid, reason);
            }
        }



        public static void SendDBQueryFriendInfoCache(long uid, long fromUid, QueryFriendInfoCacheReason reason)
        {
            MakeQueryFriendInfoCacheReq(uid, fromUid, reason);

            uint dbServerID = FriendSvrIDUtils.GetDBServerID(uid);
            FriendServerUtils.GetPacketSender().SendToServerByID(dbServerID, (int)SSGameMsgID.QueryFriendInfoCacheReq,
                ref m_SSQueryFriendInfoCacheReq, uid, FriendServerUtils.GetAppID());
        }

        public static void SendFriendSvrQueryFriendInfoCache(long uid, long fromUid, QueryFriendInfoCacheReason reason)
        {
            MakeQueryFriendInfoCacheReq(uid, fromUid, reason);

            // 转给玩家所在FriendSvr
            FriendServerUtils.GetPacketSender().SendToFriendServer((int)SSGameMsgID.QueryFriendInfoCacheReq,
                ref m_SSQueryFriendInfoCacheReq, uid, FriendServerUtils.GetAppID());
        }

        public static void SendDBQueryFriendInfoCacheOnFriendOp(long submit, int opType, long target, QueryFriendInfoCacheReason reason)
        {
            MakeQueryFriendInfoCacheReq(submit, opType, target, reason);

            uint dbServerID = FriendSvrIDUtils.GetDBServerID(target);
            FriendServerUtils.GetPacketSender().SendToServerByID(dbServerID, (int)SSGameMsgID.QueryFriendInfoCacheReq,
                ref m_SSQueryFriendInfoCacheReq, target, FriendServerUtils.GetAppID());
        }

        public static void SendDBQueryFriendInfoCacheBySaveChat(long uid, long fromUid, ref CSChatRes chatRes)
        {
            MakeQueryFriendInfoCacheReq(uid, fromUid, QueryFriendInfoCacheReason.SaveChat);
            m_SSQueryFriendInfoCacheReq.ChatRes = chatRes;

            uint dbServerID = FriendSvrIDUtils.GetDBServerID(uid);
            FriendServerUtils.GetPacketSender().SendToServerByID(dbServerID, (int)SSGameMsgID.QueryFriendInfoCacheReq,
                ref m_SSQueryFriendInfoCacheReq, uid, FriendServerUtils.GetAppID());
        }

        public static void SendDBQueryFriendInfoCacheByQueryChat(long uid, long fromUid, long seq)
        {
            MakeQueryFriendInfoCacheReq(uid, fromUid, QueryFriendInfoCacheReason.QueryChat);
            m_SSQueryFriendInfoCacheReq.ChatSeq = seq;

            uint dbServerID = FriendSvrIDUtils.GetDBServerID(uid);
            FriendServerUtils.GetPacketSender().SendToServerByID(dbServerID, (int)SSGameMsgID.QueryFriendInfoCacheReq,
                ref m_SSQueryFriendInfoCacheReq, uid, FriendServerUtils.GetAppID());
        }

        private static void MakeQueryFriendInfoCacheReq(long uid, long fromUid, QueryFriendInfoCacheReason reason)
        {
            m_SSQueryFriendInfoCacheReq.Clear();
            m_SSQueryFriendInfoCacheReq.FromUid = fromUid; //查找发起者
            m_SSQueryFriendInfoCacheReq.Uid = uid;         //被查找者
            m_SSQueryFriendInfoCacheReq.Reason = reason;
        }

        private static void MakeQueryFriendInfoCacheReq(long submit, int opType, long target, QueryFriendInfoCacheReason reason)
        {
            m_SSQueryFriendInfoCacheReq.Clear();
            m_SSQueryFriendInfoCacheReq.FromUid = submit;
            m_SSQueryFriendInfoCacheReq.Uid = target;
            m_SSQueryFriendInfoCacheReq.Reason = reason;
            m_SSQueryFriendInfoCacheReq.OpCallback.SubmitUid = submit;
            m_SSQueryFriendInfoCacheReq.OpCallback.OpType = opType;
            m_SSQueryFriendInfoCacheReq.OpCallback.TargetUid = target;
        }

        // 收到其他friendsvr发来的查询请求
        public static void OnQueryFriendInfoCacheReqFromOtherFriendSvr(uint remoteAppID, StructPacket packet)
        {
            ref SSQueryFriendInfoCacheReq req = ref packet.GetMessage<SSQueryFriendInfoCacheReq>();

            // 这2种情况都是直接发给DB的, 不应该收到其他friendSvr发过来
            if (req.Reason == QueryFriendInfoCacheReason.QueryByCliOp
                || req.Reason == QueryFriendInfoCacheReason.QueryBySsOp)
            {
                TraceLog.Error("FriendCacheSvc.OnQueryFriendInfoCacheReqFromOtherFriendSvr QueryByCliOp must send to DB, uid {0}", req.Uid);
                return;
            }

            // 不是这个服的玩家为什么发过来, 不转发请求, 打日志查下bug
            if (! FriendUtils.IsPlayerBelongThisServer(req.Uid))
            {
                TraceLog.Error("FriendCacheSvc.OnQueryFriendInfoCacheReqFromOtherFriendSvr uid {0} not belong this svr",
                    req.Uid);
                return;
            }

            ref FriendCacheInfoStruct cacheInfo = ref FriendOp.GetFriendInfoByUid(req.Uid);
            if (cacheInfo.IsNull())
            {
                TraceLog.Trace("FriendCacheSvc.OnQueryFriendInfoCacheReqFromOtherFriendSvr uid {0} FriendCacheInfo not cache"
                    , req.Uid);
                SendDBQueryFriendInfoCache(req.Uid, req.FromUid, req.Reason);
                return;
            }

            m_SSQueryFriendInfoCacheRes.Uid = req.Uid;
            m_SSQueryFriendInfoCacheRes.FromUid = req.FromUid;
            m_SSQueryFriendInfoCacheRes.Reason = req.Reason;
            m_SSQueryFriendInfoCacheRes.OpCallback = req.OpCallback;
            m_SSQueryFriendInfoCacheRes.List.Clear();
            m_SSQueryFriendInfoCacheRes.OpData.Clear();
            m_SSQueryFriendInfoCacheRes.Self = cacheInfo.Self;

            FriendServerUtils.GetPacketSender().SendToServerByID(remoteAppID,
                (int)SSGameMsgID.QueryFriendInfoCacheRes, ref m_SSQueryFriendInfoCacheRes, req.Uid);
        }

        public static void OnQueryFriendInfoCacheResFromDB(uint remoteAppID, StructPacket packet)
        {
            ref SSQueryFriendInfoCacheRes res = ref packet.GetMessage<SSQueryFriendInfoCacheRes>();
            TraceLog.Trace("FriendCacheSvc.OnQueryFriendInfoCacheResFromDB uid {0} fromUid {1} reason {2} DB.Uid {3}"
                , res.Uid, res.FromUid, res.Reason, res.Self.Uid);

            if (res.Self.Uid != 0)
            {
                if (FriendUtils.IsPlayerBelongThisServer(res.Self.Uid))
                {
                    // 取最新的在线状态
                    //res.Self.IsOnline = FriendServerUtils.GetFriendServerData().m_playerOnline.Contains(res.Self.Uid);

                    ref FriendCacheInfoStruct info = ref FriendOp.GetFriendInfoByUid(res.Uid);
                    if (info.IsNull())
                    {
                        FriendOp.AddFriendCacheInfoStruct(ref res.Self, ref res.List, ref res.OpData);
                    }
                }
                else
                {
                    FriendOp.AddOrUpdateRemoteFriendOne(ref res.Self);
                }
            }

            //登录拉取好友列表里的玩家的数据
            if (res.Reason == QueryFriendInfoCacheReason.LoginQuerySnsFriend
                || res.Reason == QueryFriendInfoCacheReason.LoginQueryDBFriend
                || res.Reason == QueryFriendInfoCacheReason.QueryFriendOneStruct
                || res.Reason == QueryFriendInfoCacheReason.QueryBlacklist)
            {
                FriendSnsSvc.OnQueryFriendInfoCacheResFromDB(ref res);
                return;
            }

            // 操作双方同服
            if (res.Reason == QueryFriendInfoCacheReason.QueryByCliOp)
            {
                FriendOpSvc.DoFriendOpOnBothDataLoad(ref res);
                return;
            }

            // 操作双方不同服, 处理target后通知另一个friendsvr处理submit
            if (res.Reason == QueryFriendInfoCacheReason.QueryBySsOp)
            {
                FriendOpSvc.DoFriendOpTargetSideFirst(ref res);
                return;
            }

            // 赠送
            if (res.Reason == QueryFriendInfoCacheReason.QueryBySendGift)
            {
                FriendSvc.DoFriendSendGiftOnDataLoad(res.Uid, res.FromUid);
                return;
            }

            // 写入私聊
            if (res.Reason == QueryFriendInfoCacheReason.SaveChat && res.Self.Uid != 0)
            {
                ChatSvc.SavePrivateChatOnDBRes(ref res.ChatRes);
                return;
            }

            // 拉取私聊
            if (res.Reason == QueryFriendInfoCacheReason.QueryChat && res.Self.Uid != 0)
            {
                ChatSvc.OnQueryChatDataResFromDB(res.Uid, res.ChatSeq);
				return;
            }

            // 根据uid查询玩家信息
            if (res.Reason == QueryFriendInfoCacheReason.QueryByUid)
            {
                FriendRecommenderSvc.OnQueryFriendInfoCacheResFromDB(ref res);
                return;
            }
        }

        //收到其他FriendSvr通知friendUid更新好友列表中selfUid的基本信息
        public static void OnFriendSelfChgFromOtherSvr(uint remoteAppID, StructPacket packet)
        {
            ref SSFriendSelfChgNotify notify = ref packet.GetMessage<SSFriendSelfChgNotify>();
            TraceLog.Trace("FriendCacheSvc.OnFriendSelfChgFromOtherSvr selfUid {0}", notify.Self.Uid);

            // 当前服务器管理的玩家却收到其他服务器发来的通知
            if (FriendUtils.IsPlayerBelongThisServer(notify.Self.Uid))
            {
                TraceLog.Error("FriendCacheSvc.OnFriendSelfChgFromOtherSvr uid {0} must in this svr", notify.Self.Uid);
                return;
            }

            // 更新缓存池中的数据, 缓存池中有才更新, 没有说明暂时不需要该玩家数据, 不用新增, 降低内存占用
            ref RemoteFriendOneStruct remoteFriend = ref FriendOp.GetRemoteFriendOneByUid(notify.Self.Uid);
            if (! remoteFriend.IsNull())
            {
                FriendUtils.CopySelfToRemoteFriend(ref notify.Self, ref remoteFriend);
            }
        }

        public static ref DBFriendOneStruct UpdateFriendInfoToInFriendList(
            ref FriendCacheInfoStruct friendCache, ref DBFriendSelf self)
        {
            for (int i = 0; i < friendCache.FriendList.iCount; i++)
            {
                ref DBFriendOneStruct one = ref FriendOp.GetFriendOneByIndex(ref friendCache, i);
                if (one.oneFriend.Uid == self.Uid)
                {
                    FriendOp.UpdateSelfInfoTOFriendOne(ref self, ref one);
                    return ref one;
                }
            }

            return ref FriendInfoCache.m_cacheStructFriendOne.GetByIndex(0);
        }
    }
}