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

using Sog;
using ProtoCSStruct;

namespace Friend
{
    //Facebook好友处理逻辑
    public static class FriendSnsSvc
    {
        /// <summary>
        /// 向account服务器发送查询sns好友信息列表的请求
        /// 这个请通过world转，或者通过httpproxyworld查询也可以，以后再说
        /// </summary>
        /// <param name="player"></param>
        public static void SendAccountQuerySnsFriendList(PlayerInfoFriend player)
        {
            SSQuerySnsFriendAccountReq req = new SSQuerySnsFriendAccountReq();
            req.Uid = player.UserID;
            req.AccountType = player.accountInfo.AccountType;
            req.AccountID = player.accountInfo.AccountID;
            //FriendServerUtils.GetPacketSender().SendToAccountServer((int)SSMsgID.QuerySnsFriendAccountReq, req, player.UserID);
        }

        public static void OnQuerySnsFriendAccountRes(uint remoteAppID, StructPacket packet)
        {
            ref SSQuerySnsFriendAccountRes res = ref packet.GetMessage<SSQuerySnsFriendAccountRes>();

            PlayerInfoFriend player = FriendServerUtils.GetPlayerTableOp().GetPlayerInfo(res.Uid);
            if (player == null)
            {
                TraceLog.Error("FriendSnsSvc.QuerySnsFriendAccountRes can not find player uid {0}", res.Uid);
                return;
            }

            player.SnsFriendList.Clear();

            // todo 拉取到的sns好友是登录过游戏的?

            OnAccountSnsFriendQueryFinish(player);
        }

        private static bool IsInMySnsFriendList(PlayerInfoFriend player, long friendUid)
        {
            foreach(var snsFriend in player.SnsFriendList)
            {
                if(snsFriend.Uid == friendUid)
                {
                    return true;
                }
            }

            return false;
        }

        /// <summary>
        /// account回应sns好友列表成功，处理自己的sns好友和游戏好友从数据库里拉取信息
        /// 同步sns好db好友信息，比如好友类型，从sns好友变成游戏好友或者从游戏好友变成sns好友
        /// </summary>
        /// <param name="player"></param>
        public static unsafe void OnAccountSnsFriendQueryFinish(PlayerInfoFriend player)
        {
            TraceLog.Trace("FriendSnsSvc.OnAccountSnsFriendQueryFinish uid {0}", player.UserID);

            ref FriendCacheInfoStruct info = ref FriendOp.GetFriendInfoByUid(player.UserID);
            if (info.IsNull())
            {
                TraceLog.Error("FriendSnsSvc.OnAccountSnsFriendQueryFinish can not find player uid {0} friendInfo from cache"
                    , player.UserID);
                return;
            }

            //遍历所有好友列表，从cache里更新最新数据，如果cache里没有，需要去数据库里查(sns qq 微信的好友暂时不处理)
            FriendSvc.CheckFriendListStruct(ref info);

            FriendSvc.CheckPlayerFriendDataSynFromDBFinishAckGame(player.UserID);
        }

        public static void OnQueryFriendInfoCacheResFromDB(ref SSQueryFriendInfoCacheRes res)
        {
            if (! FriendUtils.IsPlayerBelongThisServer(res.FromUid))
            {
                FriendServerUtils.GetPacketSender().SendToFriendServer((int) SSGameMsgID.QueryFriendInfoCacheRes, ref res, res.FromUid);
                return;
            }

            PlayerInfoFriend player = FriendServerUtils.GetPlayerTableOp().GetPlayerInfo(res.FromUid);
            if (player == null)
            {
                TraceLog.Error("FriendSnsSvc.OnQueryFriendInfoCacheResFromDB can not find player uid {0}"
                    , res.FromUid);
                return;
            }

            //先统一处理sns列表
            if (res.Reason == QueryFriendInfoCacheReason.LoginQuerySnsFriend)
            {
                //标记sns好友数据
                foreach (var snsFriend in player.SnsFriendList)
                {
                    if (snsFriend.Uid == res.Uid)
                    {
                        if (res.Self.Uid == 0)
                        {
                            // snsFriend.DbQueryResult = -1;
                        }
                        else
                        {
                            //snsFriend.DbQueryResult = 1;
                        }
                        break;
                    }
                }
            }

            // 好友的DBFriendSelf
            if (res.Self.Uid == 0)
            {
                //这种情况按理说是不可能发生的
                if (res.Reason != QueryFriendInfoCacheReason.LoginQuerySnsFriend)
                {
                    TraceLog.Error("FriendSnsSvc.OnQueryFriendInfoCacheResFromDB uid {0} fromuid {1} forSns == false, but not friend data in db, logic error!"
                        , res.Uid, res.FromUid);
                }

                // LoginQuerySnsFriend，发起查询的sns好友肯定是有uid的，有uid但是没有tbfriend信息
                // 目前只有一种情况，建立了account后没有login游戏，有uid没有roleData，也就没有tbfriend

                // LoginQueryDbfriend，对方在自己的好友列表里面，但是对方的好友信息不存在？
                // A、B成为好友后，A数据落地成功，B数据落地失败，停服没成功？没问题，游戏好友手动再加一次，sns好友下次上线自己添加
          
                //facebook好友里有，但是游戏数据库里没有,情况1，数据库会删除重建，情况2，建立了account但是没有建立游戏帐号，也正常(概率应该不高)
                TraceLog.Trace("FriendSnsSvc.OnQueryFriendInfoCacheResFromDB can not find friendInfo from db uid {0} fromuid {1}"
                    , res.Uid, res.FromUid);
            }
            else
            {
                //sns好友db信息查询成功，那么添加这个好友到我的好友列表
                if (res.Reason == QueryFriendInfoCacheReason.LoginQuerySnsFriend)
                {
                    //添加好友信息到列表
                    ref FriendCacheInfoStruct friendInfo = ref FriendOp.GetFriendInfoByUid(player.UserID);
                    if (friendInfo.IsNull())
                    {
                        TraceLog.Error("FriendSnsSvc.OnQueryFriendInfoCacheResFromDB uid {0} no cache"
                            , res.Uid);
                        return;
                    }

                    if(FriendSvc.CanAddNewToFriendList(friendInfo.Self.Uid, res.Self.Uid))
                    {
                        DBFriendOne newOne = new DBFriendOne();
                        FriendUtils.CopySelfToFriendOne(ref res.Self, ref newOne);
                        newOne.FriendType = 1;

                        // 主动添加自己的sns好友
                        FriendOp.DoAddFriendOneToMySelf(ref friendInfo, newOne.Uid, true);

                        TraceLog.Trace("FriendSnsSvc.OnQueryFriendInfoCacheResFromDB player uid {0} add one friend uid {1}"
                            , player.UserID, newOne.Uid);
                    }
                    else
                    {
                        if (FriendSvc.IsFriendListFull(ref friendInfo))
                        {
                            TraceLog.Error("FriendSnsSvc.OnQueryFriendInfoCacheResFromDB player uid {0} friend list full"
                                , player.UserID);
                        }
                    }
                }              
            }
            if(res.Reason == QueryFriendInfoCacheReason.QueryBlacklist)
            {
                FriendSvc.CheckPlayerBlacklistSynFromDBFinishAckGame(res.FromUid);
                return;
            }
            FriendSvc.CheckPlayerFriendDataSynFromDBFinishAckGame(res.FromUid);
        }
    }
}