using Google.Protobuf;
using Google.Protobuf.WellKnownTypes;


using ServerCore;
using ServerBase;
using ServerCommon;
using ServerCommon.BusinessLogDomain;
using MetaAssets;


using USER_GUID = System.String;


namespace GameServer.PacketHandler;


[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.SummonPartyMemberReq), typeof(SummonPartyMemberPacketHandler), typeof(GameLoginListener))]
public class SummonPartyMemberPacketHandler : PacketRecvHandler
{
    private static void send_S2C_ACK_SUMMON_PARTY_MEMBER(Player owner, Result result, Item? spentItem)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new();
        ack_packet.Response.ErrorCode = result.ErrorCode;
        ack_packet.Response.SummonPartyMemberRes = new();
        
        if (result.isSuccess())
        {
            NullReferenceCheckHelper.throwIfNull(spentItem, () => $"spentItem is null !!! - {owner.toBasicString()}");

            var delete = spentItem.toItemData4Client();
            
            var item = new ItemGuidCount();
            item.ItemGuid = delete.ItemGuid;
            item.ItemCount = delete.Count;
            ack_packet.Response.SummonPartyMemberRes.Items.Add(item);   
        }

        GameServerApp.getServerLogic().onSendPacket(owner, ack_packet);
    }

    public override async Task<Result> onProcessPacket(ISession entityWithSession, IMessage recvMessage)
    {
        var player = entityWithSession as Player;
        ArgumentNullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!!");
        var game_msg = recvMessage as ClientToGame;
        ArgumentNullReferenceCheckHelper.throwIfNull(game_msg, () => $"game_msg is null !!! - {player.toBasicString()}");
        var request = game_msg.Request.SummonPartyMemberReq;
        ArgumentNullReferenceCheckHelper.throwIfNull(request, () => $"request is null !!! - {player.toBasicString()}");

        var result = new Result();
        string err_msg;

        var player_action = player.getEntityAction<PlayerAction>();
        NullReferenceCheckHelper.throwIfNull(player_action, () => $"player_action is null !!! - {player.toBasicString()}");

        // 1. 캐릭터 선택 상태 체크
        var selected_character = player_action.getSelectedCharacter();
        if (null == selected_character)
        {
            err_msg = $"Not selected Character !!! - {player.toBasicString()}";
            result.setFail(ServerErrorCode.CharacterNotSelected, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_SUMMON_PARTY_MEMBER(player, result, null);
            return result;
        }

        // 2. 소속 파티 Guid 조회
        var personal_party_action = player.getEntityAction<PersonalPartyAction>();
        NullReferenceCheckHelper.throwIfNull(personal_party_action, () => $"personal_party_action is null !!! - {player.toBasicString()}");

        var personal_party = personal_party_action.getPersonalParty();
        if (null == personal_party)
        {
            err_msg = $"Failed to get party info !!! - not party member - {player.getUserGuid()}";
            result.setFail(ServerErrorCode.NotParty, err_msg);
            Log.getLogger().error(err_msg);

            send_S2C_ACK_SUMMON_PARTY_MEMBER(player, result, null);
            return result;
        }

        var global_party = GameServerApp.getServerLogic().findGlobalEntity<GlobalParty>();
        NullReferenceCheckHelper.throwIfNull(global_party, () => $"global_party is null !!! - {player.toBasicString()}");

        var party = global_party.getParty(personal_party.getPartyGuid());
        NullReferenceCheckHelper.throwIfNull(party, () => $"party is null !!! - {player.toBasicString()}");

        // 3. 파티장 체크
        var party_action = party.getEntityAction<GlobalPartyDetailAction>();
        NullReferenceCheckHelper.throwIfNull(party_action, () => $"party_action is null !!! - {player.toBasicString()}");

        var is_leader = party_action.isLeader(player.getUserGuid());
        if (false == is_leader)
        {
            err_msg = $"Failed to summon party member !!! : not party leader - {player.getUserGuid()}";
            result.setFail(ServerErrorCode.NotPartyLeader, err_msg);
            Log.getLogger().error(err_msg);

            send_S2C_ACK_SUMMON_PARTY_MEMBER(player, result, null);
            return result;
        }

        // 4. 파티원 체크
        var party_member_action = party.getEntityAction<GlobalPartyDetailMemberAction>();
        NullReferenceCheckHelper.throwIfNull(party_member_action, () => $"party_member_action is null !!! - {player.toBasicString()}");

        var is_member = party_member_action.isPartyMember(request.PartyMemberUserGuid);
        if (false == is_member)
        {
            err_msg = $"Failed to summon party member !!! : not party member - {request.PartyMemberUserGuid}";
            result.setFail(ServerErrorCode.NotPartyMember, err_msg);
            Log.getLogger().error(err_msg);

            send_S2C_ACK_SUMMON_PARTY_MEMBER(player, result, null);
            return result;
        }

        // 5. 소환 조건 체크
        result = await checkSummonConditionAsync(player, request.PartyMemberUserGuid, party);
        if (result.isFail())
        {
            send_S2C_ACK_SUMMON_PARTY_MEMBER(player, result, null);
            return result;
        }
        
        // 6. 소환 처리
        result = await player.runTransactionRunnerSafely( TransactionIdType.PrivateContents, "SummonPartyMember"
                                                        , summonDelegate );
        if (result.isFail())
        {
            _ = await party_member_action.clearSummonMemberAsync(request.PartyMemberUserGuid, false);

            send_S2C_ACK_SUMMON_PARTY_MEMBER(player, result, null);
            return result;
        }
        
        return result;

        async Task<Result> summonDelegate() => await summonAsync(player, request.PartyMemberUserGuid, party);
    }

    private async Task<Result> checkSummonConditionAsync(Player player, USER_GUID summonUserGuid, GlobalPartyDetail party)
    {
        var result = new Result();
        string err_msg;

        var server_logic = GameServerApp.getServerLogic();
        
        var party_member_action = party.getEntityAction<GlobalPartyDetailMemberAction>();
        NullReferenceCheckHelper.throwIfNull(party_member_action, () => $"party_member_action is null !!! - {player.toBasicString()}");

        var summon_members = party_member_action.getSummonMembers();
        var proud_net_listener = server_logic.getProudNetListener();

        // 1. base 체크
        var curr_user_count = proud_net_listener.getEntityWithSessions().Count +
                              server_logic.getReservationManager().getReservedUserCount() +
                              server_logic.getReturnManager().getReturnUserCount() +
                              UgcNpcCountManager.Instance.calculateNpcCount();
        if (proud_net_listener.getMaxConnectionCount() <= curr_user_count)
        {
            err_msg = $"Failed to summon party member !!! : not channel server - {curr_user_count}";
            result.setFail(ServerErrorCode.PartyLeaderServerIsFull, err_msg);
            Log.getLogger().error(err_msg);

            return result;
        }
        
        // 2. leader condition 체크
        result = await checkLeaderConditions(player, summon_members.Count());
        if (result.isFail()) return result;
        
        // 3. summon user condition 체크
        result = await checkSummonUserConditions(player, summon_members.ToList(), summonUserGuid);
        if (result.isFail()) return result;

        return result;
    }

    private async Task<Result> checkLeaderConditions(Player player, int summonMemberCount)
    {
        await Task.CompletedTask;
        
        var server_logic = GameServerApp.getServerLogic();
        
        var result = new Result();
        string err_msg;
        
        // 1. leader 가 channel 인지 체크
        if (server_logic.getServerType().toServerType() != ServerType.Channel)
        {
            err_msg = $"Failed to summon party member !!! : not channel server - {GameServerApp.getServerLogic().getServerType().toServerType()}";
            result.setFail(ServerErrorCode.InvalidSummonServerType, err_msg);
            Log.getLogger().error(err_msg);

            return result;
        }
        
        // 2. 소환 불가 위치 체크 
        // todo (sangyeob.kim) : client 에서 체크 중 -> 서버체크는 필요시 추가 ( 현재는 notifyReply 로 한다. )

        // 3. 소환석 아이템 수량 체크
        var inventory_action = player.getEntityAction<InventoryActionBase>();
        NullReferenceCheckHelper.throwIfNull(inventory_action, () => $"inventory_action is null !!! - {player.toBasicString()}");

        var summon_item_count = inventory_action.getItemCountAllByMetaId((uint)MetaHelper.GameConfigMeta.SummonStoneItemMetaId);
        if (summon_item_count < summonMemberCount + 1)
        {
            err_msg = $"Failed to summon party member !!! : insufficient summon item - summon_item_count[{summon_item_count}] / summon_count[{summonMemberCount}]";
            result.setFail(ServerErrorCode.ItemCountNotEnough, err_msg);
            Log.getLogger().error(err_msg);
        }
        
        return result;
    }

    private async Task<Result> checkSummonUserConditions(Player player, IReadOnlyList<USER_GUID> summonUsers, USER_GUID summonUserGuid)
    {
        var server_logic = GameServerApp.getServerLogic();
        
        var result = new Result();
        string err_msg;
        
        // 1. 소환 중인 유저 체크
        if (summonUsers.Contains(summonUserGuid))
        {
            err_msg = $"Failed to summon party member !!! : Already summon member - {summonUserGuid}";
            result.setFail(ServerErrorCode.AlreadySummon, err_msg);
            Log.getLogger().error(err_msg);

            return result;
        }

        // 2. 소환 유저 로그인 체크
        var login_cache = await PartyHelper.getOtherUserLoginCache(summonUserGuid);
        if (null == login_cache)
        {
            err_msg = $"Failed to summon party member !!! : summon user logged out - {summonUserGuid}";
            result.setFail(ServerErrorCode.LogOffTarget, err_msg);
            Log.getLogger().error(err_msg);
            return result;
        }
        
        // 3. 동일 월드 체크
        (result, var summon_user_server_info) = await server_logic.getServerInfoByServerName(login_cache.CurrentServer);
        NullReferenceCheckHelper.throwIfNull(summon_user_server_info, () => $"summon_user_server_info is null !!! - {player.toBasicString()}");

        if (summon_user_server_info.WorldId != server_logic.getWorldId())
        {
            err_msg = $"Failed to summon party member !!! : invalid world id - leader[{server_logic.getWorldId()}] summon[{summon_user_server_info.WorldId}]";
            result.setFail(ServerErrorCode.InvalidSummonWorldServer, err_msg);
            Log.getLogger().error(err_msg);
            return result;
        }
        
        // 4. 소환 파티원 위치 체크
        var player_manager = server_logic.getPlayerManager(); 
        if (player_manager.tryGetUserByPrimaryKey(summonUserGuid, out var summon_user))
        {
            if(null == summon_user)
            {
                err_msg = $"Failed to summon party member !!! : summon user logged out - {summonUserGuid}";
                result.setFail(ServerErrorCode.LogOffTarget, err_msg);
                Log.getLogger().error(err_msg);
                return result;
            }

            var leader_location_action = player.getEntityAction<LocationAction>();
            NullReferenceCheckHelper.throwIfNull(leader_location_action, () => $"leader_location_action is null !!! - {player.toBasicString()}");

            var leader_curr_pos = leader_location_action.getCurrentPos();

            var summon_user_location_action = summon_user.getEntityAction<LocationAction>();
            NullReferenceCheckHelper.throwIfNull(summon_user_location_action, () => $"summon_user_location_action is null !!! : {summon_user.toBasicString()} - {player.toBasicString()}");

            var summon_user_location = summon_user_location_action.getCurrentPos();

            var distance = PartyHelper.calculateDistance(leader_curr_pos, summon_user_location);
            if (distance <= ServerCommon.Constant.PARTY_SUMMON_LIMIT_DISTANCE)
            {
                err_msg = $"Failed to summon party member !!! : summon user is short distance - {distance}";
                result.setFail(ServerErrorCode.SummonUserLimitDistance, err_msg);
                Log.getLogger().error(err_msg);

                return result;
            }
        }

        return result;
    }
    
    private async Task<Result> summonAsync(Player leader, string summon_user_guid, GlobalPartyDetail party)
    {
        var leader_location = leader.getEntityAction<LocationAction>()?.getCurrentPos();
        NullReferenceCheckHelper.throwIfNull(leader_location, () => $"leader_location is null !!! - {leader.toBasicString()}");
        
        // 0. 소환 데이터 생성
        var summon = new SummonInfo();
        summon.IsAlreadySummon = true;
        summon.SummonServer = GameServerApp.getServerLogic().getServerName();
        summon.SummonPos = leader_location;
        
        var party_member_action = party.getEntityAction<GlobalPartyDetailMemberAction>();
        NullReferenceCheckHelper.throwIfNull(party_member_action, () => $"party_member_action is null !!! - {leader.toBasicString()}");

        // 1. 소환 처리
        var summon_result = await party_member_action.summonMemberAsync(summon_user_guid, summon);
        if (summon_result.result.isFail())
        {
            return summon_result.result;
        }

        var batch = new QueryBatchEx<QueryRunnerWithDocument>( leader, LogActionType.SummonParty
            , GameServerApp.getServerLogic().getDynamoDbClient());
        {
            batch.addQuery(new DBQWriteToAttributeAllWithTransactionRunner());
            batch.addQuery(new QueryFinal());
        }
        
        // 2. Business Log 기록
        writeBusinessLog(batch, party.PartyGuid, summon_user_guid);
        
        var result = await QueryHelper.sendQueryAndBusinessLog(batch);
        if (result.isFail()) return result;
        
        send_S2C_ACK_SUMMON_PARTY_MEMBER(leader, result, summon_result.delete_item);

        return result;
    }

    private void writeBusinessLog(QueryBatchBase queryBatch, string partyGuid, string userGuid)
    {
        // 1. 파티 정보
        var party_log_data = PartyBusinessLogHelper.toPartyLogData(partyGuid, false);
        var party_business_log = new PartyBusinessLog(party_log_data);
        queryBatch.appendBusinessLog(party_business_log);
        
        // 2. 파티 멤버 정보
        var party_member_log_data =
            PartyBusinessLogHelper.toPartyMemberLogData(partyGuid, userGuid, PartyMemberActionType.Summon);
        var party_member_business_log = new PartyMemberBusinessLog(party_member_log_data);
        queryBatch.appendBusinessLog(party_member_business_log);
    }
}