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


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


namespace GameServer.PacketHandler;

[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.C2GS_REQ_UGC_NPC_RANK), typeof(GetUgcNpcRankPacketHandler), typeof(GameLoginListener))]
public class GetUgcNpcRankPacketHandler : PacketRecvHandler
{
    public static bool send_GS2C_ACK_UGC_NPC_RANK(Player owner, Result result, UgcNpcRankType rankType, UgcNpcRankState rankState,  List<UgcNpcRank>? ranking)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

        ack_packet.Response.ErrorCode = result.ErrorCode;
        ack_packet.Response.AckUgcNpcRank = new();
        

        if (result.isSuccess())
        {
            ack_packet.Response.AckUgcNpcRank.Type = rankType;
            ack_packet.Response.AckUgcNpcRank.State = rankState;

            ranking ??= new List<UgcNpcRank>();
            ack_packet.Response.AckUgcNpcRank.UgcNpcRank.AddRange(ranking);   
        }
        
        if (false == GameServerApp.getServerLogic().onSendPacket(owner, ack_packet))
        {
            return false;
        }

        return true;
    }

    public override async Task<Result> onProcessPacket(ISession entityWithSession, IMessage recvMessage)
    {
        var result = new Result();
        string err_msg;

        var player = entityWithSession as Player;
        NullReferenceCheckHelper.throwIfNull(player, () => "player is null !!!");

        var server_logic = GameServerApp.getServerLogic();
        
        // 1. 기본 정보 체크
        var request = (recvMessage as ClientToGame)?.Request.ReqUgcNpcRank;
        if (null == request)
        {
            err_msg = $"Failed to get Request !!! : {nameof(ClientToGame.Request.ReqUgcNpcRank)}";
            result.setFail(ServerErrorCode.InvalidArgument, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_GS2C_ACK_UGC_NPC_RANK(player,result, UgcNpcRankType.None, UgcNpcRankState.None, null);
            return result;
        }
        
        var ranking_entity = server_logic.findGlobalEntity<UgcNpcRankEntity>();
        if (null == ranking_entity)
        {
            err_msg = $"Failed to get Request !!! : {nameof(ClientToGame.Request.ReqUgcNpcRank)}";
            result.setFail(ServerErrorCode.UgcNpcRankEntityIsNotFound, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_GS2C_ACK_UGC_NPC_RANK(player,result, request.Type, request.State, null);
            return result;
        }
        
        // 2. request validation 체크
        if (false == checkRequestValidation(request))
        {
            err_msg = $"Failed to get Request !!! : {nameof(ClientToGame.Request.ReqUgcNpcRank)}";
            result.setFail(ServerErrorCode.InvalidArgument, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_GS2C_ACK_UGC_NPC_RANK(player,result, request.Type, request.State, null);
            return result;
        }

        // 3. ranking data 조회
        (Result result, List<UgcNpcRank>? ranks) res_rank = new();
        res_rank.result = result;
        
        switch (request.Type)
        {
            case UgcNpcRankType.Like:
                var like_action = ranking_entity.getEntityAction<UgcNpcLikeRankAction>();
                NullReferenceCheckHelper.throwIfNull(like_action, () => $"UgcNpcLikeRankAction is null !!! - player:{player.toBasicString()}");

                res_rank = await like_action.getRanks(request.State);
                break;
            case UgcNpcRankType.Communication:
                var communication_action = ranking_entity.getEntityAction<UgcNpcCommunicationRankAction>();
                NullReferenceCheckHelper.throwIfNull(communication_action, () => $"UgcNpcCommunicationRankAction is null !!! - player:{player.toBasicString()}");

                res_rank = await communication_action.getRanks(request.State);
                break;
            case UgcNpcRankType.Quest:
                var quest_action = ranking_entity.getEntityAction<UgcNpcQuestRankAction>();
                NullReferenceCheckHelper.throwIfNull(quest_action, () => $"UgcNpcQuestRankAction is null !!! - player:{player.toBasicString()}");

                res_rank = await quest_action.getRanks(request.State);
                break;
        }

        send_GS2C_ACK_UGC_NPC_RANK(player, res_rank.result, request.Type, request.State, res_rank.ranks);
        
        return result;
    }

    private bool checkRequestValidation(ClientToGameReq.Types.C2GS_REQ_UGC_NPC_RANK request)
    {
        // 1. state 체크
        if (request.State == UgcNpcRankState.None) return false;
        
        // 2. type 체크
        if (request.Type == UgcNpcRankType.None) return false;

        return true;
    }
}