using Google.Protobuf;


using ServerCore;
using ServerBase;
using ServerCommon;

using static ClientToGameReq.Types;
using static ClientToGameRes.Types;



namespace GameServer.PacketHandler;

[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.ChatReq), typeof(ChatPacketHandler), typeof(GameLoginListener))]
public class ChatPacketHandler : PacketRecvHandler
{
    public static bool send_S2C_ACK_CHAT(Player player, Result result, string receiver_nickname, ChatType chat_type = ChatType.None, string sender_nickname = "", string receiver_guid = "", PlayerStateType receiver_state = PlayerStateType.None, string message = "")
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

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

        ack_packet.Response.ChatRes.Type = chat_type;
        ack_packet.Response.ChatRes.Sender = sender_nickname;
        ack_packet.Response.ChatRes.Receiver = receiver_nickname;
        ack_packet.Response.ChatRes.Receiverid = receiver_guid;
        ack_packet.Response.ChatRes.Receiverstate = receiver_state;
        ack_packet.Response.ChatRes.Message = message;

        if (false == GameServerApp.getServerLogic().onSendPacket(player, ack_packet))
        {
            return false;
        }

        return true;
    }

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

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

        var server_logic = GameServerApp.getServerLogic();

        var chat_action = entity_player.getEntityAction<ChatAction>();
        NullReferenceCheckHelper.throwIfNull(chat_action, () => $"chat_action is null !!!");

        // 1. 메시지 체크
        var game_msg = recvMessage as ClientToGame;
        if (game_msg == null)
        {
            err_msg = $"Failed to cast ClientToGame !!! : {nameof(ClientToGame.Request.ChatReq)}";
            result.setFail(ServerErrorCode.ClassTypeCastIsNull, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_CHAT(entity_player, result, "");
            return result;
        }

        var request = game_msg.Request.ChatReq;
        
        // 2. 유저 block 체크
        var account_attribute = entity_player.getEntityAttribute<AccountAttribute>();
        NullReferenceCheckHelper.throwIfNull(account_attribute, () => $"account_attribute is null !!! - {entity_player.toBasicString()}");
        var account_base_doc = account_attribute.getOriginDocBase<AccountAttribute>() as AccountBaseDoc;
        NullReferenceCheckHelper.throwIfNull(account_base_doc, () => $"account_base_doc is null !!!");

        var doc_account_base_attrib = account_base_doc.getAttrib<AccountBaseAttrib>();
        NullReferenceCheckHelper.throwIfNull(doc_account_base_attrib, () => $"doc_account_base_attrib is null !!!");

        var block_policy = UserBlockHelper.convertBlockPolicyToJavaPolicy(doc_account_base_attrib.BlockPolicy);
        if (block_policy.Contains(UserBlockPolicyType.ChattingRestrictions.ToString()))
        {
            //여기서 강제로 리턴
            send_S2C_ACK_CHAT(entity_player, result, request.ToNickName);
            return result;
        }

        // 3. cheat 체크
        if (server_logic.ChatCommand.isCheatCommand(request.Message) == true)
        {
            await server_logic.ChatCommand.HandleCommand(entity_player, request.Message);
            send_S2C_ACK_CHAT(entity_player, result, request.ToNickName);
            return result;
        }

        // 4. chat 기본 조건 체크
        result = checkChatConditions(request.Message);
        if (result.isFail())
        {
            send_S2C_ACK_CHAT(entity_player, result, request.ToNickName);
            return result;
        }
        
        var chat_type = request.Type;

        // 5. 채팅 처리
        switch (chat_type)
        {
            case ChatType.Normal:
                result = chat_action.NormalChat(request.Message);
                break;
            case ChatType.Channel:
                result = chat_action.ChannelChat(request.Message);
                break;
            case ChatType.Notice:
                result = chat_action.NoticeChat(request.Message);
                break;
            case ChatType.Whisper:
                result = await chat_action.WhisperChat(request.ToNickName, request.Message);
                break;
            case ChatType.Party:
                result = await chat_action.PartyChat(request.Message);
                break;
            default:
                err_msg = $"Invalid EChatType !!! EChatType : {request.Type} - {entity_player.toBasicString()}";
                result.setFail(ServerErrorCode.ChatInvalidChatType, err_msg);
                Log.getLogger().error(err_msg);
                break;
        }

        if (result.isFail())
        {
            err_msg = $"Failed to trySendMail() !!! : {result.toBasicString()} - {entity_player.toBasicString()}";
            Log.getLogger().error(err_msg);
            return result;
        }

        await QuestManager.It.QuestCheck(entity_player, new QuestChat(EQuestEventTargetType.CHAT, EQuestEventNameType.USED, chat_type.ToString(), request.Message));

        return result;
    }

    private Result checkChatConditions(string message)
    {
        var result = new Result();
        string err_msg;
        
        // 1. 총 길이 체크
        if (message.Length > MetaHelper.GameConfigMeta.ChatStringInputMax)
        {
            err_msg = $"fail to send chat !!! : invalid chat message length - {message.Length}";
            result.setFail(ServerErrorCode.ChatInvalidMessageLength, err_msg);
            Log.getLogger().error(err_msg);
            return result;
        }

        // 2. 금칙어 체크 ( Client 에서 처리함 )
        /*if (ServerUtil.isBanWorld(message, false))
        {
            err_msg = $"fail to send chat !!! : include ban word - {message}";
            result.setFail(ServerErrorCode.ChatIncludeBanWord, err_msg);
            Log.getLogger().error(err_msg);
            return result;
        }*/
        
        return result;
    }

    public override async Task onProcessPacketException(ISession entityWithSession, IMessage recvMessage
                               , Result errorResult)
    {
        await Task.CompletedTask;

        var player = entityWithSession as Player;
        NullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!! - {entityWithSession.toBasicString()}");
        var recv_msg = recvMessage as ClientToGame;
        NullReferenceCheckHelper.throwIfNull(recv_msg, () => $"recv_msg is null !!! - {player.toBasicString()}");
        var request = recv_msg.Request.ChatReq;
        NullReferenceCheckHelper.throwIfNull(request, () => $"request is null !!! - {player.toBasicString()}");

        send_S2C_ACK_CHAT(player, errorResult, request.ToNickName);
    }
}