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.InvitePartyReq), typeof(InvitePartyPacketHandler), typeof(GameLoginListener))]
public class InvitePartyPacketHandler : PacketRecvHandler
{
    private static void send_S2C_ACK_INVITE_PARTY(Player owner, Result result, Dictionary<(USER_GUID? userGuid, string? nickname), ServerErrorCode>? errInvites)
    {
        var ack_packet = new ClientToGame
        {
            Response = new ClientToGameRes
            {
                ErrorCode = result.ErrorCode,
                InvitePartyRes = new()
            }
        };

        if (result.isSuccess())
        {
            foreach (var err_member in errInvites ?? new())
            {
                var invite_err = new InvitePartyErrorMember
                {
                    ErrorCode = err_member.Value,
                    InviteUserGuid = err_member.Key.userGuid ?? USER_GUID.Empty,
                    InviteUserNickname = err_member.Key.nickname ?? string.Empty
                };
                
                ack_packet.Response.InvitePartyRes.ErrorMemberList.Add(invite_err);
            }
        }
        
        GameServerApp.getServerLogic().onSendPacket(owner, ack_packet);
    }

    public override async Task<Result> onProcessPacket(ISession entityWithSession, IMessage recvMessage)
    {
        var player = entityWithSession as Player;
        NullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!!");

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

        var result = new Result();
        var err_msg = string.Empty;

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

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

        var character_action = selected_character.getEntityAction<CharacterAction>();
        NullReferenceCheckHelper.throwIfNull(character_action, () => $"character_action is null !!! - {selected_character.toBasicString()}");
        if (character_action.isFarming())
        {
            err_msg = $"Character is Farming !!! - {selected_character.toBasicString()}, {player.toBasicString()}";
            result.setFail(ServerErrorCode.FarimgState, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_INVITE_PARTY(player, result, null);
            return result;
        }

        var err_invites = new Dictionary<(USER_GUID? userGuid, string? nickname), ServerErrorCode>();
                
        // 1. 초대하는 User 리스트 획득
        var request_invite_infos = await getInviteUserInfos(request);
        NullReferenceCheckHelper.throwIfNull(request_invite_infos, () => $"request_invite_infos is null !!! - {player.toBasicString()}");

        var invite_users = new List<string>();
        foreach (var info in request_invite_infos)
        {
            if (info.Value == false)
            {
                var err = ServerErrorCode.Success;

                if (info.Key.nickname == null) err = ServerErrorCode.NotFoundNickName;
                if (info.Key.userGuid == null) err = ServerErrorCode.NotFoundUser;

                err_invites.Add((info.Key.userGuid, info.Key.nickname), err);
                continue;
            }

            if (null == info.Key.userGuid) continue;
            if (info.Key.userGuid == player.getUserGuid()) continue;

            invite_users.Add(info.Key.userGuid);
        }

        if (invite_users.Count <= 0)
        {
            err_msg = $"Failed to invite party !!! : invite user is zero!!";
            result.setFail(ServerErrorCode.InvitePartyInvalidUsers, err_msg);
            Log.getLogger().error(err_msg);

            send_S2C_ACK_INVITE_PARTY(player, result, null);
            return result;
        }
        
        // 2. 파티가 없으면 생성하기
        var personal_party_action = player.getEntityAction<PersonalPartyAction>();
        var party = personal_party_action.getPersonalParty();
        var is_create = false;
        if (null == party)
        {
            result = await personal_party_action.createDefaultParty();
            if (result.isFail())
            {
                send_S2C_ACK_INVITE_PARTY(player, result, null);
                return result;
            }

            party = personal_party_action.getPersonalParty();
            is_create = true;
        }

        NullReferenceCheckHelper.throwIfNull(party, () => $"party is null !!");

        // 4. 파티 초대
        var party_invite_action = party.getEntityAction<PartyInviteAction>();
        if (null == party_invite_action)
        {
            err_msg = $"Failed to get entity action !!! : {nameof(PartyInviteAction)}";
            result.setFail(ServerErrorCode.EntityActionNotFound, err_msg);
            Log.getLogger().error(err_msg);

            send_S2C_ACK_INVITE_PARTY(player, result, null);
            return result;
        }
        
        var invite_party = await party_invite_action.inviteParty(invite_users);
        

        // 5. 에러 유저 정리
        foreach (var invite_result in invite_party.err_invites ?? new())
        {
            var nickname = string.Empty;
            foreach (var user in request_invite_infos.Where(user => user.Key.userGuid == invite_result.Key))
            {
                nickname = user.Key.nickname;
                break;
            }

            err_invites.Add((invite_result.Key, nickname), invite_result.Value);
        }
        
        // 6. 데이터 정리
        if (is_create && (invite_party.result.isFail() || request.InviteUserGuids.Count + request.InviteUserNicknames.Count == err_invites.Count))
        {
            await personal_party_action.clearPersonalParty();
        }
        
        // 7. 결과 전송
        send_S2C_ACK_INVITE_PARTY(player, invite_party.result, err_invites);
        
        // 8. Business Log 기록
        if (invite_party.result.isSuccess())
        {
            writeBusinessLog(player, is_create, party.getPartyGuid(), invite_users);   
        }
        
        return result;
    }

    private async Task<Dictionary<(USER_GUID? userGuid, string? nickname), bool>> getInviteUserInfos(ClientToGameReq.Types.InvitePartyReq request)
    {
        var infos = new Dictionary<(USER_GUID?, string?), bool>();
        
        // 1. nickname 으로 guid 획득
        foreach (var nickname in request.InviteUserNicknames)
        {
            var find = await NicknameHelper.findNickname(nickname);
            if (find.Item1.isFail() || null == find.Item2)
            {
                infos.Add((null, nickname), false);
                continue;
            }

            infos.Add((find.Item2.UserGuid, nickname), true);
        }
        
        // 2. guid 로 nickname 획득
        foreach (var guid in request.InviteUserGuids)
        {
            var nickname = await PartyHelper.getUserNicknameFromGuid(guid);
            if (null == nickname)
            {
                infos.Add((guid, null), false);
                continue;
            }

            infos.Add((guid, nickname), true);
        }

        return infos;
    }

    private void writeBusinessLog(Player player, bool isCreate, string partyGuid, List<string> inviteUsers)
    {
        var party_log_data = PartyBusinessLogHelper.toPartyLogData(partyGuid, isCreate);
        
        // 1. 파티 생성 기록
        PartyBusinessLog party_business_log;
        
        if (isCreate)
        {
            party_business_log = new PartyBusinessLog(new LogActionEx(LogActionType.CreateParty), party_log_data);
            BusinessLogger.collectLog(player, party_business_log);
        }
        
        // 2. 파티 초대 기록
        var invite_logs = new List<ILogInvoker>();
        foreach (var invite in inviteUsers)
        {
            var log_data = PartyBusinessLogHelper.toPartyMemberLogData(partyGuid, invite, PartyMemberActionType.Invite);
            var party_member_business_log = new PartyMemberBusinessLog(log_data);
            invite_logs.Add(party_member_business_log);
        }

        party_business_log = new PartyBusinessLog(party_log_data);
        invite_logs.Add(party_business_log);
        
        BusinessLogger.collectLogs(new LogActionEx(LogActionType.InviteParty), player, invite_logs);
    }
}