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;

public class GlobalPartyDetailInfoAction : EntityActionBase
{
    private readonly PartyCacheRequest m_party_cache_request;
    
    private TaskCompletionSource m_vote_finish_task_source { get; set; } = new();
    
    public GlobalPartyDetailInfoAction(GlobalPartyDetail owner) : base(owner)
    {
        m_party_cache_request =
            new PartyCacheRequest(owner.PartyGuid, GameServerApp.getServerLogic().getRedisConnector());
    }

    public override async Task<Result> onInit() => await Task.FromResult(new Result());

    public override void onClear()
    {
        return;
    }

    public async Task keep()
    {
        await m_party_cache_request.keepPartyCache();
    }
    
    public async Task<Result> loadParty()
    {
        var result = new Result();
        
        var party_attribute = getOwner().getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {getOwner().toBasicString()}");
        
        result = await m_party_cache_request.fetchPartyCache();
        if (result.isFail()) return result;
        
        result = await ServerBase.DataCopyHelper.copyEntityAttributeFromCaches(party_attribute, new List<CacheBase> { m_party_cache_request.getPartyCache()! });
        if (result.isFail())
        {
            Log.getLogger().error(result.toBasicString());
        }
        
        return result;
    }

    public async Task<Result> createParty(USER_GUID leader_guid, string leader_nickname)
    {
        var result = new Result();
        
        var party_attribute = getOwner().getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {getOwner().toBasicString()}");
        
        // 1. cache 생성
        result = await m_party_cache_request.createPartyCache(leader_guid, leader_nickname);
        if (result.isFail()) return result;
        
        // 2. attribute 복사
        result = await ServerBase.DataCopyHelper.copyEntityAttributeFromCaches(party_attribute, new List<CacheBase> { m_party_cache_request.getPartyCache()! });
        if (result.isFail())
        {
            Log.getLogger().error(result.toBasicString());
        }
        
        return result;
    }

    public async Task<Result> deleteParty()
    {
        // 1. cache 제거
        var result = await m_party_cache_request.deletePartyCache();
        if (result.isFail())
        {
            Log.getLogger().error(result.toBasicString());
        }
        
        // 2. attribute 제거
        var party_attribute = getOwner().getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {getOwner().toBasicString()}");
        
        party_attribute.onClear();

        return result;
    }

    public async Task<Result> changePartyLeader(USER_GUID next_leader_guid, bool is_upsert_cache)
    {
        var result = new Result();
       
        // 1. attribute 수정
        var party_attribute = getOwner().getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {getOwner().toBasicString()}");

        party_attribute.PartyLeaderCharGuid = next_leader_guid;

        // 2. cache 수정
        var party_cache = m_party_cache_request.getPartyCache();
        NullReferenceCheckHelper.throwIfNull(party_cache, () => $"Party Cache is null !! - party name:{party_attribute.PartyName}");

        party_cache.PartyLeaderCharGuid = next_leader_guid;
        
        if(is_upsert_cache) result = await m_party_cache_request.upsertPartyCache();
        
        return result;
    }

    public async Task<Result> changePartyName(string new_party_name, bool is_upsert_cache)
    {
        var result = new Result();
        
        // 1. attribute 수정
        var party_attribute = getOwner().getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {getOwner().toBasicString()}");

        party_attribute.PartyName = new_party_name;

        // cache 수정
        var party_cache = m_party_cache_request.getPartyCache();
        NullReferenceCheckHelper.throwIfNull(party_cache, () => $"Party Cache is null !! - party name:{party_attribute.PartyName}");

        party_cache.PartyName = new_party_name;
        
        if(is_upsert_cache) result = await m_party_cache_request.upsertPartyCache();
        
        return result;
    }

    public string getPartyName()
    {
        var party_attribute = getOwner().getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {getOwner().toBasicString()}");

        return party_attribute.PartyName;
    }
    
    public async Task<Result> VoteParty(VoteType vote, USER_GUID voter_guid)
    {
        var result = new Result();
        string err_msg;
        
        var party = getOwner() as GlobalPartyDetail;
        NullReferenceCheckHelper.throwIfNull(party, () => $"global party detail is null !!");
        
        var party_attribute = party.getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {getOwner().toBasicString()}");

        // 1. 진행 중인 Vote 확인
        if (null == party_attribute.PartyVote)
        {
            err_msg = $"Failed to reply party vote !!! - not start party vote - {party.PartyGuid}";
            result.setFail(ServerErrorCode.NoStartPartyVote, err_msg);
            Log.getLogger().error(err_msg);
            
            return result;
        }
        
        // 2. 투표 허용 시간 확인
        var allow_vote_time = DateTime.UtcNow.AddSeconds(-1 * MetaHelper.GameConfigMeta.VoteTimeLimitSec + 5 );
        if (party_attribute.PartyVote.StartVoteTime < allow_vote_time.ToTimestamp())
        {
            err_msg = $"Failed to reply party vote !!! - already passed party vote time - {party.PartyGuid}";
            result.setFail(ServerErrorCode.AlreadyPassPartyVoteTime, err_msg);
            Log.getLogger().error(err_msg);
            
            return result;
        }
        
        // 3. 기 투표 여부 체크
        if (party_attribute.PartyVote.Votes.TryGetValue(voter_guid, out var saved_vote) && saved_vote != VoteType.None)
        {
            err_msg = $"Failed to reply party vote !!! - already reply party vote - {voter_guid}";
            result.setFail(ServerErrorCode.AlreadyReplyPartyVote, err_msg);
            Log.getLogger().error(err_msg);
            
            return result;
        }

        party_attribute.PartyVote.Votes[voter_guid] = vote;

        // 4. 투표 종료 체크 ( party leader 가 있는 서버만 )
        var player_message = GameServerApp.getServerLogic().getPlayerManager();
        if (player_message.tryGetUserByPrimaryKey(party_attribute.PartyLeaderCharGuid, out _))
        {
            var is_finished = party_attribute.PartyVote.Votes.All(voted_type => voted_type.Value != VoteType.None);
            if (is_finished) m_vote_finish_task_source.TrySetResult();
            
            return result;
        }

        var message = new ServerMessage();
        message.ReplyPartyVoteNoti = new();
        message.ReplyPartyVoteNoti.PartyGuid = party.PartyGuid;
        message.ReplyPartyVoteNoti.PartyVoterGuid = voter_guid;
        message.ReplyPartyVoteNoti.Vote = vote;
        
        await PartyHelper.sendToServerByTargetClient(party_attribute.PartyLeaderCharGuid, message);
        
        return result;
    }

    public PartyVoteInfo? getPartyVoteInfo()
    {
        var party = getOwner() as GlobalPartyDetail;
        NullReferenceCheckHelper.throwIfNull(party, () => $"global party detail is null !!");
        
        var party_attribute = party.getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {getOwner().toBasicString()}");

        return party_attribute.PartyVote;
    }
    
    public async Task<(Result result, PartyVoteInfo? vote)> registerPartyVote(string vote_title, Timestamp start_vote_time, bool is_start)
    {
        var result = new Result();
        
        var party = getOwner() as GlobalPartyDetail;
        NullReferenceCheckHelper.throwIfNull(party, () => $"global party detail is null !!");
        
        var party_attribute = party.getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {party.toBasicString()}");

        var party_member_action = party.getEntityAction<GlobalPartyDetailMemberAction>();
        NullReferenceCheckHelper.throwIfNull(party_member_action, () => $"GlobalPartyDetailMemberAction is null !! - {party.toBasicString()}");
        
        // 1. vote condition 체크
        result = await checkVoteCondition(party, vote_title);
        if (result.isFail()) return (result, null);

        // 2. vote 정보 저장 : 시작시점의 유저 리스트 등록 - 추가(제외) / 감소(기권)
        var members = party_member_action.getMembers();
        var vote = new PartyVoteInfo
        {
            VoteTitle = vote_title,
            StartVoteTime = start_vote_time
        };
        foreach (var member in members)
        {
            vote.Votes.Add(member, VoteType.None);
        }
        party_attribute.PartyVote = vote;
        
        // 3. cache 저장
        var cache = m_party_cache_request.getPartyCache();
        NullReferenceCheckHelper.throwIfNull(cache, () => $"Party Cache is null !! - party name:{party_attribute.PartyName} / {party.toBasicString()}");

        cache.LastVoteTime = start_vote_time;
        party_attribute.LastVoteTime = start_vote_time;

        if (is_start)
        {
            result = await m_party_cache_request.upsertPartyCache();
            if (result.isFail())
            {
                party_attribute.PartyVote = null;
                return (result, null);
            }
        
            // 4. Wait Vote Task 실행 ( fire and forget )
            _ = Task.Run(waitPartyVoteFinish);
        }
        
        return (result, vote);
    }
    
    private async Task<Result> checkVoteCondition(GlobalPartyDetail party, string vote_title)
    {
        var result = new Result();
        string err_msg;
        
        var party_attribute = party.getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {party.toBasicString()}");
        
        // 1. vote title 길이 체크
        if (vote_title.Length > MetaHelper.GameConfigMeta.MaxVoteAgendaInput)
        {
            err_msg = $"fail to start party vote !!! : invalid vote title length - {vote_title.Length}";
            result.setFail(ServerErrorCode.InvalidPartyStringLength, err_msg);
            Log.getLogger().error(err_msg);

            return result;
        }
        
        // 2. 진행 중인 Vote 체크 
        if (null != party_attribute.PartyVote)
        {
            err_msg = $"Failed to start party vote !!! : exist party vote - {party_attribute.PartyVote.VoteTitle}";
            result.setFail(ServerErrorCode.AlreadyStartPartyVote, err_msg);
            Log.getLogger().error(err_msg);

            return result;
        }
        
        // 3. Last Vote Time 체크
        var last_vote_time = party_attribute.LastVoteTime ?? DateTimeHelper.MinTime.ToTimestamp();
        if (last_vote_time > DateTime.UtcNow.AddSeconds(-1 * MetaHelper.GameConfigMeta.VoteCoolTimeSec).ToTimestamp())
        {
            err_msg = $"Failed to start party vote !!! : invalid party vote time - {vote_title}";
            result.setFail(ServerErrorCode.InvalidPartyVoteTime, err_msg);
            Log.getLogger().error(err_msg);
            
            return result;
        }

        return await Task.FromResult(result);
    }

    private async Task waitPartyVoteFinish()
    {
        var cts = new CancellationTokenSource(TimeSpan.FromSeconds(MetaHelper.GameConfigMeta.VoteTimeLimitSec + 1));
        m_vote_finish_task_source = new();
        
        cts.Token.Register(() => { m_vote_finish_task_source.TrySetCanceled(); });
        try
        {
            await m_vote_finish_task_source.Task;
        }
        catch (OperationCanceledException)
        {
            // Ignore...
        }
        catch (Exception e)
        {
            Log.getLogger().error($"Failed to wait party vote !!! : exception finish task - {e}");
            return;
        }

        // 1. 파티 정보 획득
        var party = getOwner() as GlobalPartyDetail;
        NullReferenceCheckHelper.throwIfNull(party, () => $"global party detail is null !!");
        
        // 2. 투표 결과 수집
        var party_attribute = party.getEntityAttribute<PartyAttribute>();
        NullReferenceCheckHelper.throwIfNull(party_attribute, () => $"PartyAttribute is null !! - {party.toBasicString()}");

        // 3. 결과 수집
        var agreement = party_attribute.getVoteCount(VoteType.Agreement);
        var disAgreement = party_attribute.getVoteCount(VoteType.DisAgreement);
        var abstain = party_attribute.getVoteCount(VoteType.Abstain);
        abstain += party_attribute.getVoteCount(VoteType.None);
        
        // 4. 결과 통보 ( to server )
        var server_message = new ServerMessage();
        server_message.PartyVoteResultNoti = new();
        server_message.PartyVoteResultNoti.PartyGuid = party.PartyGuid;
        server_message.PartyVoteResultNoti.VoteTitle = party_attribute.PartyVote?.VoteTitle ?? string.Empty;
        server_message.PartyVoteResultNoti.ResultTrue = agreement;
        server_message.PartyVoteResultNoti.ResultFalse = disAgreement;
        server_message.PartyVoteResultNoti.Abstain = abstain;

        PartyHelper.BroadcastToServers(party, server_message, true);
        
        // 4. 결과 통보 ( to client )
        var client_message = new ClientToGame();
        client_message.Message = new();
        client_message.Message.PartyVoteResultNoti = new();
        client_message.Message.PartyVoteResultNoti.VoteTitle = party_attribute.PartyVote?.VoteTitle ?? string.Empty;
        client_message.Message.PartyVoteResultNoti.ResultTrue = agreement;
        client_message.Message.PartyVoteResultNoti.ResultFalse = disAgreement;
        client_message.Message.PartyVoteResultNoti.Abstain = abstain;

        PartyHelper.BroadcastToClients(party, client_message, new List<string>());
        
        // 5. Business Log 기록
        writeBusinessLog(party);
        
        // 6. 투표 데이터 삭제
        party_attribute.PartyVote = null;
    }

    private void writeBusinessLog(GlobalPartyDetail party)
    {
        var log_invokers = new List<ILogInvoker>(2);

        // 1. 파티정보
        var party_log_data = PartyBusinessLogHelper.toPartyLogData(party.PartyGuid, false);
        var party_business_log = new PartyBusinessLog(party_log_data);
        log_invokers.Add(party_business_log);

        // 2. 파티 투표 정보
        var party_vote_log = PartyBusinessLogHelper.toPartyVoteLogData(party.PartyGuid, false);
        var party_vote_business_log = new PartyVoteBusinessLog(party_vote_log);
        log_invokers.Add(party_vote_business_log);

        BusinessLogger.collectLogs(new LogActionEx(LogActionType.EndPartyVote), party, log_invokers);
    }
}