using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using GameNetworkLayer.Shared;

namespace CLre_server.API.MainServer
{
    public class Moderator
    {
        private static Moderator _instance = null;

        public static Moderator Instance
        {
            get
            {
                if (_instance == null) Init();
                return _instance;
            }
        }

        internal static void Init()
        {
            if (_instance == null) _instance = new Moderator();
        }

        private ModerationEngine _moderationEngine;

        private Moderator()
        {
            _moderationEngine = new ModerationEngine();
            Server.Instance.PlayerConnect += (sender, args) =>
            {
#if DEBUG
                Utility.Logging.MetaLog($"Player {args.PlayerId} is connecting, starting ban checker");
#endif
                CheckConnectingPlayerAsap(args.PlayerId).Run();
            };
        }

        public bool DisconnectPlayerById(string publicId)
        {
            int? playerId = _moderationEngine.FindConnectedPlayerById(publicId);
            if (playerId.HasValue)
            {
                UserVerification.Instance.DisconnectPlayer(playerId.Value, NetworkDispatcherCode.GameDataVerificationFail);
                return true;
            }

            return false;
        }
        
        public bool DisconnectPlayerByName(string name)
        {
            int? playerId = _moderationEngine.FindConnectedPlayerByName(name);
            if (playerId.HasValue)
            {
                UserVerification.Instance.DisconnectPlayer(playerId.Value, NetworkDispatcherCode.GameDataVerificationFail);
                return true;
            }

            return false;
        }
        
        public bool BanPlayerById(string publicId)
        {
            List<string> bans = new List<string>(CLre.Config.bans);
            if (!bans.Contains(publicId))
            {
                bans.Add(publicId);
                CLre.Config.bans = bans.ToArray();
            }
            return DisconnectPlayerById(publicId);
        }

        public bool BanPlayerByName(string name)
        {
            List<string> bans = new List<string>(CLre.Config.bans);
            if (!bans.Contains(name))
            {
                bans.Add(name);
                CLre.Config.bans = bans.ToArray();
            }
            return DisconnectPlayerByName(name);
        }

        public bool IsModerator(string name)
        {
            foreach (string modName in CLre.Config.moderators)
            {
                if (string.Compare(name, modName, StringComparison.InvariantCultureIgnoreCase) == 0)
                {
                    return true;
                }
            }

            Guid? publicId = _moderationEngine.FindConnectedPlayerGuidByName(name);
            if (publicId.HasValue)
            {
                foreach (string modGuid in CLre.Config.moderators)
                {
                    if (modGuid == publicId.ToString())
                    {
                        return true;
                    }
                }
            }
            
            return false;
        }
        
        public IEnumerator CheckConnectingPlayerAsap(int playerId)
        {
            while (Server.Instance.Players.Length <= playerId)
            {
                yield return null;
                yield return null;
                yield return null;
                yield return null;
            }
            var connector = Server.Instance.Players[playerId];
            if (CLre.Config.bans.Contains(connector.accountId.displayName)
                || CLre.Config.bans.Contains(connector.accountId.publicId.ToString()))
            {
#if DEBUG
                Utility.Logging.MetaLog($"Banned player {connector.accountId.displayName} ({connector.accountId.publicId}) tried to connect, kicking");
#endif
                UserVerification.Instance.DisconnectPlayer(playerId, NetworkDispatcherCode.GameDataVerificationFail);
            }
#if DEBUG
            else
            {
                Utility.Logging.MetaLog($"Player {connector.accountId.displayName} ({connector.accountId.publicId}) is not banned, skipping auto-kick");
            }
#endif
        }
    }
}