using System.Collections.Concurrent;
using DotNetty.Buffers;
using DotNetty.Transport.Channels;
using log4net;

namespace HybirdFrameworkDriver.Session;

public class SessionMgr
{
    private static readonly ILog Log = LogManager.GetLogger(typeof(SessionMgr));

    private static readonly ConcurrentDictionary<string, IoSession> Dictionary =
        new ConcurrentDictionary<string, IoSession>();

    private static readonly ConcurrentDictionary<string, ModbusSession> ModbusDictionary =
        new ConcurrentDictionary<string, ModbusSession>();

    public ConcurrentDictionary<String, Object>? BusinessMap { get; set; }

    public static IoSession? GetSession(string key)
    {
        if (Dictionary.ContainsKey(key))
        {
            IoSession? value;
            Dictionary.TryGetValue(key, out value);

            return value;
        }

        return null;
    }

    public static List<IoSession> GetSessionList()
    {
        return Dictionary.Values.ToList();
    }

    public static ModbusSession GetModbusSession(string key)
    {
        if (ModbusDictionary.ContainsKey(key))
        {
            ModbusSession value;
            ModbusDictionary.TryGetValue(key, out value);

            return value;
        }

        return null;
    }

    public static void RegisterSession(IChannel channel, IoSession ioSession)
    {
        var oldKey = ioSession.Key;
        if (oldKey != null)
        {
            IoSession? session;
            Dictionary.Remove(oldKey, out session);
        }

        ChannelUtils.AddChannelSession(channel, ioSession);
        ioSession.Key = channel.Id.ToString();
        Dictionary.AddOrUpdate(channel.Id.ToString(), ioSession, (k, oldSession) => ioSession);
    }


    public static void RegisterModbusSession(string key, ModbusSession ioSession)
    {
        var oldKey = ioSession.Key;
        if (oldKey != null)
        {
            ModbusSession? session;
            ModbusDictionary.Remove(oldKey, out session);
        }

        ioSession.Key = key;
        ModbusDictionary.AddOrUpdate(key, ioSession, (k, oldSession) => ioSession);
    }

    public static void UnregisterSession(IChannel channel)
    {
        IoSession session = ChannelUtils.GetSessionBy(channel);
        IoSession? outSession;
        Dictionary.Remove(session.Key, out outSession);
        session.Close();
    }


    public static void Broadcast(IByteBuffer buffer, ConcurrentDictionary<string, IoSession> dictionary)
    {
        foreach (IoSession session in dictionary.Values)
        {
            session.Send(buffer);
        }
    }

    public static Object GetAttr(IoSession session, String key)
    {
        Object? obj;
        session.BusinessMap.TryGetValue(key, out obj);
        return obj;
    }

    public static void SetAttr(IoSession session, String key, Object obj)
    {
        session.BusinessMap.TryAdd(key, obj);
    }

    public static Object GetAttrByKey(String? key, String mapKey)
    {
        if (!string.IsNullOrEmpty(key))
        {
            Dictionary.TryGetValue(key, out IoSession? session);

            if (session != null)
            {
                session.BusinessMap.TryGetValue(mapKey, out Object? obj);

                if (obj != null)
                {
                    return (int)obj;
                }
            }
        }

        return 0;
    }

    public static void SetAttrModbus(ModbusSession session, String key, Object obj)
    {
        if (session.BusinessMap == null)
        {
            session.BusinessMap = new ConcurrentDictionary<string, object>();
        }

        session.BusinessMap.TryAdd(key, obj);
    }

    public static Object GetAttrModbus(String key, String mapKey)
    {
        ModbusDictionary.TryGetValue(key, out ModbusSession? session);

        if (session != null)
        {
            session.BusinessMap.TryGetValue(mapKey, out Object? obj);

            if (obj != null)
            {
                return (int)obj;
            }
        }

        return 0;
    }
}