namespace Supercell.Laser.Server.Networking
{
    using Supercell.Laser.Server.Networking.Session;
    using Supercell.Laser.Server.Logic;

    public static class Connections
    {
        private static readonly object SyncRoot = new object();

        public static int Count
        {
            get
            {
                lock (SyncRoot)
                {
                    return ActiveConnections.Count;
                }
            }
        }

        private static List<Connection> ActiveConnections;
        private static Thread Thread;

        public static void Init()
        {
            ActiveConnections = new List<Connection>();
            Thread = new Thread(Update);
            Thread.Start();
        }

        private static void Update()
        {
            while (true)
            {
                foreach (Connection connection in GetSnapshot())
                {
                    if (!connection.MessageManager.IsAlive())
                    {
                        RemoveConnection(connection, "heartbeat-timeout");
                    }
                }
                Thread.Sleep(1000);
            }
        }

        public static void AddConnection(Connection connection)
        {
            lock (SyncRoot)
            {
                ActiveConnections.Add(connection);
            }
        }

        public static void RemoveConnection(Connection connection, string reason)
        {
            bool removed;

            lock (SyncRoot)
            {
                removed = ActiveConnections.Remove(connection);
            }

            if (!removed)
            {
                return;
            }

            if (connection.MessageManager.HomeMode != null && connection.Avatar != null)
            {
                Sessions.Remove(connection.Avatar.AccountId);
            }

            connection.Close();
            Logger.Network($"Closed {(connection == null ? "conn#?" : connection.Describe())} — {reason}, {Connections.Count} connections, {Sessions.Count} online");
        }

        private static Connection[] GetSnapshot()
        {
            lock (SyncRoot)
            {
                return ActiveConnections.ToArray();
            }
        }

        public static Connection[] GetConnectionsSnapshot()
        {
            return GetSnapshot();
        }
    }
}