using System;
using ln.types.btree;
using ln.types.net;
using skyspot.session;
using skyspot.ip;
namespace skyspot.hotspot
{
    public class HotspotNetworkRuntime
    {
        public HotspotNetwork HotspotNetwork { get; private set; }

        MappingBTree<MAC, ClientSession> currentSessions = new MappingBTree<MAC, ClientSession>((ClientSession clientSession)=>clientSession.ClientMAC);
        IPPool<ClientSession> pool = new IPPool<ClientSession>();


        private HotspotNetworkRuntime()
        {
        }
        public HotspotNetworkRuntime(HotspotNetwork hotspotNetwork)
        {
            HotspotNetwork = hotspotNetwork;
        }

        public ClientSession GetSession(MAC clientMac)
        {
            if (!currentSessions.ContainsKey(clientMac))
            {
                ClientSession newSession = new ClientSession(HotspotNetwork, clientMac);
                FixupSession(newSession);
                currentSessions.Add(newSession);
                return newSession;
            }
            else
            {
                ClientSession clientSession = currentSessions[clientMac];
                FixupSession(clientSession);
                return clientSession; ;
            }
        }
        public void RemoveSession(MAC clientMac)
        {
            currentSessions.RemoveKey(clientMac);
        }

        private void FixupSession(ClientSession clientSession)
        {
            if (clientSession.ClientIP == null)
            {
                // Todo: Implement IP allocation from pool
            }
        }

    }
}