using System.Collections.Generic;

using Syntriax.Engine.Core;

namespace Syntriax.Engine.Network;

public class NetworkManager : UniverseObject, INetworkManager
{
    public INetworkCommunicator NetworkCommunicator { get; set; } = null!;

    private readonly Dictionary<string, INetworkEntity> _networkEntities = [];
    public IReadOnlyDictionary<string, INetworkEntity> NetworkEntities => _networkEntities;

    private readonly BehaviourCollector<INetworkEntity> _networkEntityCollector = new();
    public IBehaviourCollector<INetworkEntity> NetworkEntityCollector => _networkEntityCollector;

    public NetworkManager()
    {
        _networkEntityCollector.OnCollected += OnCollected;
        _networkEntityCollector.OnRemoved += OnRemoved;
    }

    private void OnCollected(IBehaviourCollector<INetworkEntity> sender, INetworkEntity behaviourCollected)
    {
        if (!_networkEntities.TryAdd(behaviourCollected.Id, behaviourCollected))
            throw new($"Unable to add {behaviourCollected.Id} to {nameof(NetworkManager)}");
    }

    private void OnRemoved(IBehaviourCollector<INetworkEntity> sender, INetworkEntity behaviourRemoved)
    {
        _networkEntities.Remove(behaviourRemoved.Id);
    }

    protected override void OnEnteringUniverse(IUniverse universe) => _networkEntityCollector.Assign(universe);
    protected override void OnExitingUniverse(IUniverse universe) => _networkEntityCollector.Unassign();
}