cirnogodot/Scripts/Components/FSM/IStateMachine.cs

#nullable enable
using System.Collections.Generic;
using Godot;

namespace Cirno.Scripts.Components.FSM;

public interface IStateMachine<TKey, [MustBeVariant] TType> 
    where TKey : notnull
    where TType : Node
{
    public Dictionary<TKey, IState<TKey, TType>> States { get; set; }
    protected TKey CurrentStateIndex { get; set; }
    public IState<TKey, TType> CurrentState { get; }
    public TKey InitialState { get; }
    public void SetState(TKey stateId);
    public TKey GetState();

    public TType MainObject { get; }

    // Allow states to query modules by type from the owning actor
    public T? GetModule<T>() where T : Node;
}