/// <summary>
/// Delete the current state, and activate the one bellow that.
/// </summary>
internal void PopState()
{
if (_states.Count < 2)
{
throw new StackOverflowException();
}
_states.Peek().OnExit();
OnStateExit?.Invoke(_states.Peek());
_states.Pop();
var currentState = _states.Peek();
State.InitStateManager(this);
currentState.OnEnter();
OnStateChanged?.Invoke(currentState);
}
/// <summary>
/// Calls OnExit on the current state (without Popping it), then Add a new one.
/// </summary>
internal void PushState(State state)
{
if (state == null)
{
Debug.LogWarning("[StateManager] Trying to Push a null state");
return;
}
if (_states.Count > 0)
{
_states.Peek().OnExit();
OnStateExit?.Invoke(_states.Peek());
}
_states.Push(state);
State.InitStateManager(this);
_states.Peek().OnEnter();
OnStateChanged?.Invoke(state);
}