using Chickensoft.Collections;

namespace Zennysoft.Game.Implementation.Components;

public class VTComponent
{
  public IAutoProp<int> CurrentVT => _currentVT;

  public IAutoProp<int> MaximumVT => _maximumVT;

  private readonly AutoProp<int> _currentVT;

  private readonly AutoProp<int> _maximumVT;

  public bool AtFullVT => CurrentVT.Value == MaximumVT.Value;

  public VTComponent(int initialVT)
  {
    _maximumVT = new AutoProp<int>(initialVT);
    _currentVT = new AutoProp<int>(initialVT);
  }

  public void Restore(int restoreAmount)
  {
    var cappedAmount = Math.Min(restoreAmount + _currentVT.Value, _maximumVT.Value);
    _currentVT.OnNext(cappedAmount);
  }

  public void Reduce(int reduceAmount)
  {
    var cappedAmount = Math.Max(_currentVT.Value - reduceAmount, 0);
    _currentVT.OnNext(cappedAmount);
  }

  public void SetVT(int vt)
  {
    var cappedAmount = Math.Min(vt, _maximumVT.Value);
    _currentVT.OnNext(cappedAmount);
  }

  public void RaiseMaximumVT(int raiseAmount)
  {
    _maximumVT.OnNext(raiseAmount);
    Restore(raiseAmount);
  }
}