using Chickensoft.Collections;
using System;
using Zennysoft.Ma.Adapter;

namespace Zennysoft.Game.Ma;

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

  public IAutoProp<int> MaximumVT => _maximumVT;

  private readonly AutoProp<int> _currentVT;

  private readonly AutoProp<int> _maximumVT;

  private readonly int _initialValue;

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

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

  public void Reset()
  {
    _maximumVT.OnNext(_initialValue);
    _currentVT.OnNext(_initialValue);
  }

  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, bool restoreVT = true)
  {
    _maximumVT.OnNext(_maximumVT.Value + raiseAmount);
    if (restoreVT)
      Restore(raiseAmount);
  }

  public void SetMaximumVT(int vt)
  {
    _maximumVT.OnNext(vt);

    if (_currentVT.Value > _maximumVT.Value)
      _currentVT.OnNext(_maximumVT.Value);
  }
}