using System.Diagnostics;
using System.Collections;
using System.Collections.Generic;
using System;
using Godot;


using Rokojori.Extensions;
namespace Rokojori
{  
  public class AssignedShaderProperty
  {   
    public ShaderProperty property;
    public Variant value;

    public static AssignedShaderProperty From( ShaderProperty sp )
    {
      var asp = new AssignedShaderProperty();
      asp.property = sp;        
      return asp;
    }

    public bool Update( bool showChangeMessage = false )
    {
      if ( ! NeedsUpdate() )
      {
        return false; 
      }

      if ( showChangeMessage )
      {
        RJLog.Log( "Update from", value, "to", property.GetValue() );
      } 


      property.ApplyGlobal();
      value = property.GetValue();

      return true;    
      
    }

    bool NeedsUpdate()
    {
      if ( value.AsGodotObject() is Texture2D tex )
      {
        var pTexture = property.GetValue().AsGodotObject() as Texture2D;

        var same = tex == pTexture;
        
        if ( ! same )
        {
          RJLog.Log( "textures changed:", tex, ">>", pTexture );
        }

        return ! same;
      }

      if ( value.Equals( property.GetValue() ) )
      {
        return false; 
      }

      return true;
    }
  }
}