/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
//  D E R E L I C T
//
/// // (c) 2003..2024
/*
So, someone on the Godot.CSharp channel asked about a generic way to do covariant style (I think its covariant) code for running a different function per type

I wrote a way to do it using static lambdas on a generic class, and realized I could do a trait style system with it.

Going to have to investigate it a bit further to see if it would make some code easier.
*/

using Godot;
using System;

namespace dbg;

public class GenericSetText
{
	static public void SetText<T>( T v, string text ) => GenericSetText<T>.FnSetText( v, text );
}

public class GenericSetText<T>
{
	static public Action<T, string> FnSetText = ( v, s ) => GD.PrintErr( $"On {typeof( T ).Name} trying to SetText" );
	static public void SetText( T v, string text ) => GenericSetText<T>.FnSetText( v, text );
}

static public class GenericTest
{
	static GenericTest()
	{
		GenericSetText<Control>.FnSetText = ( label, s ) =>
		{
			var type = typeof( GenericSetText<> ).MakeGenericType( label.GetType() );
			var method = type.GetMethod( "SetText", 1, new Type[1] { label.GetType() } );
			method.Invoke( label, new object[1] { s } );
		};

		GenericSetText<Label>.FnSetText = ( label, s ) => label.Text = s;
		GenericSetText<Button>.FnSetText = ( button, s ) => button.Text = s;
		GenericSetText<TextEdit>.FnSetText = ( textEdit, s ) => textEdit.Text = s;
		GenericSetText<RichTextLabel>.FnSetText = ( richText, s ) => richText.Text = s;

		GenericSetText<string>.FnSetText = ( v, s ) => { };
	}

	static public void RunTests()
	{
		Control controlTest = new Button();
		GenericSetText.SetText( controlTest, "Button text" );
		Button buttonTest = new();
		GenericSetText.SetText( buttonTest, "Button text" );
		Label labelTest = new();
		GenericSetText.SetText( labelTest, "Label Text" );
		TextEdit textEditTest = new();
		GenericSetText.SetText( textEditTest, "Label Text" );
		int integerTest = 10;
		GenericSetText.SetText( integerTest, "Integer Test" );
	}
}