package funkin.util.macro;

#if macro
class FlxMacro
{
  /**
   * A macro to be called targeting the `FlxBasic` class.
   * @return An array of fields that the class contains.
   */
  public static macro function buildFlxBasic():Array<haxe.macro.Expr.Field>
  {
    var pos:haxe.macro.Expr.Position = haxe.macro.Context.currentPos();
    // The FlxBasic class. We can add new properties to this class.
    var cls:haxe.macro.Type.ClassType = haxe.macro.Context.getLocalClass().get();
    // The fields of the FlxClass.
    var fields:Array<haxe.macro.Expr.Field> = haxe.macro.Context.getBuildFields();

    // haxe.macro.Context.info('[INFO] ${cls.name}: Adding zIndex attribute...', pos);

    // Here, we add the zIndex attribute to all FlxBasic objects.
    // This has no functional code tied to it, but it can be used as a target value
    // for the FlxTypedGroup.sort method, to rearrange the objects in the scene.
    fields = fields.concat([
      {
        name: "zIndex", // Field name.
        access: [haxe.macro.Expr.Access.APublic], // Access level
        kind: haxe.macro.Expr.FieldType.FVar(macro :Int, macro $v{0}), // Variable type and default value
        pos: pos, // The field's position in code.
      }
    ]);

    return fields;
  }
}
#end