package iron.system;

import iron.math.Mat4;

#if lnx_vr
class VR {

	static var undistortionMatrix: Mat4 = null;

	public function new() {}

	public static function getUndistortionMatrix(): Mat4 {
		if (undistortionMatrix == null) {
			undistortionMatrix = Mat4.identity();
		}

		return undistortionMatrix;
	}

	public static function getMaxRadiusSq(): Float {
		return 0.0;
	}

	public static function initButton() {
		function vrDownListener(index: Int, x: Float, y: Float) {
			var vr = kha.vr.VrInterface.instance;
			if (vr == null || !vr.IsVrEnabled() || vr.IsPresenting()) return;
			var w: Float = iron.App.w();
			var h: Float = iron.App.h();
			if (x < w - 150 || y < h - 150) return;
			vr.onVRRequestPresent();
		}

		function vrRender2D(g: kha.graphics2.Graphics) {
			var vr = kha.vr.VrInterface.instance;
			if (vr == null || !vr.IsVrEnabled() || vr.IsPresenting()) return;
			var w: Float = iron.App.w();
			var h: Float = iron.App.h();
			g.color = 0xffff0000;
			g.fillRect(w - 150, h - 150, 140, 140);
		}

		kha.input.Mouse.get().notify(vrDownListener, null, null, null);
		iron.App.notifyOnRender2D(vrRender2D);

		var vr = kha.vr.VrInterface.instance; // Straight to VR (Oculus Carmel)
		if (vr != null && vr.IsVrEnabled()) {
			vr.onVRRequestPresent();
		}
	}
}
#end