using ZXing;
using ZXing.QrCode;
using UnityEngine;

public class QRGen : MonoBehaviour {

	private static QRGen _instance;

	public static QRGen Instance {
		get { 
			if (_instance == null) {
				_instance = new QRGen ();
			}
			return _instance;
		}
	}


	public Texture2D generateQR(string text)
	{
		var encoded = new Texture2D(256, 256);
		var color32 = Encode(text, encoded.width, encoded.height);
		encoded.SetPixels32(color32);
		encoded.Apply();
		return encoded;
	}
	private static Color32[] Encode(string textForEncoding, int width, int height)
	{
		var writer = new BarcodeWriter
		{
			Format = BarcodeFormat.QR_CODE,
			Options = new QrCodeEncodingOptions
			{
				Height = height,
				Width = width,
				Margin = 1
			}
		};
		return writer.Write(textForEncoding);
	}

	private Color32[] Write(string content,int width,int height){
		var writer = new BarcodeWriter {
			Format = BarcodeFormat.QR_CODE,
			Options = new QrCodeEncodingOptions {
				Height = height,
				Width = width
			}
		};
		return writer.Write (content);
	}
}