package com.pennant.qrcode.reader;


import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.Serializable;
import java.util.Hashtable;

import javax.imageio.ImageIO;
import javax.imageio.stream.ImageInputStream;

import org.apache.commons.codec.binary.Base64;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.NotFoundException;
import com.google.zxing.Reader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.multi.qrcode.QRCodeMultiReader;
import com.google.zxing.qrcode.QRCodeReader;

public class QRCodeReaderTest implements Serializable {

	private static final long serialVersionUID = 1293284494250774077L;

	/**
	 * Method for Reading Pdf File BarCode(QRCode)
	 * 
	 * @param inputStream
	 * @param fileType
	 * @return
	 * @throws NotFoundException
	 * @throws IOException
	 */
	public String getQRBarcode(String encodedString)
			throws NotFoundException, IOException {
		// Get Base64 and convert to inputstream
		ByteArrayInputStream rawInputStream = new ByteArrayInputStream(Base64.decodeBase64(encodedString));

		// Convert inputstream to image input stream
		ImageInputStream imageInput = ImageIO.createImageInputStream(rawInputStream);
		
		// Read buffered image from image input stream
		BufferedImage bimage = ImageIO.read(imageInput);
		
		// Get the QR Code from the image as string
		return parseQR(bimage);
	}

	/**
	 * Method for Parse Quick Reference Code From Buffered image
	 * 
	 * @param image
	 * @return
	 * @throws Exception
	 */
	private String parseQR(BufferedImage image) throws NotFoundException {

		String text = "";
		try {

			LuminanceSource source = new BufferedImageLuminanceSource(image);
			BinaryBitmap bitmap = new BinaryBitmap(
					new com.google.zxing.common.HybridBinarizer(source));

			Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
			hints.put(DecodeHintType.POSSIBLE_FORMATS, BarcodeFormat.QR_CODE);
			hints.put(DecodeHintType.TRY_HARDER, BarcodeFormat.QR_CODE);

			QRCodeMultiReader multiReader = new QRCodeMultiReader();
			Result[] results = multiReader.decodeMultiple(bitmap, hints);

			for (int k = 0; k < results.length; k++) {
				text = text + results[k].getText();
			}

		} catch (NotFoundException e) {
			System.err.println(e.getMessage());
			e.printStackTrace();
		}

		if (text != null && text.length() > 0) {
			//text = text.replace("|", "~");
			//String[] listQrCode = text.split("~");

			String[] listQrCode = text.split("|");
			
			//System.out.println("listQrCode.length" + listQrCode.length);

			if (listQrCode.length > 0) {
				String pdfReqType = "";
				pdfReqType = listQrCode[0];
				//System.out.println("pdfReqType" + pdfReqType);
/*				for (int i = 0; i < listQrCode.length; i++) {
					System.out.println(listQrCode[i]);
				}
*/			}
		}

		return text;
	}
}