package th.in.oneauthen;


import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Base64;
import java.util.Random;

import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;

public class PDFmanipulate {

    public static final String DEST = "C:\\Users\\BallZaR5R5\\Desktop\\java-project\\testItext\\";

    public String signPDF(int page, byte[] pdfData, byte[] pictureData, float llx, float lly, float urx, float ury)
            throws IOException, DocumentException {

        String fileName = new PDFmanipulate().manipulatePdf(pdfData, pictureData, page, llx, lly, urx, ury);
        File file = new File(DEST + fileName);
        file.getParentFile().mkdirs();

        // byte[] input_file = Files.readAllBytes(Paths.get(DEST));
        // byte[] encodedBytes = Base64.getEncoder().encode(input_file);
        //
        // String pdfInBase64 = new String(encodedBytes);

        // System.out.println("originalString : " + pdfInBase64);

        // byte[] decodedBytes = Base64.getDecoder().decode(pdfInBase64.getBytes());
        // FileOutputStream fos = new
        // FileOutputStream("C:\\Users\\BallZaR5R5\\Desktop\\resume4.pdf");
        // fos.write(decodedBytes);
        // fos.flush();
        // fos.close();
        //

        byte[] pdfSign = Files.readAllBytes(file.toPath());
        byte[] encodedBytes = Base64.getEncoder().encode(pdfSign);
        String pdfInBase64 = new String(encodedBytes);

//      String Del = DEST + fileName;
//      Files.delete(Paths.get(Del));

        return pdfInBase64;

    }

    public String manipulatePdf(byte[] pdfData, byte[] pictureData, int page, float llx, float lly, float urx, float ury)
            throws IOException, DocumentException {
        PdfReader reader = new PdfReader(pdfData);
        reader.getNumberOfPages();
        float hight = reader.getPageSize(page).getHeight();
        float width = reader.getPageSize(page).getWidth();
        String filename = "Document" + "_" + new Random().nextInt(100000) + ".pdf";
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(DEST + filename));
        Image image = Image.getInstance(pictureData);
        image.setAbsolutePosition((float) width * llx, (float) hight * lly);
        // image.scalePercent(50, 50);
        image.scaleToFit((float) width * urx, (float) hight * ury);
        PdfContentByte over = stamper.getOverContent(page);// pageNum
        over.addImage(image);
        stamper.close();
        reader.close();
        return filename;
    }

}