// This file is part of Notepad++ project
// Copyright (C)2021 Don HO <don.h@free.fr>

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// at your option any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

import org.apache.commons.codec.binary.Base64;
import java.util.zip.*;
import java.util.*;
import java.text.*;
import java.io.*;

class zipB64 {

    protected static String encodeMessage(String messageStr) {
        try {
            ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
            Deflater deflater = new Deflater(Deflater.DEFLATED);
            DeflaterOutputStream deflaterStream = new DeflaterOutputStream(bytesOut, deflater);
            deflaterStream.write(messageStr.getBytes("UTF-8"));
            deflaterStream.finish();

            Base64 b = new Base64(-1);
            return new String(b.encode(bytesOut.toByteArray()));            
		} catch (Exception e) {
			return "crotte";
		}
    }

    protected static String decodeMessage(String encodedMessage) {
		try {
			Base64 b = new Base64();
			byte[] decodedBase64 = b.decode(encodedMessage.getBytes());

			// Decompress the bytes
			
			ByteArrayInputStream bytesIn = new ByteArrayInputStream(decodedBase64);
			InflaterInputStream inflater = new InflaterInputStream(bytesIn);

			int nbRead = 0;
			StringBuilder sb = new StringBuilder();
			while (nbRead >= 0) {
				byte[] result = new byte[500];
				nbRead = inflater.read(result,0,result.length);
				if (nbRead > 0) {
					sb.append(new String(result, 0, nbRead, "UTF-8"));
				}
			}
			return sb.toString();
		} catch (Exception e) {
			return "zut";
		}
    }

	public static void main (String args[]) {
		if (args.length != 2 || (args[0].compareTo("-zip") != 0 && args[0].compareTo("-unzip") != 0)) 
		{
			System.out.println("java zipB64 <-zip|-unzip> \"message\"");
			return;
		}
		boolean doZip = args[0].compareTo("-zip") == 0;
		if (doZip)
			System.out.println(encodeMessage(args[1]));
		else
			System.out.println(decodeMessage(args[1]));
	}
}