/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.sdc;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.io.output.ByteArrayOutputStream;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class ZipUtil {

    public static void main(String[] args) {

        String zipFileName = "/src/test/resources/config/config.zip";

        zipFileName = "C:\\Git_work\\D2-SDnC\\catalog-be\\src\\test\\resources\\config\\config.zip";
        zipFileName = "src/test/resources/config/config.zip";

        Path path = Paths.get(zipFileName);

        try {
            byte[] zipAsBytes = Files.readAllBytes(path);
            // encode to base

            byte[] decodedMd5 = Base64.encodeBase64(zipAsBytes);
            String decodedStr = new String(decodedMd5);

            zipAsBytes = Base64.decodeBase64(decodedStr.getBytes());

            // String str = new String(zipAsBytes);

            // readZip(str.getBytes());
            readZip(zipAsBytes);

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    private static Map<String, byte[]> readZip(byte[] zipAsBytes) {

        Map<String, byte[]> fileNameToByteArray = new HashMap<>();

        byte[] buffer = new byte[1024];
        ZipInputStream zis = null;
        try {

            zis = new ZipInputStream(new ByteArrayInputStream(zipAsBytes));
            // get the zipped file list entry
            ZipEntry ze = zis.getNextEntry();

            while (ze != null) {

                String fileName = ze.getName();

                if (!ze.isDirectory()) {

                    ByteArrayOutputStream os = new ByteArrayOutputStream();
                    try {
                        int len;
                        while ((len = zis.read(buffer)) > 0) {
                            os.write(buffer, 0, len);
                        }

                        // aClass.outputStreamMethod(os);
                        String aString = new String(os.toByteArray(), "UTF-8");

                        fileNameToByteArray.put(fileName, os.toByteArray());

                    } finally {
                        if (os != null) {
                            os.close();
                        }
                    }
                }
                ze = zis.getNextEntry();

            }

            zis.closeEntry();
            zis.close();

        } catch (IOException ex) {
            ex.printStackTrace();
            return null;
        } finally {
            if (zis != null) {
                try {
                    zis.closeEntry();
                    zis.close();
                } catch (IOException e) {
                    // TODO: add log
                }

            }
        }

        return fileNameToByteArray;

    }

}