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/*
 * Copyright 2021-2024 the original author or authors.
 *
 * 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.
 */
package com.metaeffekt.artifact.analysis.report.common;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.zip.GZIPOutputStream;

public abstract class EncoderUtilities {

    public static ByteArrayOutputStream gzipCompress(String dataToBeEncoded) throws IOException {
        final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        try (final GZIPOutputStream gzipOutputStream = new GZIPOutputStream(byteArrayOutputStream)) {
            gzipOutputStream.write(dataToBeEncoded.getBytes(StandardCharsets.UTF_8));
        }

        return byteArrayOutputStream;
    }

    public static String base64Encode(byte[] dataToBeEncoded) {
        return Base64.getEncoder().encodeToString(dataToBeEncoded);
    }

    public static String base64Encode(String dataToBeEncoded) {
        return Base64.getEncoder().encodeToString(dataToBeEncoded.getBytes(StandardCharsets.UTF_8));
    }

    public static String prepareCompressedDataInitialization(String variableName, String data) throws IOException {
        return "const " + variableName + " = \"" + EncoderUtilities.base64Encode(EncoderUtilities.gzipCompress(data).toByteArray()) + "\"";
    }
}