/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE
 * file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file
 * to You 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 org.apache.tuweni.dist;

import static org.junit.jupiter.api.Assertions.assertTrue;

import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import org.junit.jupiter.api.Test;

/**
 * Tests no duplicate entries are present in the distribution zip file.
 */
class DistributionTest {

  private static Path distributionsFolder() {
    File currentFile = new File(DistributionTest.class.getProtectionDomain().getCodeSource().getLocation().getPath());
    // dist/build/classes/java/org/apache/tuweni/dist
    Path parentFolder = currentFile.toPath();
    while (!"dist".equals(parentFolder.getFileName().toString()) && parentFolder.getParent() != null) {
      parentFolder = parentFolder.getParent();
    }
    return parentFolder.resolve("build/distributions");
  }

  @Test
  void testZipFileContents() throws IOException {
    Map<String, Set<String>> dupes = new HashMap<>();
    boolean foundOneZipFile = false;
    Path distFolder = distributionsFolder();
    File distFolderFile = distFolder.toFile();
    assertTrue(distFolderFile.exists(), distFolder.toAbsolutePath() + " doesn't exist");
    for (File archive : distFolderFile.listFiles()) {
      if (archive.getName().endsWith(".zip")) {
        foundOneZipFile = true;
        Set<String> duplicates = new HashSet<>();
        Set<String> files = new HashSet<>();
        try (ZipFile zip = new ZipFile(archive)) {
          Enumeration<? extends ZipEntry> entries = zip.entries();
          while (entries.hasMoreElements()) {
            ZipEntry entry = entries.nextElement();
            if (!files.add(entry.getName())) {
              duplicates.add(entry.getName());
              dupes.putIfAbsent(archive.getName(), duplicates);
            }
          }
        }

      }
    }
    assertTrue(foundOneZipFile);
    for (Map.Entry<String, Set<String>> entry : dupes.entrySet()) {
      System.out.println("Archive :" + entry.getKey());
      for (String file : entry.getValue()) {
        System.out.println("\t-" + file);
      }
    }
    assertTrue(dupes.isEmpty());
  }
}