package org.apache.archiva.common.utils;
   /*
    * 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.
   */
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.*;
  import java.nio.charset.Charset;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import java.nio.file.StandardOpenOption;
  import java.util.Comparator;
  import java.util.Optional;
  import java.util.zip.ZipEntry;
  import java.util.zip.ZipFile;
  
  /**
   * Utility class for file manipulation
   *
   * @author Martin Stockhammer <martin_s@apache.org>
   */
  public class FileUtils {
      private static final Logger log = LoggerFactory.getLogger(FileUtils.class);
  
      /**
       * Deletes the directory recursively and quietly.
       *
       * @param dir
       */
      public static void deleteQuietly(Path dir) {
          try {
              Files.walk(dir)
                      .sorted(Comparator.reverseOrder())
                      .forEach(file -> {
                          try {
                              Files.delete(file);
                          } catch (IOException e) {
                              // Ignore this
                          }
  
                      });
          } catch (IOException e) {
              // Ignore this
          }
  
  
      }
  
      public static void deleteDirectory(Path dir) throws IOException {
          if (!Files.exists(dir)) {
              return;
          }
          if (!Files.isDirectory(dir)) {
              throw new IOException("Given path is not a directory " + dir);
          }
          boolean result = true;
          try {
              result = Files.walk(dir)
                      .sorted(Comparator.reverseOrder())
                      .map(file ->
                      {
                          try {
                              Files.delete(file);
                              return Optional.of(Boolean.TRUE);
                          } catch (UncheckedIOException | IOException e) {
                              log.warn("File could not be deleted {}", file);
                              return Optional.empty();
                          }
  
                      }).allMatch(Optional::isPresent);
          } catch (UncheckedIOException e) {
              throw new IOException("File deletion failed ", e);
          }
          if (!result) {
              throw new IOException("Error during recursive delete of " + dir.toAbsolutePath());
          }
      }
  
      public static String readFileToString(Path file, Charset encoding) {
          try {
              return new String(Files.readAllBytes(file), encoding);
         } catch (IOException e) {
             log.error("Could not read from file {}", file);
             return "";
         }
     }
 
     public static void writeStringToFile(Path file, Charset encoding, String value) {
         try {
             Files.write(file, value.getBytes(encoding), StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
         } catch (IOException e) {
             log.error("Could not write to file {}", file);
         }
     }
 
     /**
      * Return the base directory
      *
      * @return
      */
     public static String getBasedir() {
         String basedir = System.getProperty("basedir");
         if (basedir == null) {
             basedir = Paths.get("").toAbsolutePath().toString();
         }
 
         return basedir;
     }
 
     /**
      * This checks, if the given child is a absolute path. If this is the case
      * the relative path is used.
      *
      * @param parent The parent directory
      * @param child  The child
      * @return The path parent/child
      */
     public Path resolveNonAbsolute(Path parent, String child) {
         Path childPath = Paths.get(child);
         if (childPath.isAbsolute()) {
             return parent.resolve(childPath.getNameCount() > 0 ? childPath.subpath(0, childPath.getNameCount()) : Paths.get(""));
         } else {
             return parent.resolve(child);
         }
     }
 
     public static void unzipFileEntry(ZipFile file, ZipEntry entry, Path destinationPath) throws IOException {
         InputStream is = file.getInputStream(entry);
         BufferedInputStream bis = new BufferedInputStream(is);
         Path uncompressedFilePath = destinationPath.resolve(entry.getName());
         Path parentPath = uncompressedFilePath.getParent();
         if (!Files.exists(parentPath)) {
             Files.createDirectories(parentPath);
         }
         Files.createFile(uncompressedFilePath);
         OutputStream fileOutput = Files.newOutputStream(uncompressedFilePath);
         while (bis.available() > 0) {
             fileOutput.write(bis.read());
         }
         fileOutput.close();
     }
 
 
     /**
      * Unzips a file into a destination directory. It does not update the modification time according the
      * the date in the zip file. All subdirectories will be created if the zip file contains a directory structure.
      *
      * @param zipFile the path to the zip file
      * @param destinationPath the destination path where the files should be extracted.
      * @throws IOException if an error occurs during extract.
      */
     public static void unzip(Path zipFile, Path destinationPath) throws IOException {
         try (ZipFile file = new ZipFile(zipFile.toFile())) {
             file.stream().forEach(e -> {
                 try {
                     if (e.isDirectory()) {
                         Files.createDirectories(destinationPath.resolve(e.getName()));
                     } else {
                         unzipFileEntry(file, e, destinationPath);
                     }
                 } catch (IOException ex) {
                     log.error("Error occured during unzip of zipFile={}, entry={}. Message: {}", zipFile, e.getName(), ex.getMessage());
                 }
             });
         }
     }
 }