/*
    * 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.commons.vfs2.provider.http4;
  
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  
  import java.net.MalformedURLException;
  import java.net.URL;
  
  import org.apache.commons.vfs2.FileContent;
  import org.apache.commons.vfs2.FileObject;
  import org.apache.commons.vfs2.FileSystemException;
  import org.apache.commons.vfs2.FileSystemManager;
  import org.apache.commons.vfs2.FileSystemOptions;
  import org.apache.commons.vfs2.VFS;
  import org.apache.commons.vfs2.auth.StaticUserAuthenticator;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests VFS-427 NPE on Http4FileObject.getContent().getContentInfo().
   */
  public class Http4GetContentInfoTest {
  
      FileSystemOptions getOptionsWithProxy() throws MalformedURLException {
          // get proxy host and port from env var "https_proxy"
          String proxyHost = null;
          int proxyPort = -1;
          final String proxyUrl = System.getenv("https_proxy");
          if (proxyUrl != null) {
              final URL url = new URL(proxyUrl);
              proxyHost = url.getHost();
              proxyPort = url.getPort();
          }
  
          // return null if proxy host or port invalid
          if (proxyHost == null || proxyPort == -1) {
              return null;
          }
  
          // return options with proxy
          final Http4FileSystemConfigBuilder builder = Http4FileSystemConfigBuilder.getInstance();
          final FileSystemOptions opts = new FileSystemOptions();
          builder.setProxyHost(opts, proxyHost);
          builder.setProxyPort(opts, proxyPort);
          builder.setProxyScheme(opts, "http");
          return opts;
      }
  
      private FileSystemOptions getOptionsWithProxyAuthentication() throws MalformedURLException {
          // get proxy host and port from env var "https_proxy"
          String proxyHost = null;
          int proxyPort = -1;
          String[] user = null;
          final String proxyUrl = System.getenv("https_proxy");
          if (proxyUrl != null) {
              final URL url = new URL(proxyUrl);
              proxyHost = url.getHost();
              proxyPort = url.getPort();
              final String userInfo = url.getUserInfo();
              if (userInfo != null) {
                  user = userInfo.split(":");
  
              }
          }
  
          // return null if proxy host or port invalid
          if (proxyHost == null || proxyPort == -1) {
              return null;
          }
  
          // return options with proxy
          final Http4FileSystemConfigBuilder builder = Http4FileSystemConfigBuilder.getInstance();
          final FileSystemOptions opts = new FileSystemOptions();
          builder.setProxyHost(opts, proxyHost);
          builder.setProxyPort(opts, proxyPort);
          if (user != null) {
              builder.setProxyAuthenticator(opts, new StaticUserAuthenticator(null, user[0], user[1]));
          }
          return opts;
      }
  
      /**
       * Tests VFS-427 NPE on Http4FileObject.getContent().getContentInfo().
       *
       * @throws FileSystemException thrown when the getContentInfo API fails.
      */
     @Test
     public void testGetContentInfo() throws FileSystemException, MalformedURLException {
         @SuppressWarnings("resource") // getManager() returns a global.
         final FileSystemManager fsManager = VFS.getManager();
         final String uri = "http4://www.apache.org/licenses/LICENSE-2.0.txt";
         try (FileObject fo = fsManager.resolveFile(uri, getOptionsWithProxy());
             final FileContent content = fo.getContent()) {
             assertNotNull(content);
             // Used to NPE before fix:
             content.getContentInfo();
         }
     }
 
     /**
      * Tests VFS-782 pass correct proxy authentication credentials.
      *
      * @throws FileSystemException thrown when the authentication fails.
      */
     @Test
     public void testGetContentWithProxyAuthInfo() throws FileSystemException, MalformedURLException {
         @SuppressWarnings("resource") // getManager() returns a global.
         final FileSystemManager fsManager = VFS.getManager();
         final String uri = "http4://www.apache.org/licenses/LICENSE-2.0.txt";
         try (FileObject fo = fsManager.resolveFile(uri, getOptionsWithProxyAuthentication());
             final FileContent content = fo.getContent()) {
             assertNotNull(content);
             content.getContentInfo();
         }
     }
 
 }