/*
    * 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.eclipse.aether.transport.wagon;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.net.URI;
  import java.nio.charset.StandardCharsets;
  import java.util.Map;
  import java.util.Properties;
  
  import org.apache.maven.wagon.ConnectionException;
  import org.apache.maven.wagon.InputData;
  import org.apache.maven.wagon.OutputData;
  import org.apache.maven.wagon.ResourceDoesNotExistException;
  import org.apache.maven.wagon.StreamWagon;
  import org.apache.maven.wagon.TransferFailedException;
  import org.apache.maven.wagon.authentication.AuthenticationException;
  import org.apache.maven.wagon.authorization.AuthorizationException;
  import org.apache.maven.wagon.resource.Resource;
  
  /**
   */
  public class MemStreamWagon extends StreamWagon implements Configurable {
  
      private Map<String, String> fs;
  
      private Properties headers;
  
      private Object config;
  
      public void setConfiguration(Object config) {
          this.config = config;
      }
  
      public Object getConfiguration() {
          return config;
      }
  
      public void setHttpHeaders(Properties httpHeaders) {
          headers = httpHeaders;
      }
  
      @Override
      protected void openConnectionInternal() throws ConnectionException, AuthenticationException {
          fs = MemWagonUtils.openConnection(
                  this,
                  getAuthenticationInfo(),
                  getProxyInfo("mem", getRepository().getHost()),
                  headers);
      }
  
      @Override
      public void closeConnection() throws ConnectionException {
          fs = null;
      }
  
      private String getData(String resource) {
          return fs.get(URI.create(resource).getSchemeSpecificPart());
      }
  
      @Override
      public boolean resourceExists(String resourceName) throws TransferFailedException, AuthorizationException {
          String data = getData(resourceName);
          return data != null;
      }
  
      @Override
      public void fillInputData(InputData inputData)
              throws TransferFailedException, ResourceDoesNotExistException, AuthorizationException {
          String data = getData(inputData.getResource().getName());
          if (data == null) {
              throw new ResourceDoesNotExistException(
                      "Missing resource: " + inputData.getResource().getName());
          }
          byte[] bytes = data.getBytes(StandardCharsets.UTF_8);
          inputData.getResource().setContentLength(bytes.length);
          inputData.setInputStream(new ByteArrayInputStream(bytes));
      }
  
      @Override
     public void fillOutputData(OutputData outputData) throws TransferFailedException {
         outputData.setOutputStream(new ByteArrayOutputStream());
     }
 
     @Override
     protected void finishPutTransfer(Resource resource, InputStream input, OutputStream output)
             throws TransferFailedException, AuthorizationException, ResourceDoesNotExistException {
         String data = new String(((ByteArrayOutputStream) output).toByteArray(), StandardCharsets.UTF_8);
         fs.put(URI.create(resource.getName()).getSchemeSpecificPart(), data);
     }
 }