/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.hc.client5.http;
  
  import java.io.IOException;
  import java.net.ConnectException;
  import java.net.InetAddress;
  import java.net.SocketTimeoutException;
  import java.util.Arrays;
  
  import org.apache.hc.core5.annotation.Internal;
  import org.apache.hc.core5.net.NamedEndpoint;
  
  /**
   * Connect exception support methods.
   *
   * @since 5.0
   */
  @Internal
  public final class ConnectExceptionSupport {
  
      public static ConnectTimeoutException createConnectTimeoutException(
              final IOException cause, final NamedEndpoint namedEndpoint, final InetAddress... remoteAddresses) {
          final String message = "Connect to " +
                  (namedEndpoint != null ? namedEndpoint : "remote endpoint") +
                  (remoteAddresses != null && remoteAddresses.length > 0 ? " " + Arrays.asList(remoteAddresses) : "") +
                  ((cause != null && cause.getMessage() != null) ? " failed: " + cause.getMessage() : " timed out");
          return new ConnectTimeoutException(message, namedEndpoint);
      }
  
      public static HttpHostConnectException createHttpHostConnectException(
              final IOException cause,
              final NamedEndpoint namedEndpoint,
              final InetAddress... remoteAddresses) {
          final String message = "Connect to " +
                  (namedEndpoint != null ? namedEndpoint : "remote endpoint") +
                  (remoteAddresses != null && remoteAddresses.length > 0 ? " " + Arrays.asList(remoteAddresses) : "") +
                  ((cause != null && cause.getMessage() != null) ? " failed: " + cause.getMessage() : " refused");
          return new HttpHostConnectException(message, namedEndpoint);
      }
  
      public static IOException enhance(
              final IOException cause, final NamedEndpoint namedEndpoint, final InetAddress... remoteAddresses) {
          if (cause instanceof SocketTimeoutException) {
              final IOException ex = createConnectTimeoutException(cause, namedEndpoint, remoteAddresses);
              ex.setStackTrace(cause.getStackTrace());
              return ex;
          } else if (cause instanceof ConnectException) {
              if ("Connection timed out".equals(cause.getMessage())) {
                  final IOException ex = createConnectTimeoutException(cause, namedEndpoint, remoteAddresses);
                  ex.initCause(cause);
                  return ex;
              }
              final IOException ex = createHttpHostConnectException(cause, namedEndpoint, remoteAddresses);
              ex.setStackTrace(cause.getStackTrace());
              return ex;
          } else {
              return cause;
          }
      }
  
  }