/*
    * Copyright 2012 The Netty Project
    *
    * The Netty Project 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:
    *
    *   https://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 io.netty.handler.codec.socksx.v5;
  
  import io.netty.handler.codec.DecoderResult;
  import io.netty.util.NetUtil;
  import io.netty.util.internal.ObjectUtil;
  import io.netty.util.internal.StringUtil;
  
  import java.net.IDN;
  
  /**
   * The default {@link Socks5CommandResponse}.
   */
  public final class DefaultSocks5CommandResponse extends AbstractSocks5Message implements Socks5CommandResponse {
  
      private final Socks5CommandStatus status;
      private final Socks5AddressType bndAddrType;
      private final String bndAddr;
      private final int bndPort;
  
      public DefaultSocks5CommandResponse(Socks5CommandStatus status, Socks5AddressType bndAddrType) {
          this(status, bndAddrType, null, 0);
      }
  
      public DefaultSocks5CommandResponse(
              Socks5CommandStatus status, Socks5AddressType bndAddrType, String bndAddr, int bndPort) {
  
          ObjectUtil.checkNotNull(status, "status");
          ObjectUtil.checkNotNull(bndAddrType, "bndAddrType");
  
          if (bndAddr != null) {
              if (bndAddrType == Socks5AddressType.IPv4) {
                  if (!NetUtil.isValidIpV4Address(bndAddr)) {
                      throw new IllegalArgumentException("bndAddr: " + bndAddr + " (expected: a valid IPv4 address)");
                  }
              } else if (bndAddrType == Socks5AddressType.DOMAIN) {
                  bndAddr = IDN.toASCII(bndAddr);
                  if (bndAddr.length() > 255) {
                      throw new IllegalArgumentException("bndAddr: " + bndAddr + " (expected: less than 256 chars)");
                  }
              } else if (bndAddrType == Socks5AddressType.IPv6) {
                  if (!NetUtil.isValidIpV6Address(bndAddr)) {
                      throw new IllegalArgumentException("bndAddr: " + bndAddr + " (expected: a valid IPv6 address)");
                  }
              }
          }
  
          if (bndPort < 0 || bndPort > 65535) {
              throw new IllegalArgumentException("bndPort: " + bndPort + " (expected: 0~65535)");
          }
          this.status = status;
          this.bndAddrType = bndAddrType;
          this.bndAddr = bndAddr;
          this.bndPort = bndPort;
      }
  
      @Override
      public Socks5CommandStatus status() {
          return status;
      }
  
      @Override
      public Socks5AddressType bndAddrType() {
          return bndAddrType;
      }
  
      @Override
      public String bndAddr() {
          return bndAddr;
      }
  
      @Override
      public int bndPort() {
          return bndPort;
      }
  
      @Override
      public String toString() {
          StringBuilder buf = new StringBuilder(128);
          buf.append(StringUtil.simpleClassName(this));
  
          DecoderResult decoderResult = decoderResult();
          if (!decoderResult.isSuccess()) {
              buf.append("(decoderResult: ");
              buf.append(decoderResult);
             buf.append(", status: ");
         } else {
             buf.append("(status: ");
         }
         buf.append(status());
         buf.append(", bndAddrType: ");
         buf.append(bndAddrType());
         buf.append(", bndAddr: ");
         buf.append(bndAddr());
         buf.append(", bndPort: ");
         buf.append(bndPort());
         buf.append(')');
 
         return buf.toString();
     }
 }