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/*
 * 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.jclouds.profitbricks.domain;

import static org.jclouds.profitbricks.util.Preconditions.checkIcmp;
import static org.jclouds.profitbricks.util.Preconditions.checkIp;
import static org.jclouds.profitbricks.util.Preconditions.checkMacAddress;
import static org.jclouds.profitbricks.util.Preconditions.checkPortRange;

import java.util.List;

import org.jclouds.javax.annotation.Nullable;

import com.google.auto.value.AutoValue;
import shaded.com.google.common.base.Enums;
import shaded.com.google.common.collect.ImmutableList;

@AutoValue
public abstract class Firewall {

   public enum Protocol {

      TCP, UDP, ICMP, ANY, UNRECOGNIZED;

      public static Protocol fromValue(String value) {
         return Enums.getIfPresent(Protocol.class, value).or(UNRECOGNIZED);
      }
   }

   @Nullable
   public abstract String id();

   @Nullable
   public abstract String nicId();

   @Nullable
   public abstract Boolean active();

   @Nullable
   public abstract ProvisioningState state();

   @Nullable
   public abstract List rules();

   public static Builder builder() {
      return new AutoValue_Firewall.Builder()
              .rules(ImmutableList.of());
   }

   public abstract Builder toBuilder();

   @AutoValue.Builder
   public abstract static class Builder {

      public abstract Builder id(String id);

      public abstract Builder nicId(String nicId);

      public abstract Builder active(Boolean active);

      public abstract Builder state(ProvisioningState state);

      public abstract Builder rules(List rules);

      abstract Firewall autoBuild();
      
      public Firewall build(){
         Firewall built = autoBuild();
         
         return built.toBuilder()
                 .rules(ImmutableList.copyOf(built.rules()))
                 .autoBuild();
      }
   }

   public static final class Request {

      public static AddRulePayload createAddRulePayload(String nicId, List rules) {
         return new AutoValue_Firewall_Request_AddRulePayload(nicId, ImmutableList.copyOf(rules));
      }

      @AutoValue
      public abstract static class AddRulePayload {

         public abstract String nicId();

         public abstract List rules();

      }
   }

   @AutoValue
   public abstract static class Rule {

      @Nullable
      public abstract String id();

      @Nullable
      public abstract String name();

      @Nullable
      public abstract Integer portRangeEnd();

      @Nullable
      public abstract Integer portRangeStart();

      @Nullable
      public abstract Protocol protocol();

      @Nullable
      public abstract String sourceIp();

      @Nullable
      public abstract String sourceMac();

      @Nullable
      public abstract String targetIp();

      @Nullable
      public abstract Integer icmpCode();

      @Nullable
      public abstract Integer icmpType();

      public static Builder builder() {
         return new AutoValue_Firewall_Rule.Builder()
                 .protocol(Protocol.ANY);
      }

      public abstract Builder toBuilder();

      @AutoValue.Builder
      public abstract static class Builder {

         public abstract Builder id(String id);

         public abstract Builder name(String name);

         public abstract Builder portRangeEnd(Integer portRangeEnd);

         public abstract Builder portRangeStart(Integer portRangeStart);

         public abstract Builder protocol(Protocol protocol);

         public abstract Builder sourceIp(String sourceIp);

         public abstract Builder sourceMac(String sourceMac);

         public abstract Builder targetIp(String targetIp);

         public abstract Builder icmpCode(Integer icmpCode);

         public abstract Builder icmpType(Integer icmpType);

         abstract Rule autoBuild();

         public Rule build() {
            Rule rule = autoBuild();
            if (rule.sourceIp() != null)
               checkIp(rule.sourceIp());
            if (rule.targetIp() != null)
               checkIp(rule.targetIp());
            if (rule.sourceMac() != null)
               checkMacAddress(rule.sourceMac());
            checkPortRange(rule.portRangeStart(), rule.portRangeEnd(), rule.protocol());
            checkIcmp(rule.icmpType(), rule.icmpCode(), rule.protocol());

            return rule;
         }
      }
   }
}