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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.scriptbuilder.domain.chef;

import static shaded.com.google.common.base.Preconditions.checkNotNull;

import shaded.com.google.common.base.MoreObjects;
import shaded.com.google.common.base.Objects;
import shaded.com.google.common.base.Optional;

/**
 * A Role to be configured for a Chef Solo run.
 */
public class Role {

   public static Builder builder() {
      return new Builder();
   }

   public static class Builder {
      private String name;
      private String description;
      private String jsonDefaultAttributes;
      private String jsonOverrideAttributes;
      private RunList runlist;

      public Builder name(String name) {
         this.name = checkNotNull(name, "name must be set");
         return this;
      }

      public Builder description(String description) {
         this.description = checkNotNull(description, "description must be set");
         return this;
      }

      public Builder jsonDefaultAttributes(String jsonDefaultAttributes) {
         this.jsonDefaultAttributes = checkNotNull(jsonDefaultAttributes, "jsonDefaultAttributes must be set");
         return this;
      }

      public Builder jsonOverrideAttributes(String jsonOverrideAttributes) {
         this.jsonOverrideAttributes = checkNotNull(jsonOverrideAttributes, "jsonOverrideAttributes must be set");
         return this;
      }

      public Builder runlist(RunList runlist) {
         this.runlist = checkNotNull(runlist, "runlist must be set");
         return this;
      }

      public Role build() {
         return new Role(name, Optional.fromNullable(description), Optional.fromNullable(jsonDefaultAttributes),
               Optional.fromNullable(jsonOverrideAttributes), Optional.fromNullable(runlist));
      }
   }

   private String name;
   private Optional description;
   private Optional jsonDefaultAttributes;
   private Optional jsonOverrideAttributes;
   private RunList runlist;

   protected Role(String name, Optional description, Optional jsonDefaultAttributes,
         Optional jsonOverrideAttributes, Optional runlist) {
      this.name = checkNotNull(name, "name must be set");
      this.description = checkNotNull(description, "description must be set");
      this.jsonDefaultAttributes = checkNotNull(jsonDefaultAttributes, "jsonDefaultAttributes must be set");
      this.jsonOverrideAttributes = checkNotNull(jsonOverrideAttributes, "jsonOverrideAttributes must be set");
      this.runlist = checkNotNull(runlist, "runlist must be set").or(RunList.builder().build());
   }

   public String toJsonString() {
      StringBuilder json = new StringBuilder();
      json.append("{");
      json.append("\"name\": \"").append(name).append("\",");
      json.append("\"description\":\"").append(description.or("")).append("\",");
      json.append("\"default_attributes\":").append(jsonDefaultAttributes.or("{}")).append(",");
      json.append("\"override_attributes\":").append(jsonOverrideAttributes.or("{}")).append(",");
      json.append("\"json_class\":\"Chef::Role\",");
      json.append("\"chef_type\":\"role\",");
      json.append("\"run_list\":" + runlist.toString());
      json.append("}");
      return json.toString();
   }

   public String getName() {
      return name;
   }

   public Optional getDescription() {
      return description;
   }

   public Optional getJsonDefaultAttributes() {
      return jsonDefaultAttributes;
   }

   public Optional getJsonOverrideAttributes() {
      return jsonOverrideAttributes;
   }

   public RunList getRunlist() {
      return runlist;
   }

   @Override
   public int hashCode() {
      return Objects.hashCode(name);
   }

   @Override
   public boolean equals(Object obj) {
      if (this == obj) {
         return true;
      }
      if (obj == null) {
         return false;
      }
      if (getClass() != obj.getClass()) {
         return false;
      }
      Role other = Role.class.cast(obj);
      return Objects.equal(name, other.name);
   }

   @Override
   public String toString() {
      return MoreObjects.toStringHelper(this).omitNullValues().add("name", name).add("description", description.orNull())
            .toString();
   }

}