/**
 * 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.apache.ambari.server.state.alert;

import java.util.ArrayList;
import java.util.List;

import com.google.gson.annotations.SerializedName;

/**
 * Alert when the source type is defined as {@link SourceType#METRIC}
 * <p/>
 * Equality checking for instances of this class should be executed on every
 * member to ensure that reconciling stack differences is correct.
 */
public class MetricSource extends Source {

  @SerializedName("uri")
  private AlertUri uri = null;

  @SerializedName("jmx")
  private JmxInfo jmxInfo = null;

  @SerializedName("ganglia")
  private String gangliaInfo = null;

  /**
   * @return the jmx info, if this metric is jmx-based
   */
  public JmxInfo getJmxInfo() {
    return jmxInfo;
  }

  /**
   * @return the ganglia info, if this metric is ganglia-based
   */
  public String getGangliaInfo() {
    return gangliaInfo;
  }

  /**
   * @return the uri info, which may include port information
   */
  public AlertUri getUri() {
    return uri;
  }

  /**
   *
   */
  @Override
  public int hashCode() {
    final int prime = 31;
    int result = super.hashCode();
    result = prime * result
        + ((gangliaInfo == null) ? 0 : gangliaInfo.hashCode());
    result = prime * result + ((uri == null) ? 0 : uri.hashCode());
    result = prime * result + ((jmxInfo == null) ? 0 : jmxInfo.hashCode());

    return result;
  }

  /**
   *
   */
  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }

    if (!super.equals(obj)) {
      return false;
    }

    if (getClass() != obj.getClass()) {
      return false;
    }

    MetricSource other = (MetricSource) obj;
    if (gangliaInfo == null) {
      if (other.gangliaInfo != null) {
        return false;
      }
    } else if (!gangliaInfo.equals(other.gangliaInfo)) {
      return false;
    }

    if (uri == null) {
      if (other.uri != null) {
        return false;
      }
    } else if (!uri.equals(other.uri)) {
      return false;
    }

    if (jmxInfo == null) {
      if (other.jmxInfo != null) {
        return false;
      }
    } else if (!jmxInfo.equals(other.jmxInfo)) {
      return false;
    }

    return true;
  }

  /**
   * Represents the {@code jmx} element in a Metric alert.
   */
  public static class JmxInfo {
    @SerializedName("property_list")
    private List<String> propertyList;

    private String value;

    public List<String> getPropertyList() {
      return propertyList;
    }

    public String getValue() {
      return value;
    }

    @Override
    public boolean equals(Object object) {
      if (!JmxInfo.class.isInstance(object)) {
        return false;
      }

      JmxInfo other = (JmxInfo)object;

      List<String> list1 = new ArrayList<>(propertyList);
      List<String> list2 = new ArrayList<>(other.propertyList);

      // !!! even if out of order, this is enough to fail
      return list1.equals(list2);

    }
  }
}