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/**
 * Copyright 2015 Smoke Turner, LLC.
 *
 * Licensed 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 com.smoketurner.notification.application.riak;

import java.util.Objects;

import com.basho.riak.client.api.annotations.RiakBucketName;
import com.basho.riak.client.api.annotations.RiakContentType;
import com.basho.riak.client.api.annotations.RiakKey;
import com.basho.riak.client.api.annotations.RiakLastModified;
import com.basho.riak.client.api.annotations.RiakTombstone;
import com.basho.riak.client.api.annotations.RiakVClock;
import com.basho.riak.client.api.annotations.RiakVTag;
import com.basho.riak.client.api.cap.VClock;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.MoreObjects;
import com.google.common.base.Preconditions;
import com.google.common.collect.ComparisonChain;
import com.google.common.collect.Ordering;

@JsonIgnoreProperties(ignoreUnknown = true)
@JsonInclude(JsonInclude.Include.NON_NULL)
public final class CursorObject implements Comparable {

  @RiakBucketName
  private final String bucketName = "cursors";

  @RiakKey
  private String key;

  @RiakVClock
  private VClock vclock;

  @RiakTombstone
  private boolean tombstone;

  @RiakContentType
  private String contentType;

  @RiakLastModified
  private Long lastModified;

  @RiakVTag
  private String vtag;

  private long value;

  /**
   * Constructor
   */
  public CursorObject() {
    // needed to handle tombstones
  }

  /**
   * Constructor
   *
   * @param key
   * @param value
   */
  @JsonCreator
  public CursorObject(@JsonProperty("key") final String key, @JsonProperty("value") final long value) {
    this.key = Preconditions.checkNotNull(key);
    this.value = value;
  }

  @JsonProperty
  public String getKey() {
    return key;
  }

  @JsonProperty
  public long getValue() {
    return value;
  }

  @JsonProperty
  public void setValue(final long value) {
    this.value = value;
  }

  @Override
  public boolean equals(final Object obj) {
    if (this == obj) {
      return true;
    }
    if ((obj == null) || (getClass() != obj.getClass())) {
      return false;
    }

    final CursorObject other = (CursorObject) obj;
    return Objects.equals(key, other.key) && Objects.equals(vclock, other.vclock)
        && Objects.equals(tombstone, other.tombstone)
        && Objects.equals(contentType, other.contentType)
        && Objects.equals(lastModified, other.lastModified) && Objects.equals(vtag, other.vtag)
        && Objects.equals(value, other.value);
  }

  @Override
  public int hashCode() {
    return Objects.hash(key, vclock, tombstone, contentType, lastModified, vtag, value);
  }

  @Override
  public String toString() {
    return MoreObjects.toStringHelper(this).add("key", key).add("value", value).toString();
  }

  @Override
  public int compareTo(final CursorObject that) {
    return ComparisonChain.start().compare(this.value, that.value, Ordering.natural().reverse())
        .result();
  }
}