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package com.github.awsjavakit.eventbridge.models;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.github.awsjavakit.jsonconfig.JsonConfig;
import com.github.awsjavakit.misc.JacocoGenerated;
import java.net.URI;
import java.time.Instant;
import java.util.Objects;

/**
 * An {@link EventReference} is a reference to an event that has happened and the associated data
 * are stored to a location. The location is stored in the EventReference as a URI. The
 * {@link EventReference} contains also the topic of the event
 */
public class EventReference implements EventBody {

  public static final String TOPIC = "topic";
  public static final String URI = "uri";
  public static final String SUBTOPIC = "subtopic";
  public static final String TIMESTAMP = "timestamp";
  @JsonProperty(TOPIC)
  private final String topic;
  @JsonProperty(SUBTOPIC)
  private final String subtopic;
  @JsonProperty(URI)
  private final URI uri;
  @JsonProperty(TIMESTAMP)
  private final Instant timestamp;

  @JsonCreator
  public EventReference(@JsonProperty(TOPIC) String topic,
    @JsonProperty(value = SUBTOPIC) String subtopic,
    @JsonProperty(URI) URI uri,
    @JsonProperty(TIMESTAMP) Instant timestamp) {
    this.topic = topic;
    this.subtopic = subtopic;
    this.uri = uri;
    this.timestamp = timestamp;
  }

  public EventReference(String topic,
    String subtopic,
    URI uri) {
    this(topic, subtopic, uri, Instant.now());
  }

  public EventReference(String topic, URI uri) {
    this(topic, null, uri);
  }

  public static EventReference fromJson(String json) {
    return JsonConfig.readValue(json, EventReference.class);
  }

  public Instant getTimestamp() {
    return timestamp;
  }

  @JacocoGenerated
  public String getSubtopic() {
    return subtopic;
  }

  @Override
  @JacocoGenerated
  public String getTopic() {
    return topic;
  }

  @JacocoGenerated
  public URI getUri() {
    return uri;
  }

  public String extractBucketName() {
    return uri.getHost();
  }

  @Override
  @JacocoGenerated
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (!(o instanceof EventReference)) {
      return false;
    }
    EventReference that = (EventReference) o;
    return Objects.equals(getTopic(), that.getTopic()) && Objects.equals(getSubtopic(),
      that.getSubtopic()) && Objects.equals(getUri(), that.getUri()) && Objects.equals(
      getTimestamp(), that.getTimestamp());
  }

  @Override
  @JacocoGenerated
  public int hashCode() {
    return Objects.hash(getTopic(), getSubtopic(), getUri(), getTimestamp());
  }

}