/*
 * 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.hadoop.hbase.client.trace.hamcrest;

import static org.apache.hadoop.hbase.client.trace.hamcrest.AttributesMatchers.containsEntry;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.is;

import io.opentelemetry.api.common.Attributes;
import io.opentelemetry.api.trace.SpanKind;
import io.opentelemetry.api.trace.StatusCode;
import io.opentelemetry.sdk.trace.data.EventData;
import io.opentelemetry.sdk.trace.data.SpanData;
import io.opentelemetry.semconv.trace.attributes.SemanticAttributes;
import java.time.Duration;
import java.util.Objects;
import org.hamcrest.Description;
import org.hamcrest.FeatureMatcher;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;

/**
 * Helper methods for matching against instances of {@link SpanData}.
 */
public final class SpanDataMatchers {

  private SpanDataMatchers() {
  }

  public static Matcher<SpanData> hasAttributes(Matcher<Attributes> matcher) {
    return new FeatureMatcher<SpanData, Attributes>(matcher, "SpanData having attributes that ",
      "attributes") {
      @Override
      protected Attributes featureValueOf(SpanData item) {
        return item.getAttributes();
      }
    };
  }

  public static Matcher<SpanData> hasDuration(Matcher<Duration> matcher) {
    return new FeatureMatcher<SpanData, Duration>(matcher, "SpanData having duration that ",
      "duration") {
      @Override
      protected Duration featureValueOf(SpanData item) {
        return Duration.ofNanos(item.getEndEpochNanos() - item.getStartEpochNanos());
      }
    };
  }

  public static Matcher<SpanData> hasEnded() {
    return new TypeSafeMatcher<SpanData>() {
      @Override
      protected boolean matchesSafely(SpanData item) {
        return item.hasEnded();
      }

      @Override
      public void describeTo(Description description) {
        description.appendText("SpanData that hasEnded");
      }
    };
  }

  public static Matcher<SpanData> hasEvents(Matcher<Iterable<? super EventData>> matcher) {
    return new FeatureMatcher<SpanData, Iterable<? super EventData>>(matcher,
      "SpanData having events that", "events") {
      @Override
      protected Iterable<? super EventData> featureValueOf(SpanData item) {
        return item.getEvents();
      }
    };
  }

  public static Matcher<SpanData> hasExceptionWithType(Matcher<? super String> matcher) {
    return hasException(containsEntry(is(SemanticAttributes.EXCEPTION_TYPE), matcher));
  }

  public static Matcher<SpanData> hasException(Matcher<? super Attributes> matcher) {
    return new FeatureMatcher<SpanData, Attributes>(matcher,
      "SpanData having Exception with Attributes that", "exception attributes") {
      @Override
      protected Attributes featureValueOf(SpanData actual) {
        return actual.getEvents().stream()
          .filter(e -> Objects.equals(SemanticAttributes.EXCEPTION_EVENT_NAME, e.getName()))
          .map(EventData::getAttributes).findFirst().orElse(null);
      }
    };
  }

  public static Matcher<SpanData> hasKind(SpanKind kind) {
    return new FeatureMatcher<SpanData, SpanKind>(equalTo(kind), "SpanData with kind that",
      "SpanKind") {
      @Override
      protected SpanKind featureValueOf(SpanData item) {
        return item.getKind();
      }
    };
  }

  public static Matcher<SpanData> hasName(String name) {
    return hasName(equalTo(name));
  }

  public static Matcher<SpanData> hasName(Matcher<String> matcher) {
    return new FeatureMatcher<SpanData, String>(matcher, "SpanKind with a name that", "name") {
      @Override
      protected String featureValueOf(SpanData item) {
        return item.getName();
      }
    };
  }

  public static Matcher<SpanData> hasParentSpanId(String parentSpanId) {
    return hasParentSpanId(equalTo(parentSpanId));
  }

  public static Matcher<SpanData> hasParentSpanId(SpanData parent) {
    return hasParentSpanId(parent.getSpanId());
  }

  public static Matcher<SpanData> hasParentSpanId(Matcher<String> matcher) {
    return new FeatureMatcher<SpanData, String>(matcher, "SpanKind with a parentSpanId that",
      "parentSpanId") {
      @Override
      protected String featureValueOf(SpanData item) {
        return item.getParentSpanId();
      }
    };
  }

  public static Matcher<SpanData> hasStatusWithCode(Matcher<StatusCode> matcher) {
    return new FeatureMatcher<SpanData, StatusCode>(matcher, "SpanData with StatusCode that",
      "statusWithCode") {
      @Override
      protected StatusCode featureValueOf(SpanData actual) {
        return actual.getStatus().getStatusCode();
      }
    };
  }

  public static Matcher<SpanData> hasStatusWithCode(StatusCode statusCode) {
    return hasStatusWithCode(is(equalTo(statusCode)));
  }

  public static Matcher<SpanData> hasTraceId(String traceId) {
    return hasTraceId(is(equalTo(traceId)));
  }

  public static Matcher<SpanData> hasTraceId(Matcher<String> matcher) {
    return new FeatureMatcher<SpanData, String>(matcher, "SpanData with a traceId that ",
      "traceId") {
      @Override
      protected String featureValueOf(SpanData item) {
        return item.getTraceId();
      }
    };
  }
}