// Copyright 2017 The Nomulus Authors. All Rights Reserved.
//
// 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 google.registry.testing;

import static com.google.common.truth.Truth.assertAbout;
import static com.google.common.truth.Truth.assertThat;
import static google.registry.model.eppcommon.EppXmlTransformer.marshal;

import com.google.common.truth.FailureMetadata;
import com.google.common.truth.SimpleSubjectBuilder;
import com.google.common.truth.Subject;
import google.registry.flows.EppException;
import google.registry.model.eppcommon.Trid;
import google.registry.model.eppoutput.EppOutput;
import google.registry.model.eppoutput.EppResponse;
import google.registry.testing.TruthChainer.And;
import google.registry.xml.ValidationMode;
import google.registry.xml.XmlException;

/** Utility methods for asserting things about {@link EppException} instances. */
public class EppExceptionSubject extends Subject {

  private final EppException actual;

  public EppExceptionSubject(FailureMetadata failureMetadata, EppException subject) {
    super(failureMetadata, subject);
    this.actual = subject;
  }

  public And<EppExceptionSubject> hasMessage(String expected) {
    assertThat(actual).hasMessageThat().isEqualTo(expected);
    return new And<>(this);
  }

  public And<EppExceptionSubject> hasMessageThatContains(String expected) {
    assertThat(actual).hasMessageThat().contains(expected);
    return new And<>(this);
  }

  public And<EppExceptionSubject> marshalsToXml() {
    // Attempt to marshal the exception to EPP. If it doesn't work, this will throw.
    try {
      marshal(
          EppOutput.create(
              new EppResponse.Builder()
                  .setTrid(Trid.create(null, "server-trid"))
                  .setResult(actual.getResult())
                  .build()),
          ValidationMode.STRICT);
    } catch (XmlException e) {
      failWithActual("expected to marshal to XML, but failed with exception", e.getMessage());
    }
    return new And<>(this);
  }

  public static SimpleSubjectBuilder<EppExceptionSubject, EppException> assertAboutEppExceptions() {
    return assertAbout(EppExceptionSubject::new);
  }
}
