// Copyright (C) 2018 The Android Open Source Project
//
// 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.google.gerrit.acceptance.api.change;

import static com.google.common.truth.Truth.assertThat;

import com.google.common.collect.ImmutableList;
import com.google.gerrit.acceptance.AbstractDaemonTest;
import com.google.gerrit.acceptance.PushOneCommit;
import com.google.gerrit.common.data.SubmitRecord;
import com.google.gerrit.common.data.SubmitRequirement;
import com.google.gerrit.extensions.annotations.Exports;
import com.google.gerrit.extensions.common.ChangeInfo;
import com.google.gerrit.extensions.common.SubmitRequirementInfo;
import com.google.gerrit.extensions.config.FactoryModule;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gerrit.server.rules.SubmitRule;
import com.google.inject.Inject;
import com.google.inject.Module;
import com.google.inject.Singleton;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicBoolean;
import org.junit.Test;

public class ChangeSubmitRequirementIT extends AbstractDaemonTest {
  private static final SubmitRequirement req =
      SubmitRequirement.builder().setType("custom_rule").setFallbackText("Fallback text").build();
  private static final SubmitRequirementInfo reqInfo =
      new SubmitRequirementInfo("NOT_READY", "Fallback text", "custom_rule");

  @Override
  public Module createModule() {
    return new FactoryModule() {
      @Override
      public void configure() {
        bind(SubmitRule.class)
            .annotatedWith(Exports.named("CustomSubmitRule"))
            .to(CustomSubmitRule.class);
      }
    };
  }

  @Inject CustomSubmitRule rule;

  @Test
  public void submitRequirementIsPropagated() throws Exception {
    rule.block(false);
    PushOneCommit.Result r = createChange();

    ChangeInfo result = gApi.changes().id(r.getChangeId()).get();
    assertThat(result.requirements).isEmpty();

    rule.block(true);
    result = gApi.changes().id(r.getChangeId()).get();
    assertThat(result.requirements).containsExactly(reqInfo);
  }

  @Test
  public void submitRequirementIsPropagatedInQuery() throws Exception {
    rule.block(false);
    PushOneCommit.Result r = createChange();

    String query = "status:open project:" + project.get();
    List<ChangeInfo> result = gApi.changes().query(query).get();
    assertThat(result).hasSize(1);
    assertThat(result.get(0).requirements).isEmpty();

    // Submit rule behavior is changed, but the query still returns
    // the previous result from the index
    rule.block(true);
    result = gApi.changes().query(query).get();
    assertThat(result).hasSize(1);
    assertThat(result.get(0).requirements).isEmpty();

    // The submit rule result is updated after the change is reindexed
    gApi.changes().id(r.getChangeId()).index();
    result = gApi.changes().query(query).get();
    assertThat(result).hasSize(1);
    assertThat(result.get(0).requirements).containsExactly(reqInfo);
  }

  @Singleton
  private static class CustomSubmitRule implements SubmitRule {
    private final AtomicBoolean block = new AtomicBoolean(true);

    public void block(boolean block) {
      this.block.set(block);
    }

    @Override
    public Optional<SubmitRecord> evaluate(ChangeData changeData) {
      if (block.get()) {
        SubmitRecord record = new SubmitRecord();
        record.labels = new ArrayList<>();
        record.status = SubmitRecord.Status.NOT_READY;
        record.requirements = ImmutableList.of(req);
        return Optional.of(record);
      }
      return Optional.empty();
    }
  }
}