// Copyright (C) 2014 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.server.project;

import static com.google.common.truth.Truth.assertThat;
import static com.google.gerrit.server.group.SystemGroupBackend.ANONYMOUS_USERS;
import static com.google.gerrit.server.project.Util.category;
import static com.google.gerrit.server.project.Util.value;

import com.google.gerrit.acceptance.AbstractDaemonTest;
import com.google.gerrit.acceptance.NoHttpd;
import com.google.gerrit.acceptance.PushOneCommit;
import com.google.gerrit.common.data.LabelType;
import com.google.gerrit.common.data.Permission;
import com.google.gerrit.extensions.api.changes.AddReviewerInput;
import com.google.gerrit.extensions.api.changes.ReviewInput;
import com.google.gerrit.extensions.client.ListChangesOption;
import com.google.gerrit.extensions.common.ChangeInfo;
import com.google.gerrit.extensions.common.LabelInfo;
import com.google.gerrit.extensions.events.CommentAddedListener;
import com.google.gerrit.extensions.registration.DynamicSet;
import com.google.gerrit.extensions.registration.RegistrationHandle;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.reviewdb.client.AccountGroup;
import com.google.gerrit.server.git.ProjectConfig;
import com.google.gerrit.server.project.Util;
import com.google.inject.Inject;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

@NoHttpd
public class CustomLabelIT extends AbstractDaemonTest {

  @Inject private DynamicSet<CommentAddedListener> source;

  private final LabelType label =
      category("CustomLabel", value(1, "Positive"), value(0, "No score"), value(-1, "Negative"));

  private final LabelType P = category("CustomLabel2", value(1, "Positive"), value(0, "No score"));

  private RegistrationHandle eventListenerRegistration;
  private CommentAddedListener.Event lastCommentAddedEvent;

  @Before
  public void setUp() throws Exception {
    ProjectConfig cfg = projectCache.checkedGet(project).getConfig();
    AccountGroup.UUID anonymousUsers = systemGroupBackend.getGroup(ANONYMOUS_USERS).getUUID();
    Util.allow(cfg, Permission.forLabel(label.getName()), -1, 1, anonymousUsers, "refs/heads/*");
    Util.allow(cfg, Permission.forLabel(P.getName()), 0, 1, anonymousUsers, "refs/heads/*");
    saveProjectConfig(project, cfg);

    eventListenerRegistration =
        source.add(
            new CommentAddedListener() {
              @Override
              public void onCommentAdded(Event event) {
                lastCommentAddedEvent = event;
              }
            });
  }

  @After
  public void cleanup() {
    eventListenerRegistration.remove();
    db.close();
  }

  @Test
  public void customLabelNoOp_NegativeVoteNotBlock() throws Exception {
    label.setFunctionName("NoOp");
    saveLabelConfig();
    PushOneCommit.Result r = createChange();
    revision(r).review(new ReviewInput().label(label.getName(), -1));
    ChangeInfo c = get(r.getChangeId());
    LabelInfo q = c.labels.get(label.getName());
    assertThat(q.all).hasSize(1);
    assertThat(q.rejected).isNotNull();
    assertThat(q.blocking).isNull();
  }

  @Test
  public void customLabelNoBlock_NegativeVoteNotBlock() throws Exception {
    label.setFunctionName("NoBlock");
    saveLabelConfig();
    PushOneCommit.Result r = createChange();
    revision(r).review(new ReviewInput().label(label.getName(), -1));
    ChangeInfo c = get(r.getChangeId());
    LabelInfo q = c.labels.get(label.getName());
    assertThat(q.all).hasSize(1);
    assertThat(q.rejected).isNotNull();
    assertThat(q.blocking).isNull();
  }

  @Test
  public void customLabelMaxNoBlock_NegativeVoteNotBlock() throws Exception {
    label.setFunctionName("MaxNoBlock");
    saveLabelConfig();
    PushOneCommit.Result r = createChange();
    revision(r).review(new ReviewInput().label(label.getName(), -1));
    ChangeInfo c = get(r.getChangeId());
    LabelInfo q = c.labels.get(label.getName());
    assertThat(q.all).hasSize(1);
    assertThat(q.rejected).isNotNull();
    assertThat(q.blocking).isNull();
  }

  @Test
  public void customLabelAnyWithBlock_NegativeVoteBlock() throws Exception {
    label.setFunctionName("AnyWithBlock");
    saveLabelConfig();
    PushOneCommit.Result r = createChange();
    revision(r).review(new ReviewInput().label(label.getName(), -1));
    ChangeInfo c = get(r.getChangeId());
    LabelInfo q = c.labels.get(label.getName());
    assertThat(q.all).hasSize(1);
    assertThat(q.disliked).isNull();
    assertThat(q.rejected).isNotNull();
    assertThat(q.blocking).isTrue();
  }

  @Test
  public void customLabelAnyWithBlock_Addreviewer_ZeroVote() throws Exception {
    P.setFunctionName("AnyWithBlock");
    saveLabelConfig();
    PushOneCommit.Result r = createChange();
    AddReviewerInput in = new AddReviewerInput();
    in.reviewer = user.email;
    gApi.changes().id(r.getChangeId()).addReviewer(in);

    ReviewInput input = new ReviewInput().label(P.getName(), 0);
    input.message = "foo";

    revision(r).review(input);
    ChangeInfo c = get(r.getChangeId());
    LabelInfo q = c.labels.get(P.getName());
    assertThat(q.all).hasSize(2);
    assertThat(q.disliked).isNull();
    assertThat(q.rejected).isNull();
    assertThat(q.blocking).isNull();
    assertThat(lastCommentAddedEvent.getComment()).isEqualTo("Patch Set 1:\n\n" + input.message);
  }

  @Test
  public void customLabelMaxWithBlock_NegativeVoteBlock() throws Exception {
    saveLabelConfig();
    PushOneCommit.Result r = createChange();
    revision(r).review(new ReviewInput().label(label.getName(), -1));
    ChangeInfo c = get(r.getChangeId());
    LabelInfo q = c.labels.get(label.getName());
    assertThat(q.all).hasSize(1);
    assertThat(q.disliked).isNull();
    assertThat(q.rejected).isNotNull();
    assertThat(q.blocking).isTrue();
  }

  @Test
  public void customLabel_DisallowPostSubmit() throws Exception {
    label.setFunctionName("NoOp");
    label.setAllowPostSubmit(false);
    P.setFunctionName("NoOp");
    saveLabelConfig();

    PushOneCommit.Result r = createChange();
    revision(r).review(ReviewInput.approve());
    revision(r).submit();

    ChangeInfo info = get(r.getChangeId(), ListChangesOption.DETAILED_LABELS);
    assertPermitted(info, "Code-Review", 2);
    assertPermitted(info, P.getName(), 0, 1);
    assertPermitted(info, label.getName());

    ReviewInput in = new ReviewInput();
    in.label(P.getName(), P.getMax().getValue());
    revision(r).review(in);

    in = new ReviewInput();
    in.label(label.getName(), label.getMax().getValue());
    exception.expect(ResourceConflictException.class);
    exception.expectMessage("Voting on labels disallowed after submit: " + label.getName());
    revision(r).review(in);
  }

  private void saveLabelConfig() throws Exception {
    ProjectConfig cfg = projectCache.checkedGet(project).getConfig();
    cfg.getLabelSections().put(label.getName(), label);
    cfg.getLabelSections().put(P.getName(), P);
    saveProjectConfig(project, cfg);
  }
}