// Copyright (C) 2020 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.plugins.codeowners.backend;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

import com.google.gerrit.acceptance.config.GerritConfig;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.extensions.registration.DynamicMap;
import com.google.gerrit.extensions.registration.PrivateInternals_DynamicMapImpl;
import com.google.gerrit.extensions.registration.RegistrationHandle;
import com.google.gerrit.plugins.codeowners.acceptance.AbstractCodeOwnersTest;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.ServerInitiated;
import com.google.gerrit.server.UserInitiated;
import com.google.inject.Inject;
import com.google.inject.Key;
import com.google.inject.Provider;
import com.google.inject.util.Providers;
import org.junit.Before;
import org.junit.Test;

/** Tests for {@link CodeOwnersUpdate}. */
public class CodeOwnersUpdateTest extends AbstractCodeOwnersTest {
  @Inject private Provider<IdentifiedUser> currentUserProvider;

  private Provider<CodeOwnersUpdate> userInitiatedCodeOwnersUpdate;
  private Provider<CodeOwnersUpdate> serverInitiatedCodeOwnersUpdate;
  private DynamicMap<CodeOwnerBackend> codeOwnerBackends;

  @Before
  public void setUpCodeOwnersPlugin() throws Exception {
    userInitiatedCodeOwnersUpdate =
        plugin
            .getSysInjector()
            .getInstance(new Key<Provider<CodeOwnersUpdate>>(UserInitiated.class) {});
    serverInitiatedCodeOwnersUpdate =
        plugin
            .getSysInjector()
            .getInstance(new Key<Provider<CodeOwnersUpdate>>(ServerInitiated.class) {});
    codeOwnerBackends =
        plugin.getSysInjector().getInstance(new Key<DynamicMap<CodeOwnerBackend>>() {});
  }

  @Test
  @GerritConfig(name = "plugin.code-owners.backend", value = "test-backend")
  public void codeOwnerUpdateIsForwardedToConfiguredBackendUserInitiated() throws Exception {
    testCodeOwnerUpdateIsForwardedToConfiguredBackend(
        userInitiatedCodeOwnersUpdate.get(), currentUserProvider.get());
  }

  @Test
  @GerritConfig(name = "plugin.code-owners.backend", value = "test-backend")
  public void codeOwnerUpdateIsForwardedToConfiguredBackendServerInitiated() throws Exception {
    testCodeOwnerUpdateIsForwardedToConfiguredBackend(
        serverInitiatedCodeOwnersUpdate.get(), /* currentUser= */ null);
  }

  private void testCodeOwnerUpdateIsForwardedToConfiguredBackend(
      CodeOwnersUpdate codeOwnersUpdate, @Nullable IdentifiedUser currentUser) throws Exception {
    CodeOwnerConfig.Key codeOwnerConfigKey = CodeOwnerConfig.Key.create(project, "master", "/");
    CodeOwnerConfigUpdate codeOwnerConfigUpdate =
        CodeOwnerConfigUpdate.builder()
            .setCodeOwnerSetsModification(
                CodeOwnerSetModification.append(
                    CodeOwnerSet.createWithoutPathExpressions(admin.email())))
            .build();
    CodeOwnerBackend codeOwnerBackendMock = mock(CodeOwnerBackend.class);
    try (AutoCloseable registration = registerTestBackend("test-backend", codeOwnerBackendMock)) {
      codeOwnersUpdate.upsertCodeOwnerConfig(codeOwnerConfigKey, codeOwnerConfigUpdate);
      verify(codeOwnerBackendMock)
          .upsertCodeOwnerConfig(codeOwnerConfigKey, codeOwnerConfigUpdate, currentUser);
    }
  }

  private AutoCloseable registerTestBackend(String id, CodeOwnerBackend codeOwnerBackend) {
    RegistrationHandle registrationHandle =
        ((PrivateInternals_DynamicMapImpl<CodeOwnerBackend>) codeOwnerBackends)
            .put("gerrit", id, Providers.of(codeOwnerBackend));
    return registrationHandle::remove;
  }
}