/*
 * Copyright 2012-present Facebook, Inc.
 *
 * 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.facebook.buck.cli;

import static org.easymock.EasyMock.capture;
import static org.junit.Assert.assertEquals;

import com.facebook.buck.command.Project;
import com.facebook.buck.event.BuckEventBus;
import com.facebook.buck.parser.Parser;
import com.facebook.buck.rules.ArtifactCache;
import com.facebook.buck.rules.KnownBuildRuleTypes;
import com.facebook.buck.testutil.TestConsole;
import com.facebook.buck.util.BuckConstant;
import com.facebook.buck.util.ProjectFilesystem;
import com.facebook.buck.util.environment.Platform;

import org.easymock.Capture;
import org.easymock.EasyMockSupport;
import org.junit.Test;
import org.kohsuke.args4j.CmdLineException;

import java.io.IOException;

/**
 * Unit test for {@link CleanCommand}.
 */
public class CleanCommandTest extends EasyMockSupport {

  // TODO(mbolin): When it is possible to inject a mock object for stderr,
  // create a test that runs `buck clean unexpectedarg` and verify that the
  // exit code is 1 and that the appropriate error message is printed.

  @Test
  public void testCleanCommandNoArguments() throws CmdLineException, IOException {
    // Set up mocks.
    CleanCommand cleanCommand = createCommand();
    ProjectFilesystem projectFilesystem = cleanCommand.getProjectFilesystem();
    Capture<String> binDir = new Capture<>();
    projectFilesystem.rmdir(capture(binDir));
    Capture<String> genDir = new Capture<>();
    projectFilesystem.rmdir(capture(genDir));

    replayAll();

    // Simulate `buck clean`.
    CleanCommandOptions options = createOptionsFromArgs();
    int exitCode = cleanCommand.runCommandWithOptions(options);
    assertEquals(0, exitCode);
    assertEquals(BuckConstant.BIN_DIR, binDir.getValue());
    assertEquals(BuckConstant.GEN_DIR, genDir.getValue());

    verifyAll();
  }

  @Test
  public void testCleanCommandWithProjectArgument() throws CmdLineException, IOException {
    // Set up mocks.
    CleanCommand cleanCommand = createCommand();
    ProjectFilesystem projectFilesystem = cleanCommand.getProjectFilesystem();
    Capture<String> androidGenDir = new Capture<>();
    projectFilesystem.rmdir(capture(androidGenDir));
    Capture<String> annotationDir = new Capture<>();
    projectFilesystem.rmdir(capture(annotationDir));

    replayAll();

    // Simulate `buck clean --project`.
    CleanCommandOptions options = createOptionsFromArgs("--project");
    int exitCode = cleanCommand.runCommandWithOptions(options);
    assertEquals(0, exitCode);
    assertEquals(Project.ANDROID_GEN_DIR, androidGenDir.getValue());
    assertEquals(BuckConstant.ANNOTATION_DIR, annotationDir.getValue());

    verifyAll();
  }

  private CleanCommandOptions createOptionsFromArgs(String...args) throws CmdLineException {
    BuckConfig buckConfig = new FakeBuckConfig();
    CleanCommandOptions options = new CleanCommandOptions(buckConfig);
    new CmdLineParserAdditionalOptions(options).parseArgument(args);
    return options;
  }

  private CleanCommand createCommand() {
    CommandRunnerParams params = new CommandRunnerParams(
        new TestConsole(),
        createMock(ProjectFilesystem.class),
        createMock(KnownBuildRuleTypes.class),
        new InstanceArtifactCacheFactory(createMock(ArtifactCache.class)),
        createMock(BuckEventBus.class),
        createMock(Parser.class),
        Platform.detect());
    return new CleanCommand(params);
  }

}