/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.hive.ptest.execution;

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

import java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Executors;

import junit.framework.Assert;

import org.apache.hive.ptest.api.server.TestLogger;
import org.apache.hive.ptest.execution.conf.Host;
import org.apache.hive.ptest.execution.context.ExecutionContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.common.util.concurrent.MoreExecutors;

public abstract class AbstractTestPhase {

  private static final Logger LOG = LoggerFactory
      .getLogger(AbstractTestPhase.class);

  protected static final String LOCAL_DIR = "/some/local/dir";
  protected static final String WORKING_DIR = "/some/working/dir";
  protected static final String PRIVATE_KEY = "some.private.key";
  protected static final String USER = "someuser";
  protected static final String HOST = "somehost";
  protected static final int INSTANCE = 13;
  protected static final String INSTANCE_NAME = HOST + "-" + USER + "-" + INSTANCE;
  protected static final String INSTANCE_DIR =  LOCAL_DIR + "/" + INSTANCE_NAME;
  protected static final String BRANCH = "branch";
  protected static final String REPOSITORY = "repository";
  protected static final String REPOSITORY_NAME = "repositoryName";

  protected Host host;
  protected File baseDir;
  protected File scratchDir;
  protected File logDir;
  protected File succeededLogDir;
  protected File failedLogDir;
  protected ListeningExecutorService executor;
  protected MockLocalCommandFactory localCommandFactory;
  protected LocalCommand localCommand;
  protected MockSSHCommandExecutor sshCommandExecutor;
  protected MockRSyncCommandExecutor rsyncCommandExecutor;
  protected ImmutableMap<String, String> templateDefaults;
  protected ImmutableList<HostExecutor> hostExecutors;
  protected HostExecutor hostExecutor;
  protected ExecutionContext executionContext;
  protected HostExecutorBuilder hostExecutorBuilder;
  protected Logger logger;

  public void initialize(String name) throws Exception {
    baseDir = createBaseDir(name);
    logDir = Dirs.create(new File(baseDir, "logs"));
    scratchDir = Dirs.create(new File(baseDir, "scratch"));
    succeededLogDir = Dirs.create(new File(logDir, "succeeded"));
    failedLogDir = Dirs.create(new File(logDir, "failed"));
    executor = MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(2));
    executionContext = mock(ExecutionContext.class);
    hostExecutorBuilder = mock(HostExecutorBuilder.class);
    localCommandFactory = new MockLocalCommandFactory(LOG);
    localCommand = mock(LocalCommand.class);
    localCommandFactory.setInstance(localCommand);
    sshCommandExecutor = spy(new MockSSHCommandExecutor(LOG));
    rsyncCommandExecutor = spy(new MockRSyncCommandExecutor(LOG));
    logger = new TestLogger(System.err, TestLogger.LEVEL.TRACE);
    templateDefaults = ImmutableMap.<String, String>builder()
        .put("localDir", LOCAL_DIR)
        .put("workingDir", WORKING_DIR)
        .put("instanceName", INSTANCE_NAME)
        .put("branch", BRANCH)
        .put("logDir", logDir.getAbsolutePath())
        .put("repository", REPOSITORY)
        .put("repositoryName", REPOSITORY_NAME)
        .build();
    host = new Host(HOST, USER, new String[] { LOCAL_DIR }, 2);
  }

  protected void createHostExecutor() {
    hostExecutor = new HostExecutor(host, PRIVATE_KEY, executor, sshCommandExecutor,
        rsyncCommandExecutor, templateDefaults, scratchDir, succeededLogDir, failedLogDir, 1, true,
        logger);
    hostExecutors = ImmutableList.of(hostExecutor);
  }

  private static boolean isOSX() {
    String osName = System.getProperty("os.name");
    return osName.contains("OS X");
  }
  static File createBaseDir(String name) throws IOException {
    File baseDir;
    if(isOSX()) {
      // else osx gives ugly temp path which screws up approvals
      baseDir = new File("/tmp/hive-ptest-units", name);
    } else {
      baseDir = new File(new File(System.getProperty("java.io.tmpdir"), "hive-ptest-units"), name);
    }
    return Dirs.create(baseDir);
  }
  protected String getExecutedCommands() {
    List<String> result = Lists.newArrayList();
    result.addAll(returnNotNull(sshCommandExecutor.getCommands()));
    result.addAll(returnNotNull(localCommandFactory.getCommands()));
    result.addAll(returnNotNull(rsyncCommandExecutor.getCommands()));
    Collections.sort(result);
    return Joiner.on("\n").join(result);
  }
  static <V> V returnNotNull(V value) {
    Assert.assertNotNull(value);
    return value;
  }
}