/**
 * 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.hadoop.hive.metastore;

import java.io.IOException;
import java.net.ServerSocket;
import java.util.concurrent.TimeUnit;

import junit.framework.TestCase;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.conf.HiveConf.ConfVars;
import org.apache.hadoop.hive.metastore.api.Database;
import org.apache.hadoop.hive.metastore.api.MetaException;
import org.apache.hadoop.hive.metastore.api.NoSuchObjectException;
import org.apache.hadoop.hive.shims.ShimLoader;


public class TestMetaStoreAuthorization extends TestCase {
  protected HiveConf conf = new HiveConf();

  private int port;

  public void setup() throws Exception {
    port = findFreePort();
    System.setProperty(HiveConf.ConfVars.METASTORE_AUTHORIZATION_STORAGE_AUTH_CHECKS.varname,
        "true");
    conf.setVar(HiveConf.ConfVars.METASTOREURIS, "thrift://localhost:" + port);
    conf.setIntVar(HiveConf.ConfVars.METASTORETHRIFTCONNECTIONRETRIES, 3);
    conf.setTimeVar(ConfVars.METASTORE_CLIENT_CONNECT_RETRY_DELAY, 60, TimeUnit.SECONDS);
  }

  public void testIsWritable() throws Exception {
    setup();
    conf = new HiveConf(this.getClass());
    String testDir = System.getProperty("test.warehouse.dir", "/tmp");
    Path testDirPath = new Path(testDir);
    FileSystem fs = testDirPath.getFileSystem(conf);
    Path top = new Path(testDirPath, "_foobarbaz12_");
    try {
      fs.mkdirs(top);

      Warehouse wh = new Warehouse(conf);
      FsPermission writePerm = FsPermission.createImmutable((short)0777);
      FsPermission noWritePerm = FsPermission.createImmutable((short)0555);

      fs.setPermission(top, writePerm);
      assertTrue("Expected " + top + " to be writable", wh.isWritable(top));

      fs.setPermission(top, noWritePerm);
      assertTrue("Expected " + top + " to be not writable", !wh.isWritable(top));
    } finally {
      fs.delete(top, true);
    }
  }

  public void testMetaStoreAuthorization() throws Exception {
    setup();
    MetaStoreUtils.startMetaStore(port, ShimLoader.getHadoopThriftAuthBridge());
    HiveMetaStoreClient client = new HiveMetaStoreClient(conf);

    FileSystem fs = null;
    String dbName = "simpdb";
    Database db1 = null;
    Path p = null;
    try {
      try {
        db1 = client.getDatabase(dbName);
        client.dropDatabase(dbName);
      } catch (NoSuchObjectException noe) {}
      if (db1 != null) {
        p = new Path(db1.getLocationUri());
        fs = p.getFileSystem(conf);
        fs.delete(p, true);
      }
      db1 = new Database();
      db1.setName(dbName);
      client.createDatabase(db1);
      Database db = client.getDatabase(dbName);

      assertTrue("Databases do not match", db1.getName().equals(db.getName()));
      p = new Path(db.getLocationUri());
      if (fs == null) {
        fs = p.getFileSystem(conf);
      }
      fs.setPermission(p.getParent(), FsPermission.createImmutable((short)0555));
      try {
        client.dropDatabase(dbName);
        throw new Exception("Expected dropDatabase call to fail");
      } catch (MetaException me) {
      }
      fs.setPermission(p.getParent(), FsPermission.createImmutable((short)0755));
      client.dropDatabase(dbName);
    } finally {
      if (p != null) {
        fs.delete(p, true);
      }
    }
  }

  private int findFreePort() throws IOException {
    ServerSocket socket= new ServerSocket(0);
    int port = socket.getLocalPort();
    socket.close();
    return port;
  }
}