/*
 * 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.sentry.tests.e2e.hive;

import org.apache.sentry.provider.file.PolicyFile;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.io.FileOutputStream;
import java.sql.Connection;
import java.sql.Statement;

import org.apache.hadoop.hive.conf.HiveConf;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

import com.google.common.io.Resources;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TestExportImportPrivileges extends AbstractTestWithStaticConfiguration {
  private static final Logger LOGGER = LoggerFactory.
          getLogger(TestExportImportPrivileges.class);
  private File dataFile;
  private PolicyFile policyFile;

  @BeforeClass
  public static void setupTestStaticConfiguration () throws Exception {
    LOGGER.info("TestExportImportPrivileges setupTestStaticConfiguration");
    AbstractTestWithStaticConfiguration.setupTestStaticConfiguration();
  }

  @Before
  public void setup() throws Exception {
    LOGGER.info("TestExportImportPrivileges setup");
    policyFile = super.setupPolicy();
    super.setup();
    dataFile = new File(dataDir, SINGLE_TYPE_DATA_FILE_NAME);
    FileOutputStream to = new FileOutputStream(dataFile);
    Resources.copy(Resources.getResource(SINGLE_TYPE_DATA_FILE_NAME), to);
    to.close();
  }

  @Test
  public void testInsertToDirPrivileges() throws Exception {
    Connection connection = null;
    Statement statement = null;
    String dumpDir = dfs.getBaseDir() + "/hive_data_dump";

    createDb(ADMIN1, DB1);
    createTable(ADMIN1, DB1, dataFile, TBL1);

    policyFile
            .addRolesToGroup(USERGROUP1, "db1_read", "db1_write", "data_dump")
            .addRolesToGroup(USERGROUP2, "db1_read", "db1_write")
            .addPermissionsToRole("db1_write", "server=server1->db=" + DB1 + "->table=" + TBL1 + "->action=INSERT")
            .addPermissionsToRole("db1_read", "server=server1->db=" + DB1 + "->table=" + TBL1 + "->action=SELECT")
            .addPermissionsToRole("data_dump", "server=server1->URI=" + dumpDir);
    writePolicyFile(policyFile);

    // Negative test, user2 doesn't have access to write to dir
    connection = context.createConnection(USER2_1);
    statement = context.createStatement(connection);
    exec(statement, "use " + DB1);
    context.assertAuthzException(statement, "INSERT OVERWRITE DIRECTORY '" + dumpDir + "' SELECT * FROM " + TBL1);
    statement.close();
    connection.close();

    // Negative test, user2 doesn't have access to dir that's similar to scratch dir
    String scratchLikeDir = context.getProperty(HiveConf.ConfVars.SCRATCHDIR.varname) + "_foo";
    dfs.assertCreateDir(scratchLikeDir);
    connection = context.createConnection(USER2_1);
    statement = context.createStatement(connection);
    exec(statement, "use " + DB1);
    context.assertAuthzException(statement, "INSERT OVERWRITE DIRECTORY '" + scratchLikeDir + "/bar' SELECT * FROM " + TBL1);
    statement.close();
    connection.close();

    // positive test, user1 has access to write to dir
    connection = context.createConnection(USER1_1);
    statement = context.createStatement(connection);
    exec(statement, "use " + DB1);
    assertTrue(statement.executeQuery("SELECT * FROM " + TBL1).next());
    exec(statement, "INSERT OVERWRITE DIRECTORY '" + dumpDir + "' SELECT * FROM " + TBL1);
  }

  @Test
  public void testExportImportPrivileges() throws Exception {
    Connection connection = null;
    Statement statement = null;
    String exportDir = dfs.getBaseDir() + "/hive_export1";
    LOGGER.info("exportDir = " + exportDir);
    createDb(ADMIN1, DB1);
    createTable(ADMIN1, DB1, dataFile, TBL1);

    policyFile
        .addRolesToGroup(USERGROUP1, "tab1_read", "tab1_write", "db1_all", "data_read", "data_export")
        .addRolesToGroup(USERGROUP2, "tab1_write", "tab1_read")
        .addRolesToGroup(USERGROUP3, "col1_read")
        .addPermissionsToRole("tab1_write", "server=server1->db=" + DB1 + "->table=" + TBL1 + "->action=INSERT")
        .addPermissionsToRole("tab1_read", "server=server1->db=" + DB1 + "->table=" + TBL1 + "->action=SELECT")
        .addPermissionsToRole("col1_read", "server=server1->db=" + DB1 + "->table=" + TBL1 + "->column=under_col->action=SELECT")
        .addPermissionsToRole("db1_all", "server=server1->db=" + DB1)
        .addPermissionsToRole("data_read", "server=server1->URI=file://" + dataFile.getPath())
        .addPermissionsToRole("data_export", "server=server1->URI=" + exportDir);
    writePolicyFile(policyFile);

    // Negative test, user2 doesn't have access to the file being loaded
    connection = context.createConnection(USER2_1);
    statement = context.createStatement(connection);
    exec(statement, "use " + DB1);
    context.assertAuthzException(statement, "EXPORT TABLE " + TBL1 + " TO '" + exportDir + "'");
    statement.close();
    connection.close();

    // Positive test, user1 have access to the target directory
    connection = context.createConnection(USER1_1);
    statement = context.createStatement(connection);
    exec(statement, "use " + DB1);
    // Import/Export works with s3 storage system only when this is turned on.
    exec(statement, "set hive.exim.uri.scheme.whitelist=hdfs,pfile,s3a;");
    exec(statement, "EXPORT TABLE " + TBL1 + " TO '" + exportDir + "'");
    statement.close();
    connection.close();

    // Negative test, user2 doesn't have access to the directory loading from
    connection = context.createConnection(USER2_1);
    statement = context.createStatement(connection);
    exec(statement, "use " + DB1);
    exec(statement, "set hive.exim.uri.scheme.whitelist=hdfs,pfile,s3a;");
    context.assertAuthzException(statement, "IMPORT TABLE " + TBL2 + " FROM '" + exportDir + "'");
    statement.close();
    connection.close();

    // Positive test, user1 have access to the target directory
    connection = context.createConnection(USER1_1);
    statement = context.createStatement(connection);
    exec(statement, "use " + DB1);
    exec(statement, "set hive.exim.uri.scheme.whitelist=hdfs,pfile,s3a;");
    exec(statement, "IMPORT TABLE " + TBL2 + " FROM '" + exportDir + "'");
    statement.close();
    connection.close();

    // Positive test, user3 have access to the target directory
    connection = context.createConnection(USER3_1);
    statement = context.createStatement(connection);
    exec(statement, "use " + DB1);
    exec(statement, "SELECT under_col FROM " + TBL1);
    statement.close();
    connection.close();
  }
}