/*
 * 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.phoenix.end2end;

import static org.apache.phoenix.util.TestUtil.TEST_PROPERTIES;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.UUID;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.client.Table;
import org.apache.phoenix.jdbc.PhoenixConnection;
import org.apache.phoenix.mapreduce.index.IndexTool;
import org.apache.phoenix.query.ConnectionQueryServices;
import org.apache.phoenix.query.QueryServices;
import org.apache.phoenix.query.QueryServicesOptions;
import org.apache.phoenix.schema.PTable;
import org.apache.phoenix.util.PropertiesUtil;
import org.apache.phoenix.util.ReadOnlyProps;
import org.apache.phoenix.util.SchemaUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import org.apache.phoenix.thirdparty.com.google.common.collect.Lists;
import org.apache.phoenix.thirdparty.com.google.common.collect.Maps;

@Category(ParallelStatsDisabledTest.class)
public class IndexToolForDeleteBeforeRebuildIT extends ParallelStatsDisabledIT {
  private Connection conn;
  private String dataTableName;
  private String schemaName;
  private String dataTableFullName;
  private String viewName;
  private String viewFullName;
  private String globalIndexName;
  private String globalIndexFullName;

  private static final String DATA_TABLE_DDL =
    "CREATE TABLE %s (TENANT_ID VARCHAR(15) NOT NULL, ID INTEGER NOT NULL, NAME VARCHAR"
      + ", ZIP INTEGER, EMPLOYER VARCHAR , CONSTRAINT PK_1 PRIMARY KEY (TENANT_ID, ID)) MULTI_TENANT=true";
  private static final String VIEW_DDL = "CREATE VIEW %s AS  SELECT * FROM %s";
  private static final String INDEX_GLOBAL_DDL =
    "CREATE INDEX %s ON %s (ID, NAME, ZIP) INCLUDE (EMPLOYER)";
  private static final String INDEX_LOCAL_DDL = "CREATE LOCAL INDEX %s ON %s (ZIP) INCLUDE (NAME)";
  private static final String UPSERT_SQL = "UPSERT INTO %s VALUES(?,?,?,?)";

  @BeforeClass
  public static synchronized void setup() throws Exception {
    Map<String, String> serverProps = Maps.newHashMapWithExpectedSize(3);
    serverProps.put(QueryServices.STATS_GUIDEPOST_WIDTH_BYTES_ATTRIB, Long.toString(20));
    serverProps.put(QueryServices.MAX_SERVER_METADATA_CACHE_TIME_TO_LIVE_MS_ATTRIB,
      Long.toString(5));
    serverProps.put(QueryServices.EXTRA_JDBC_ARGUMENTS_ATTRIB,
      QueryServicesOptions.DEFAULT_EXTRA_JDBC_ARGUMENTS);
    Map<String, String> clientProps = Maps.newHashMapWithExpectedSize(4);
    clientProps.put(QueryServices.USE_STATS_FOR_PARALLELIZATION, Boolean.toString(true));
    clientProps.put(QueryServices.STATS_UPDATE_FREQ_MS_ATTRIB, Long.toString(5));
    clientProps.put(QueryServices.TRANSACTIONS_ENABLED, Boolean.TRUE.toString());
    clientProps.put(QueryServices.FORCE_ROW_KEY_ORDER_ATTRIB, Boolean.TRUE.toString());
    setUpTestDriver(new ReadOnlyProps(serverProps.entrySet().iterator()),
      new ReadOnlyProps(clientProps.entrySet().iterator()));
  }

  @Before
  public void prepareTest() throws Exception {
    Properties props = PropertiesUtil.deepCopy(TEST_PROPERTIES);
    conn = DriverManager.getConnection(getUrl(), props);

    schemaName = generateUniqueName();
    dataTableName = generateUniqueName();
    viewName = generateUniqueName();
    dataTableFullName = SchemaUtil.getTableName(schemaName, dataTableName);
    viewFullName = SchemaUtil.getTableName(schemaName, viewName);
    globalIndexName = "GLBL_IDX_" + generateUniqueName();
    globalIndexFullName = SchemaUtil.getTableName(schemaName, globalIndexName);
    createTestTable(getUrl(), String.format(DATA_TABLE_DDL, dataTableFullName));
    createTestTable(getUrl(), String.format(VIEW_DDL, viewFullName, dataTableFullName));
    String dataTableUpsert = String.format(UPSERT_SQL, dataTableFullName);
    PreparedStatement stmt = conn.prepareStatement(dataTableUpsert);
    for (int i = 1; i < 4; i++) {
      upsertRow(stmt, "tenantID1", i, "name" + i, 9990 + i);
    }
    conn.commit();
  }

  private void upsertRow(PreparedStatement stmt, String tenantId, int id, String name, int zip)
    throws SQLException {
    int index = 1;
    stmt.setString(index++, tenantId);
    stmt.setInt(index++, id);
    stmt.setString(index++, name);
    stmt.setInt(index++, zip);
    stmt.executeUpdate();
  }

  @After
  public void teardown() throws Exception {
    if (conn != null) {
      boolean refCountLeaked = isAnyStoreRefCountLeaked();
      conn.close();
      assertFalse("refCount leaked", refCountLeaked);
    }
  }

  @Test
  /**
   * IndexTool should return -1 for View Indexes because view indexes share the same table.
   */
  public void testDeleteBeforeRebuildForViewIndexShouldFail() throws Exception {
    String createViewIndex = String.format(INDEX_GLOBAL_DDL, globalIndexName, viewFullName);
    PreparedStatement stmt = conn.prepareStatement(createViewIndex);
    stmt.execute();
    runIndexTool(schemaName, viewName, globalIndexName, -1);
  }

  @Test
  /**
   * Test delete before rebuild
   */
  public void testDeleteBeforeRebuildForGlobalIndex() throws Exception {
    conn.createStatement()
      .execute(String.format(INDEX_GLOBAL_DDL, globalIndexName, dataTableFullName));
    String globalIndexUpsert = String.format(UPSERT_SQL, globalIndexFullName);
    PreparedStatement stmt = conn.prepareStatement(globalIndexUpsert);
    upsertRow(stmt, "tenantID1", 11, "name11", 99911);
    conn.commit();

    ConnectionQueryServices queryServices = conn.unwrap(PhoenixConnection.class).getQueryServices();
    PTable physicalTable = conn.unwrap(PhoenixConnection.class).getTable(globalIndexFullName);
    Table hIndexTable = queryServices.getTable(physicalTable.getPhysicalName().getBytes());
    int count = getUtility().countRows(hIndexTable);
    // Confirm index has rows.
    assertEquals(4, count);

    runIndexTool(schemaName, dataTableName, globalIndexName, 0);

    count = getUtility().countRows(hIndexTable);

    // Confirm index has all the data rows
    assertEquals(3, count);
  }

  @Test
  /**
   * For local indexes the data is on the same row and all local indexes share the same column
   * family So, it should return -1 for local indexes.
   */
  public void testDeleteBeforeRebuildForLocalIndexShouldFail() throws Exception {
    String localIndexName = generateUniqueName();
    conn.createStatement()
      .execute(String.format(INDEX_LOCAL_DDL, localIndexName, dataTableFullName));
    conn.commit();

    runIndexTool(schemaName, dataTableName, localIndexName, -1);
  }

  public static String[] getArgValues(String schemaName, String dataTable, String indxTable) {
    final List<String> args = Lists.newArrayList();
    if (schemaName != null) {
      args.add("-s");
      args.add(schemaName);
    }
    args.add("-dt");
    args.add(dataTable);
    args.add("-it");
    args.add(indxTable);

    args.add("-direct");
    // Need to run this job in foreground for the test to be deterministic
    args.add("-runfg");

    args.add("-deleteall");

    args.add("-op");
    args.add("/tmp/" + UUID.randomUUID().toString());
    return args.toArray(new String[0]);
  }

  public static void runIndexTool(String schemaName, String dataTableName, String indexTableName,
    int expectedStatus, String... additionalArgs) throws Exception {
    IndexTool indexingTool = new IndexTool();
    Configuration conf = new Configuration(getUtility().getConfiguration());
    conf.set(QueryServices.TRANSACTIONS_ENABLED, Boolean.TRUE.toString());
    indexingTool.setConf(conf);
    final String[] cmdArgs = getArgValues(schemaName, dataTableName, indexTableName);
    List<String> cmdArgList = new ArrayList<>(Arrays.asList(cmdArgs));
    cmdArgList.addAll(Arrays.asList(additionalArgs));
    int status = indexingTool.run(cmdArgList.toArray(new String[cmdArgList.size()]));

    assertEquals(expectedStatus, status);
  }
}
