/*
 * 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.iotdb.db.it.schema;

import org.apache.iotdb.it.env.ConfigFactory;
import org.apache.iotdb.it.env.EnvFactory;
import org.apache.iotdb.it.framework.IoTDBTestRunner;
import org.apache.iotdb.itbase.category.ClusterIT;

import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;

import static org.apache.iotdb.itbase.constant.TestConstant.TIMESTAMP_STR;
import static org.apache.iotdb.itbase.constant.TestConstant.count;
import static org.junit.Assert.fail;

@RunWith(IoTDBTestRunner.class)
@Category({ClusterIT.class})
public class IoTDBDeleteTimeseriesIT {

  private long memtableSizeThreshold;

  private Statement statement;
  private Connection connection;

  @Before
  public void setUp() throws Exception {
    memtableSizeThreshold = ConfigFactory.getConfig().getMemtableSizeThreshold();
    ConfigFactory.getConfig().setMemtableSizeThreshold(2);

    EnvFactory.getEnv().initBeforeTest();

    connection = EnvFactory.getEnv().getConnection();
    statement = connection.createStatement();
  }

  @After
  public void tearDown() throws Exception {
    statement.close();
    connection.close();
    EnvFactory.getEnv().cleanAfterTest();
    ConfigFactory.getConfig().setMemtableSizeThreshold(memtableSizeThreshold);
  }

  @Test
  public void deleteTimeseriesAndCreateDifferentTypeTest() throws Exception {
    String[] retArray = new String[] {"1,1,", "2,1.1,"};
    int cnt = 0;

    statement.execute(
        "create timeseries root.turbine1.d1.s1 with datatype=INT64, encoding=PLAIN, compression=SNAPPY");
    statement.execute(
        "create timeseries root.turbine1.d1.s2 with datatype=INT64, encoding=PLAIN, compression=SNAPPY");
    statement.execute("INSERT INTO root.turbine1.d1(timestamp,s1,s2) VALUES(1,1,2)");

    try (ResultSet resultSet = statement.executeQuery("SELECT s1 FROM root.turbine1.d1")) {
      ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
      while (resultSet.next()) {
        StringBuilder builder = new StringBuilder();
        for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
          builder.append(resultSet.getString(i)).append(",");
        }
        Assert.assertEquals(retArray[cnt], builder.toString());
        cnt++;
      }
    }
    statement.execute("DELETE timeseries root.turbine1.d1.s1");
    statement.execute(
        "create timeseries root.turbine1.d1.s1 with datatype=DOUBLE, encoding=PLAIN, compression=SNAPPY");
    statement.execute("INSERT INTO root.turbine1.d1(timestamp,s1) VALUES(2,1.1)");
    statement.execute("FLUSH");

    try (ResultSet resultSet = statement.executeQuery("SELECT s1 FROM root.turbine1.d1")) {
      ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
      while (resultSet.next()) {
        StringBuilder builder = new StringBuilder();
        for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
          builder.append(resultSet.getString(i)).append(",");
        }
        Assert.assertEquals(retArray[cnt], builder.toString());
        cnt++;
      }
    }

    //    EnvironmentUtils.restartDaemon();
    //
    //    try (Connection connection = EnvFactory.getEnv().getConnection();
    //        Statement statement = connection.createStatement()) {
    //      boolean hasResult = statement.execute("SELECT * FROM root.**");
    //      Assert.assertTrue(hasResult);
    //    }
  }

  @Test
  public void deleteTimeseriesAndCreateSameTypeTest() throws Exception {
    String[] retArray = new String[] {"1,1,", "2,5,"};
    int cnt = 0;

    statement.execute(
        "create timeseries root.turbine1.d1.s1 with datatype=INT64, encoding=PLAIN, compression=SNAPPY");
    statement.execute(
        "create timeseries root.turbine1.d1.s2 with datatype=INT64, encoding=PLAIN, compression=SNAPPY");
    statement.execute("INSERT INTO root.turbine1.d1(timestamp,s1,s2) VALUES(1,1,2)");

    try (ResultSet resultSet = statement.executeQuery("SELECT s1 FROM root.turbine1.d1")) {
      ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
      while (resultSet.next()) {
        StringBuilder builder = new StringBuilder();
        for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
          builder.append(resultSet.getString(i)).append(",");
        }
        Assert.assertEquals(retArray[cnt], builder.toString());
        cnt++;
      }
    }
    statement.execute("DELETE timeseries root.turbine1.d1.s1");
    statement.execute(
        "create timeseries root.turbine1.d1.s1 with datatype=INT64, encoding=PLAIN, compression=SNAPPY");
    statement.execute("INSERT INTO root.turbine1.d1(timestamp,s1) VALUES(2,5)");
    statement.execute("FLUSH");

    try (ResultSet resultSet = statement.executeQuery("SELECT s1 FROM root.turbine1.d1")) {
      ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
      while (resultSet.next()) {
        StringBuilder builder = new StringBuilder();
        for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
          builder.append(resultSet.getString(i)).append(",");
        }
        Assert.assertEquals(retArray[cnt], builder.toString());
        cnt++;
      }
    }

    //    EnvironmentUtils.restartDaemon();
    //
    //    try (Connection connection = EnvFactory.getEnv().getConnection();
    //        Statement statement = connection.createStatement()) {
    //      boolean hasResult = statement.execute("SELECT * FROM root.**");
    //      Assert.assertTrue(hasResult);
    //    }
  }

  @Test
  public void deleteTimeSeriesMultiIntervalTest() {
    String[] retArray1 = new String[] {"0,0"};

    try {
      String insertSql = "insert into root.sg.d1(time, s1) values(%d, %d)";
      for (int i = 1; i <= 4; i++) {
        statement.execute(String.format(insertSql, i, i));
      }
      statement.execute("flush");

      statement.execute("delete from root.sg.d1.s1 where time >= 1 and time <= 2");
      statement.execute("delete from root.sg.d1.s1 where time >= 3 and time <= 4");

      int cnt = 0;
      try (ResultSet resultSet =
          statement.executeQuery(
              "select count(s1) from root.sg.d1 where time >= 3 and time <= 4")) {
        while (resultSet.next()) {
          String ans =
              resultSet.getString(TIMESTAMP_STR)
                  + ","
                  + resultSet.getString(count("root.sg.d1.s1"));
          Assert.assertEquals(retArray1[cnt], ans);
          cnt++;
        }
        Assert.assertEquals(retArray1.length, cnt);
      }
    } catch (Exception e) {
      e.printStackTrace();
      fail(e.getMessage());
    }
  }

  @Test
  public void deleteTimeSeriesAndAutoDeleteDeviceTest() throws Exception {
    String[] retArray1 = new String[] {"0,4,4,4,4"};

    String insertSql = "insert into root.sg.d1(time, s1, s2, s3, s4) values(%d, %d, %d, %d, %d)";
    for (int i = 1; i <= 4; i++) {
      statement.execute(String.format(insertSql, i, i, i, i, i));
    }

    int cnt = 0;
    try (ResultSet resultSet =
        statement.executeQuery(
            "select count(s1), count(s2), count(s3), count(s4) from root.sg.d1")) {
      while (resultSet.next()) {
        StringBuilder ans = new StringBuilder(resultSet.getString(TIMESTAMP_STR));
        for (int i = 1; i <= 4; i++) {
          ans.append(",").append(resultSet.getString(count("root.sg.d1.s" + i)));
        }
        Assert.assertEquals(retArray1[cnt], ans.toString());
        cnt++;
      }
      Assert.assertEquals(retArray1.length, cnt);
    }

    statement.execute("delete timeseries root.sg.d1.*");
    try (ResultSet resultSet = statement.executeQuery("select * from root.sg.d1")) {
      Assert.assertFalse(resultSet.next());
    }

    try (ResultSet resultSet = statement.executeQuery("show timeseries root.sg.d1.*")) {
      Assert.assertFalse(resultSet.next());
    }

    try (ResultSet resultSet = statement.executeQuery("show devices root.sg.d1")) {
      Assert.assertFalse(resultSet.next());
    }
  }

  @Test
  public void deleteTimeSeriesCrossSchemaRegionTest() throws Exception {
    String[] retArray1 = new String[] {"0,4,4,4,4"};

    String insertSql = "insert into root.sg.d%d(time, s1, s2) values(%d, %d, %d)";
    for (int i = 1; i <= 4; i++) {
      for (int j = 1; j <= 4; j++) {
        statement.execute(String.format(insertSql, j, i, i, i));
      }
    }

    int cnt = 0;
    try (ResultSet resultSet = statement.executeQuery("select count(s1) from root.sg.*")) {
      while (resultSet.next()) {
        StringBuilder ans = new StringBuilder(resultSet.getString(TIMESTAMP_STR));
        for (int i = 1; i <= 4; i++) {
          ans.append(",").append(resultSet.getString(count("root.sg.d" + i + ".s1")));
        }
        Assert.assertEquals(retArray1[cnt], ans.toString());
        cnt++;
      }
      Assert.assertEquals(retArray1.length, cnt);
    }

    statement.execute("delete timeseries root.sg.*.s1");
    try (ResultSet resultSet = statement.executeQuery("select s1 from root.sg.*")) {
      Assert.assertFalse(resultSet.next());
    }

    try (ResultSet resultSet = statement.executeQuery("show timeseries root.sg.*.s1")) {
      Assert.assertFalse(resultSet.next());
    }

    cnt = 0;
    try (ResultSet resultSet = statement.executeQuery("select count(s2) from root.sg.*")) {
      while (resultSet.next()) {
        StringBuilder ans = new StringBuilder(resultSet.getString(TIMESTAMP_STR));
        for (int i = 1; i <= 4; i++) {
          ans.append(",").append(resultSet.getString(count("root.sg.d" + i + ".s2")));
        }
        Assert.assertEquals(retArray1[cnt], ans.toString());
        cnt++;
      }
      Assert.assertEquals(retArray1.length, cnt);
    }
  }

  @Test
  public void deleteTimeSeriesCrossStorageGroupTest() throws Exception {
    String[] retArray1 = new String[] {"0,4,4,4,4"};

    String insertSql = "insert into root.sg%d.d1(time, s1, s2) values(%d, %d, %d)";
    for (int i = 1; i <= 4; i++) {
      for (int j = 1; j <= 4; j++) {
        statement.execute(String.format(insertSql, j, i, i, i));
      }
    }

    int cnt = 0;
    try (ResultSet resultSet = statement.executeQuery("select count(s1) from root.*.d1")) {
      while (resultSet.next()) {
        StringBuilder ans = new StringBuilder(resultSet.getString(TIMESTAMP_STR));
        for (int i = 1; i <= 4; i++) {
          ans.append(",").append(resultSet.getString(count("root.sg" + i + ".d1.s1")));
        }
        Assert.assertEquals(retArray1[cnt], ans.toString());
        cnt++;
      }
      Assert.assertEquals(retArray1.length, cnt);
    }

    statement.execute("delete timeseries root.*.d1.s1");
    try (ResultSet resultSet = statement.executeQuery("select s1 from root.*.*")) {
      Assert.assertFalse(resultSet.next());
    }

    try (ResultSet resultSet = statement.executeQuery("show timeseries root.*.*.s1")) {
      Assert.assertFalse(resultSet.next());
    }

    cnt = 0;
    try (ResultSet resultSet = statement.executeQuery("select count(s2) from root.*.*")) {
      while (resultSet.next()) {
        StringBuilder ans = new StringBuilder(resultSet.getString(TIMESTAMP_STR));
        for (int i = 1; i <= 4; i++) {
          ans.append(",").append(resultSet.getString(count("root.sg" + i + ".d1.s2")));
        }
        Assert.assertEquals(retArray1[cnt], ans.toString());
        cnt++;
      }
      Assert.assertEquals(retArray1.length, cnt);
    }

    statement.execute("delete timeseries root.sg1.d1.s2, root.sg2.**");
    try (ResultSet resultSet = statement.executeQuery("select s2 from root.sg1.*")) {
      Assert.assertFalse(resultSet.next());
    }

    try (ResultSet resultSet = statement.executeQuery("show timeseries root.sg2.*.s2")) {
      Assert.assertFalse(resultSet.next());
    }

    retArray1 = new String[] {"0,4,4"};
    cnt = 0;
    try (ResultSet resultSet = statement.executeQuery("select count(s2) from root.*.*")) {
      while (resultSet.next()) {
        StringBuilder ans = new StringBuilder(resultSet.getString(TIMESTAMP_STR));
        for (int i = 3; i <= 4; i++) {
          ans.append(",").append(resultSet.getString(count("root.sg" + i + ".d1.s2")));
        }
        Assert.assertEquals(retArray1[cnt], ans.toString());
        cnt++;
      }
      Assert.assertEquals(retArray1.length, cnt);
    }
  }

  @Test
  public void deleteTimeSeriesWithMultiPatternTest() throws Exception {
    String[] retArray1 = new String[] {"0,4,4,4,4"};

    String insertSql = "insert into root.sg%d.d1(time, s1, s2) values(%d, %d, %d)";
    for (int i = 1; i <= 4; i++) {
      for (int j = 1; j <= 4; j++) {
        statement.execute(String.format(insertSql, j, i, i, i));
      }
    }

    int cnt = 0;
    try (ResultSet resultSet = statement.executeQuery("select count(s1) from root.*.d1")) {
      while (resultSet.next()) {
        StringBuilder ans = new StringBuilder(resultSet.getString(TIMESTAMP_STR));
        for (int i = 1; i <= 4; i++) {
          ans.append(",").append(resultSet.getString(count("root.sg" + i + ".d1.s1")));
        }
        Assert.assertEquals(retArray1[cnt], ans.toString());
        cnt++;
      }
      Assert.assertEquals(retArray1.length, cnt);
    }

    statement.execute("delete timeseries root.*.d1.s1, root.*.d1.s2");
    try (ResultSet resultSet = statement.executeQuery("select * from root.*.*")) {
      Assert.assertFalse(resultSet.next());
    }

    try (ResultSet resultSet = statement.executeQuery("show timeseries root.*.*.*")) {
      Assert.assertFalse(resultSet.next());
    }
  }

  @Test
  public void deleteTimeSeriesAndReturnPathNotExistsTest() throws Exception {
    try {
      statement.execute("delete timeseries root.**");
    } catch (SQLException e) {
      Assert.assertTrue(e.getMessage().contains("304: Path [root.**] does not exist"));
    }

    String[] retArray1 = new String[] {"0,4,4,4,4"};

    String insertSql = "insert into root.sg%d.d1(time, s1, s2) values(%d, %d, %d)";
    for (int i = 1; i <= 4; i++) {
      for (int j = 1; j <= 4; j++) {
        statement.execute(String.format(insertSql, j, i, i, i));
      }
    }

    int cnt = 0;
    try (ResultSet resultSet = statement.executeQuery("select count(s1) from root.*.d1")) {
      while (resultSet.next()) {
        StringBuilder ans = new StringBuilder(resultSet.getString(TIMESTAMP_STR));
        for (int i = 1; i <= 4; i++) {
          ans.append(",").append(resultSet.getString(count("root.sg" + i + ".d1.s1")));
        }
        Assert.assertEquals(retArray1[cnt], ans.toString());
        cnt++;
      }
      Assert.assertEquals(retArray1.length, cnt);
    }

    try {
      statement.execute("delete timeseries root.*.d1.s3");
    } catch (SQLException e) {
      Assert.assertTrue(e.getMessage().contains("304: Path [root.*.d1.s3] does not exist"));
    }
  }
}