/*
 * 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.udf;

import org.apache.iotdb.it.env.EnvFactory;
import org.apache.iotdb.it.framework.IoTDBTestRunner;
import org.apache.iotdb.itbase.category.ClusterIT;
import org.apache.iotdb.itbase.category.LocalStandaloneIT;
import org.apache.iotdb.itbase.constant.UDFTestConstant;

import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
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.SQLException;
import java.sql.Statement;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.fail;

@RunWith(IoTDBTestRunner.class)
@Category({LocalStandaloneIT.class, ClusterIT.class})
public class IoTDBUDFWindowQueryIT {

  protected static final int ITERATION_TIMES = 10000;

  @BeforeClass
  public static void setUp() throws Exception {
    EnvFactory.getEnv()
        .getConfig()
        .getCommonConfig()
        .setEnableSeqSpaceCompaction(false)
        .setEnableUnseqSpaceCompaction(false)
        .setEnableCrossSpaceCompaction(false)
        .setUdfMemoryBudgetInMB(5);
    EnvFactory.getEnv().initClusterEnvironment();
    createTimeSeries();
    generateData();
    registerUDF();
  }

  @AfterClass
  public static void tearDown() throws Exception {
    EnvFactory.getEnv().cleanClusterEnvironment();
  }

  private static void createTimeSeries() {
    try (Connection connection = EnvFactory.getEnv().getConnection();
        Statement statement = connection.createStatement()) {
      statement.execute("CREATE DATABASE root.vehicle");
      statement.execute("CREATE TIMESERIES root.vehicle.d1.s1 with datatype=INT32,encoding=PLAIN");
      statement.execute("CREATE TIMESERIES root.vehicle.d1.s2 with datatype=INT32,encoding=PLAIN");
      statement.execute("CREATE TIMESERIES root.vehicle1.d1.s1 with datatype=INT32,encoding=PLAIN");
    } catch (SQLException throwable) {
      fail(throwable.getMessage());
    }
  }

  private static void generateData() {
    try (Connection connection = EnvFactory.getEnv().getConnection();
        Statement statement = connection.createStatement()) {
      for (int i = 0; i < ITERATION_TIMES; ++i) {
        statement.execute(
            (String.format(
                "insert into root.vehicle.d1(timestamp,s1,s2) values(%d,%d,%d)", i, i, i)));
      }
      // test empty window, details could be found at https://github.com/apache/iotdb/issues/7738
      statement.execute("insert into root.vehicle1.d1(timestamp, s1) values (1,2),(2,3),(7,8)");
    } catch (SQLException throwable) {
      fail(throwable.getMessage());
    }
  }

  private static void registerUDF() {
    try (Connection connection = EnvFactory.getEnv().getConnection();
        Statement statement = connection.createStatement()) {
      statement.execute(
          "create function counter as 'org.apache.iotdb.db.query.udf.example.Counter'");
      statement.execute(
          "create function accumulator as 'org.apache.iotdb.db.query.udf.example.Accumulator'");
      statement.execute(
          "create function time_window_tester as 'org.apache.iotdb.db.query.udf.example.SlidingTimeWindowConstructionTester'");
      statement.execute(
          "create function size_window_0 as 'org.apache.iotdb.db.query.udf.example.SlidingSizeWindowConstructorTester0'");
      statement.execute(
          "create function size_window_1 as 'org.apache.iotdb.db.query.udf.example.SlidingSizeWindowConstructorTester1'");
      statement.execute(
          "create function window_start_end as 'org.apache.iotdb.db.query.udf.example.WindowStartEnd'");
    } catch (SQLException throwable) {
      fail(throwable.getMessage());
    }
  }

  @Test
  public void testRowByRow() {
    String sql =
        String.format(
            "select counter(s1, '%s'='%s') from root.vehicle.d1",
            UDFTestConstant.ACCESS_STRATEGY_KEY, UDFTestConstant.ACCESS_STRATEGY_ROW_BY_ROW);

    try (Connection conn = EnvFactory.getEnv().getConnection();
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql)) {
      int count = 0;
      assertEquals(2, resultSet.getMetaData().getColumnCount());
      while (resultSet.next()) {
        assertEquals(count++, (int) (Double.parseDouble(resultSet.getString(1))));
      }
      assertEquals(ITERATION_TIMES, count);
    } catch (SQLException throwable) {
      fail(throwable.getMessage());
    }
  }

  @Test
  public void testSlidingSizeWindow1() {
    testSlidingSizeWindow((int) (0.1 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindow2() {
    testSlidingSizeWindow((int) (0.033 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindow3() {
    testSlidingSizeWindow((int) (0.333 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindow4() {
    testSlidingSizeWindow((int) (1.5 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindow5() {
    testSlidingSizeWindow(ITERATION_TIMES);
  }

  @Test
  public void testSlidingSizeWindow6() {
    testSlidingSizeWindow(3 * ITERATION_TIMES);
  }

  @Test
  public void testSlidingSizeWindow7() {
    testSlidingSizeWindow(0);
  }

  @Test
  public void testSlidingSizeWindow8() {
    testSlidingSizeWindow(-ITERATION_TIMES);
  }

  private void testSlidingSizeWindow(int windowSize) {
    String sql =
        String.format(
            "select accumulator(s1, '%s'='%s', '%s'='%s') from root.vehicle.d1",
            UDFTestConstant.ACCESS_STRATEGY_KEY,
            UDFTestConstant.ACCESS_STRATEGY_SLIDING_SIZE,
            UDFTestConstant.WINDOW_SIZE_KEY,
            windowSize);

    try (Connection conn = EnvFactory.getEnv().getConnection();
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql)) {
      assertEquals(2, resultSet.getMetaData().getColumnCount());

      int count = 0;
      while (resultSet.next()) {
        int expectedWindowSize =
            (count < ITERATION_TIMES / windowSize)
                ? windowSize
                : ITERATION_TIMES - (ITERATION_TIMES / windowSize) * windowSize;

        int expectedAccumulation = 0;
        for (int i = count * windowSize; i < count * windowSize + expectedWindowSize; ++i) {
          expectedAccumulation += i;
        }

        assertEquals(expectedAccumulation, (int) (Double.parseDouble(resultSet.getString(2))));
        ++count;
      }
    } catch (SQLException throwable) {
      if (0 < windowSize || !throwable.getMessage().contains(String.valueOf(windowSize))) {
        fail(throwable.getMessage());
      }
    }

    sql =
        String.format(
            "select window_start_end(s1, '%s'='%s', '%s'='%s') from root.vehicle.d1",
            UDFTestConstant.ACCESS_STRATEGY_KEY,
            UDFTestConstant.ACCESS_STRATEGY_SLIDING_SIZE,
            UDFTestConstant.WINDOW_SIZE_KEY,
            windowSize);

    try (Connection conn = EnvFactory.getEnv().getConnection();
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql)) {
      assertEquals(2, resultSet.getMetaData().getColumnCount());

      int count = 0;
      while (resultSet.next()) {
        int expectedWindowSize =
            (count < ITERATION_TIMES / windowSize)
                ? windowSize
                : ITERATION_TIMES - (ITERATION_TIMES / windowSize) * windowSize;

        assertEquals(count * windowSize, (int) (Long.parseLong(resultSet.getString(1))));
        assertEquals(
            expectedWindowSize - 1,
            Long.parseLong(resultSet.getString(2)) - Long.parseLong(resultSet.getString(1)));

        ++count;
      }
    } catch (SQLException throwable) {
      if (0 < windowSize || !throwable.getMessage().contains(String.valueOf(windowSize))) {
        fail(throwable.getMessage());
      }
    }
  }

  @Test
  public void testSlidingTimeWindow1() {
    testSlidingTimeWindow(
        (int) (0.33 * ITERATION_TIMES),
        (int) (0.33 * ITERATION_TIMES),
        (int) (0.33 * ITERATION_TIMES),
        (int) (0.33 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingTimeWindow2() {
    testSlidingTimeWindow(
        (int) (0.033 * ITERATION_TIMES),
        (int) (2 * 0.033 * ITERATION_TIMES),
        ITERATION_TIMES / 2,
        ITERATION_TIMES);
  }

  @Test
  public void testSlidingTimeWindow3() {
    testSlidingTimeWindow(
        (int) (2 * 0.033 * ITERATION_TIMES),
        (int) (0.033 * ITERATION_TIMES),
        ITERATION_TIMES / 2,
        ITERATION_TIMES);
  }

  @Test
  public void testSlidingTimeWindow4() {
    testSlidingTimeWindow(
        (int) (0.033 * ITERATION_TIMES),
        (int) (0.033 * ITERATION_TIMES),
        ITERATION_TIMES / 2,
        ITERATION_TIMES);
  }

  @Test
  public void testSlidingTimeWindow5() {
    testSlidingTimeWindow(ITERATION_TIMES, ITERATION_TIMES, 0, ITERATION_TIMES);
  }

  @Test
  public void testSlidingTimeWindow6() {
    testSlidingTimeWindow(
        (int) (1.01 * ITERATION_TIMES), (int) (0.01 * ITERATION_TIMES), 0, ITERATION_TIMES / 2);
  }

  @Test
  public void testSlidingTimeWindow7() {
    testSlidingTimeWindow(
        (int) (0.01 * ITERATION_TIMES), (int) (1.01 * ITERATION_TIMES), 0, ITERATION_TIMES / 2);
  }

  @Test
  public void testSlidingTimeWindow8() {
    testSlidingTimeWindow(
        (int) (1.01 * ITERATION_TIMES), (int) (1.01 * ITERATION_TIMES), 0, ITERATION_TIMES / 2);
  }

  @Test
  public void testSlidingTimeWindow9() {
    testSlidingTimeWindow(
        (int) (0.01 * ITERATION_TIMES), (int) (0.05 * ITERATION_TIMES), ITERATION_TIMES / 2, 0);
  }

  @Test
  public void testSlidingTimeWindow10() {
    testSlidingTimeWindow(
        (int) (-0.01 * ITERATION_TIMES), (int) (0.05 * ITERATION_TIMES), 0, ITERATION_TIMES / 2);
  }

  @Test
  public void testSlidingTimeWindow11() {
    testSlidingTimeWindow(
        (int) (0.01 * ITERATION_TIMES), (int) (-0.05 * ITERATION_TIMES), 0, ITERATION_TIMES / 2);
  }

  @Test
  public void testSlidingTimeWindow12() {
    testSlidingTimeWindow((int) (0.01 * ITERATION_TIMES), 0, 0, ITERATION_TIMES / 2);
  }

  @Test
  public void testSlidingTimeWindow13() {
    testSlidingTimeWindow(0, (int) (0.05 * ITERATION_TIMES), 0, ITERATION_TIMES / 2);
  }

  private void testSlidingTimeWindow(
      int timeInterval, int slidingStep, int displayWindowBegin, int displayWindowEnd) {
    String sql =
        String.format(
            "select accumulator(s1, s1, s1, '%s'='%s', '%s'='%s', '%s'='%s', '%s'='%s', '%s'='%s') from root.vehicle.d1",
            UDFTestConstant.ACCESS_STRATEGY_KEY,
            UDFTestConstant.ACCESS_STRATEGY_SLIDING_TIME,
            UDFTestConstant.TIME_INTERVAL_KEY,
            timeInterval,
            UDFTestConstant.SLIDING_STEP_KEY,
            slidingStep,
            UDFTestConstant.DISPLAY_WINDOW_BEGIN_KEY,
            displayWindowBegin,
            UDFTestConstant.DISPLAY_WINDOW_END_KEY,
            displayWindowEnd);

    int expectedCnt =
        slidingStep <= 0
            ? 0
            : (int) Math.ceil((displayWindowEnd - displayWindowBegin) / (double) slidingStep);
    try (Connection conn = EnvFactory.getEnv().getConnection();
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql)) {
      assertEquals(2, resultSet.getMetaData().getColumnCount());

      int count = 0;
      while (resultSet.next()) {
        int begin = displayWindowBegin + count * slidingStep;
        int expectedWindowSize =
            begin + timeInterval < displayWindowEnd ? timeInterval : displayWindowEnd - begin;

        int expectedAccumulation = 0;
        for (int i = displayWindowBegin + count * slidingStep;
            i < displayWindowBegin + count * slidingStep + expectedWindowSize;
            ++i) {
          expectedAccumulation += i;
        }

        assertEquals(expectedAccumulation, (int) (Double.parseDouble(resultSet.getString(2))));
        ++count;
      }
      assertEquals(expectedCnt, count);
    } catch (SQLException throwable) {
      if (slidingStep > 0 && timeInterval > 0 && displayWindowEnd >= displayWindowBegin) {
        fail(throwable.getMessage());
      }
    }

    sql =
        String.format(
            "select window_start_end(s1, s1, s1, '%s'='%s', '%s'='%s', '%s'='%s', '%s'='%s', '%s'='%s') from root.vehicle.d1",
            UDFTestConstant.ACCESS_STRATEGY_KEY,
            UDFTestConstant.ACCESS_STRATEGY_SLIDING_TIME,
            UDFTestConstant.TIME_INTERVAL_KEY,
            timeInterval,
            UDFTestConstant.SLIDING_STEP_KEY,
            slidingStep,
            UDFTestConstant.DISPLAY_WINDOW_BEGIN_KEY,
            displayWindowBegin,
            UDFTestConstant.DISPLAY_WINDOW_END_KEY,
            displayWindowEnd);

    try (Connection conn = EnvFactory.getEnv().getConnection();
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql)) {
      assertEquals(2, resultSet.getMetaData().getColumnCount());

      int count = 0;
      while (resultSet.next()) {
        int begin = displayWindowBegin + count * slidingStep;

        assertEquals(begin, (int) (Long.parseLong(resultSet.getString(1))));
        assertEquals(
            timeInterval - 1,
            Long.parseLong(resultSet.getString(2)) - Long.parseLong(resultSet.getString(1)));

        ++count;
      }
      assertEquals(expectedCnt, count);
    } catch (SQLException throwable) {
      if (slidingStep > 0 && timeInterval > 0 && displayWindowEnd >= displayWindowBegin) {
        fail(throwable.getMessage());
      }
    }
  }

  @Test
  public void testSlidingTimeWindowWithEmptyWindow() {
    String sql =
        String.format(
            "select time_window_tester(s1, '%s'='%s') from root.vehicle1.d1",
            UDFTestConstant.TIME_INTERVAL_KEY, 3);
    try (Connection conn = EnvFactory.getEnv().getConnection();
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql)) {
      assertEquals(2, resultSet.getMetaData().getColumnCount());

      int count = 0;
      if (resultSet.next()) {
        assertEquals(5, (int) (Double.parseDouble(resultSet.getString(2))));
        ++count;
      }
      if (resultSet.next()) {
        assertEquals(8, (int) (Double.parseDouble(resultSet.getString(2))));
        ++count;
      }
      assertFalse(resultSet.next());
      assertEquals(2, count);
    } catch (SQLException throwable) {
      fail();
    }
  }

  @Test
  public void testSlidingTimeWindowWithTimeIntervalOnly1() {
    testSlidingTimeWindowWithTimeIntervalOnly(1);
  }

  @Test
  public void testSlidingTimeWindowWithTimeIntervalOnly2() {
    testSlidingTimeWindowWithTimeIntervalOnly(ITERATION_TIMES / 10);
  }

  @Test
  public void testSlidingTimeWindowWithTimeIntervalOnly3() {
    testSlidingTimeWindowWithTimeIntervalOnly(ITERATION_TIMES / 33);
  }

  @Test
  public void testSlidingTimeWindowWithTimeIntervalOnly4() {
    testSlidingTimeWindowWithTimeIntervalOnly(ITERATION_TIMES);
  }

  @Test
  public void testSlidingTimeWindowWithTimeIntervalOnly5() {
    testSlidingTimeWindowWithTimeIntervalOnly(2 * ITERATION_TIMES);
  }

  @Test
  public void testSlidingTimeWindowWithTimeIntervalOnly6() {
    testSlidingTimeWindowWithTimeIntervalOnly(-ITERATION_TIMES);
  }

  private void testSlidingTimeWindowWithTimeIntervalOnly(int timeInterval) {
    String sql =
        String.format(
            "select time_window_tester(s1, '%s'='%s') from root.vehicle.d1",
            UDFTestConstant.TIME_INTERVAL_KEY, timeInterval);

    int displayWindowBegin = 0;
    int displayWindowEnd = ITERATION_TIMES;
    try (Connection conn = EnvFactory.getEnv().getConnection();
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql)) {
      assertEquals(2, resultSet.getMetaData().getColumnCount());

      int count = 0;
      while (resultSet.next()) {
        int begin = displayWindowBegin + count * timeInterval;
        int expectedWindowSize =
            begin + timeInterval < displayWindowEnd ? timeInterval : displayWindowEnd - begin;

        int expectedAccumulation = 0;
        for (int i = displayWindowBegin + count * timeInterval;
            i < displayWindowBegin + count * timeInterval + expectedWindowSize;
            ++i) {
          expectedAccumulation += i;
        }

        assertEquals(expectedAccumulation, (int) (Double.parseDouble(resultSet.getString(2))));
        ++count;
      }
    } catch (SQLException throwable) {
      if (timeInterval > 0) {
        fail(throwable.getMessage());
      }
    }

    sql =
        String.format(
            "select window_start_end(s1, '%s'='%s', '%s'='%s') from root.vehicle.d1",
            UDFTestConstant.ACCESS_STRATEGY_KEY,
            UDFTestConstant.ACCESS_STRATEGY_SLIDING_TIME,
            UDFTestConstant.TIME_INTERVAL_KEY,
            timeInterval);

    try (Connection conn = EnvFactory.getEnv().getConnection();
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql)) {
      assertEquals(2, resultSet.getMetaData().getColumnCount());

      int count = 0;
      while (resultSet.next()) {
        int begin = displayWindowBegin + count * timeInterval;

        assertEquals(begin, (int) (Long.parseLong(resultSet.getString(1))));
        assertEquals(
            timeInterval - 1,
            Long.parseLong(resultSet.getString(2)) - Long.parseLong(resultSet.getString(1)));

        ++count;
      }
    } catch (SQLException throwable) {
      if (timeInterval > 0) {
        fail(throwable.getMessage());
      }
    }
  }

  @Test
  public void testSlidingSizeWindowWithSlidingStep1() {
    testSlidingSizeWindowWithSlidingStep(1, 1, 0);
    testSlidingSizeWindowWithSlidingStep(1, 1, 1);
    testSlidingSizeWindowWithSlidingStep(1, 1, 10);
    testSlidingSizeWindowWithSlidingStep(1, 1, (int) (0.434 * ITERATION_TIMES));
    testSlidingSizeWindowWithSlidingStep(1, 1, (int) (1.5 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindowWithSlidingStep2() {
    testSlidingSizeWindowWithSlidingStep(100, 100, 0);
    testSlidingSizeWindowWithSlidingStep(100, 100, 100);
    testSlidingSizeWindowWithSlidingStep(100, 100, 10000);
    testSlidingSizeWindowWithSlidingStep(100, 100, (int) (0.434 * ITERATION_TIMES));
    testSlidingSizeWindowWithSlidingStep(100, 100, (int) (1.5 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindowWithSlidingStep3() {
    testSlidingSizeWindowWithSlidingStep(111, 123, 0);
    testSlidingSizeWindowWithSlidingStep(111, 123, (int) (0.434 * ITERATION_TIMES));
    testSlidingSizeWindowWithSlidingStep(111, 123, (int) (1.5 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindowWithSlidingStep4() {
    testSlidingSizeWindowWithSlidingStep(123, 111, 0);
    testSlidingSizeWindowWithSlidingStep(123, 111, (int) (0.434 * ITERATION_TIMES));
    testSlidingSizeWindowWithSlidingStep(123, 111, (int) (1.5 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindowWithSlidingStep5() {
    testSlidingSizeWindowWithSlidingStep(100, 10000, 0);
    testSlidingSizeWindowWithSlidingStep(100, 10000, 100);
    testSlidingSizeWindowWithSlidingStep(100, 10000, 10000);
    testSlidingSizeWindowWithSlidingStep(100, 10000, (int) (0.434 * ITERATION_TIMES));
    testSlidingSizeWindowWithSlidingStep(100, 10000, (int) (1.5 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindowWithSlidingStep6() {
    testSlidingSizeWindowWithSlidingStep(10000, 1000, 0);
    testSlidingSizeWindowWithSlidingStep(10000, 1000, 1000);
    testSlidingSizeWindowWithSlidingStep(10000, 1000, 10000);
    testSlidingSizeWindowWithSlidingStep(10000, 1000, (int) (0.434 * ITERATION_TIMES));
    testSlidingSizeWindowWithSlidingStep(10000, 1000, (int) (1.5 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindowWithSlidingStep7() {
    testSlidingSizeWindowWithSlidingStep((int) (1.5 * ITERATION_TIMES), 4333, 0);
    testSlidingSizeWindowWithSlidingStep(
        (int) (1.5 * ITERATION_TIMES), 4333, (int) (0.434 * ITERATION_TIMES));
    testSlidingSizeWindowWithSlidingStep(
        (int) (1.5 * ITERATION_TIMES), 4333, (int) (1.5 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindowWithSlidingStep8() {
    testSlidingSizeWindowWithSlidingStep(10000, (int) (1.5 * ITERATION_TIMES), 0);
    testSlidingSizeWindowWithSlidingStep(
        10000, (int) (1.5 * ITERATION_TIMES), (int) (0.434 * ITERATION_TIMES));
    testSlidingSizeWindowWithSlidingStep(
        10000, (int) (1.5 * ITERATION_TIMES), (int) (1.5 * ITERATION_TIMES));
  }

  @Test
  public void testSlidingSizeWindowWithSlidingStep9() {
    testSlidingSizeWindowWithSlidingStep(
        (int) (1.5 * ITERATION_TIMES), (int) (1.5 * ITERATION_TIMES), 0);
    testSlidingSizeWindowWithSlidingStep(
        (int) (1.5 * ITERATION_TIMES),
        (int) (1.5 * ITERATION_TIMES),
        (int) (0.434 * ITERATION_TIMES));
    testSlidingSizeWindowWithSlidingStep(
        (int) (1.5 * ITERATION_TIMES),
        (int) (1.5 * ITERATION_TIMES),
        (int) (1.5 * ITERATION_TIMES));
  }

  private void testSlidingSizeWindowWithSlidingStep(
      int windowSize, int slidingStep, int consumptionPoint) {
    String sql =
        String.format(
            "select size_window_0(s1, '%s'='%s', '%s'='%s'), size_window_1(s1, '%s'='%s') from root.vehicle.d1",
            "windowSize",
            windowSize,
            "slidingStep",
            slidingStep,
            "consumptionPoint",
            consumptionPoint);

    try (Connection conn = EnvFactory.getEnv().getConnection();
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql)) {
      assertEquals(3, resultSet.getMetaData().getColumnCount());

      int count = 0;
      while (resultSet.next()) {
        if (ITERATION_TIMES < windowSize) {
          String actual = resultSet.getString(2);
          if (actual != null) {
            assertEquals(ITERATION_TIMES - (long) count * slidingStep, Integer.parseInt(actual));
            ++count;
          }
        } else if (count * slidingStep + windowSize < ITERATION_TIMES) {
          String actual = resultSet.getString(2);
          if (actual != null) {
            assertEquals(windowSize, Integer.parseInt(resultSet.getString(2)));
            ++count;
          }
        } else {
          String actual = resultSet.getString(2);
          if (actual != null) {
            assertEquals(
                ITERATION_TIMES - (long) count * slidingStep,
                Integer.parseInt(resultSet.getString(2)));
            ++count;
          }
        }
      }
      assertEquals((int) Math.ceil(ITERATION_TIMES / (double) slidingStep), count);
    } catch (SQLException throwable) {
      if (windowSize > 0) {
        fail(throwable.getMessage());
      }
    }

    sql =
        String.format(
            "select window_start_end(s1, '%s'='%s', '%s'='%s', '%s'='%s'), size_window_1(s1, '%s'='%s') from root.vehicle.d1",
            UDFTestConstant.ACCESS_STRATEGY_KEY,
            UDFTestConstant.ACCESS_STRATEGY_SLIDING_SIZE,
            UDFTestConstant.WINDOW_SIZE_KEY,
            windowSize,
            UDFTestConstant.SLIDING_STEP_KEY,
            slidingStep,
            "consumptionPoint",
            consumptionPoint);

    try (Connection conn = EnvFactory.getEnv().getConnection();
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql)) {
      assertEquals(3, resultSet.getMetaData().getColumnCount());

      int count = 0;
      while (resultSet.next()) {

        if (ITERATION_TIMES < windowSize) {
          String actual = resultSet.getString(2);
          if (actual != null) {
            assertEquals(count * slidingStep, Integer.parseInt(resultSet.getString(1)));
            assertEquals(
                ITERATION_TIMES - (long) count * slidingStep - 1,
                Integer.parseInt(actual) - Integer.parseInt(resultSet.getString(1)));
            ++count;
          }
        } else if (count * slidingStep + windowSize < ITERATION_TIMES) {
          String actual = resultSet.getString(2);
          if (actual != null) {
            assertEquals(count * slidingStep, Integer.parseInt(resultSet.getString(1)));
            assertEquals(
                windowSize - 1,
                Integer.parseInt(resultSet.getString(2))
                    - Integer.parseInt(resultSet.getString(1)));
            ++count;
          }
        } else {
          String actual = resultSet.getString(2);
          if (actual != null) {
            assertEquals(count * slidingStep, Integer.parseInt(resultSet.getString(1)));
            assertEquals(
                ITERATION_TIMES - (long) count * slidingStep - 1,
                Integer.parseInt(resultSet.getString(2))
                    - Integer.parseInt(resultSet.getString(1)));
            ++count;
          }
        }
      }
      assertEquals((int) Math.ceil(ITERATION_TIMES / (double) slidingStep), count);
    } catch (SQLException throwable) {
      if (windowSize > 0) {
        fail(throwable.getMessage());
      }
    }
  }

  @Test
  public void testSizeWindowUDFWithConstants() {
    try (Connection connection = EnvFactory.getEnv().getConnection();
        Statement statement = connection.createStatement()) {

      String query =
          "SELECT accumulator(s1 + 1, 'access'='size', 'windowSize'='1000') FROM root.vehicle.d1";
      try (ResultSet rs = statement.executeQuery(query)) {
        int time = 0;
        int value = 500500;
        for (int i = 0; i < ITERATION_TIMES / 1000; i++) {
          Assert.assertTrue(rs.next());
          Assert.assertEquals(time, rs.getLong(1));
          Assert.assertEquals(value, rs.getLong(2));
          time += 1000;
          value += 1000000;
        }
        Assert.assertFalse(rs.next());
      }

      query =
          "SELECT 1 + accumulator(s1 + 1, 'access'='size', 'windowSize'='1000') FROM root.vehicle.d1";
      try (ResultSet rs = statement.executeQuery(query)) {
        int time = 0;
        double value = 500501D;
        for (int i = 0; i < ITERATION_TIMES / 1000; i++) {
          Assert.assertTrue(rs.next());
          Assert.assertEquals(time, rs.getLong(1));
          Assert.assertEquals(value, rs.getDouble(2), 0.001);
          time += 1000;
          value += 1000000D;
        }
        Assert.assertFalse(rs.next());
      }
    } catch (SQLException e) {
      e.printStackTrace();
      fail(e.getMessage());
    }
  }

  @Test
  public void testTimeWindowUDFWithConstants() {
    try (Connection connection = EnvFactory.getEnv().getConnection();
        Statement statement = connection.createStatement()) {
      String query =
          "SELECT accumulator("
              + "s1 + 1, "
              + "'access'='time', "
              + "'timeInterval'='1000', "
              + "'slidingStep'='1000', "
              + "'displayWindowBegin'='0', "
              + "'displayWindowEnd'='10000') FROM root.vehicle.d1";
      try (ResultSet rs = statement.executeQuery(query)) {
        int time = 0;
        int value = 500500;
        for (int i = 0; i < 10; i++) {
          Assert.assertTrue(rs.next());
          Assert.assertEquals(time, rs.getLong(1));
          Assert.assertEquals(value, rs.getLong(2));
          time += 1000;
          value += 1000000;
        }
        Assert.assertFalse(rs.next());
      }

      query =
          "SELECT 1 + accumulator("
              + "s1 + 1, "
              + "'access'='time', "
              + "'timeInterval'='1000', "
              + "'slidingStep'='1000', "
              + "'displayWindowBegin'='0', "
              + "'displayWindowEnd'='10000') FROM root.vehicle.d1";
      try (ResultSet rs = statement.executeQuery(query)) {
        int time = 0;
        double value = 500501;
        for (int i = 0; i < 10; i++) {
          Assert.assertTrue(rs.next());
          Assert.assertEquals(time, rs.getLong(1));
          Assert.assertEquals(value, rs.getDouble(2), 0.001D);
          time += 1000;
          value += 1000000D;
        }
        Assert.assertFalse(rs.next());
      }
    } catch (SQLException e) {
      e.printStackTrace();
      fail(e.getMessage());
    }
  }
}
