/*
 * 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.tsfile.read.query.timegenerator;

import java.io.File;
import java.io.IOException;
import org.apache.iotdb.tsfile.constant.TestConstant;
import org.apache.iotdb.tsfile.exception.write.WriteProcessException;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.file.metadata.enums.TSEncoding;
import org.apache.iotdb.tsfile.read.ReadOnlyTsFile;
import org.apache.iotdb.tsfile.read.TsFileSequenceReader;
import org.apache.iotdb.tsfile.read.common.Path;
import org.apache.iotdb.tsfile.read.expression.IExpression;
import org.apache.iotdb.tsfile.read.expression.QueryExpression;
import org.apache.iotdb.tsfile.read.expression.impl.BinaryExpression;
import org.apache.iotdb.tsfile.read.expression.impl.GlobalTimeExpression;
import org.apache.iotdb.tsfile.read.expression.impl.SingleSeriesExpression;
import org.apache.iotdb.tsfile.read.filter.TimeFilter;
import org.apache.iotdb.tsfile.read.filter.ValueFilter;
import org.apache.iotdb.tsfile.read.filter.basic.Filter;
import org.apache.iotdb.tsfile.read.filter.factory.FilterFactory;
import org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet;
import org.apache.iotdb.tsfile.write.TsFileWriter;
import org.apache.iotdb.tsfile.write.record.TSRecord;
import org.apache.iotdb.tsfile.write.record.datapoint.DataPoint;
import org.apache.iotdb.tsfile.write.record.datapoint.FloatDataPoint;
import org.apache.iotdb.tsfile.write.record.datapoint.IntDataPoint;
import org.apache.iotdb.tsfile.write.schema.MeasurementSchema;
import org.apache.iotdb.tsfile.write.schema.Schema;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

public class TimeGeneratorReadWriteTest {

  private final String TEMPLATE_NAME = "template";
  private String tsfilePath = TestConstant.BASE_OUTPUT_PATH.concat("TimegeneratorReadWrite.tsfile");

  @Before
  public void before() throws IOException, WriteProcessException {
    writeTsFile(tsfilePath);
  }

  @After
  public void after() {
    File file = new File(tsfilePath);
    if (file.exists()) {
      file.delete();
    }
  }

  @Test
  public void testFilterAnd() throws IOException {
    Filter timeFilter = FilterFactory.and(TimeFilter.gtEq(1L), TimeFilter.ltEq(8L));
    IExpression timeExpression = new GlobalTimeExpression(timeFilter);

    IExpression valueExpression = BinaryExpression
        .and(new SingleSeriesExpression(new Path("d1.s1"), ValueFilter.gt(1.0f)),
            new SingleSeriesExpression(new Path("d1.s2"), ValueFilter.lt(22)));

    IExpression finalExpression = BinaryExpression.and(valueExpression, timeExpression);

    QueryExpression queryExpression = QueryExpression.create().addSelectedPath(new Path("d1.s1"))
        .addSelectedPath(new Path("d1.s2")).setExpression(finalExpression);

    try (TsFileSequenceReader fileReader = new TsFileSequenceReader(tsfilePath)) {
      ReadOnlyTsFile readOnlyTsFile = new ReadOnlyTsFile(fileReader);
      QueryDataSet dataSet = readOnlyTsFile.query(queryExpression);
      int i = 0;
      String[] expected = new String[]{
          "2\t1.2\t20",
          "3\t1.2\t20",
          "4\t1.2\t20",
          "5\t1.2\t20"};
      while (dataSet.hasNext()) {
        Assert.assertEquals(expected[i], dataSet.next().toString());
        i++;
      }
      Assert.assertEquals(4, i);
    }
  }


  /**
   * s1 -> 1, 2, 3, 4, 5
   * s2 ->    2, 3, 4, 5, 6
   */
  private void writeTsFile(String tsfilePath) throws IOException, WriteProcessException {
    File f = new File(tsfilePath);
    if (f.exists()) {
      f.delete();
    }

    Schema schema = new Schema();
    schema.extendTemplate(TEMPLATE_NAME, new MeasurementSchema("s1", TSDataType.FLOAT, TSEncoding.RLE));
    schema.extendTemplate(TEMPLATE_NAME, new MeasurementSchema("s2", TSDataType.INT32, TSEncoding.TS_2DIFF));

    TsFileWriter tsFileWriter = new TsFileWriter(new File(tsfilePath), schema);

    // s1 -> 1, 2, 3
    TSRecord tsRecord = new TSRecord(1, "d1");
    DataPoint dPoint1 = new FloatDataPoint("s1", 1.2f);
    tsRecord.addTuple(dPoint1);
    tsFileWriter.write(tsRecord);

    tsRecord = new TSRecord(2, "d1");
    dPoint1 = new FloatDataPoint("s1", 1.2f);
    tsRecord.addTuple(dPoint1);
    tsFileWriter.write(tsRecord);

    tsRecord = new TSRecord(3, "d1");
    dPoint1 = new FloatDataPoint("s1", 1.2f);
    tsRecord.addTuple(dPoint1);
    tsFileWriter.write(tsRecord);

    tsFileWriter.flushAllChunkGroups();


    // s2 -> 2, 3, 4
    tsRecord = new TSRecord(2, "d1");
    DataPoint dPoint2 = new IntDataPoint("s2", 20);
    tsRecord.addTuple(dPoint2);
    tsFileWriter.write(tsRecord);

    tsRecord = new TSRecord(3, "d1");
    dPoint2 = new IntDataPoint("s2", 20);
    tsRecord.addTuple(dPoint2);
    tsFileWriter.write(tsRecord);

    tsRecord = new TSRecord(4, "d1");
    dPoint2 = new IntDataPoint("s2", 20);
    tsRecord.addTuple(dPoint2);
    tsFileWriter.write(tsRecord);

    tsFileWriter.flushAllChunkGroups();


    // s1 -> 4, 5
    tsRecord = new TSRecord(4, "d1");
    dPoint1 = new FloatDataPoint("s1", 1.2f);
    tsRecord.addTuple(dPoint1);
    tsFileWriter.write(tsRecord);

    tsRecord = new TSRecord(5, "d1");
    dPoint1 = new FloatDataPoint("s1", 1.2f);
    tsRecord.addTuple(dPoint1);
    tsFileWriter.write(tsRecord);

    tsFileWriter.flushAllChunkGroups();

    // s2 -> 5, 6
    tsRecord = new TSRecord(5, "d1");
    dPoint2 = new IntDataPoint("s2", 20);
    tsRecord.addTuple(dPoint2);
    tsFileWriter.write(tsRecord);

    tsRecord = new TSRecord(6, "d1");
    dPoint2 = new IntDataPoint("s2", 20);
    tsRecord.addTuple(dPoint2);
    tsFileWriter.write(tsRecord);

    // close TsFile
    tsFileWriter.close();
  }
}
