/*
 * 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;

import java.io.IOException;
import java.util.ArrayList;

import org.junit.Assert;
import org.junit.Test;

import org.apache.iotdb.tsfile.common.conf.TSFileDescriptor;
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.common.RowRecord;
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.utils.Binary;
import org.apache.iotdb.tsfile.utils.TsFileGeneratorForTest;

public class ReadOnlyTsFileTest {

  private static final String FILE_PATH = TsFileGeneratorForTest.outputDataFile;
  private TsFileSequenceReader fileReader;
  private ReadOnlyTsFile tsFile;

  @Test
  public void test1() throws IOException {
    TSFileDescriptor.getInstance().getConfig().setTimeEncoder("TS_2DIFF");
    int rowCount = 1000;
    TsFileGeneratorForTest.generateFile(rowCount, 16 * 1024 * 1024, 10000);
    fileReader = new TsFileSequenceReader(FILE_PATH);
    tsFile = new ReadOnlyTsFile(fileReader);
    queryTest(rowCount);
    tsFile.close();
    TsFileGeneratorForTest.after();
  }

  private void queryTest(int rowCount) throws IOException {
    Filter filter = TimeFilter.lt(1480562618100L);
    Filter filter2 = ValueFilter.gt(new Binary("dog"));
    Filter filter3 = FilterFactory.and(TimeFilter.gtEq(1480562618000L), TimeFilter.ltEq(1480562618100L));

    IExpression IExpression = BinaryExpression
        .or(BinaryExpression.and(new SingleSeriesExpression(new Path("d1.s1"), filter),
            new SingleSeriesExpression(new Path("d1.s4"), filter2)), new GlobalTimeExpression(filter3));

    QueryExpression queryExpression = QueryExpression.create().addSelectedPath(new Path("d1.s1"))
        .addSelectedPath(new Path("d1.s4")).setExpression(IExpression);
    QueryDataSet queryDataSet = tsFile.query(queryExpression);
    long aimedTimestamp = 1480562618000L;
    while (queryDataSet.hasNext()) {
      // System.out.println("find next!");
      RowRecord rowRecord = queryDataSet.next();
      // System.out.println("result datum: "+rowRecord.getTimestamp()+","
      // +rowRecord.getFields());
      Assert.assertEquals(aimedTimestamp, rowRecord.getTimestamp());
      aimedTimestamp++;
    }

    queryExpression = QueryExpression.create().addSelectedPath(new Path("d1.s1")).addSelectedPath(new Path("d1.s4"));
    queryDataSet = tsFile.query(queryExpression);
    aimedTimestamp = 1480562618000L;
    int count = 0;
    while (queryDataSet.hasNext()) {
      RowRecord rowRecord = queryDataSet.next();
      Assert.assertEquals(aimedTimestamp, rowRecord.getTimestamp());
      aimedTimestamp++;
      count++;
    }
    Assert.assertEquals(rowCount, count);

    queryExpression = QueryExpression.create().addSelectedPath(new Path("d1.s1")).addSelectedPath(new Path("d1.s4"))
        .setExpression(new GlobalTimeExpression(filter3));
    queryDataSet = tsFile.query(queryExpression);
    aimedTimestamp = 1480562618000L;
    count = 0;
    while (queryDataSet.hasNext()) {
      RowRecord rowRecord = queryDataSet.next();
      Assert.assertEquals(aimedTimestamp, rowRecord.getTimestamp());
      aimedTimestamp++;
      count++;
    }
    Assert.assertEquals(101, count);
  }

  @Test
  public void test2() throws Exception {
    int minRowCount = 1000, maxRowCount = 100000;
    TSFileDescriptor.getInstance().getConfig().setTimeEncoder("TS_2DIFF");
    TsFileGeneratorForTest.generateFile(minRowCount, maxRowCount, 16 * 1024 * 1024, 10000);
    fileReader = new TsFileSequenceReader(FILE_PATH);
    tsFile = new ReadOnlyTsFile(fileReader);
    queryTest2();
    queryNonExistPathTest();
    tsFile.close();
    TsFileGeneratorForTest.after();
  }

  void queryTest2() throws IOException {
    ArrayList<Path> paths = new ArrayList<>();
    paths.add(new Path("d1.s6"));
    paths.add(new Path("d2.s1"));

    IExpression expression = new GlobalTimeExpression(TimeFilter.gt(1480562664760L));

    QueryExpression queryExpression = QueryExpression.create(paths, expression);

    QueryDataSet queryDataSet = tsFile.query(queryExpression);

    int cnt = 0;
    while (queryDataSet.hasNext()) {
      RowRecord r = queryDataSet.next();
      // System.out.println(r);
      cnt++;
    }
    Assert.assertEquals(10647, cnt);
  }

  void queryNonExistPathTest() throws Exception {
    ArrayList<Path> paths = new ArrayList<>();
    paths.add(new Path("dr.s1"));
    paths.add(new Path("d2.s1"));
    IExpression expression = new GlobalTimeExpression(TimeFilter.gt(1480562664760L));
    QueryExpression queryExpression = QueryExpression.create(paths, expression);
    try {
      QueryDataSet queryDataSet = tsFile.query(queryExpression);
    } catch (Exception e) {
      throw new Exception(e);
      // fail();
    }
  }

}
