/*
    * 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.omid.transaction;
  
  import org.apache.phoenix.thirdparty.com.google.common.collect.ImmutableList;
  import org.apache.hadoop.hbase.Cell;
  import org.apache.hadoop.hbase.CellUtil;
  import org.apache.hadoop.hbase.KeyValue;
  import org.apache.hadoop.hbase.util.Bytes;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.testng.annotations.Test;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.List;
  
  import static org.testng.Assert.assertEquals;
  
  @Test(groups = "noHBase")
  public class TestColumnIterator {
  
      final byte[] row = Bytes.toBytes("row");
      private final byte[] family1 = Bytes.toBytes("f1");
      private final byte[] family2 = Bytes.toBytes("f2");
      private final byte[] qualifier1 = Bytes.toBytes("c1");
      private final byte[] qualifier2 = Bytes.toBytes("c2");
      final byte[] data = Bytes.toBytes("data");
  
      private static final Logger LOG = LoggerFactory.getLogger(TestTransactionCleanup.class);
  
      private final List<Cell> cells = new ArrayList<Cell>(
              Arrays.asList(
                      // Group 1 (3 elems but grouping should filter shadow cell, so check for 2)
                      new KeyValue(row, family1, qualifier1, 0, data),
                      new KeyValue(row, family1, qualifier1, 1, data),
                      new KeyValue(row, family1, CellUtils.addShadowCellSuffixPrefix(qualifier1), 0, data),
                      // Group 2 (2 elems but grouping should filter shadow cell, so check for 1)
                      new KeyValue(row, family1, qualifier2, 0, data),
                      new KeyValue(row, family1, CellUtils.addShadowCellSuffixPrefix(qualifier2), 0, data),
                      // Group 3 (2 elems but grouping should filter shadow cell, so check for 1)
                      new KeyValue(row, family2, qualifier1, 0, data),
                      new KeyValue(row, family2, CellUtils.addShadowCellSuffixPrefix(qualifier1), 0, data)
              )
      );
  
      @Test(timeOut = 10_000)
      public void testGroupingCellsByColumnFilteringShadowCells() {
  
          ImmutableList<Collection<Cell>> groupedColumnsWithoutShadowCells =
                  SnapshotFilterImpl.groupCellsByColumnFilteringShadowCellsAndFamilyDeletion(cells);
          LOG.info("Column Groups " + groupedColumnsWithoutShadowCells);
          assertEquals(groupedColumnsWithoutShadowCells.size(), 3, "Should be 3 column groups");
          int group1Counter = 0;
          int group2Counter = 0;
          int group3Counter = 0;
          for (Collection<Cell> columns : groupedColumnsWithoutShadowCells) {
              for (Cell cell : columns) {
                  byte[] cellFamily = CellUtil.cloneFamily(cell);
                  byte[] cellQualifier = CellUtil.cloneQualifier(cell);
                  // Group 1
                  if (Bytes.equals(cellFamily, family1) &&
                          Bytes.equals(cellQualifier, qualifier1)) {
                      group1Counter++;
                  }
                  // Group 2
                  if (Bytes.equals(cellFamily, family1) &&
                          Bytes.equals(cellQualifier, qualifier2)) {
                      group2Counter++;
                  }
                  // Group 3
                  if (Bytes.equals(cellFamily, family2) &&
                          Bytes.equals(cellQualifier, qualifier1)) {
                      group3Counter++;
                  }
              }
          }
  
          assertEquals(group1Counter, 2, "Group 1 should have 2 elems");
          assertEquals(group2Counter, 1, "Group 2 should have 1 elems");
          assertEquals(group3Counter, 1, "Group 3 should have 1 elems");
      }
  }