/*
 * Copyright 2014 Fluo authors (see AUTHORS)
 *
 * Licensed 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 io.fluo.stress.trie;

import java.util.Map;

import org.apache.fluo.api.client.Loader;
import org.apache.fluo.api.client.TransactionBase;
import org.apache.fluo.api.data.Column;
import org.apache.fluo.recipes.core.types.TypedSnapshotBase.Value;
import org.apache.fluo.recipes.core.types.TypedTransactionBase;

import static com.google.common.base.Preconditions.checkArgument;

/**
 * Executes load transactions of numbers into trie at leaf node level
 */
public class NumberLoader implements Loader {

  private final Number number;
  private Integer nodeSize = null;

  public NumberLoader(Integer num, int nodeSize) {
    checkArgument(num >= 0, "Only positive numbers accepted");
    checkArgument((nodeSize <= 32) && ((32 % nodeSize) == 0), "nodeSize must be divisor of 32");
    this.number = num;
    this.nodeSize = nodeSize;
  }

  public NumberLoader(Long num) {
    checkArgument(num >= 0, "Only positive numbers accepted");
    this.number = num;
  }

  @Override
  public void load(TransactionBase tx, Context context) throws Exception {

    if (nodeSize == null) {
      nodeSize = context.getAppConfiguration().getInt(Constants.NODE_SIZE_PROP);
      checkArgument((nodeSize <= 64) && ((64 % nodeSize) == 0), "nodeSize must be divisor of 64");
    }
    int level = 64 / nodeSize;

    TypedTransactionBase ttx = Constants.TYPEL.wrap(tx);

    String rowId = new Node(number, level, nodeSize).getRowId();

    Map<Column, Value> colVals =
        ttx.get().row(rowId).columns(Constants.COUNT_SEEN_COL, Constants.COUNT_WAIT_COL);

    Integer seen = colVals.get(Constants.COUNT_SEEN_COL).toInteger(0);
    if (seen == 0) {
      Integer wait = colVals.get(Constants.COUNT_WAIT_COL).toInteger(0);
      if (wait == 0) {
        ttx.mutate().row(rowId).col(Constants.COUNT_WAIT_COL).set(1);
      }
    }
  }
}