/**
 * 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.accumulo.pig;

import java.io.IOException;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;

import org.apache.accumulo.core.client.AccumuloSecurityException;
import org.apache.accumulo.core.client.BatchWriterConfig;
import org.apache.accumulo.core.client.mapreduce.AccumuloInputFormat;
import org.apache.accumulo.core.client.mapreduce.AccumuloOutputFormat;
import org.apache.accumulo.core.client.security.tokens.PasswordToken;
import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.Mutation;
import org.apache.accumulo.core.data.Range;
import org.apache.accumulo.core.data.Value;
import org.apache.accumulo.core.security.Authorizations;
import org.apache.accumulo.core.util.Pair;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.pig.data.Tuple;
import org.junit.Assert;
import org.junit.Test;

public class AbstractAccumuloStorageTest {
  
  public Job getExpectedLoadJob(String inst, String zookeepers, String user, String password, String table, String start, String end,
      Authorizations authorizations, List<Pair<Text,Text>> columnFamilyColumnQualifierPairs) throws IOException {
    Collection<Range> ranges = new LinkedList<Range>();
    ranges.add(new Range(start, end));
    
    Job expected = new Job(new Configuration());
    
    try {
      AccumuloInputFormat.setConnectorInfo(expected, user, new PasswordToken(password));
    } catch (AccumuloSecurityException e) {
      Assert.fail(e.getMessage());
    }
    AccumuloInputFormat.setInputTableName(expected, table);
    AccumuloInputFormat.setScanAuthorizations(expected, authorizations);
    AccumuloInputFormat.setZooKeeperInstance(expected, inst, zookeepers);
    AccumuloInputFormat.fetchColumns(expected, columnFamilyColumnQualifierPairs);
    AccumuloInputFormat.setRanges(expected, ranges);
    
    return expected;
  }
  
  public Job getDefaultExpectedLoadJob() throws IOException {
    String inst = "myinstance";
    String zookeepers = "127.0.0.1:2181";
    String user = "root";
    String password = "secret";
    String table = "table1";
    String start = "abc";
    String end = "z";
    Authorizations authorizations = new Authorizations("PRIVATE,PUBLIC".split(","));
    
    List<Pair<Text,Text>> columnFamilyColumnQualifierPairs = new LinkedList<Pair<Text,Text>>();
    columnFamilyColumnQualifierPairs.add(new Pair<Text,Text>(new Text("col1"), new Text("cq1")));
    columnFamilyColumnQualifierPairs.add(new Pair<Text,Text>(new Text("col2"), new Text("cq2")));
    columnFamilyColumnQualifierPairs.add(new Pair<Text,Text>(new Text("col3"), null));
    
    Job expected = getExpectedLoadJob(inst, zookeepers, user, password, table, start, end, authorizations, columnFamilyColumnQualifierPairs);
    return expected;
  }
  
  public Job getExpectedStoreJob(String inst, String zookeepers, String user, String password, String table, long maxWriteBufferSize, int writeThreads,
      int maxWriteLatencyMS) throws IOException {
    
    Job expected = new Job(new Configuration());
    
    try {
      AccumuloOutputFormat.setConnectorInfo(expected, user, new PasswordToken(password));
    } catch (AccumuloSecurityException e) {
      Assert.fail(e.getMessage());
    }
    
    AccumuloOutputFormat.setZooKeeperInstance(expected, inst, zookeepers);
    AccumuloOutputFormat.setCreateTables(expected, true);
    
    BatchWriterConfig bwConfig = new BatchWriterConfig();
    bwConfig.setMaxLatency(maxWriteLatencyMS, TimeUnit.MILLISECONDS);
    bwConfig.setMaxMemory(maxWriteBufferSize);
    bwConfig.setMaxWriteThreads(writeThreads);
    
    AccumuloOutputFormat.setBatchWriterOptions(expected, bwConfig);
    
    return expected;
  }
  
  public Job getDefaultExpectedStoreJob() throws IOException {
    String inst = "myinstance";
    String zookeepers = "127.0.0.1:2181";
    String user = "root";
    String password = "secret";
    String table = "table1";
    long maxWriteBufferSize = 1234000;
    int writeThreads = 7;
    int maxWriteLatencyMS = 30000;
    
    Job expected = getExpectedStoreJob(inst, zookeepers, user, password, table, maxWriteBufferSize, writeThreads, maxWriteLatencyMS);
    return expected;
  }
  
  public String getDefaultLoadLocation() {
    return "accumulo://table1?instance=myinstance&user=root&password=secret&zookeepers=127.0.0.1:2181&auths=PRIVATE,PUBLIC&fetch_columns=col1:cq1,col2:cq2,col3&start=abc&end=z";
  }
  
  public String getDefaultStoreLocation() {
    return "accumulo://table1?instance=myinstance&user=root&password=secret&zookeepers=127.0.0.1:2181&write_buffer_size_bytes=1234000&write_threads=7&write_latency_ms=30000";
  }
  
  public AbstractAccumuloStorage getAbstractAccumuloStorage() {
    AbstractAccumuloStorage s = new AbstractAccumuloStorage() {
      
      @Override
      public Collection<Mutation> getMutations(Tuple tuple) {
        return null;
      }
      
      @Override
      protected Tuple getTuple(Key key, Value value) throws IOException {
        return null;
      }
    };
    return s;
  }
  
  @Test
  public void testSetLoadLocation() throws IOException {
    AbstractAccumuloStorage s = getAbstractAccumuloStorage();
    
    Job actual = new Job();
    s.setLocation(getDefaultLoadLocation(), actual);
    Configuration actualConf = actual.getConfiguration();
    
    Job expected = getDefaultExpectedLoadJob();
    Configuration expectedConf = expected.getConfiguration();
    
    TestUtils.assertConfigurationsEqual(expectedConf, actualConf);
  }
  
  @Test
  public void testSetStoreLocation() throws IOException {
    AbstractAccumuloStorage s = getAbstractAccumuloStorage();
    
    Job actual = new Job();
    s.setStoreLocation(getDefaultStoreLocation(), actual);
    Configuration actualConf = actual.getConfiguration();
    
    Job expected = getDefaultExpectedStoreJob();
    Configuration expectedConf = expected.getConfiguration();
    
    TestUtils.assertConfigurationsEqual(expectedConf, actualConf);
  }
}