/*
    * 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.giraph.io;
  
  
  import java.io.IOException;
  
  import org.apache.giraph.conf.GiraphConfiguration;
  import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
  import org.apache.giraph.edge.EdgeFactory;
  import org.apache.giraph.graph.Vertex;
  import org.apache.giraph.io.formats.AdjacencyListTextVertexInputFormat;
  import org.apache.giraph.io.formats.LongDoubleDoubleAdjacencyListVertexInputFormat;
  
  import org.apache.giraph.utils.NoOpComputation;
  import org.apache.hadoop.io.BooleanWritable;
  import org.apache.hadoop.io.DoubleWritable;
  import org.apache.hadoop.io.LongWritable;
  import org.apache.hadoop.io.Text;
  import org.apache.hadoop.mapreduce.InputSplit;
  import org.apache.hadoop.mapreduce.RecordReader;
  import org.apache.hadoop.mapreduce.TaskAttemptContext;
  import org.junit.Before;
  import org.junit.Test;
  
  import static org.apache.giraph.io.TestTextDoubleDoubleAdjacencyListVertexInputFormat.assertValidVertex;
  import static org.junit.Assert.*;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  public class TestLongDoubleDoubleAdjacencyListVertexInputFormat extends LongDoubleDoubleAdjacencyListVertexInputFormat {
  
    private RecordReader<LongWritable, Text> rr;
    private ImmutableClassesGiraphConfiguration<LongWritable, DoubleWritable,
        DoubleWritable> conf;
    private TaskAttemptContext tac;
  
    @Before
    public void setUp() throws IOException, InterruptedException {
      rr = mock(RecordReader.class);
      when(rr.nextKeyValue()).thenReturn(true);
      GiraphConfiguration giraphConf = new GiraphConfiguration();
      giraphConf.setComputationClass(DummyComputation.class);
      conf = new ImmutableClassesGiraphConfiguration<LongWritable, DoubleWritable,
          DoubleWritable>(giraphConf);
      tac = mock(TaskAttemptContext.class);
      when(tac.getConfiguration()).thenReturn(conf);
    }
  
    protected TextVertexReader createVertexReader(
         RecordReader<LongWritable, Text> rr) {
      return createVertexReader(rr, null);
    }
  
    protected TextVertexReader createVertexReader(
        final RecordReader<LongWritable, Text> rr, LineSanitizer lineSanitizer) {
      return new LongDoubleDoubleAdjacencyListVertexReader(lineSanitizer) {
        @Override
        protected RecordReader<LongWritable, Text> createLineRecordReader(
            InputSplit inputSplit, TaskAttemptContext context)
            throws IOException, InterruptedException {
          return rr;
        }
      };
    }
  
    @Test
    public void testIndexMustHaveValue() throws IOException, InterruptedException {
      String input = "123";
  
      when(rr.getCurrentValue()).thenReturn(new Text(input));
      TextVertexReader vr = createVertexReader(rr);
  
      vr.setConf(conf);
      vr.initialize(null, tac);
  
      try {
        vr.nextVertex();
        vr.getCurrentVertex();
        fail("Should have thrown an IllegalArgumentException");
      } catch (IllegalArgumentException iae) {
        assertTrue(iae.getMessage().startsWith("Line did not split correctly: "));
      }
    }
 
   @Test
   public void testEdgesMustHaveValues() throws IOException, InterruptedException {
     String input = "99\t55.2\t100";
 
     when(rr.getCurrentValue()).thenReturn(new Text(input));
     TextVertexReader vr = createVertexReader(rr);
 
     vr.setConf(conf);
     vr.initialize(null, tac);
 
     try {
       vr.nextVertex();
       vr.getCurrentVertex();
       fail("Should have thrown an IllegalArgumentException");
     } catch (IllegalArgumentException iae) {
       assertTrue(iae.getMessage().startsWith("Line did not split correctly: "));
     }
   }
 
   @Test
   public void testHappyPath() throws Exception {
     String input = "42\t0.1\t99\t0.2\t2000\t0.3\t4000\t0.4";
 
     when(rr.getCurrentValue()).thenReturn(new Text(input));
     TextVertexReader vr = createVertexReader(rr);
     vr.setConf(conf);
     vr.initialize(null, tac);
 
     assertTrue("Should have been able to read vertex", vr.nextVertex());
     Vertex<LongWritable, DoubleWritable, DoubleWritable>
         vertex = vr.getCurrentVertex();
     assertValidVertex(conf, vertex,
         new LongWritable(42), new DoubleWritable(0.1),
         EdgeFactory.create(new LongWritable(99), new DoubleWritable(0.2)),
         EdgeFactory.create(new LongWritable(2000), new DoubleWritable(0.3)),
         EdgeFactory.create(new LongWritable(4000), new DoubleWritable(0.4)));
     assertEquals(vertex.getNumEdges(), 3);
   }
 
   @Test
   public void testDifferentSeparators() throws Exception {
     String input = "12345:42.42:9999999:99.9";
 
     when(rr.getCurrentValue()).thenReturn(new Text(input));
     conf.set(AdjacencyListTextVertexInputFormat.LINE_TOKENIZE_VALUE, ":");
     TextVertexReader vr = createVertexReader(rr);
     vr.setConf(conf);
     vr.initialize(null, tac);
     assertTrue("Should have been able to read vertex", vr.nextVertex());
     Vertex<LongWritable, DoubleWritable, DoubleWritable>
         vertex = vr.getCurrentVertex();
     assertValidVertex(conf, vertex,
         new LongWritable(12345), new DoubleWritable(42.42),
        EdgeFactory.create(new LongWritable(9999999), new DoubleWritable(99.9)));
     assertEquals(vertex.getNumEdges(), 1);
   }
 
   public static class DummyComputation extends NoOpComputation<LongWritable,
       DoubleWritable, DoubleWritable, BooleanWritable> { }
 }