/*
    * 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.hadoop.chukwa.util;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  import org.apache.hadoop.chukwa.*;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.fs.FileSystem;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.io.SequenceFile;
  import org.apache.hadoop.io.Text;
  import junit.framework.TestCase;
  import static org.apache.hadoop.chukwa.util.ConstRateValidator.ByteRange;
  import static org.apache.hadoop.chukwa.util.ConstRateValidator.ValidatorSM;
  import static org.apache.hadoop.chukwa.util.TempFileUtil.writeASinkFile;
  
  public class TestCRValidator extends TestCase{
    
    public void testCRchunks() {
      ConstRateAdaptor adaptor = new ConstRateAdaptor();
      adaptor.parseArgs("500  200 ");
      adaptor.test_init("testdata");
      Chunk c = adaptor.nextChunk(100);
      assertTrue(ConstRateAdaptor.checkChunk(c));
      c = adaptor.nextChunk(102);
      assertTrue(ConstRateAdaptor.checkChunk(c));
    }
    
    public void testBasicSM() throws Exception {
      ValidatorSM sm = new ValidatorSM();
      byte[] dat = "test".getBytes();    
      ChunkImpl c = new ChunkImpl("Data", "aname", dat.length, dat, null);
      ByteRange b = new ByteRange(c);
      assertEquals(4, b.len);
      assertEquals(0, b.start);
      String t = sm.advanceSM(b);
      assertNull(t);
      if(t != null)
        System.out.println(t);
  
      dat = "ing".getBytes();
      c = new ChunkImpl("Data", "aname", dat.length+4, dat, null);
      b = new ByteRange(c);
      assertEquals(4, b.start);
      t = sm.advanceSM(b);
      assertNull(t);
      if(t != null)
        System.out.println(t);
      
     b = new ByteRange(new ChunkImpl("Data", "aname", 12, "more".getBytes(), null));
     t= sm.advanceSM(b);
     System.out.println(t);
    }
    
    public void testSlurping() throws Exception {
      int NUM_CHUNKS = 10;
      Configuration conf = new Configuration();
      FileSystem localfs = FileSystem.getLocal(conf);
      String baseDir = System.getProperty("test.build.data", "/tmp");
      Path tmpFile = new Path(baseDir+"/tmpSeqFile.seq");
      writeASinkFile(conf, localfs, tmpFile, NUM_CHUNKS);
       
      ValidatorSM sm = new ValidatorSM();
      
      try {
        SequenceFile.Reader reader = new SequenceFile.Reader(localfs, tmpFile, conf);
  
        ChukwaArchiveKey key = new ChukwaArchiveKey();
        ChunkImpl chunk = ChunkImpl.getBlankChunk();
  
        while (reader.next(key, chunk)) {
            String s = sm.advanceSM(new ByteRange(chunk));
            assertNull(s);
        }
        reader.close();
        assertEquals(NUM_CHUNKS, sm.chunks);      
        localfs.delete(tmpFile);
      } catch(IOException e) {
        e.printStackTrace();
      }
      
   }
 
 }