/*
    * 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.
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  package org.apache.hadoop.chukwa.util;
  
  import junit.framework.TestCase;
  import java.io.File;
  import java.util.ArrayList;
  import java.util.Calendar;
  import java.util.List;
  import java.io.IOException;
  
  import org.apache.hadoop.chukwa.ChukwaArchiveKey;
  import org.apache.hadoop.chukwa.ChunkImpl;
  import org.apache.hadoop.chukwa.util.CopySequenceFile;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.fs.FSDataOutputStream;
  import org.apache.hadoop.fs.FileSystem;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.io.SequenceFile;
  
  public class TestCopySequenceFile extends TestCase {
    File doneFile = null;
    File tempDir = null;
    String tempFileName = null;
  	
    public void testCopySequenceFile() throws IOException {
      //Create a .chukwa sequence file 
  	  
      tempDir = new File(System.getProperty("test.build.data", "/tmp"));
      File tempFile = File.createTempFile("testcopy", ".chukwa", tempDir); 
      tempFile.deleteOnExit(); // Will delete this file if test fails and file is not renamed to .done
      tempFileName=tempFile.getName();
      Configuration conf = new Configuration();
      Path path = new Path(tempFile.getAbsolutePath());
      List<ChunkImpl> chunks = new ArrayList<ChunkImpl>();
      byte[] dat = "test".getBytes();
      
      ChunkImpl c = new ChunkImpl("Data", "aname", dat.length, dat, null);
      chunks.add(c);
      
      dat = "ing".getBytes();
      c = new ChunkImpl("Data", "aname", dat.length+4, dat, null);
      chunks.add(c);
      
      //Utilize the writeSeqFile method to create a valid .chukwa sequence file
      
      writeSeqFile(conf, FileSystem.getLocal(conf), path, chunks);
      
      //Call CopySequenceFile to convert .chukwa to .done
      
      CopySequenceFile.createValidSequenceFile(conf, tempDir.getAbsolutePath(), tempFile.getName(), FileSystem.getLocal(conf));
  	
      //Assert that the chukwa file has been deleted
      
  	assertFalse("File " + tempFile.getAbsolutePath() + " has not been deleted", tempFile.exists()) ; 
  	
  	String doneFilePath= tempDir.getAbsolutePath()+"/"+tempFileName.replace(".chukwa", ".done");
  	doneFile= new File(doneFilePath);
  	
  	//Assert that the done file has been created
  	
      assertTrue("File " + doneFilePath + " has not been created", doneFile.exists()); 
  		
    }
    public static void writeSeqFile(Configuration conf, FileSystem fileSys, Path dest,
  	                              List<ChunkImpl> chunks) throws IOException {
      FSDataOutputStream out = fileSys.create(dest);
  
  	Calendar calendar = Calendar.getInstance();
  	SequenceFile.Writer seqFileWriter = SequenceFile.createWriter(conf, out,
  	                                    ChukwaArchiveKey.class, ChunkImpl.class,
  	                                    SequenceFile.CompressionType.NONE, null);
  	    
  	for (ChunkImpl chunk: chunks) {
  	  ChukwaArchiveKey archiveKey = new ChukwaArchiveKey();
  	      
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        archiveKey.setTimePartition(calendar.getTimeInMillis());
        
        archiveKey.setDataType(chunk.getDataType());
        archiveKey.setStreamName(chunk.getStreamName());
        archiveKey.setSeqId(chunk.getSeqID());
        seqFileWriter.append(archiveKey, chunk);
 	}
     seqFileWriter.close();
     out.close();
   }
   protected void tearDown() {
 	if (doneFile != null && doneFile.exists()){
 		  doneFile.delete();
 		} else { //Cleanup any files that may have been created during a failed copy attempt 
 			File recoverFile = new File(tempDir.getAbsolutePath()+"/"+tempFileName.replace(".chukwa", ".recover"));
 			if (recoverFile.exists()){
 			  recoverFile.delete();
 			} else {
 			    File recoverDoneFile = new File(tempDir.getAbsolutePath()+"/"+tempFileName.replace(".chukwa", ".recoverDone"));
 			    if (recoverDoneFile.exists()){
 			      recoverDoneFile.delete();
 			    }
 			  }
 		 }
   }
 }