import java.util.Scanner;
import java.io.FileWriter;
import java.io.IOException;

public class TestSentences
{
  public static void main( String[] args )
  {
    // setup
    final int numQuestions = 50;
    long   startTime  = 0;
    long   estTime    = 0;
    long   avgTime    = 0;
    int    numWords   = 0;
    int    numLetters = 0;
    double avgWords   = 0;
    double avgLetters = 0.0;
    Scanner    input = new Scanner( System.in );
    FileWriter fileout = null;
    Sentences mysents = new Sentences( "greatexpectations.txt" );
    mysents.processByLine();
    System.out.println( "" );

    // create data file
    System.out.println( "Enter your student number: " );
    int id = input.nextInt();
    input.nextLine();
    int time = ( int )( System.currentTimeMillis() );
    String filename = "" + id + "_" + time + "_read.txt";
    System.out.println( "" );

    // instructions
    System.out.println( "You will be presented with 50 sentences from a novel. " );
    System.out.println( "Read each sentence as carefully as you can. " );
    System.out.println( "(You may want to read aloud to yourself -- but if you do this, do this for every sentence.) " );
    System.out.println( "After each sentence, press a key to go onto the next sentence. " );
    System.out.println( "When you are done, submit the log file that has been generated. " );
    System.out.println( "" );

    System.out.println( "When you are ready to start, press any key." );
    String tmp = input.nextLine();
    System.out.println( "" );

    try
    {
      fileout = new FileWriter( filename );
      for( int i=0; i<numQuestions; i++ )
      {
        // get a sentence
        String str = mysents.getRandomLine();
        numWords   = countWords( str );
        numLetters = countLetters( str );
    
        // ask user for answer
        System.out.println( "Read sentence " + (i+1) + ": " ); 
        System.out.println( str );
        System.out.println( "" );
        startTime = System.nanoTime();
        System.out.println( "Press any key when you are done." );
        tmp = input.nextLine();
        System.out.println( "" );
        estTime = System.nanoTime() - startTime;

        // write to log
        fileout.write( "Sentence " + (i+1) + ":\n" );
        fileout.write( "  Number of words in sentence: " + numWords + "\n" );
        fileout.write( "  Number of letters in sentence: " + numLetters + "\n" );
        fileout.write( "  Estimated task time (ns): " + estTime + "\n" );
        avgTime    += estTime;
        avgWords   += numWords;
        avgLetters += numLetters / numWords;
      }
  
      // write summary log
      fileout.write( "Number Sentences Read: " + numQuestions + "\n" );
      avgTime    = avgTime    / numQuestions;
      avgWords   = avgWords   / numQuestions;
      avgLetters = avgLetters / numQuestions;
      fileout.write( "Aerage Number of Words per Sentence: "    + avgWords + "\n" );
      fileout.write( "Aerage Number of Letters per Word: "      + avgLetters + "\n" );
      fileout.write( "Aerage Response Time Per Sentence (ns): " + avgTime + "\n" );
    }
    catch( IOException e )
    {
      e.printStackTrace();
    }
    finally
    {
      try
      {
        fileout.close();
        System.out.println( "Your results are logged in " + filename + "." );
      }
      catch( IOException e )
      {
        System.err.println( fileout + " could not be closed" );
        e.printStackTrace();
      }
    }
  }

  public static int countWords( String sentence )
  {
    String delims = " ";
    String[] tokens = sentence.split( delims );
    return tokens.length;
  }

  public static int countLetters( String sentence )
  {
    String str = sentence.replaceAll( "[^a-zA-Z ]", "" );
    return str.length();
  }
}