import java.util.*;

import java.io.*;

public class ThesaurusTester
{
	protected Thesaurus thesaurus;

   	protected BufferedReader keyboardReader;

	
	/** 
	 *  Initializes this ThesaurusTester object.
	 *
	 */
	public ThesaurusTester()
	{
	         thesaurus = new Thesaurus();
        	 keyboardReader = new BufferedReader (new InputStreamReader (System.in));
	} // default constructor


	/**
	 *  Constructs this ThesaurusTester from a path read in from the keyboard.
	 *  The worstTime(n) is O(n log n).
	 *
	 */ 	
    	public void constructThesaurus()
	{
	        final String FILE_PROMPT = 
			"\nPlease enter the path for the thesaurus file: ";

        	final String NO_INPUT_FILE_FOUND_MESSAGE =
            		"Error: there is no file with that path.\n\n";

	        BufferedReader fileReader;

        	String inFilePath,
                       line;

        	boolean pathOK = false;

        	while (!pathOK)
        	{
            		try
            		{
                		System.out.print (FILE_PROMPT);
                		inFilePath = keyboardReader.readLine();
                		fileReader = new BufferedReader (new FileReader (inFilePath));
                		pathOK = true;
                		while (true)
	     	    		{
		   			line = fileReader.readLine();
		   			if (line == null)
						break;  
                        		thesaurus.add (line);
	      			} // while not at end of file                
            		} // try
            		catch (IOException e)
            		{
                		System.out.println (e);
            		} // catch
        	} // while !pathOK
	} // method constructThesaurus


	/**
	 *  Prints the synonyms of each word entered from the keyboard, or a
	 *  no-synonyms-found message.
	 *  The worstTime(n, m) is O(m log n), where n is the number of lines in 
 	 *  the thesaurus file, and m is the number of words entered from the 
	 *  keyboard.
	 *
	 */	
	public void printSynonyms() 
	{
         	final String SENTINEL = "***";

	        final String WORD_PROMPT = "\n\nPlease enter the sentinel (" +
         		SENTINEL + ") or a word: ";         

	        final String WORD_NOT_FOUND_MESSAGE =
             		"That word does not appear in the thesaurus.";

	        final String SYNONYM_MESSAGE = "The synonyms of that word are ";

	        String word;

         	LinkedList<String> synonymList;

         	while (true)
         	{
	  		try
	  		{
 				System.out.print (WORD_PROMPT);
                  		word = keyboardReader.readLine();
                  		if (word.equals (SENTINEL))
                         		break;
                  		synonymList = thesaurus.getSynonyms (word);
                  		if (synonymList == null)
                        		System.out.println (WORD_NOT_FOUND_MESSAGE);
                  		else
                        		System.out.println (SYNONYM_MESSAGE + synonymList);
	  		} // try
	  		catch (IOException e)
	  		{
				System.out.println (e);
	  		} // catch
         	} // while
	} // printSynonyms

} // class ThesaurusTester