import java.io.*;

import java.util.*;

public class SpellCheckerTester
{
	protected SpellChecker spellChecker;


	/**
 	 *  Initializes this SpellCheckerTester object.
 	 *
 	 */
	public SpellCheckerTester ()
	{
        	spellChecker = new SpellChecker();
	} // default constructor


	/**
 	 *  Reads in and save a file of a specified type (“dictionary” or “document”).
 	 *  The worstTime(t) is O(t log t), where t is the number of lines in the file.
 	 *
 	 *  @param fileType - a String object representing the type of file, 
 	 *                 “dictionary” or “document”, to be read in.
 	 *
 	 */
	public void readFile (String fileType)
	{
	        final String FILE_PROMPT = 
			"\nPlease enter the path for the " + fileType + " file: ";

        	final String DICTIONARY = "dictionary";

        	BufferedReader keyboardReader = new BufferedReader
                                        (new InputStreamReader (System.in)),
                               fileReader;

	        String filePath,
                       line;

	        boolean pathOK = false;

	        while (!pathOK)
        	{
	            	try
            		{
                		System.out.print (FILE_PROMPT);
                		filePath = keyboardReader.readLine();
                		fileReader = new BufferedReader (new FileReader (filePath));
                		pathOK = true;
                
	          		while (true)
	     	    		{
		   			line = fileReader.readLine();
		   			if (line == null)
						break; 	
		                        if (fileType.equals (DICTIONARY))
                		                spellChecker.addToDictionarySet (line);
                        		else
                                		spellChecker.addToDocumentSet (line);
         			} // while not at end of file                 
            		} // try
            		catch (IOException e)
            		{
                		System.out.println (e);
            		} // catch IOException
        	} // while
	} // method readFile


	/**
 	 *  Prints the misspelled words - those that are in the document set but not
 	 *  in the dictionary set.  
 	 *  The worstTime(m, n) is O(m log n), where m is the number of words in 
 	 *  the document set and n is the number of words in the dictionary set.
 	 *
 	 */ 
	public void printResults()
	{
        	final String ALL_CORRECT =
            		"\n\nAll the words are spelled correctly.";

	        final String MISSPELLED =
            		"\n\nThe following words are misspelled:";

	        LinkedList<String> misspelled = spellChecker.compare();
        	if (misspelled == null)
            		System.out.println (ALL_CORRECT);
        	else
            		System.out.println (MISSPELLED + misspelled);
	} // method printResults

} // class SpellCheckerTester