/*
  TODO: Implement the Doublable interface. A word is doubled by
  repeating it. For example, new Word("Java").makeDouble() should
  return a word containing "JavaJava".

  This is the Word class from ch06/debugger (with the bugs fixed).
*/


/**
   This class describes words in a document.
*/
public class Word implements Doublable
{
   public Doublable makeDouble()
   {
      Word w = new Word(String.format("%s%s", text, text));
      return w;
   }
   /**
      Constructs a word by removing leading and trailing non-
      letter characters, such as punctuation marks.
      @param s the input string
   */
   public Word(String s)
   {
      int i = 0;
      while (i < s.length() && !Character.isLetter(s.charAt(i)))
         i++;
      int j = s.length() - 1;
      while (j > i && !Character.isLetter(s.charAt(j)))
         j--;
      text = s.substring(i, j + 1);
   }

   /**
      Returns the text of the word, after removal of the
      leading and trailing non-letter characters.
      @return the text of the word
   */
   public String toString()
   {
      return text;
   }

   /**
      Counts the syllables in the word.
      @return the syllable count
   */
   public int countSyllables()
   {
      int count = 0;
      int end = text.length() - 1;
      if (end < 0) return 0; // The empty string has no syllables

      // An e at the end of the word doesn't count as a vowel
      char ch = Character.toLowerCase(text.charAt(end));
      if (ch == 'e') end--;

      boolean insideVowelGroup = false;
      for (int i = 0; i <= end; i++)
      {
         ch = Character.toLowerCase(text.charAt(i));
         String vowels = "aeiouy";
         if (vowels.indexOf(ch) >= 0)
         {
            // ch is a vowel
            if (!insideVowelGroup)
            {
               // Start of new vowel group
               count++;
               insideVowelGroup = true;
            }
         }
         else insideVowelGroup = false;
      }

      // Every word has at least one syllable
      if (count == 0)
         count = 1;

      return count;
   }

   private String text;
}