import java.util.Scanner;


public class SpamFilterDriver
{
	private static SpamFilter filter;
	private static final String FILENAME = "SpamFilter.obj";
	private static final float SPAM_RATIO = (float) 0.05;
	
	static Scanner input = new Scanner(System.in);
	
	/**
	 * Main method. It calls the menu() method to obtain the user's selection
	 * and then makes a decison based upon the user's selection.
	 * @param args
	 * 	Standard main method parameter, unused. 
	 */
	public static void main(String[] args)
	{
		boolean loop = true;
		
		while(loop)
		{
			char selection = menu();
			
			switch(selection)
			{
				case 'C':
					checkEmail();
					break;
				case 'I':
					insertWord();
					break;
				case 'R':
					removeWord();
					break;
				case 'S':
					searchWord();
					break;
				case 'Q':
					loop = false;
					break;
				default:
					System.out.println("Invalid Selection!\n\n");
					break;
			}
		}
	}
	
	/**
	 * Prints a menu and asks for a user's selection
	 * @return
	 * returns the user's selection.
	 */
	private static char menu()
	{
		System.out.print("Welcome to the Spaminator\nPlease select an option:\n\n" +
				"C: Check Email\nI: Insert Word\nR: Remove Word\nS: Search For Word\n" +
				"Q: Quit\n\nSelection:");
		String temp = input.nextLine().trim();
		if (temp.length() == 1)
		{
			char answer = temp.charAt(0);
			answer = Character.toUpperCase(answer);
			return answer;
		}
		else return 'z'; // arbitrary invalid selection
	}
	/**
	 * Searches for a specified word in the hash table and prints a message
	 * that lets the user know if the word is or is not in the table.
	 */
	private static void searchWord()
  {
	  System.out.print("Word to find: ");
	  String checkMe = input.nextLine();
		
	  	boolean isFound = filter.isBadWord(checkMe);
	  
	  if(isFound)
	  	System.out.println(checkMe + " is a bad word");
	  else
	  	System.out.println(checkMe + "was not found in the list of bad words");	
  }
/**
 * Removes a word from the hash table. If the element to be removed is not 
 * found, it prints an error message instead.
 */
	private static void removeWord()
  {
		System.out.print("Word to remove: ");
	  String removeMe = input.nextLine();
	  
	  try
    {
	    filter.remove(removeMe);
	    System.out.println(removeMe + " was successfully rmoved from the list" +
	    		" of bad words.");
    }
    catch (ElementNotFoundException e)
    {
	    System.out.println(e.getMessage());
    }
	  
  }
	
/**
 * Inserts a word into the hash table.
 */
	private static void insertWord()
  {
		System.out.print("Word to insert: ");
	  String insertMe = input.nextLine();
	  
	  filter.insert(insertMe);
	  System.out.println(insertMe + " added successfully!");
  }

	private static void checkEmail()
  {
	  // TODO Auto-generated method stub
	  
  }

	
	
	private static void loadFilter()
	{
		//TODO
	}
	
	private static void  saveFilter()
	{
		//TODO
	}
}