package mug13;

import java.util.Hashtable;

public class WorldBuilderObject
	implements WorldBuilder
{
//Fields
	Hashtable people;
	Hashtable places;
	Hashtable verbs;
	Hashtable things;
	
//methods

/**
	 * Add Person to world
	 */
	public void addPerson(Person bob)
		throws NameTakenException
	{
		if(! people.get(bob.getName()).equals(null))
		{
			throw new NameTakenException();
		}
		else if(! things.get(bob.getName()).equals(null))
		{
			throw new NameTakenException();
		}
		else
			people.put(bob.getName(), bob);
	}
	 
	/**
	 * Remove Person from world
	 */
	public void removePerson(String bob)
	{
		people.remove(bob);
	}
	/**
	 * Add Person to world
	 */
	public void addThing(Thing jim)
		throws NameTakenException
	{
		if(! people.get(jim.getName()).equals(null))
		{
			throw new NameTakenException();
		}
		else if(! things.get(jim.getName()).equals(null))
		{
			throw new NameTakenException();
		}
		else
			things.put(jim.getName(), jim);
	}
	 
	/**
	 * Remove Person from world
	 */
	public void removeThing(String jim)
	{
		things.remove(jim);
	}
	
	/**
	 * Add a new location.
	 */
	public void addLocation(Place loc)
	{
		places.put(loc.getName(),loc);
	}
	
	/**
	 * Remove an existing location.
	 */
	public void removeLocation(String loc)
	{
		places.remove(loc);
	}
	
	/**
	* Maps names to objects
	*/
	public Noun mapNoun(String name)
		throws NotHereException
	{
		try
		{
			Noun returned = (Noun) this.mapPlace(name);
			return returned;
		}
		
		catch(NotHereException e)
		{
			try
			{
				Noun returned = (Noun) this.mapThingPerson(name);
				return returned;
			}
			
			catch(NotHereException f)
			{
				throw f;
			}
		}
	}
	
	public Place mapPlace(String name)
		throws NotHereException
	{
		Place returned = (Place) this.places.get(name);
		
		if(returned == null)
			throw new NotHereException();
		
		return returned;
	}
	
	public ThingPerson mapThingPerson(String name)
		throws NotHereException
	{
		try
		{
			ThingPerson returned = (ThingPerson) this.mapPerson(name);
			return returned;
		}
		
		catch(NotHereException e)
		{
			try
			{
				ThingPerson returned = (ThingPerson) this.mapThing(name);
				return returned;
			}
			
			catch(NotHereException f)
			{
				throw f;
			}
		}
	}
	
	public Person mapPerson(String name)
		throws NotHereException
	{
		Person returned = (Person) this.people.get(name);
		
		if(returned == null)
			throw new NotHereException();
		
		return returned;
	}
	
	public Thing mapThing(String name)
		throws NotHereException
	{
		Thing returned = (Thing) this.things.get(name);
		
		if(returned == null)
			throw new NotHereException();
		
		return returned;
	}
	
	/**
	* Maps verb names to the appropriat verb
	*/
	public Verb mapVerb(String verb)
		throws InvalidVerbException
	{
		Verb actionTaken = (Verb) this.verbs.get(verb);
		
		if(actionTaken == null)
		{
			throw new InvalidVerbException();
		}
		
		else
			return actionTaken;
	}
	
}