package org.bukkit.permissions;

import java.util.HashMap;
import java.util.Map;

/**
 * Represents the possible default values for permissions
 */
public enum PermissionDefault
{
	TRUE("true"),
	FALSE("false"),
	OP("op", "isop", "operator", "isoperator", "admin", "isadmin"),
	NOT_OP("!op", "notop", "!operator", "notoperator", "!admin", "notadmin");

	private final String[] names;
	private final static Map<String, PermissionDefault> lookup = new HashMap<String, PermissionDefault>();

	private PermissionDefault(String... names)
	{
		this.names = names;
	}

	/**
	 * Calculates the value of this PermissionDefault for the given operator
	 * value
	 *
	 * @param op If the target is op
	 * @return True if the default should be true, or false
	 */
	public boolean getValue(boolean op)
	{
		switch(this)
		{
		case TRUE:
			return true;
		case FALSE:
			return false;
		case OP:
			return op;
		case NOT_OP:
			return !op;
		default:
			return false;
		}
	}

	/**
	 * Looks up a PermissionDefault by name
	 *
	 * @param name Name of the default
	 * @return Specified value, or null if not found
	 */
	public static PermissionDefault getByName(String name)
	{
		return lookup.get(name.toLowerCase().replaceAll("[^a-z!]", ""));
	}

	@Override
	public String toString()
	{
		return names[0];
	}

	static
	{
		for(PermissionDefault value : values())
		{
			for(String name : value.names)
			{
				lookup.put(name, value);
			}
		}
	}
}