CostTypeCondition.java

package Roguelike.Ability.ActiveAbility.CostType;

import java.util.HashMap;

import net.objecthunter.exp4j.Expression;
import net.objecthunter.exp4j.ExpressionBuilder;
import Roguelike.Ability.ActiveAbility.ActiveAbility;

import com.badlogic.gdx.utils.XmlReader.Element;

import exp4j.Helpers.EquationHelper;

public class CostTypeCondition extends AbstractCostType
{
	private String[] reliesOn;
	private String equation;

	@Override
	public boolean isCostAvailable(ActiveAbility aa)
	{
		HashMap<String, Integer> variableMap = aa.getVariableMap();

		for (String name : reliesOn)
		{
			if (!variableMap.containsKey(name.toLowerCase()))
			{
				variableMap.put(name.toLowerCase(), 0);
			}
		}

		int raw = EquationHelper.evaluate( equation, variableMap );

		return raw > 0;
	}

	@Override
	public void spendCost(ActiveAbility aa)
	{

	}

	@Override
	public void parse(Element xml)
	{
		reliesOn = xml.getAttribute("ReliesOn", "").split(",");
		equation = xml.getText().toLowerCase();
	}

	@Override
	public AbstractCostType copy()
	{
		CostTypeCondition cost = new CostTypeCondition();

		cost.reliesOn = reliesOn;
		cost.equation = equation;

		return cost;
	}


	@Override
	public String toString(ActiveAbility aa)
	{
		String colour = isCostAvailable(aa) ? "[GREEN]" : "[RED]";
		return colour+"Requires "+equation+".";
	}

}