/*
* Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
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*/
package mage.abilities.effects;
import mage.abilities.Ability;
import mage.abilities.dynamicvalue.DynamicValue;
import mage.constants.Duration;
import mage.constants.EffectType;
import mage.constants.Outcome;
import mage.game.Game;
import mage.game.events.DamageEvent;
import mage.game.events.GameEvent;
/**
*
* @author BetaSteward_at_googlemail.com
*/
public abstract class PreventionEffectImpl extends ReplacementEffectImpl implements PreventionEffect {
protected DynamicValue amountToPreventDynamic;
protected int amountToPrevent;
protected final boolean onlyCombat;
protected boolean consumable;
public PreventionEffectImpl(Duration duration) {
this(duration, Integer.MAX_VALUE, false);
}
public PreventionEffectImpl(Duration duration, int amountToPrevent, boolean onlyCombat) {
this(duration, amountToPrevent, onlyCombat, true);
}
public PreventionEffectImpl(Duration duration, int amountToPrevent, boolean onlyCombat, boolean consumable) {
this(duration, amountToPrevent, onlyCombat, consumable, null);
}
/**
*
* @param duration
* @param amountToPrevent
* @param onlyCombat
* @param consumable
* @param amountToPreventDynamic if set, on init amountToPrevent is set to
* calculated value of amountToPreventDynamic
*/
public PreventionEffectImpl(Duration duration, int amountToPrevent, boolean onlyCombat, boolean consumable, DynamicValue amountToPreventDynamic) {
super(duration, Outcome.PreventDamage);
this.effectType = EffectType.PREVENTION;
this.amountToPrevent = amountToPrevent;
this.amountToPreventDynamic = amountToPreventDynamic;
this.onlyCombat = onlyCombat;
this.consumable = consumable;
}
public PreventionEffectImpl(final PreventionEffectImpl effect) {
super(effect);
this.amountToPrevent = effect.amountToPrevent;
this.amountToPreventDynamic = effect.amountToPreventDynamic;
this.onlyCombat = effect.onlyCombat;
this.consumable = effect.consumable;
}
@Override
public void init(Ability source, Game game) {
super.init(source, game);
if (amountToPreventDynamic != null) {
amountToPrevent = amountToPreventDynamic.calculate(game, source, this);
}
}
@Override
public boolean apply(Game game, Ability source) {
// not used for prevention effect
return true;
}
protected PreventionEffectData preventDamageAction(GameEvent event, Ability source, Game game) {
PreventionEffectData preventionData = game.preventDamage(event, source, game, amountToPrevent);
if (!preventionData.isError() && !preventionData.isReplaced()) {
if (consumable) {
amountToPrevent = preventionData.getRemainingAmount();
}
if (amountToPrevent == 0) {
this.discard();
}
}
return preventionData;
}
@Override
public boolean replaceEvent(GameEvent event, Ability source, Game game) {
preventDamageAction(event, source, game);
// damage amount is reduced or set to 0 so complete replacement of damage event is never neccessary
return false;
}
@Override
public boolean checksEventType(GameEvent event, Game game) {
switch (event.getType()) {
case DAMAGE_CREATURE:
case DAMAGE_PLAYER:
case DAMAGE_PLANESWALKER:
return true;
}
return false;
}
@Override
public boolean applies(GameEvent event, Ability source, Game game) {
return event.getFlag() && (!onlyCombat || ((DamageEvent) event).isCombatDamage());
}
}