Package mage.sets.worldwake

Source Code of mage.sets.worldwake.PermafrostTrapAlternativeCost

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package mage.sets.worldwake;

import java.util.UUID;

import mage.constants.CardType;
import mage.constants.Rarity;
import mage.ObjectColor;
import mage.abilities.Ability;
import mage.abilities.costs.AlternativeCostImpl;
import mage.abilities.costs.mana.ColoredManaCost;
import mage.abilities.effects.OneShotEffect;
import mage.abilities.effects.common.SkipNextUntapTargetEffect;
import mage.cards.CardImpl;
import mage.constants.*;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.permanent.Permanent;
import mage.target.common.TargetCreaturePermanent;
import mage.target.targetpointer.FixedTarget;
import mage.watchers.Watcher;

/**
*
* @author jeffwadsworth
*/
public class PermafrostTrap extends CardImpl {

    public PermafrostTrap(UUID ownerId) {
        super(ownerId, 34, "Permafrost Trap", Rarity.UNCOMMON, new CardType[]{CardType.INSTANT}, "{2}{U}{U}");
        this.expansionSetCode = "WWK";
        this.subtype.add("Trap");

        this.color.setBlue(true);

        // If an opponent had a green creature enter the battlefield under his or her control this turn, you may pay {U} rather than pay Permafrost Trap's mana cost.
        this.getSpellAbility().addAlternativeCost(new PermafrostTrapAlternativeCost());

        // Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.
        TargetCreaturePermanent target = new TargetCreaturePermanent(0, 2);
        this.getSpellAbility().addTarget(target);
        this.getSpellAbility().addEffect(new PermafrostTrapEffect());

        this.addWatcher(new PermafrostTrapWatcher());
    }

    public PermafrostTrap(final PermafrostTrap card) {
        super(card);
    }

    @Override
    public PermafrostTrap copy() {
        return new PermafrostTrap(this);
    }
}

class PermafrostTrapWatcher extends Watcher {

    public PermafrostTrapWatcher() {
        super("PermafrostTrapWatcher", WatcherScope.GAME);
    }

    public PermafrostTrapWatcher(final PermafrostTrapWatcher watcher) {
        super(watcher);
    }

    @Override
    public PermafrostTrapWatcher copy() {
        return new PermafrostTrapWatcher(this);
    }

    @Override
    public void watch(GameEvent event, Game game) {
        if (condition == true) { // no need to check - condition has already occured
            return;
        }
        if (event.getType() == GameEvent.EventType.ENTERS_THE_BATTLEFIELD) {
            Permanent perm = game.getPermanent(event.getTargetId());
            if (perm.getCardType().contains(CardType.CREATURE) && perm.getColor().contains(ObjectColor.GREEN) && !perm.getControllerId().equals(controllerId)) {
                condition = true;
            }
        }
    }

    @Override
    public void reset() {
        super.reset();
        condition = false;
    }
}

class PermafrostTrapAlternativeCost extends AlternativeCostImpl {

    public PermafrostTrapAlternativeCost() {
        super("you may pay {U} rather than pay Permafrost Trap's mana cost");
        this.add(new ColoredManaCost(ColoredManaSymbol.U));
    }

    public PermafrostTrapAlternativeCost(final PermafrostTrapAlternativeCost cost) {
        super(cost);
    }

    @Override
    public PermafrostTrapAlternativeCost copy() {
        return new PermafrostTrapAlternativeCost(this);
    }

    @Override
    public boolean isAvailable(Game game, Ability source) {
        PermafrostTrapWatcher watcher = (PermafrostTrapWatcher) game.getState().getWatchers().get("PermafrostTrapWatcher");
        if (watcher != null && watcher.conditionMet()) {
            return true;
        }
        return false;
    }

    @Override
    public String getText() {
        return "If an opponent had a green creature enter the battlefield under his or her control this turn, you may pay {U} rather than pay Permafrost Trap's mana cost";
    }
}

class PermafrostTrapEffect extends OneShotEffect {

    public PermafrostTrapEffect() {
        super(Outcome.Detriment);
        staticText = "Tap up to two target creatures. Those creatures don't untap during their controller's next untap step";
    }

    public PermafrostTrapEffect(final PermafrostTrapEffect effect) {
        super(effect);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        for (UUID targetId : this.targetPointer.getTargets(game, source)) {
            Permanent creature = game.getPermanent(targetId);
            if (creature != null) {
                creature.tap(game);
                SkipNextUntapTargetEffect effect = new SkipNextUntapTargetEffect();
                effect.setTargetPointer(new FixedTarget(targetId));
                game.addEffect(effect, source);
            }
        }
        return false;
    }

    @Override
    public PermafrostTrapEffect copy() {
        return new PermafrostTrapEffect(this);
    }
}
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