mage/Mage/src/mage/abilities/effects/common/SacrificeEffect.java

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package mage.abilities.effects.common;

import mage.constants.Outcome;
import mage.abilities.Ability;
import mage.abilities.dynamicvalue.DynamicValue;
import mage.abilities.dynamicvalue.common.StaticValue;
import mage.abilities.effects.OneShotEffect;
import mage.constants.TargetController;
import mage.filter.FilterPermanent;
import mage.filter.predicate.permanent.ControllerPredicate;
import mage.game.Game;
import mage.game.permanent.Permanent;
import mage.players.Player;
import mage.target.Target;
import mage.target.common.TargetControlledPermanent;

import java.util.UUID;
import mage.util.CardUtil;

/**
 *
 * @author maurer.it_at_gmail.com
 */
public class SacrificeEffect extends OneShotEffect<SacrificeEffect>{

    private FilterPermanent filter;
    private String preText;
    private DynamicValue count;

    public SacrificeEffect ( FilterPermanent filter, DynamicValue count, String preText ) {
        super(Outcome.Sacrifice);
        this.filter = filter;
        this.count = count;
        this.preText = preText;
        setText();
    }

    public SacrificeEffect ( FilterPermanent filter, int count, String preText ) {
        this(filter, new StaticValue(count), preText);
    }

    public SacrificeEffect ( SacrificeEffect effect ) {
        super(effect);
        this.filter = effect.filter;
        this.count = effect.count;
        this.preText = effect.preText;
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Player player = game.getPlayer(targetPointer.getFirst(game, source));

        if (player == null) {
            return false;
        }

        filter.add(new ControllerPredicate(TargetController.YOU));

        int amount = count.calculate(game, source);
        int realCount = game.getBattlefield().countAll(filter, player.getId(), game);
        amount = Math.min(amount, realCount);

        Target target = new TargetControlledPermanent(amount, amount, filter, false);
        target.setRequired(true);

        //A spell or ability could have removed the only legal target this player
        //had, if thats the case this ability should fizzle.
        if (amount > 0 && target.canChoose(source.getSourceId(), player.getId(), game)) {
            boolean abilityApplied = false;
            while (!target.isChosen() && target.canChoose(player.getId(), game)) {
                player.choose(Outcome.Sacrifice, target, source.getSourceId(), game);
            }

            for ( int idx = 0; idx < target.getTargets().size(); idx++) {
                Permanent permanent = game.getPermanent((UUID)target.getTargets().get(idx));

                if ( permanent != null ) {
                    abilityApplied |= permanent.sacrifice(source.getSourceId(), game);
                }
            }

            return abilityApplied;
        }
        return false;
    }

    public void setAmount(DynamicValue amount) {
        this.count = amount;
    }

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

    private void setText() {
        StringBuilder sb = new StringBuilder();
        if (preText != null) {
            sb.append(preText);
        }
        if (preText != null && (preText.endsWith("player") || preText.endsWith("opponent"))) {
            sb.append(" sacrifices ");
        } else {
            sb.append(" sacrifice ");
        }
        if (!count.toString().equals("1")) {
            sb.append(CardUtil.numberToText(count.toString())).append(" ");
        } else {
            sb.append("a ");
        }
        sb.append(filter.getMessage());
        staticText = sb.toString();
    }
}