foul-magics/Mage/src/main/java/mage/abilities/effects/common/SacrificeEffect.java

package mage.abilities.effects.common;

import mage.abilities.Ability;
import mage.abilities.dynamicvalue.DynamicValue;
import mage.abilities.dynamicvalue.common.StaticValue;
import mage.abilities.effects.OneShotEffect;
import mage.constants.Outcome;
import mage.filter.FilterPermanent;
import mage.filter.predicate.permanent.ControllerIdPredicate;
import mage.game.Game;
import mage.game.permanent.Permanent;
import mage.players.Player;
import mage.target.Target;
import mage.target.TargetPermanent;
import mage.util.CardUtil;

import java.util.UUID;

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

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

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

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

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

    @Override
    public boolean apply(Game game, Ability source) {
        boolean applied = false;
        for (UUID playerId : targetPointer.getTargets(game, source)) {
            Player player = game.getPlayer(playerId);
            if (player != null) {
                FilterPermanent newFilter = filter.copy(); // filter can be static, so it's important to copy here
                newFilter.add(new ControllerIdPredicate(player.getId()));
                int amount = count.calculate(game, source, this);
                int realCount = game.getBattlefield().countAll(newFilter, player.getId(), game);
                amount = Math.min(amount, realCount);
                Target target = new TargetPermanent(amount, amount, newFilter, true);
                if (amount > 0 && target.canChoose(player.getId(), source, game)) {
                    while (!target.isChosen()
                            && target.canChoose(player.getId(), source, game)
                            && player.canRespond()) {
                        player.chooseTarget(Outcome.Sacrifice, target, source, game);
                    }
                    for (int idx = 0; idx < target.getTargets().size(); idx++) {
                        Permanent permanent = game.getPermanent(target.getTargets().get(idx));
                        if (permanent != null
                                && permanent.sacrifice(source, game)) {
                            applied = true;
                        }
                    }
                }
            }
        }
        return applied;
    }

    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") || preText.endsWith("controller"))) {
            sb.append(" sacrifices ");
        } else {
            if (preText == null || preText.isEmpty()) {
                sb.append("sacrifice ");
            } else {
                sb.append(" sacrifice ");
            }
        }
        if (count.toString().equals("1")) {
            sb.append(CardUtil.addArticle(filter.getMessage()));
        } else {
            sb.append(CardUtil.numberToText(count.toString(), "a"));
            sb.append(" ");
            sb.append(filter.getMessage());
        }
        staticText = sb.toString();
    }
}