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package mage.abilities.effects.common.continious;

import mage.Constants.Duration;
import mage.Constants.Layer;
import mage.Constants.Outcome;
import mage.Constants.SubLayer;
import mage.abilities.Ability;
import mage.abilities.Mode;
import mage.abilities.effects.ContinuousEffectImpl;
import mage.game.Game;
import mage.game.permanent.Permanent;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import java.util.UUID;

/**
 * @author magenoxx_at_googlemail.com
 */
public class ExchangeControlTargetEffect extends ContinuousEffectImpl<ExchangeControlTargetEffect> {

    private String rule;

    public ExchangeControlTargetEffect(Duration duration, String rule) {
        super(duration, Layer.ControlChangingEffects_2, SubLayer.NA, Outcome.GainControl);
        this.rule = rule;
    }

    public ExchangeControlTargetEffect(final ExchangeControlTargetEffect effect) {
        super(effect);
        this.rule = effect.rule;
    }

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

    @Override
    public boolean apply(Game game, Ability source) {
        Set<UUID> controllers = new HashSet<UUID>();
        for (UUID permanentId : targetPointer.getTargets(game, source)) {
            Permanent permanent = game.getPermanent(permanentId);
            if (permanent != null) {
                controllers.add(permanent.getControllerId());
            }
        }
        // exchange works only for two different controllers
        if (controllers.size() != 2) {
            // discard effect
            this.discarded = true;
            return false;
        }

        Iterator<UUID> it = controllers.iterator();
        UUID firstController = it.next();
        UUID secondController = it.next();

        for (UUID permanentId : targetPointer.getTargets(game, source)) {
            Permanent permanent = game.getPermanent(permanentId);
            if (permanent != null) {
                permanent.changeControllerId(permanent.getControllerId().equals(firstController) ? secondController : firstController, game);
            }
        }

        return true;
    }

    @Override
    public String getText(Mode mode) {
        return this.rule;
    }
}