package mage.abilities.effects.common;

import mage.abilities.Ability;
import mage.abilities.effects.ReplacementEffectImpl;
import mage.cards.Card;
import mage.constants.Duration;
import mage.constants.Outcome;
import mage.constants.Zone;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.events.GameEvent.EventType;
import mage.game.events.ZoneChangeEvent;
import mage.game.stack.StackObject;
import mage.players.Player;

/**
 *
 * @author LoneFox
 */
public class DiscardOntoBattlefieldEffect extends ReplacementEffectImpl {

    public DiscardOntoBattlefieldEffect() {
        super(Duration.EndOfGame, Outcome.PutCardInPlay);
        staticText = "If a spell or ability an opponent controls causes you to discard {this}, put it onto the battlefield instead of putting it into your graveyard";
    }

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

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

    @Override
    public boolean checksEventType(GameEvent event, Game game) {
        return event.getType() == EventType.ZONE_CHANGE;
    }

    @Override
    public boolean applies(GameEvent event, Ability source, Game game) {
        if (event.getTargetId().equals(source.getSourceId())) {
            ZoneChangeEvent zcEvent = (ZoneChangeEvent) event;
            if (zcEvent.getFromZone() == Zone.HAND && zcEvent.getToZone() == Zone.GRAVEYARD) {
                StackObject spell = game.getStack().getStackObject(event.getSourceId());
                if (spell != null && game.getOpponents(source.getControllerId()).contains(spell.getControllerId())) {
                    return true;
                }
            }
        }
        return false;
    }

    @Override
    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
        Card card = game.getCard(source.getSourceId());
        if (card != null) {
            Player owner = game.getPlayer(card.getOwnerId());
            if (owner != null) {
                if (owner.moveCards(card, Zone.BATTLEFIELD, source, game)) {
                    return true;
                }
            }
        }
        return false;
    }

}