foul-magics/Mage.Sets/src/mage/sets/magic2013/OdricMasterTactician.java

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 *        of conditions and the following disclaimer in the documentation and/or other materials
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package mage.sets.magic2013;

import mage.Constants;
import mage.Constants.CardType;
import mage.Constants.Rarity;
import mage.MageInt;
import mage.abilities.Ability;
import mage.abilities.TriggeredAbilityImpl;
import mage.abilities.effects.ReplacementEffectImpl;
import mage.abilities.keyword.FirstStrikeAbility;
import mage.cards.CardImpl;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.players.Player;

import java.util.UUID;

/**
 * @author noxx
 */
public class OdricMasterTactician extends CardImpl<OdricMasterTactician> {

    public OdricMasterTactician(UUID ownerId) {
        super(ownerId, 23, "Odric, Master Tactician", Rarity.RARE, new CardType[]{CardType.CREATURE}, "{2}{W}{W}");
        this.expansionSetCode = "M13";
        this.supertype.add("Legendary");
        this.subtype.add("Human");
        this.subtype.add("Soldier");

        this.color.setWhite(true);
        this.power = new MageInt(3);
        this.toughness = new MageInt(4);

        // First strike
        this.addAbility(FirstStrikeAbility.getInstance());

        // Whenever Odric, Master Tactician and at least three other creatures attack, you choose which creatures block this combat and how those creatures block.
        this.addAbility(new OdricMasterTacticianTriggeredAbility());
    }

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

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

class OdricMasterTacticianTriggeredAbility extends TriggeredAbilityImpl<OdricMasterTacticianTriggeredAbility> {

    public OdricMasterTacticianTriggeredAbility() {
        super(Constants.Zone.BATTLEFIELD, new OdricMasterTacticianEffect());
    }

    public OdricMasterTacticianTriggeredAbility(final OdricMasterTacticianTriggeredAbility ability) {
        super(ability);
    }

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

    @Override
    public boolean checkTrigger(GameEvent event, Game game) {
        if (event.getType() == GameEvent.EventType.DECLARED_ATTACKERS) {
            resetEffect();
            if (game.getCombat().getAttackers().size() >= 4 && game.getCombat().getAttackers().contains(this.sourceId)) {
                enableEffect();
                return true;
            }
        }
        return false;
    }

    @Override
    public void reset(Game game) {
        resetEffect();
    }

    private void resetEffect() {
        getEffects().get(0).setValue("apply_" + sourceId, false);
    }

    private void enableEffect() {
        getEffects().get(0).setValue("apply_" + sourceId, true);
    }

    @Override
    public String getRule() {
        return "Whenever Odric, Master Tactician and at least three other creatures attack, you choose which creatures block this combat and how those creatures block";
    }

}

class OdricMasterTacticianEffect extends ReplacementEffectImpl<OdricMasterTacticianEffect> {

    public OdricMasterTacticianEffect() {
        super(Constants.Duration.WhileOnBattlefield, Constants.Outcome.Benefit);
    }

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

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

    @Override
    public boolean apply(Game game, Ability source) {
        return false;
    }

    @Override
    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
        Player player = game.getPlayer(source.getControllerId());
        //20101001 - 509.1c
        game.getCombat().checkBlockRequirementsBefore(player, game);
        for (UUID defenderId : game.getCombat().getPlayerDefenders(game)) {
            boolean choose = true;
            while (choose) {
                game.getPlayer(source.getControllerId()).selectBlockers(game, defenderId);
                if (game.isPaused() || game.isGameOver()) {
                    return true;
                }
                game.getCombat().checkBlockRestrictions(game.getPlayer(defenderId), game);
                choose = !game.getCombat().checkBlockRequirementsAfter(game.getPlayer(defenderId), player, game);
            }
            game.fireEvent(GameEvent.getEvent(GameEvent.EventType.DECLARED_BLOCKERS, defenderId, defenderId));
        }

        return true;
    }

    @Override
    public boolean applies(GameEvent event, Ability source, Game game) {
        if (event.getType() == GameEvent.EventType.DECLARING_BLOCKERS) {
            Object object = getValue("apply_" + source.getSourceId());
            if (object != null && object instanceof Boolean) {
                if ((Boolean)object) {
                    return true; // replace event
                }
            }
        }

        return false;
    }
}