foul-magics/Mage/src/main/java/mage/abilities/keyword/WardAbility.java

package mage.abilities.keyword;

import mage.abilities.TriggeredAbilityImpl;
import mage.abilities.costs.Cost;
import mage.abilities.costs.mana.ManaCost;
import mage.abilities.dynamicvalue.DynamicValue;
import mage.abilities.effects.common.CounterUnlessPaysEffect;
import mage.abilities.icon.CardIconImpl;
import mage.abilities.icon.CardIconType;
import mage.constants.Zone;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.stack.StackObject;
import mage.target.targetpointer.FixedTarget;
import mage.util.CardUtil;

/**
 * @author TheElk801
 */
public class WardAbility extends TriggeredAbilityImpl {

    private final Cost cost;
    private final DynamicValue genericMana;
    private final boolean showAbilityHint;
    private final String whereXIs;

    public WardAbility(Cost cost) {
        this(cost, true);
    }

    public WardAbility(Cost cost, boolean showAbilityHint) {
        super(Zone.BATTLEFIELD, new CounterUnlessPaysEffect(cost), false);
        this.cost = cost;
        this.genericMana = null;
        this.showAbilityHint = showAbilityHint;
        this.whereXIs = null;

        this.addIcon(new CardIconImpl(CardIconType.ABILITY_HEXPROOF,
                CardUtil.getTextWithFirstCharUpperCase(getRuleWithoutHint())));
    }

    public WardAbility(DynamicValue genericMana) {
        this(genericMana, null);
    }

    public WardAbility(DynamicValue genericMana, String whereXIs) {
        super(Zone.BATTLEFIELD, new CounterUnlessPaysEffect(genericMana), false);
        this.genericMana = genericMana;
        this.whereXIs = whereXIs;
        this.cost = null;
        this.showAbilityHint = false;

        this.addIcon(new CardIconImpl(CardIconType.ABILITY_HEXPROOF,
                CardUtil.getTextWithFirstCharUpperCase(getRuleWithoutHint())));
    }

    private WardAbility(final WardAbility ability) {
        super(ability);
        if (ability.cost != null) {
            this.cost = ability.cost.copy();
            this.genericMana = null;
        } else {
            this.genericMana = ability.genericMana.copy();
            this.cost = null;
        }
        this.showAbilityHint = ability.showAbilityHint;
        this.whereXIs = ability.whereXIs;
    }

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

    @Override
    public boolean checkTrigger(GameEvent event, Game game) {
        if (!getSourceId().equals(event.getTargetId())) {
            return false;
        }
        StackObject targetingObject = CardUtil.getTargetingStackObject(event, game);
        if (targetingObject == null || !game.getOpponents(getControllerId()).contains(targetingObject.getControllerId())) {
            return false;
        }
        if (CardUtil.checkTargetedEventAlreadyUsed(this.id.toString(), targetingObject, event, game)) {
            return false;
        }
        getEffects().setTargetPointer(new FixedTarget(targetingObject.getId()));
        return true;
    }

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

    public String getRuleWithoutHint() {
        StringBuilder sb = new StringBuilder("ward");
        if (cost != null) {
            if (cost instanceof ManaCost) {
                sb.append(' ').append(cost.getText());
            } else {
                sb.append("—").append(CardUtil.getTextWithFirstCharUpperCase(cost.getText())).append('.');
            }
        } else {
            sb.append(" {X}");
            if (whereXIs != null) {
                sb.append(", where X is ").append(whereXIs).append('.');
            }
        }

        return sb.toString();
    }

    @Override
    public String getRule() {
        String rule = getRuleWithoutHint();

        if (!showAbilityHint) {
            return rule;
        }

        StringBuilder sb = new StringBuilder(rule);
        sb.append(" <i>(Whenever this creature becomes the target of a spell or ability an opponent controls, " +
                "counter it unless that player ");
        if (cost != null) {
            if (cost instanceof ManaCost) {
                sb.append("pays ").append(cost.getText());
            } else {
                sb.append(cost.getText().replace("pay ", "pays "));
            }
            sb.append(".)</i>");
        } else {
            sb.append("pays {X}");
            if (whereXIs != null) {
                sb.append(whereXIs);
            }
            sb.append(".)</i>");
        }

        return sb.toString();
    }
}