mage/Mage/src/mage/abilities/costs/common/DiscardTargetCost.java

/*
 *  Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without modification, are
 *  permitted provided that the following conditions are met:
 *
 *     1. Redistributions of source code must retain the above copyright notice, this list of
 *        conditions and the following disclaimer.
 *
 *     2. Redistributions in binary form must reproduce the above copyright notice, this list
 *        of conditions and the following disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 *  THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 *  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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package mage.abilities.costs.common;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import mage.abilities.Ability;
import mage.abilities.costs.CostImpl;
import mage.cards.Card;
import mage.constants.Outcome;
import mage.game.Game;
import mage.players.Player;
import mage.target.common.TargetCardInHand;

/**
 *
 * @author BetaSteward_at_googlemail.com
 */
public class DiscardTargetCost extends CostImpl {

    List<Card> cards = new ArrayList<>();
    protected boolean randomDiscard;

    public DiscardTargetCost(TargetCardInHand target) {
        this(target, false);
    }

    public DiscardTargetCost(TargetCardInHand target, boolean randomDiscard) {
        this.addTarget(target);
        this.randomDiscard = randomDiscard;
        this.text = "discard " + target.getTargetName();
    }

    public DiscardTargetCost(DiscardTargetCost cost) {
        super(cost);
        for (Card card : cost.cards) {
            this.cards.add(card.copy());
        }
        this.randomDiscard = cost.randomDiscard;
    }

    @Override
    public boolean pay(Ability ability, Game game, UUID sourceId, UUID controllerId, boolean noMana) {
        this.cards.clear();
        this.targets.clearChosen();;
        Player player = game.getPlayer(controllerId);
        if (player == null) {
            return false;
        }
        int amount = this.getTargets().get(0).getNumberOfTargets();
        if (randomDiscard) {
            this.cards.addAll(player.discard(amount, true, ability, game).getCards(game));
        } else {
            if (targets.choose(Outcome.Discard, controllerId, sourceId, game)) {
                for (UUID targetId : targets.get(0).getTargets()) {
                    Card card = player.getHand().get(targetId, game);
                    if (card == null) {
                        return false;
                    }
                    player.discard(card, ability, game);
                    this.cards.add(card.copy());
                }
            }
        }
        paid = cards.size() >= amount;
        return paid;
    }

    @Override
    public void clearPaid() {
        super.clearPaid();
        this.cards.clear();
        this.targets.clear();
    }

    @Override
    public boolean canPay(Ability ability, UUID sourceId, UUID controllerId, Game game) {
        return targets.canChoose(sourceId, controllerId, game);
    }

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

    public List<Card> getCards() {
        return cards;
    }
}