Implement Thick-Skinned Goblin

Mage/src/main/java/mage/abilities/effects/keyword/EchoEffect.java

@@ -0,0 +1,94 @@
+package mage.abilities.effects.keyword;
+
+import mage.abilities.Ability;
+import mage.abilities.Mode;
+import mage.abilities.costs.Cost;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.effects.OneShotEffect;
+import mage.constants.AsThoughEffectType;
+import mage.constants.Outcome;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+
+import java.util.Locale;
+
+public class EchoEffect extends OneShotEffect {
+
+    protected Cost cost;
+    protected DynamicValue amount;
+
+    public EchoEffect(Cost costs) {
+        super(Outcome.Sacrifice);
+        this.cost = costs;
+        this.amount = null;
+    }
+
+    public EchoEffect(DynamicValue amount) {
+        super(Outcome.Sacrifice);
+        this.amount = amount;
+        this.cost = null;
+    }
+
+    public EchoEffect(final EchoEffect effect) {
+        super(effect);
+        this.cost = effect.cost;
+        this.amount = effect.amount;
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        if (cost == null) {
+            cost = new ManaCostsImpl(Integer.toString(amount.calculate(game, source, this)));
+        }
+        Player controller = game.getPlayer(source.getControllerId());
+        if (controller != null
+                && source.getSourceObjectIfItStillExists(game) != null) {
+            if (game.getContinuousEffects().asThough(source.getSourceId(), AsThoughEffectType.PAY_0_ECHO, source, source.getControllerId(), game) != null) {
+                Cost altCost = new ManaCostsImpl("{0}");
+                if (controller.chooseUse(Outcome.Benefit, "Pay {0} instead of the echo cost?", source, game)) {
+                    altCost.clearPaid();
+                    if (altCost.pay(source, game, source.getSourceId(), source.getControllerId(), false, null)) {
+                        game.fireEvent(GameEvent.getEvent(GameEvent.EventType.ECHO_PAID, source.getSourceId(), source.getSourceId(), source.getControllerId()));
+                        return true;
+                    }
+                }
+            }
+            if (controller.chooseUse(Outcome.Benefit, "Pay " + cost.getText() + '?', source, game)) {
+                cost.clearPaid();
+                if (cost.pay(source, game, source.getSourceId(), source.getControllerId(), false, null)) {
+                    game.fireEvent(GameEvent.getEvent(GameEvent.EventType.ECHO_PAID, source.getSourceId(), source.getSourceId(), source.getControllerId()));
+                    return true;
+                }
+            }
+            Permanent permanent = game.getPermanent(source.getSourceId());
+            if (permanent != null) {
+                permanent.sacrifice(source.getSourceId(), game);
+            }
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public EchoEffect copy() {
+        return new EchoEffect(this);
+    }
+
+    @Override
+    public String getText(Mode mode) {
+        StringBuilder sb = new StringBuilder("sacrifice {this} unless you ");
+        String costText = cost.getText();
+        if (costText.toLowerCase(Locale.ENGLISH).startsWith("discard")) {
+            sb.append(costText.substring(0, 1).toLowerCase(Locale.ENGLISH));
+            sb.append(costText.substring(1));
+        } else {
+            sb.append("pay ").append(costText);
+        }
+
+        return sb.toString();
+
+    }
+}