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package mage.abilities.effects.common.combat;

import java.util.UUID;
import mage.abilities.Ability;
import mage.abilities.effects.RequirementEffect;
import mage.constants.AbilityType;
import mage.constants.Duration;
import mage.game.Game;
import mage.game.permanent.Permanent;
import mage.watchers.common.BlockedAttackerWatcher;

/**
 *
 * @author LevelX2
 */
public class MustBeBlockedByAllTargetEffect extends RequirementEffect {

    public MustBeBlockedByAllTargetEffect(Duration duration) {
        super(duration);
        staticText =  new StringBuilder("All creatures able to block target creature ")
                .append(this.getDuration() == Duration.EndOfTurn ? "this turn ":"")
                .append("do so").toString();
    }

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

    @Override
    public boolean applies(Permanent permanent, Ability source, Game game) {        
        Permanent attackingCreature = game.getPermanent(this.getTargetPointer().getFirst(game, source));
        if (attackingCreature != null && attackingCreature.isAttacking()) {
            if (source.getAbilityType() != AbilityType.STATIC) {
                BlockedAttackerWatcher blockedAttackerWatcher = (BlockedAttackerWatcher) game.getState().getWatchers().get(BlockedAttackerWatcher.class.getSimpleName());
                if (blockedAttackerWatcher != null && blockedAttackerWatcher.creatureHasBlockedAttacker(attackingCreature, permanent, game)) {
                    // has already blocked this turn, so no need to do again
                    return false;
                }
            }
            return permanent.canBlock(this.getTargetPointer().getFirst(game, source), game);
        }
        return false;
    }

    @Override
    public boolean mustAttack(Game game) {
        return false;
    }

    @Override
    public boolean mustBlock(Game game) {
        return true;
    }

    @Override
    public UUID mustBlockAttacker(Ability source, Game game) {
        return this.getTargetPointer().getFirst(game, source);
    }

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

}