package org.activityinfo.server.command.handler;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import com.google.inject.Inject;
import com.google.inject.Injector;
import org.activityinfo.legacy.shared.command.UpdateTargetValue;
import org.activityinfo.legacy.shared.command.result.CommandResult;
import org.activityinfo.legacy.shared.command.result.VoidResult;
import org.activityinfo.legacy.shared.exception.CommandException;
import org.activityinfo.server.command.handler.crud.PropertyMap;
import org.activityinfo.server.database.hibernate.entity.*;

import javax.persistence.EntityManager;
import java.util.Map;
import java.util.logging.Logger;

public class UpdateTargetValueHandler extends BaseEntityHandler implements CommandHandler<UpdateTargetValue> {

    private final static Logger LOG = Logger.getLogger(UpdateTargetValueHandler.class.getName());

    private final Injector injector;

    @Inject
    public UpdateTargetValueHandler(EntityManager em, Injector injector) {
        super(em);
        this.injector = injector;
    }

    @Override
    public CommandResult execute(UpdateTargetValue cmd, User user) throws CommandException {

        LOG.fine("[execute] Update command for entity: TargetValue");

        Map<String, Object> changes = cmd.getChanges().getTransientMap();
        new PropertyMap(changes);

        try {
            TargetValue targetValue = entityManager().find(TargetValue.class,
                    new TargetValueId(cmd.getTargetId(), cmd.getIndicatorId()));
            if (cmd.getChanges().get("value") != null) {
                targetValue.setValue((Double.valueOf((String) cmd.getChanges().get("value"))));
                entityManager().persist(targetValue);

                return new VoidResult();
            }

            entityManager().remove(targetValue);
            return new VoidResult();
        } catch (Exception e) {
            // ignore
        }

        Target target = entityManager().find(Target.class, cmd.getTargetId());
        Indicator indicator = entityManager().find(Indicator.class, cmd.getIndicatorId());

        TargetValue targetValue = new TargetValue();
        targetValue.setId(new TargetValueId(cmd.getTargetId(), cmd.getIndicatorId()));
        targetValue.setValue((Double.valueOf((String) cmd.getChanges().get("value"))));
        targetValue.setTarget(target);
        targetValue.setIndicator(indicator);

        entityManager().persist(targetValue);

        return new VoidResult();
    }
}