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 org.activityinfo.legacy.shared.command.CreateReport;
import org.activityinfo.legacy.shared.command.result.CommandResult;
import org.activityinfo.legacy.shared.command.result.CreateResult;
import org.activityinfo.legacy.shared.exception.CommandException;
import org.activityinfo.legacy.shared.exception.ParseException;
import org.activityinfo.server.database.hibernate.entity.ReportDefinition;
import org.activityinfo.server.database.hibernate.entity.User;
import org.activityinfo.server.database.hibernate.entity.UserDatabase;
import org.activityinfo.server.report.ReportParserJaxb;

import javax.persistence.EntityManager;
import javax.xml.bind.JAXBException;

public class CreateReportHandler implements CommandHandler<CreateReport> {
    private EntityManager em;

    private ReportDefinition reportDef;

    @Inject
    public CreateReportHandler(EntityManager em) {
        this.em = em;
    }

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

        // verify that the XML is valid
        try {
            reportDef = new ReportDefinition();

            // TODO should allow null to xml field
            String xml = ReportParserJaxb.createXML(cmd.getReport());
            reportDef.setXml(xml);

            if (cmd.getDatabaseId() != null) {
                reportDef.setDatabase(em.getReference(UserDatabase.class, cmd.getDatabaseId()));
            }

            reportDef.setTitle(cmd.getReport().getTitle());
            reportDef.setDescription(cmd.getReport().getDescription());
            reportDef.setOwner(user);
            reportDef.setVisibility(1);

            em.persist(reportDef);

            return new CreateResult(reportDef.getId());

        } catch (JAXBException e) {
            throw new ParseException(e.getMessage());
        }

    }
}