/*
 * This file is part of LibrePlan
 *
 * Copyright (C) 2013 St. Antoniusziekenhuis
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.libreplan.business.common.entities;

import org.apache.commons.lang3.StringUtils;
import javax.validation.constraints.AssertTrue;
import javax.validation.constraints.NotNull;
import org.libreplan.business.common.BaseEntity;
import org.libreplan.business.common.IHumanIdentifiable;
import org.libreplan.business.common.Registry;
import org.libreplan.business.common.daos.IJobSchedulerConfigurationDAO;

/**
 * JobSchedulerConfiguration entity, represents parameters for the jobs to be scheduled.
 * This entity is used by the <code>SchedulerManager</code> to
 * schedule jobs and in UI to show the scheduler status.
 *
 * The <code>jobGroup</code> and <code>jobName</code> together forms a job key
 * and non of the fields must be null. Moreover it should contain a valid <code>cronExpression</code>.
 *
 * @author Miciele Ghiorghis <m.ghiorghis@antoniusziekenhuis.nl>
 */
public class JobSchedulerConfiguration extends BaseEntity implements IHumanIdentifiable {

    private String jobGroup;

    private String jobName;

    private String cronExpression;

    private JobClassNameEnum jobClassName;

    private boolean schedule;

    private String connectorName;

    /**
     * Constructor for Hibernate. Do not use!
     */
    protected JobSchedulerConfiguration() {}

    public static JobSchedulerConfiguration create() {
        return create(new JobSchedulerConfiguration());
    }

    @NotNull(message = "job group not specified")
    public String getJobGroup() {
        return jobGroup;
    }

    public void setJobGroup(String jobGroup) {
        this.jobGroup = jobGroup;
    }

    @NotNull(message = "job name not specified")
    public String getJobName() {
        return jobName;
    }

    public void setJobName(String jobName) {
        this.jobName = jobName;
    }

    @NotNull(message = "cron expression not specified")
    public String getCronExpression() {
        return cronExpression;
    }

    public void setCronExpression(String cronExpression) {
        this.cronExpression = cronExpression;
    }

    @NotNull(message = "job class name not specified")
    public JobClassNameEnum getJobClassName() {
        return jobClassName;
    }

    public void setJobClassName(JobClassNameEnum jobClassName) {
        this.jobClassName = jobClassName;
    }

    public boolean isSchedule() {
        return schedule;
    }

    public void setSchedule(boolean schedule) {
        this.schedule = schedule;
    }

    public String getConnectorName() {
        return connectorName;
    }

    public void setConnectorName(String connectorName) {
        this.connectorName = connectorName;
    }

    @Override
    public String getHumanId() {
        return jobGroup == null ? "" : jobGroup;
    }

    @AssertTrue(message = "job group and name are already being used")
    public boolean isUniqueJobGroupAndNameConstraint() {
        if ( StringUtils.isBlank(jobGroup) && StringUtils.isBlank(jobName) ) {
            return true;
        }

        IJobSchedulerConfigurationDAO jobSchedulerConfigurationDAO = Registry.getJobSchedulerConfigurationDAO();

        if ( isNewObject() ) {
            return !jobSchedulerConfigurationDAO.existsByJobGroupAndJobNameAnotherTransaction(this);
        } else {
            JobSchedulerConfiguration found =
                    jobSchedulerConfigurationDAO.findUniqueByJobGroupAndJobNameAnotherTransaction(jobGroup, jobName);

            return found == null || found.getId().equals(getId());
        }
    }
}