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/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package org.mule.modules.schedulers.cron;

import static java.lang.String.format;
import static java.util.TimeZone.getDefault;
import static java.util.TimeZone.getTimeZone;

import org.mule.api.schedule.Scheduler;
import org.mule.api.schedule.SchedulerFactory;
import org.mule.transport.PollingReceiverWorker;

import java.util.TimeZone;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;


/**
 * 
 * Factory of the Cron Scheduler for poll
 * 
 *
 * @since 3.5.0
 */
public class CronSchedulerFactory extends SchedulerFactory
{
    private static final Log logger = LogFactory.getLog(CronSchedulerFactory.class);

    private static final String TZ_GMT_ID = "GMT";

    private String expression;

    private String timeZone;

    @Override
    protected Scheduler doCreate(String name, PollingReceiverWorker job)
    {
        CronScheduler cronScheduler = new CronScheduler(name, job, expression, resolveTimeZone(name));
        cronScheduler.setMuleContext(context);
        return cronScheduler;
    }

    protected TimeZone resolveTimeZone(String name)
    {
        TimeZone resolvedTimeZone = timeZone == null ? getDefault() : getTimeZone(timeZone);
        if (!TZ_GMT_ID.equals(timeZone) && resolvedTimeZone.equals(getTimeZone(TZ_GMT_ID)))
        {
            logger.warn(format("Configured timezone '%s' is invalid in scheduler '%s'. Defaulting to %s", timeZone, name, TZ_GMT_ID));
        }
        return resolvedTimeZone;
    }

    public void setExpression(String expression)
    {
        this.expression = expression;
    }

    public void setTimeZone(String timeZone)
    {
        this.timeZone = timeZone;
    }
}