package ch.qos.logback.core.rolling;

import ch.qos.logback.core.joran.spi.NoAutoStart;
import ch.qos.logback.core.rolling.helper.DateTokenConverter;
import ch.qos.logback.core.rolling.helper.DefaultArchiveRemover;
import ch.qos.logback.core.rolling.helper.PeriodicRollingCalendar;
import java.io.File;
import java.util.Date;

/**
 * The default
 * {@link ch.qos.logback.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy}
 * is not capable of triggering rolling with intervals lie 10 mins or 5 hours or 2 days etc.
 * It can only trigger every 1 minute or 1 hour , 1 day.
 * The class TimeBasedFileNamingAndTriggeringPolicyBase extends
 * {@link ch.qos.logback.core.rolling.TimeBasedFileNamingAndTriggeringPolicyBase}
 * to provide this functionality using a  {@link ch.qos.logback.core.rolling.helper.PeriodRollingCalendar}
 *
 * @author rathmm
 * @param <E>
 */

@NoAutoStart
public class PeriodicTimeBasedFileNamingAndTriggeringPolicy<E> extends TimeBasedFileNamingAndTriggeringPolicyBase<E> {
    
    int period;

    public int getPeriod() {
        return period;
    }

    public void setPeriod(int period) {
        this.period = period;
    }


    @Override
    public void start() {

        /*Start of code copy from ch.qos.logback.core.rolling.TimeBasedFileNamingAndTriggeringPolicyBase **/
        /*Replaced RollingCalendar with PeriodicRollingCalendar*/

        DateTokenConverter dtc = tbrp.fileNamePattern.getDateTokenConverter();
        if (dtc == null) {
            throw new IllegalStateException("FileNamePattern ["
                    + tbrp.fileNamePattern.getPattern()
                    + "] does not contain a valid DateToken");
        }

        rc = new PeriodicRollingCalendar(period);
        rc.init(dtc.getDatePattern());
        addInfo("The date pattern is '" + dtc.getDatePattern()
                + "' from file name pattern '" + tbrp.fileNamePattern.getPattern()
                + "'.");
        rc.printPeriodicity(this);


        setDateInCurrentPeriod(new Date(getCurrentTime()));
        if (tbrp.getParentsRawFileProperty() != null) {
            File currentFile = new File(tbrp.getParentsRawFileProperty());
            if (currentFile.exists() && currentFile.canRead()) {
                setDateInCurrentPeriod(new Date(currentFile.lastModified()));
            }
        }

        addInfo("Setting initial period to " + dateInCurrentPeriod);
        computeNextCheck();

        /**End of code copy from ch.qos.logback.core.rolling.TimeBasedFileNamingAndTriggeringPolicyBase **/
        /**Start of code copy from ch.qos.logback.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy **/
        archiveRemover = new DefaultArchiveRemover(tbrp.fileNamePattern, rc);
        archiveRemover.setContext(context);
        started = true;
        /**End of code copy from ch.qos.logback.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy **/
    }

    @Override
    public boolean isTriggeringEvent(File activeFile, final E event) {
        long time = getCurrentTime();
        if (time >= nextCheck) {
            Date dateOfElapsedPeriod = dateInCurrentPeriod;
            elapsedPeriodsFileName = tbrp.fileNamePatternWCS.convert(dateOfElapsedPeriod);
            setDateInCurrentPeriod(time);
            computeNextCheck();
            return true;
        } else {
            return false;
        }
    }

    @Override
    public String toString() {
        return "c.q.l.core.rolling.PeriodicTimeBasedFileNamingAndTriggeringPolicy";
    }


}