/*
 * Autopsy Forensic Browser
 *
 * Copyright 2014 Basis Technology Corp.
 * Contact: carrier <at> sleuthkit <dot> org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sleuthkit.autopsy.timeline.zooming;

import java.time.temporal.ChronoUnit;
import org.joda.time.Days;
import org.joda.time.Hours;
import org.joda.time.Minutes;
import org.joda.time.Months;
import org.joda.time.Period;
import org.joda.time.Seconds;
import org.joda.time.Years;

/**
 * predefined units of time for use in choosing axis labels and sub intervals.
 */
public enum TimeUnits implements DisplayNameProvider {

    FOREVER(null, ChronoUnit.FOREVER),
    YEARS(Years.ONE.toPeriod(), ChronoUnit.YEARS),
    MONTHS(Months.ONE.toPeriod(), ChronoUnit.MONTHS),
    DAYS(Days.ONE.toPeriod(), ChronoUnit.DAYS),
    HOURS(Hours.ONE.toPeriod(), ChronoUnit.HOURS),
    MINUTES(Minutes.ONE.toPeriod(), ChronoUnit.MINUTES),
    SECONDS(Seconds.ONE.toPeriod(), ChronoUnit.SECONDS);

    public static TimeUnits fromChronoUnit(ChronoUnit chronoUnit) {
        switch (chronoUnit) {

            case FOREVER:
                return FOREVER;
            case ERAS:
            case MILLENNIA:
            case CENTURIES:
            case DECADES:
            case YEARS:
                return YEARS;
            case MONTHS:
                return MONTHS;
            case WEEKS:
            case DAYS:
                return DAYS;
            case HOURS:
            case HALF_DAYS:
                return HOURS;
            case MINUTES:
                return MINUTES;
            case SECONDS:
            case MILLIS:
            case MICROS:
            case NANOS:
                return SECONDS;
            default:
                return YEARS;
        }
    }

    private final Period p;

    private final ChronoUnit cu;

    public Period getPeriod() {
        return p;
    }

    public ChronoUnit getChronoUnit() {
        return cu;
    }

    private TimeUnits(Period p, ChronoUnit cu) {
        this.p = p;
        this.cu = cu;
    }

    @Override
    public String getDisplayName() {
        return toString();
    }
}