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/*-
 *  * Copyright 2016 Skymind, Inc.
 *  *
 *  *    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.datavec.api.util;

import java.util.concurrent.TimeUnit;

/**
 * Created by Alex on 2/06/2016.
 */
public class TransformUtils {

    public static String timeUnitToString(long time, TimeUnit unit) {
        String str = String.valueOf(time);
        switch (unit) {
            case MILLISECONDS:
                str += "Millisecond";
                break;
            case SECONDS:
                str += "Second";
                break;
            case MINUTES:
                str += "Minute";
                break;
            case HOURS:
                str += "Hour";
                break;
            case DAYS:
                str += "Day";
                break;
            default:
                throw new RuntimeException();
        }
        if (time == 1)
            return str;
        return str + "s";
    }

    public static TimeUnit stringToTimeUnit(String str) {
        switch (str.toLowerCase()) {
            case "ms":
            case "millisecond":
            case "milliseconds":
                return TimeUnit.MILLISECONDS;
            case "s":
            case "sec":
            case "second":
            case "seconds":
                return TimeUnit.SECONDS;
            case "min":
            case "minute":
            case "minutes":
                return TimeUnit.MINUTES;
            case "h":
            case "hour":
            case "hours":
                return TimeUnit.HOURS;
            case "day":
            case "days":
                return TimeUnit.DAYS;
            default:
                throw new RuntimeException("Unknown time unit: \"" + str + "\"");
        }
    }

}