/*
 * Copyright 2006, XpertNet SARL, and individual contributors as indicated
 * by the contributors.txt.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 *
 * @author Ravaneswaran Chinnasamy
 */

package com.xpn.xwiki.plugin.lucene;

import org.apache.log4j.Logger;

import java.util.Calendar;
import java.text.SimpleDateFormat;
import java.text.ParseException;

public final class DateUtility {

    public static final String DATE_FORMAT_ONE = "dd-MM-yyyy";

    public static final String DATE_FORMAT_TWO = "yyyy-MM-dd";

    public static final String DATE_FORMAT_THREE = "yyyy-MM-dd HH:mm:ss.ms";

    private static final Logger LOG = Logger.getLogger(DateUtility.class);

    public static String getDateString(String date, String format) {
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        Calendar cal = Calendar.getInstance();
        try {
            sdf.parse(date);
        } catch (ParseException e) {
            // Ingonore this
        }
        return sdf.format(cal.getTime());
    }

    public static String getCurrentDate(String format) {
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        Calendar cal = Calendar.getInstance();
        return sdf.format(cal.getTime());
    }

    public static String getCurrentDate() {
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_ONE);
        Calendar cal = Calendar.getInstance();
        return sdf.format(cal.getTime());
    }

    public static String getPreviousDate() {
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_ONE);
        Calendar cal = Calendar.getInstance();
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE) - 1);
        return sdf.format(cal.getTime());
    }

    public static String getNextDate() {
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_ONE);
        Calendar cal = Calendar.getInstance();
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE) + 1);
        return sdf.format(cal.getTime());
    }

    public static String getPreviousDate(int noOfDays) {
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_ONE);
        Calendar cal = Calendar.getInstance();
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE) - noOfDays);
        return sdf.format(cal.getTime());
    }

    public static String getNextDate(int noOfDays) {
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_ONE);
        Calendar cal = Calendar.getInstance();
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE) + noOfDays);
        return sdf.format(cal.getTime());
    }
}