/*
 * Copyright (c) 2017-2020. Developed by Hedgecode.
 *
 * 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.hedgecode.snooker;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

/**
 * Date and Time Utils for Matches and Events.
 *
 * @author Dmitry Samoshin aka gotty
 */
public final class SnookerDateUtils {

    private static SnookerDateUtils _instance;

    private static final String DATE_PATTERN = SnookerScoreProperties.get("snooker.date.format");
    private static final String TIME_PATTERN = SnookerScoreProperties.get("snooker.time.format");
    private static final String DATETIME_PATTERN = String.format("%s %s", TIME_PATTERN , DATE_PATTERN);

    private static final TimeZone SNOOKER_TIMEZONE = TimeZone.getTimeZone(
            SnookerScoreProperties.get("snooker.timezone")
    );
    private static final TimeZone LOCAL_TIMEZONE = TimeZone.getDefault();

    private final DateFormat dateFormat;
    private final DateFormat snookerTimeFormat;
    private final DateFormat snookerDateTimeFormat;
    private final DateFormat localTimeFormat;
    private final DateFormat localDateTimeFormat;

    private SnookerDateUtils() {
        dateFormat = new SimpleDateFormat(DATE_PATTERN);

        snookerTimeFormat = new SimpleDateFormat(TIME_PATTERN);
        snookerTimeFormat.setTimeZone(SNOOKER_TIMEZONE);

        snookerDateTimeFormat = new SimpleDateFormat(DATETIME_PATTERN);
        snookerDateTimeFormat.setTimeZone(SNOOKER_TIMEZONE);

        localTimeFormat = new SimpleDateFormat(TIME_PATTERN);
        localTimeFormat.setTimeZone(LOCAL_TIMEZONE);

        localDateTimeFormat = new SimpleDateFormat(DATETIME_PATTERN);
        localDateTimeFormat.setTimeZone(LOCAL_TIMEZONE);
    }

    public static String formatDate(Date date) {
        return getInstance().format(date);
    }

    public static String formatTime(Date date) {
        return formatTime(date, false);
    }

    public static String formatTime(Date date, boolean withDate) {
        return getInstance().format(date, false, withDate);
    }

    public static String formatLocalTime(Date date) {
        return formatLocalTime(date, false);
    }

    public static String formatLocalTime(Date date, boolean withDate) {
        return getInstance().format(date, true, withDate);
    }

    private String format(Date date) {
        return dateFormat.format(date);
    }

    private String format(Date date, boolean isLocal, boolean withDate) {
        return getDateFormat(isLocal, withDate).format(date);
    }

    private DateFormat getDateFormat(boolean isLocal, boolean withDate) {
        if (isLocal) {
            return withDate ? localDateTimeFormat : localTimeFormat;
        }
        return withDate ? snookerDateTimeFormat : snookerTimeFormat;
    }

    protected static SnookerDateUtils getInstance() {
        if (_instance == null)
            _instance = new SnookerDateUtils();
        return _instance;
    }

}