/*
 * Copyright (C) 2020 The Android Open Source Project
 *
 * 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 com.android.icu.util;

import android.icu.util.Calendar;
import android.icu.util.ULocale;

import libcore.api.IntraCoreApi;

import java.util.Objects;

/**
 * Provide extra functionalities on top of {@link Calendar} public APIs.
 *
 * @hide
 */
@IntraCoreApi
public class ExtendedCalendar {

    private final Calendar calendar;
    private final ULocale uLocale;

    private ExtendedCalendar(ULocale uLocale) {
        this.uLocale = uLocale;
        this.calendar = Calendar.getInstance(uLocale);
    }

    /**
     * Get an instance
     *
     * @param uLocale non-null ULocale
     * @hide
     */
    @IntraCoreApi
    public static ExtendedCalendar getInstance(ULocale uLocale) {
        Objects.requireNonNull(uLocale);
        return new ExtendedCalendar(uLocale);
    }

    /**
     * Returns the {@link android.icu.text.DateFormat} pattern for the given date and time styles.
     * Similiar to {@link Calendar#getDateTimeFormat(int, int, ULocale)} but returns the pattern
     * string instead of an instance of {@link android.icu.text.DateFormat}.
     *
     * @see {@link Calendar#getDateTimeFormat(int, int, ULocale)} for the style parameters.
     *
     * @hide
     */
    @IntraCoreApi
    public String getDateTimePattern(int dateStyle, int timeStyle) {
        return Calendar.getDateTimeFormatString(uLocale, calendar.getType(), dateStyle, timeStyle);
    }
}
