/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You 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.apache.poi.hslf.util;


import static org.junit.jupiter.api.Assertions.assertEquals;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import org.apache.poi.util.LocaleUtil;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

/**
 * Tests that SystemTimeUtils works properly.
 */
public final class TestSystemTimeUtils {
    // From real files
    private final byte[] data_a = new byte[] {
        0xD6-256, 07, 01, 00,
        02, 00, 0x18, 00, 0x0A, 00, 0x1A, 00,
        0x0F, 00, 0xCD-256, 00
    };
    private final byte[] data_b = new byte[] {
        00, 00, 0xE1-256, 0x2E, 0x1C, 00, 00, 00,
        01, 00, 00, 00, 0xD6-256, 0x07, 01, 00,
        02, 00, 0x18, 00, 0x15, 00, 0x19, 00, 03,
        00, 0xD5-256, 02, 0x0A, 00, 00, 00,
        0x0A, 00, 00, 00
    };

    private static SimpleDateFormat sdf;

    @BeforeAll
    public static void initDateFormat() {
        sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS", Locale.ROOT);
        sdf.setTimeZone(LocaleUtil.getUserTimeZone());
    }

    @Test
    void testGetDateA() throws Exception {
        Date date = SystemTimeUtils.getDate(data_a);

        // Is 2006-01-24 (2nd day of week) 10:26:15.205
        Date exp = sdf.parse("2006-01-24 10:26:15.205");
        assertEquals(exp.getTime(), date.getTime());
        assertEquals(exp, date);
    }

    @Test
    void testGetDateB() throws Exception {
        Date date = SystemTimeUtils.getDate(data_b, 8+4);

        // Is 2006-01-24 (2nd day of week) 21:25:03.725
        Date exp = sdf.parse("2006-01-24 21:25:03.725");
        assertEquals(exp.getTime(), date.getTime());
        assertEquals(exp, date);
    }

    @Test
    void testWriteDateA() throws Exception {
        byte[] out_a = new byte[data_a.length];
        Date date = sdf.parse("2006-01-24 10:26:15.205");
        SystemTimeUtils.storeDate(date, out_a);

        for(int i=0; i<out_a.length; i++) {
            assertEquals(data_a[i], out_a[i]);
        }
    }

    @Test
    void testWriteDateB() throws Exception {
        byte[] out_b = new byte[data_b.length];
        // Copy over start and end, ignoring the 16 byte date field in the middle
        System.arraycopy(data_b, 0, out_b, 0, 12);
        System.arraycopy(data_b, 12+16, out_b, 12+16, data_b.length-12-16);

        Date date = sdf.parse("2006-01-24 21:25:03.725");
        SystemTimeUtils.storeDate(date, out_b, 12);

        for(int i=0; i<out_b.length; i++) {
            assertEquals(data_b[i], out_b[i]);
        }
    }
}