/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.values.utils;

import static java.time.temporal.ChronoUnit.SECONDS;
import static org.junit.jupiter.api.Assertions.assertEquals;

import java.time.Duration;
import java.time.LocalTime;
import java.time.OffsetTime;
import java.time.ZoneOffset;
import org.junit.jupiter.api.Test;

class TemporalUtilTest {
    @Test
    void shouldDoNothingForOffsetWithoutSeconds() {
        OffsetTime time = OffsetTime.of(23, 30, 10, 0, ZoneOffset.ofHoursMinutes(-5, -30));

        OffsetTime truncatedTime = TemporalUtil.truncateOffsetToMinutes(time);

        assertEquals(time, truncatedTime);
    }

    @Test
    void shouldTruncateOffsetSeconds() {
        OffsetTime time = OffsetTime.of(14, 55, 50, 0, ZoneOffset.ofHoursMinutesSeconds(2, 15, 45));

        OffsetTime truncatedTime = TemporalUtil.truncateOffsetToMinutes(time);

        assertEquals(OffsetTime.of(14, 55, 5, 0, ZoneOffset.ofHoursMinutes(2, 15)), truncatedTime);
    }

    @Test
    void shouldConvertNanosOfDayToUTCWhenOffsetIsZero() {
        int nanosOfDayLocal = 42;

        long nanosOfDayUTC = TemporalUtil.nanosOfDayToUTC(nanosOfDayLocal, 0);

        assertEquals(nanosOfDayLocal, nanosOfDayUTC);
    }

    @Test
    void shouldConvertNanosOfDayToUTC() {
        int nanosOfDayLocal = 42;
        Duration offsetDuration = Duration.ofMinutes(35);

        long nanosOfDayUTC = TemporalUtil.nanosOfDayToUTC(nanosOfDayLocal, (int) offsetDuration.getSeconds());

        assertEquals(nanosOfDayLocal - offsetDuration.toNanos(), nanosOfDayUTC);
    }

    @Test
    void shouldGetNanosOfDayUTC() {
        LocalTime localTime = LocalTime.of(14, 19, 18, 123999);
        ZoneOffset offset = ZoneOffset.ofHours(-12);
        OffsetTime time = OffsetTime.of(localTime, offset);

        long nanosOfDayUTC = TemporalUtil.getNanosOfDayUTC(time);

        long expectedNanosOfDayUTC = Duration.ofSeconds(localTime.toSecondOfDay())
                .minus(offset.getTotalSeconds(), SECONDS)
                .toNanos();

        assertEquals(expectedNanosOfDayUTC + localTime.getNano(), nanosOfDayUTC);
    }
}
