/*
 * 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.jdbi.v3.postgres;

import java.math.BigDecimal;
import java.sql.Types;
import java.time.Duration;

import org.jdbi.v3.core.argument.AbstractArgumentFactory;
import org.jdbi.v3.core.argument.Argument;
import org.jdbi.v3.core.argument.ObjectArgument;
import org.jdbi.v3.core.config.ConfigRegistry;
import org.postgresql.util.PGInterval;

Postgres version of argument factory for Duration. 
 For simplicity, this implementation makes the duration positive before proceeding. However, this can cause an ArithmeticException to be thrown. E.g., this can occur if your duration is -2^63 seconds. 
 Not all Durations can be represented as intervals in Postgres. One incompatibility results from Durations that are too large. This is due to (1) Durations using a long internally, and PGIntervals using ints; and (2) the conversion of days to months or years being ambiguous. Another results from Durations being too precise; they have nanosecond precision, whereas Postgres has only microsecond. An IllegalArgumentException will be thrown in these cases. The handling of the second is subject to revision in the future; for example, it would be reasonable to have a configurable truncation option. /**
 * Postgres version of argument factory for {@link Duration}.
 *
 * <p>
 * For simplicity, this implementation makes the duration positive before proceeding. However, this can cause an
 * {@link ArithmeticException} to be thrown. E.g., this can occur if your duration is -2^63 seconds.
 *
 * <p>
 * Not all {@link Duration}s can be represented as intervals in Postgres.
 * One incompatibility results from {@link Duration}s that are too large. This is due to (1) {@link Duration}s using
 * a {@code long} internally, and {@link PGInterval}s using {@code int}s; and (2) the conversion of days to months or
 * years being ambiguous.
 * Another results from {@link Duration}s being too precise; they have nanosecond precision, whereas Postgres has only
 * microsecond.
 * An {@link IllegalArgumentException} will be thrown in these cases.
 * The handling of the second is subject to revision in the future; for example, it would be reasonable to have a
 * configurable truncation option.
 */
public class DurationArgumentFactory extends AbstractArgumentFactory<Duration> {

    public DurationArgumentFactory() {
        super(Types.OTHER);
    }

    @Override
    public Argument build(Duration duration, ConfigRegistry config) {
        Duration d = duration;
        final boolean isNegative = d.isNegative();
        if (isNegative) {
            d = d.negated();
        }
        final long days = d.toDays();
        if (days > Integer.MAX_VALUE) {
            throw new IllegalArgumentException(
                    String.format("duration %s too large to be represented unambiguously as postgres interval",
                            d));
        }
        d = d.minusDays(days);
        final int hours = (int) d.toHours();
        d = d.minusHours(hours);
        final int minutes = (int) d.toMinutes();
        d = d.minusMinutes(minutes);
        if (d.getNano() % 1000 != 0) {
            throw new IllegalArgumentException(
                    String.format("duration %s too precise to represented as postgres interval", d));
        }
        double seconds = BigDecimal.valueOf(d.getSeconds())
                .add(BigDecimal.valueOf(d.getNano()).movePointLeft(9))
                .doubleValue();
        final PGInterval interval = new PGInterval(0, 0, (int) days, hours, minutes, seconds);
        if (isNegative) {
            interval.scale(-1);
        }
        return ObjectArgument.of(interval, Types.OTHER);
    }
}