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/**
 * Copyright (c) 2013, impossibl.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of impossibl.com nor the names of its contributors may
 *    be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package com.impossibl.postgres.datetime.instants;

import com.impossibl.postgres.datetime.TimeZones;

import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.TimeZone;
import static java.util.concurrent.TimeUnit.MICROSECONDS;
import static java.util.concurrent.TimeUnit.MILLISECONDS;

public abstract class InfiniteInstant implements Instant {

  @Override
  public Type getType() {
    return Type.Infinity;
  }

  @Override
  public Date toDate() {
    return new Date(getMillisLocal());
  }

  @Override
  public Time toTime() {
    throw new IllegalStateException("Infinity cannot be represented as a 'time' value");
  }

  @Override
  public Timestamp toTimestamp() {

    long micros = getMicrosLocal();
    long millis = MICROSECONDS.toMillis(micros);
    long leftoverMicros = micros - MILLISECONDS.toMicros(millis);

    Timestamp ts = new Timestamp(millis);

    long nanos = ts.getNanos() + MICROSECONDS.toNanos(leftoverMicros);
    ts.setNanos((int) nanos);

    return ts;
  }

  @Override
  public TimeZone getZone() {
    return TimeZones.UTC;
  }

  @Override
  public long getZoneOffsetSecs() {
    return 0;
  }

  @Override
  public long getZoneOffsetMicros() {
    return 0;
  }

  @Override
  public long getZoneOffsetMillis() {
    return 0;
  }

  @Override
  public Instant switchTo(TimeZone zone) {
    return this;
  }

  @Override
  public Instant disambiguate(TimeZone zone) {
    return this;
  }

  @Override
  public Instant ambiguate() {
    return this;
  }

  @Override
  public Instant add(int field, int value) {
    return this;
  }

  @Override
  public Instant subtract(int field, int value) {
    return this;
  }

}