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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.system.procs;

import com.impossibl.postgres.api.data.Interval;
import com.impossibl.postgres.system.Context;
import com.impossibl.postgres.types.Type;

import java.io.IOException;
import java.text.ParseException;
import java.time.Duration;
import java.time.Period;
import java.time.temporal.ChronoUnit;

import io.netty.buffer.ByteBuf;

public class Intervals extends SimpleProcProvider {

  public Intervals() {
    super(new TxtEncoder(), new TxtDecoder(), new BinEncoder(), new BinDecoder(), "interval_");
  }

  static class BinDecoder extends AutoConvertingBinaryDecoder {

    BinDecoder() {
      super(16, Interval::toString);
    }

    @Override
    public Class getDefaultClass() {
      return Interval.class;
    }

    @Override
    protected Interval decodeNativeValue(Context context, Type type, Short typeLength, Integer typeModifier, ByteBuf buffer, Class targetClass, Object targetContext) throws IOException {

      long timeMicros = buffer.readLong();
      int days = buffer.readInt();
      int months = buffer.readInt();

      Period period = Period.of(0, months, days);
      Duration duration = Duration.of(timeMicros, ChronoUnit.MICROS);

      return Interval.of(period, duration);
    }

  }

  static class BinEncoder extends AutoConvertingBinaryEncoder {

    BinEncoder() {
      super(16, Interval::parse);
    }

    @Override
    public Class getDefaultClass() {
      return Interval.class;
    }

    @Override
    protected void encodeNativeValue(Context context, Type type, Interval value, Object sourceContext, ByteBuf buffer) throws IOException {
      Duration duration = value.getDuration();
      buffer.writeLong((duration.getSeconds() * 1_000_000L) + (duration.getNano() / 1_000));

      Period period = value.getPeriod();
      buffer.writeInt(period.getDays());
      buffer.writeInt((period.getYears() * 12) + period.getMonths());
    }

  }

  static class TxtDecoder extends AutoConvertingTextDecoder {

    TxtDecoder() {
      super(Interval::toString);
    }

    @Override
    public Class getDefaultClass() {
      return Interval.class;
    }

    @Override
    protected Interval decodeNativeValue(Context context, Type type, Short typeLength, Integer typeModifier, CharSequence buffer, Class targetClass, Object targetContext) throws IOException, ParseException {
      return context.getServerIntervalFormat().getParser().parse(buffer);
    }

  }

  static class TxtEncoder extends AutoConvertingTextEncoder {

    TxtEncoder() {
      super(Interval::parse);
    }

    @Override
    public Class getDefaultClass() {
      return Interval.class;
    }

    @Override
    protected void encodeNativeValue(Context context, Type type, Interval value, Object sourceContext, StringBuilder buffer) throws IOException {
      buffer.append(context.getServerIntervalFormat().getPrinter().format(value));
    }

  }

}