/*
 * Copyright DataStax, Inc.
 *
 * 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 com.datastax.oss.driver.internal.core.type.codec.extras.time;

import com.datastax.oss.driver.api.core.type.codec.MappingCodec;
import com.datastax.oss.driver.api.core.type.codec.TypeCodec;
import com.datastax.oss.driver.api.core.type.reflect.GenericType;
import com.datastax.oss.driver.internal.core.type.codec.TimestampCodec;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Objects;
import net.jcip.annotations.Immutable;

TypeCodec that maps LocalDateTime to CQL timestamp, allowing the setting and retrieval of timestamp columns as LocalDateTime instances. 
This codec shares its logic with TimestampCodec. See the javadocs of this codec for important remarks about implementation notes and accepted timestamp formats. /**
 * {@link TypeCodec} that maps {@link LocalDateTime} to CQL {@code timestamp}, allowing the setting
 * and retrieval of {@code timestamp} columns as {@link LocalDateTime} instances.
 *
 * <p>This codec shares its logic with {@link TimestampCodec}. See the javadocs of this codec for
 * important remarks about implementation notes and accepted timestamp formats.
 */
@Immutable
public class LocalTimestampCodec extends MappingCodec<Instant, LocalDateTime> {

  private final ZoneId timeZone;

  
Creates a new LocalTimestampCodec that converts CQL timestamps into LocalDateTime instances using the system's default time
zone as their time zone. The supplied timeZone will also be used to parse CQL timestamp literals that do not include any time zone information. /**
   * Creates a new {@code LocalTimestampCodec} that converts CQL timestamps into {@link
   * LocalDateTime} instances using the system's {@linkplain ZoneId#systemDefault() default time
   * zone} as their time zone. The supplied {@code timeZone} will also be used to parse CQL
   * timestamp literals that do not include any time zone information.
   */
  public LocalTimestampCodec() {
    this(ZoneId.systemDefault());
  }

  
Creates a new LocalTimestampCodec that converts CQL timestamps into LocalDateTime instances using the given ZoneId as their time zone. The supplied 
timeZone will also be used to parse CQL timestamp literals that do not include any time zone information. /**
   * Creates a new {@code LocalTimestampCodec} that converts CQL timestamps into {@link
   * LocalDateTime} instances using the given {@link ZoneId} as their time zone. The supplied {@code
   * timeZone} will also be used to parse CQL timestamp literals that do not include any time zone
   * information.
   */
  public LocalTimestampCodec(@NonNull ZoneId timeZone) {
    super(
        new TimestampCodec(Objects.requireNonNull(timeZone, "timeZone cannot be null")),
        GenericType.LOCAL_DATE_TIME);
    this.timeZone = timeZone;
  }

  @Override
  public boolean accepts(@NonNull Object value) {
    Objects.requireNonNull(value);
    return value instanceof LocalDateTime;
  }

  @Nullable
  @Override
  protected LocalDateTime innerToOuter(@Nullable Instant value) {
    return value == null ? null : LocalDateTime.ofInstant(value, timeZone);
  }

  @Nullable
  @Override
  protected Instant outerToInner(@Nullable LocalDateTime value) {
    return value == null ? null : value.atZone(timeZone).toInstant();
  }
}