/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.phoenix.schema;

import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.HConstants;
import org.apache.phoenix.coprocessor.generated.PTableProtos;
import org.apache.phoenix.jdbc.PhoenixConnection;
import org.apache.phoenix.jdbc.PhoenixDatabaseMetaData;
import org.apache.phoenix.parse.CreateTableStatement;

import org.apache.phoenix.thirdparty.com.google.common.base.Preconditions;

public class LiteralTTLExpression implements TTLExpression, CompiledTTLExpression {
  private final int ttlValue;

  public static final LiteralTTLExpression TTL_EXPRESSION_FOREVER =
    new LiteralTTLExpression(HConstants.FOREVER);
  public static final LiteralTTLExpression TTL_EXPRESSION_NOT_DEFINED =
    new LiteralTTLExpression(PhoenixDatabaseMetaData.TTL_NOT_DEFINED);
  public static final LiteralTTLExpression TTL_EXPRESSION_DEFINED_IN_TABLE_DESCRIPTOR =
    new LiteralTTLExpression(PhoenixDatabaseMetaData.TTL_DEFINED_IN_TABLE_DESCRIPTOR);

  public LiteralTTLExpression(int ttl) {
    Preconditions.checkArgument(ttl == -1 || ttl >= 0);
    this.ttlValue = ttl;
  }

  public LiteralTTLExpression(LiteralTTLExpression ttlExpr) {
    this.ttlValue = ttlExpr.ttlValue;
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    LiteralTTLExpression that = (LiteralTTLExpression) o;
    return ttlValue == that.ttlValue;
  }

  @Override
  public int hashCode() {
    return Objects.hash(ttlValue);
  }

  @Override
  public String getTTLExpression() {
    return String.valueOf(ttlValue);
  }

  @Override
  public String toString() {
    return getTTLExpression();
  }

  @Override
  public long getRowTTLForMasking(List<Cell> result, boolean isRaw) {
    return getRowTTLForCompaction(result);
  }

  @Override
  public long getRowTTLForCompaction(List<Cell> result) {
    return ttlValue;
  }

  @Override
  public void validateTTLOnCreate(PhoenixConnection conn, CreateTableStatement create,
    PTable parent, Map<String, Object> tableProps) {

  }

  @Override
  public void validateTTLOnAlter(PhoenixConnection connection, PTable table, boolean isStrictTTL) {
  }

  @Override
  public CompiledTTLExpression compileTTLExpression(PhoenixConnection connection, PTable table) {
    return this;
  }

  public static LiteralTTLExpression createFromProto(PTableProtos.LiteralTTL literal) {
    return new LiteralTTLExpression(literal.getTtlValue());
  }

  @Override
  public PTableProtos.TTLExpression toProto() throws SQLException {
    if (this.equals(TTL_EXPRESSION_NOT_DEFINED)) {
      return null;
    }
    PTableProtos.TTLExpression.Builder ttl = PTableProtos.TTLExpression.newBuilder();
    PTableProtos.LiteralTTL.Builder literal = PTableProtos.LiteralTTL.newBuilder();
    literal.setTtlValue(ttlValue);
    ttl.setLiteral(literal.build());
    return ttl.build();
  }

  public int getTTLValue() {
    return ttlValue;
  }
}
