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/*
 * Copyright 2014 Objectos, Fábrica de Software LTDA.
 *
 * 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 br.com.objectos.way.schema.info;

import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.function.BinaryOperator;
import java.util.stream.Collector;
import java.util.stream.Collectors;

import br.com.objectos.way.pojo.Pojo;
import br.com.objectos.way.testable.Equality;
import br.com.objectos.way.testable.Testable;
import br.com.objectos.way.testable.Tester;

/**
 * @author [email protected] (Marcio Endo)
 */
@Pojo
public abstract class TableInfo implements Comparable, Testable {

  private static final Tester TESTER = Tester.of(TableInfo.class)
      .add("tableName", o -> o.tableName())
      .add("columnInfoList", o -> o.columnInfoList())
      .add("primaryKeyInfo", o -> o.primaryKeyInfo())
      .add("foreignKeyInfoList", o -> o.foreignKeyInfoList())
      .build();

  abstract TableName tableName();
  abstract List columnInfoList();
  abstract Optional primaryKeyInfo();
  abstract List foreignKeyInfoList();

  TableInfo() {
  }

  public static TableInfoBuilder builder() {
    return new TableInfoBuilderPojo();
  }

  public static  Collector>> distinct() {
    BinaryOperator max = BinaryOperator.maxBy(Comparator. naturalOrder());
    return Collectors.groupingBy(TableInfo::simpleName, Collectors.reducing(max));
  }

  @Override
  public int compareTo(TableInfo o) {
    return tableName().compareTo(o.tableName());
  }

  @Override
  public Equality isEqualTo(Object that) {
    return TESTER.test(this, that);
  }

  public String simpleName() {
    return tableName().simpleName();
  }

}