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/*
 * Copyright 2015 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.sql;

import static com.google.common.collect.Lists.newArrayList;

import java.util.List;

import br.com.objectos.way.core.auto.AutoFunctional;
import br.com.objectos.way.core.util.WayIterables;
import br.com.objectos.way.sql.ForeignKeyDef.ForeignKeyDefOnDelete;
import br.com.objectos.way.sql.ForeignKeyDef.ForeignKeyDefOnUpdate;
import br.com.objectos.way.sql.ForeignKeyDef.ForeignKeyDefReferences;

import com.google.common.base.Optional;

/**
 * @author [email protected] (Marcio Endo)
 */
abstract class ForeignKeyDefPojo
    implements
    ForeignKeyDef,
    ForeignKeyDefOnDelete,
    ForeignKeyDefOnUpdate,
    ForeignKeyDefReferences {

  private final TableDefPojo tableDef;
  private final String name;

  private final List foreignKeyPartDefList;

  private ForeignKeyAction deleteAction;
  private ForeignKeyAction updateAction;

  public ForeignKeyDefPojo(TableDefPojo tableDef, String name) {
    this.tableDef = tableDef;
    this.name = name;
    foreignKeyPartDefList = newArrayList();
  }

  public static  ForeignKeyDefLevel1 level1(TableDefPojo tableDef, String name, ColumnRef columnRef) {
    return new ForeignKeyDefLevel1(tableDef, name, columnRef);
  }

  @AutoFunctional
  @Override
  public ForeignKeyInfo toForeignKeyInfo() {
    return ForeignKeyInfo.builder()
        .name(Optional.fromNullable(name))
        .foreignKeyPartList(foreignKeyPartList())
        .deleteAction(Optional.fromNullable(deleteAction))
        .updateAction(Optional.fromNullable(updateAction))
        .build();
  }


  @Override
  public TableInfo toTableInfo() {
    return tableDef.toTableInfo();
  }

  @Override
  public ConstraintDef constraint(String name) {
    return tableDef.constraint(name);
  }

  @Override
  public ForeignKeyDefOnDelete onDelete(ForeignKeyAction option) {
    deleteAction = option;
    return this;
  }

  @Override
  public ForeignKeyDefOnUpdate onUpdate(ForeignKeyAction option) {
    updateAction = option;
    return this;
  }

  void addColumnRef(ColumnRef columnRef) {
    ForeignKeyPartDef partDef = new ForeignKeyPartDef(columnRef);
    foreignKeyPartDefList.add(partDef);
  }

  void addReferencedColumnRef(int index, ColumnRef columnRef) {
    foreignKeyPartDefList.get(index).references(columnRef);
  }

  private List foreignKeyPartList() {
    return WayIterables.from(foreignKeyPartDefList)
        .transform(ForeignKeyPartDefToForeignKeyPart.get())
        .toImmutableList();
  }

}