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/*
 * Copyright 2016 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.schema;

import java.util.ArrayList;
import java.util.List;

import br.com.objectos.core.util.MoreCollectors;
import br.com.objectos.schema.info.StringColumnKind;

/**
 * @author [email protected] (Marcio Endo)
 */
class AlterTableDslPojo
    implements
    AlterTableDsl,
    AddColumnDsl,
    DropColumnDsl {

  private final String tableName;
  private final List columnDdlBuilderList = new ArrayList<>();

  private ColumnName columnName;

  public AlterTableDslPojo(String tableName) {
    this.tableName = tableName;
  }

  @Override
  public AddColumnDsl addColumn(String columnName) {
    this.columnName = Columns.named(columnName);
    return this;
  }

  @Override
  public AlterTable compile() {
    return new AlterTable(
        tableName,
        columnDdlBuilderList.stream()
            .map(ColumnDdlBuilder::build)
            .collect(MoreCollectors.toImmutableList()));
  }

  @Override
  public DropColumnDsl dropColumn(String columnName) {
    DropColumn pojo = DropColumn.of(columnName);
    columnDdlBuilderList.add(pojo);
    return this;
  }

  @Override
  public StringAddColumnDsl varchar(int length) {
    StringAddColumnDslPojo pojo = new StringAddColumnDslPojo(this, columnName, StringColumnKind.VARCHAR, length);
    columnDdlBuilderList.add(pojo);
    return pojo;
  }

}