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/*
 * Copyright 2014-2015 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.sql;

import java.util.Objects;

import br.com.objectos.db.Condition;
import br.com.objectos.db.Selectable;
import br.com.objectos.db.StringTypeColumn;
import br.com.objectos.db.Variable;

/**
 * @author [email protected] (Marcio Endo)
 */
public class SimpleSelectWhere2String
    extends AbstractSimpleSelectWhere2
    implements
    SimpleSelectWhereString, V> {

  private final Keyword keyword;
  private final V first;

  SimpleSelectWhere2String(SelectNode> previous, Keyword keyword, V first) {
    super(previous);
    this.keyword = keyword;
    this.first = first;
  }

  @Override
  public SimpleSelectWhere2 eq(String value) {
    return comparison(StringComparison.EQ, value);
  }

  @Override
  public SimpleSelectWhere2 eq(StringTypeColumn column) {
    return comparison(StringComparison.EQ, column);
  }

  @Override
  public Var1SelectWhere2 eq(Variable variable) {
    return comparison(StringComparison.EQ, variable);
  }

  @Override
  public Var1SelectWhere2 like(Variable variable) {
    return comparison(StringComparison.LIKE, variable);
  }

  @Override
  public Var1SelectWhere2 notLike(Variable variable) {
    return comparison(StringComparison.NOT_LIKE, variable);
  }

  @Override
  Condition condition() {
    return StringComparison.EQ.ofColumn(first);
  }

  private SimpleSelectWhere2 comparison(StringComparison operator, String value) {
    Objects.requireNonNull(value);
    Condition condition = operator.ofColumn(first.withValue(value));
    return new SimpleSelectWhere2<>(this, condition);
  }

  private SimpleSelectWhere2 comparison(StringComparison operator, StringTypeColumn column) {
    Objects.requireNonNull(column);
    Condition condition = operator.ofColumn(first, column);
    return new SimpleSelectWhere2<>(this, condition);
  }

  private Var1SelectWhere2 comparison(StringComparison operator, Variable variable) {
    Condition condition = operator.ofVariable(first, variable.at(1));
    return new Var1SelectWhere2<>(this, keyword, condition);
  }

}