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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.way.sql;

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

import br.com.objectos.way.db.Dialect;
import br.com.objectos.way.db.GeneratedKeyListener;
import br.com.objectos.way.db.InsertBuilder;
import br.com.objectos.way.db.ParameterBinder;
import br.com.objectos.way.db.Result;
import br.com.objectos.way.db.SqlBuilder;
import br.com.objectos.way.db.SqlStatement;
import br.com.objectos.way.db.Transaction;

/**
 * @author [email protected] (Marcio Endo)
 */
class SimpleInsertQuery implements InsertQuery {

  private final Dialect dialect;
  private final InsertNode node;

  public SimpleInsertQuery(Dialect dialect, InsertNode node) {
    this.dialect = dialect;
    this.node = node;
  }

  @Override
  public int execute(Transaction trx) {
    List listenerList = new ArrayList<>();
    node.acceptListenerList(listenerList);

    SqlBuilder sql = sql().unwrap();
    SqlStatement stmt = listenerList.isEmpty()
        ? trx.prepare(sql)
        : trx.prepareAndGenerateKeys(sql);
    ParameterBinder binder = stmt.parameterBinder();

    node.bind(binder);

    int res = stmt.executeUpdate();

    if (!listenerList.isEmpty()) {
      Result generatedKeys = stmt.generatedKeys();
      for (GeneratedKeyListener listener : listenerList) {
        listener.onGeneratedKey(generatedKeys);
      }
    }

    return res;
  }

  @Override
  public String toString() {
    return sql().toString();
  }

  private InsertBuilder sql() {
    InsertBuilder sql = dialect.sqlBuilder().toInsertBuilder();
    node.write(sql);
    return sql;
  }

}