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/*******************************************************************************
 * Copyright 2013 Francesco Cina'
 *
 * 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 com.jporm.rm.query.save;

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

import com.jporm.commons.core.inject.ClassTool;
import com.jporm.commons.core.query.SqlFactory;
import com.jporm.commons.core.query.cache.SqlCache;
import com.jporm.commons.core.query.save.SaveQueryBase;
import com.jporm.persistor.Persistor;
import com.jporm.rm.session.SqlExecutor;
import com.jporm.sql.dialect.DBProfile;
import com.jporm.types.io.GeneratedKeyReader;
import com.jporm.types.io.ResultSet;

/**
 *
 * @author Francesco Cina
 *
 *         10/lug/2011
 */
public class SaveQueryImpl extends SaveQueryBase implements SaveQuery {

    private final Collection beans;
    private final SqlExecutor sqlExecutor;
    private final ClassTool ormClassTool;

    public SaveQueryImpl(final Collection beans, final Class clazz, final ClassTool ormClassTool, final SqlCache sqlCache, final SqlExecutor sqlExecutor,
            final SqlFactory sqlFactory, DBProfile dbProfile) {
        super(clazz, sqlCache);
        this.beans = beans;
        this.ormClassTool = ormClassTool;
        this.sqlExecutor = sqlExecutor;
    }

    @Override
    public List execute() {
        List result = new ArrayList<>();
        for (BEAN bean : beans) {
            result.add(save(ormClassTool.getPersistor().clone(bean)));
        }
        return result;
    }

    private BEAN save(final BEAN bean) {

        final Persistor persistor = ormClassTool.getPersistor();

        // CHECK IF OBJECT HAS A 'VERSION' FIELD and increase it
        persistor.increaseVersion(bean, true);
        boolean useGenerator = ormClassTool.getPersistor().useGenerators(bean);
        String sql = getCacheableQuery(useGenerator);
        if (!useGenerator) {
            String[] keys = ormClassTool.getDescriptor().getAllColumnJavaNames();
            Object[] values = persistor.getPropertyValues(keys, bean);
            sqlExecutor.update(sql, values);
        } else {
            final GeneratedKeyReader generatedKeyExtractor = GeneratedKeyReader.get(ormClassTool.getDescriptor().getAllGeneratedColumnDBNames(),
                    (final ResultSet generatedKeyResultSet, Integer affectedRows) -> {
                        if (generatedKeyResultSet.hasNext()) {
                            persistor.updateGeneratedValues(generatedKeyResultSet.next(), bean);
                        }
                        return null;
                    });
            String[] keys = ormClassTool.getDescriptor().getAllNotGeneratedColumnJavaNames();
            Object[] values = persistor.getPropertyValues(keys, bean);
            sqlExecutor.update(sql, values, generatedKeyExtractor);
        }
        return bean;

    }

}