/*
 * 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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
 * database integrations.
 *
 * For more information, please visit: http://www.jooq.org/licenses
 *
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 *
 */
package org.jooq.util.h2;

import static org.jooq.tools.StringUtils.defaultString;
import static org.jooq.util.h2.information_schema.tables.Columns.COLUMNS;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.jooq.Record;
import org.jooq.util.AbstractTableDefinition;
import org.jooq.util.ColumnDefinition;
import org.jooq.util.DataTypeDefinition;
import org.jooq.util.DefaultColumnDefinition;
import org.jooq.util.DefaultDataTypeDefinition;
import org.jooq.util.SchemaDefinition;
import org.jooq.util.h2.information_schema.tables.Columns;

/**
 * H2 table definition
 *
 * @author Espen Stromsnes
 * @author Oliver Flege
 */
public class H2TableDefinition extends AbstractTableDefinition {

    public H2TableDefinition(SchemaDefinition schema, String name, String comment) {
        super(schema, name, comment);
    }

    @Override
    public List<ColumnDefinition> getElements0() throws SQLException {
        List<ColumnDefinition> result = new ArrayList<ColumnDefinition>();

        for (Record record : create().select(
                Columns.COLUMN_NAME,
                Columns.ORDINAL_POSITION,
                Columns.TYPE_NAME,
                Columns.CHARACTER_MAXIMUM_LENGTH,
                Columns.NUMERIC_PRECISION,
                Columns.NUMERIC_SCALE,
                Columns.IS_NULLABLE,
                Columns.COLUMN_DEFAULT,
                Columns.REMARKS,
                Columns.SEQUENCE_NAME)
            .from(COLUMNS)
            .where(Columns.TABLE_SCHEMA.equal(getSchema().getName()))
            .and(Columns.TABLE_NAME.equal(getName()))
            .orderBy(Columns.ORDINAL_POSITION)
            .fetch()) {

            DataTypeDefinition type = new DefaultDataTypeDefinition(
                getDatabase(),
                getSchema(),
                record.get(Columns.TYPE_NAME),
                record.get(Columns.CHARACTER_MAXIMUM_LENGTH),
                record.get(Columns.NUMERIC_PRECISION),
                record.get(Columns.NUMERIC_SCALE),
                record.get(Columns.IS_NULLABLE, boolean.class),
                record.get(Columns.COLUMN_DEFAULT));

            ColumnDefinition column = new DefaultColumnDefinition(
            	getDatabase().getTable(getSchema(), getName()),
                record.get(Columns.COLUMN_NAME),
                record.get(Columns.ORDINAL_POSITION),
                type,

                // [#5331] AUTO_INCREMENT (MySQL style)
                null != record.get(Columns.SEQUENCE_NAME)

                // [#5331] DEFAULT nextval('sequence') (PostgreSQL style)
             || defaultString(record.get(Columns.COLUMN_DEFAULT)).trim().toLowerCase().startsWith("nextval"),
                record.get(Columns.REMARKS));

            result.add(column);
        }

        return result;
    }
}