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package org.jumpmind.db.platform.hsqldb2;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Map;

import org.apache.commons.lang.StringUtils;
import org.jumpmind.db.model.Column;
import org.jumpmind.db.model.ForeignKey;
import org.jumpmind.db.model.IIndex;
import org.jumpmind.db.model.Table;
import org.jumpmind.db.model.TypeMap;
import org.jumpmind.db.platform.AbstractJdbcDdlReader;
import org.jumpmind.db.platform.DatabaseMetaDataWrapper;
import org.jumpmind.db.platform.IDatabasePlatform;

/*
 * Reads a database model from a HsqlDb database.
 */
public class HsqlDb2DdlReader extends AbstractJdbcDdlReader {

    public HsqlDb2DdlReader(IDatabasePlatform platform) {
        super(platform);
        setDefaultCatalogPattern(null);
        setDefaultSchemaPattern(null);
    }

    @Override
    protected Column readColumn(DatabaseMetaDataWrapper metaData, Map values)
            throws SQLException {
        Column column = super.readColumn(metaData, values);

        if (TypeMap.isTextType(column.getMappedTypeCode()) && (column.getDefaultValue() != null)) {
            column.setDefaultValue(unescape(column.getDefaultValue(), "'", "''"));
        }

        String autoIncrement = (String) values.get("IS_AUTOINCREMENT");
        if (autoIncrement != null) {
            column.setAutoIncrement("YES".equalsIgnoreCase(autoIncrement.trim()));
        }
        return column;
    }

    @Override
    protected boolean isInternalForeignKeyIndex(Connection connection,
            DatabaseMetaDataWrapper metaData, Table table, ForeignKey fk, IIndex index) {
        String name = index.getName();

        return (name != null) && name.startsWith("SYS_IDX_");
    }

    @Override
    protected boolean isInternalPrimaryKeyIndex(Connection connection,
            DatabaseMetaDataWrapper metaData, Table table, IIndex index) {
        String name = index.getName();

        return (name != null) && (name.startsWith("SYS_PK_") || name.startsWith("SYS_IDX_"));
    }

    @Override
    protected Integer mapUnknownJdbcTypeForColumn(Map values) {
        String typeName = (String) values.get("TYPE_NAME");
        String size = (String) values.get("COLUMN_SIZE");
        if (typeName != null && typeName.startsWith("VARCHAR") && StringUtils.isNotBlank(size)) {
            long sizeAsNumber = Long.parseLong(size);
            if (sizeAsNumber >= 16777216) {
                return Types.LONGVARCHAR;
            } else {
                return super.mapUnknownJdbcTypeForColumn(values);
            }
        } else {
            return super.mapUnknownJdbcTypeForColumn(values);
        }
    }

}