/*
 * DBeaver - Universal Database Manager
 * Copyright (C) 2010-2023 DBeaver Corp and others
 *
 * 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 org.jkiss.dbeaver.ext.bigquery.model;

import org.jkiss.code.NotNull;
import org.jkiss.code.Nullable;
import org.jkiss.dbeaver.DBException;
import org.jkiss.dbeaver.ext.generic.model.GenericDataSource;
import org.jkiss.dbeaver.ext.generic.model.meta.GenericMetaModel;
import org.jkiss.dbeaver.model.DBPDataSourceContainer;
import org.jkiss.dbeaver.model.DBPErrorAssistant;
import org.jkiss.dbeaver.model.exec.DBCQueryTransformProvider;
import org.jkiss.dbeaver.model.exec.DBCQueryTransformType;
import org.jkiss.dbeaver.model.exec.DBCQueryTransformer;
import org.jkiss.dbeaver.model.impl.sql.QueryTransformerLimit;
import org.jkiss.dbeaver.model.runtime.DBRProgressMonitor;
import org.jkiss.utils.CommonUtils;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * BigQuery meta model
 */
public class BigQueryMetaModel extends GenericMetaModel implements DBCQueryTransformProvider {

    private Pattern ERROR_POSITION_PATTERN = Pattern.compile(" at \\[([0-9]+)\\:([0-9]+)\\]");

    public BigQueryMetaModel() {
    }

    @Override
    public GenericDataSource createDataSourceImpl(DBRProgressMonitor monitor, DBPDataSourceContainer container) throws DBException {
        return new BigQueryDataSource(monitor, container, this);
    }

    @Nullable
    @Override
    public DBCQueryTransformer createQueryTransformer(@NotNull DBCQueryTransformType type) {
        if (type == DBCQueryTransformType.RESULT_SET_LIMIT) {
            return new QueryTransformerLimit(false);
        }
        return null;
    }

    @Override
    public DBPErrorAssistant.ErrorPosition getErrorPosition(Throwable error) {
        String message = error.getMessage();
        if (!CommonUtils.isEmpty(message)) {
            Matcher matcher = ERROR_POSITION_PATTERN.matcher(message);
            if (matcher.find()) {
                DBPErrorAssistant.ErrorPosition pos = new DBPErrorAssistant.ErrorPosition();
                pos.line = Integer.parseInt(matcher.group(1)) - 1;
                pos.position = Integer.parseInt(matcher.group(2)) - 1;
                return pos;
            }
        }
        return null;
    }

}
