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/*******************************************************************************
 *     ___                  _   ____  ____
 *    / _ \ _   _  ___  ___| |_|  _ \| __ )
 *   | | | | | | |/ _ \/ __| __| | | |  _ \
 *   | |_| | |_| |  __/\__ \ |_| |_| | |_) |
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 *
 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2020 QuestDB
 *
 *  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 io.questdb.cairo;

import io.questdb.cairo.sql.RecordMetadata;
import io.questdb.std.CharSequenceIntHashMap;
import io.questdb.std.ObjList;

public class GenericRecordMetadata extends BaseRecordMetadata {
    public GenericRecordMetadata() {
        this.columnMetadata = new ObjList<>();
        this.columnNameIndexMap = new CharSequenceIntHashMap();
        this.timestampIndex = -1;
    }

    public static void copyColumns(RecordMetadata from, GenericRecordMetadata to) {
        for (int i = 0, n = from.getColumnCount(); i < n; i++) {
            to.add(new TableColumnMetadata(
                    from.getColumnName(i).toString(),
                    from.getColumnType(i),
                    from.isColumnIndexed(i),
                    from.getIndexValueBlockCapacity(i)
            ));
        }
    }

    public static GenericRecordMetadata copyOf(RecordMetadata that) {
        GenericRecordMetadata metadata = copyOfSansTimestamp(that);
        metadata.setTimestampIndex(that.getTimestampIndex());
        return metadata;
    }

    public static GenericRecordMetadata copyOfSansTimestamp(RecordMetadata that) {
        GenericRecordMetadata metadata = new GenericRecordMetadata();
        copyColumns(that, metadata);
        return metadata;
    }

    public GenericRecordMetadata add(TableColumnMetadata meta) {
        int index = columnNameIndexMap.keyIndex(meta.getName());
        if (index > -1) {
            columnNameIndexMap.putAt(index, meta.getName(), columnCount);
            columnMetadata.add(meta);
            columnCount++;
            return this;
        } else {
            throw CairoException.instance(0).put("Duplicate column [name=").put(meta.getName()).put(']');
        }
    }

    public void clear() {
        columnMetadata.clear();
        columnNameIndexMap.clear();
        columnCount = 0;
        timestampIndex = -1;
    }

    public void setTimestampIndex(int index) {
        this.timestampIndex = index;
    }
}