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 *
 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2022 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.
 *
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package io.questdb.cairo;

import io.questdb.cairo.vm.api.MemoryMA;
import io.questdb.std.FilesFacade;
import io.questdb.std.MemoryTag;
import io.questdb.std.str.Path;

import static io.questdb.cairo.TableUtils.charFileName;
import static io.questdb.cairo.TableUtils.offsetFileName;

public interface MapWriter extends SymbolCountProvider {
    static void createSymbolMapFiles(
            FilesFacade ff,
            MemoryMA mem,
            Path path,
            CharSequence columnName,
            long columnNameTxn,
            int symbolCapacity,
            boolean symbolCacheFlag
    ) {
        int plen = path.length();
        try {
            mem.wholeFile(ff, offsetFileName(path.trimTo(plen), columnName, columnNameTxn), MemoryTag.MMAP_INDEX_WRITER);
            mem.jumpTo(0);
            mem.putInt(symbolCapacity);
            mem.putBool(symbolCacheFlag);
            mem.jumpTo(SymbolMapWriter.HEADER_SIZE);
            mem.close();

            if (!ff.touch(charFileName(path.trimTo(plen), columnName, columnNameTxn))) {
                throw CairoException.instance(ff.errno()).put("Cannot create ").put(path);
            }

            mem.smallFile(ff, BitmapIndexUtils.keyFileName(path.trimTo(plen), columnName, columnNameTxn), MemoryTag.MMAP_INDEX_WRITER);
            BitmapIndexWriter.initKeyMemory(mem, TableUtils.MIN_INDEX_VALUE_BLOCK_SIZE);
            ff.touch(BitmapIndexUtils.valueFileName(path.trimTo(plen), columnName, columnNameTxn));
        } finally {
            mem.close();
            path.trimTo(plen);
        }
    }

    boolean isCached();

    int put(char c);

    int put(CharSequence symbol);

    int put(CharSequence symbol, SymbolValueCountCollector valueCountCollector);

    void rollback(int symbolCount);

    void setSymbolIndexInTxWriter(int symbolIndexInTxWriter);

    void truncate();

    void updateCacheFlag(boolean flag);

    void updateNullFlag(boolean flag);
}