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/*
 * 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.trino.metadata;

import io.trino.spi.block.ArrayBlockEncoding;
import io.trino.spi.block.BlockEncoding;
import io.trino.spi.block.ByteArrayBlockEncoding;
import io.trino.spi.block.DictionaryBlockEncoding;
import io.trino.spi.block.Fixed12BlockEncoding;
import io.trino.spi.block.Int128ArrayBlockEncoding;
import io.trino.spi.block.IntArrayBlockEncoding;
import io.trino.spi.block.LazyBlockEncoding;
import io.trino.spi.block.LongArrayBlockEncoding;
import io.trino.spi.block.MapBlockEncoding;
import io.trino.spi.block.RowBlockEncoding;
import io.trino.spi.block.RunLengthBlockEncoding;
import io.trino.spi.block.ShortArrayBlockEncoding;
import io.trino.spi.block.VariableWidthBlockEncoding;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;

public final class BlockEncodingManager
{
    private final Map blockEncodings = new ConcurrentHashMap<>();

    public BlockEncodingManager()
    {
        // add the built-in BlockEncodings
        addBlockEncoding(new VariableWidthBlockEncoding());
        addBlockEncoding(new ByteArrayBlockEncoding());
        addBlockEncoding(new ShortArrayBlockEncoding());
        addBlockEncoding(new IntArrayBlockEncoding());
        addBlockEncoding(new LongArrayBlockEncoding());
        addBlockEncoding(new Fixed12BlockEncoding());
        addBlockEncoding(new Int128ArrayBlockEncoding());
        addBlockEncoding(new DictionaryBlockEncoding());
        addBlockEncoding(new ArrayBlockEncoding());
        addBlockEncoding(new MapBlockEncoding());
        addBlockEncoding(new RowBlockEncoding());
        addBlockEncoding(new RunLengthBlockEncoding());
        addBlockEncoding(new LazyBlockEncoding());
    }

    public BlockEncoding getBlockEncoding(String encodingName)
    {
        BlockEncoding blockEncoding = blockEncodings.get(encodingName);
        checkArgument(blockEncoding != null, "Unknown block encoding: %s", encodingName);
        return blockEncoding;
    }

    public void addBlockEncoding(BlockEncoding blockEncoding)
    {
        requireNonNull(blockEncoding, "blockEncoding is null");
        BlockEncoding existingEntry = blockEncodings.putIfAbsent(blockEncoding.getName(), blockEncoding);
        checkArgument(existingEntry == null, "Encoding already registered: %s", blockEncoding.getName());
    }
}