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package io.deephaven.engine.table.impl.updateby.fill;

import io.deephaven.base.verify.Assert;
import io.deephaven.chunk.CharChunk;
import io.deephaven.chunk.Chunk;
import io.deephaven.chunk.attributes.Values;
import io.deephaven.engine.table.impl.MatchPair;
import io.deephaven.engine.table.impl.updateby.UpdateByOperator;
import io.deephaven.engine.table.impl.updateby.internal.BaseCharUpdateByOperator;
import io.deephaven.engine.table.impl.util.RowRedirection;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import static io.deephaven.util.QueryConstants.NULL_CHAR;

public class CharFillByOperator extends BaseCharUpdateByOperator {
    // region extra-fields
    // endregion extra-fields

    protected class Context extends BaseCharUpdateByOperator.Context {
        public CharChunk charValueChunk;

        protected Context(final int chunkSize) {
            super(chunkSize);
        }

        @Override
        public void setValueChunks(@NotNull final Chunk[] valueChunks) {
            charValueChunk = valueChunks[0].asCharChunk();
        }

        @Override
        public void push(int pos, int count) {
            Assert.eq(count, "push count", 1);

            char val = charValueChunk.get(pos);
            if(val != NULL_CHAR) {
                curVal = val;
            }
        }
    }

    public CharFillByOperator(@NotNull final MatchPair fillPair,
                              @Nullable final RowRedirection rowRedirection
                              // region extra-constructor-args
                              // endregion extra-constructor-args
                              ) {
        super(fillPair, new String[] { fillPair.rightColumn }, rowRedirection);
        // region constructor
        // endregion constructor
    }

    @NotNull
    @Override
    public UpdateByOperator.Context makeUpdateContext(final int affectedChunkSize, final int influencerChunkSize) {
        return new Context(affectedChunkSize);
    }

    // region extra-methods
    // endregion extra-methods
}