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/*
 * Copyright 2021 Hazelcast Inc.
 *
 * Licensed under the Hazelcast Community License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://hazelcast.com/hazelcast-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.jet.sql.impl.opt.logical;

import com.hazelcast.jet.sql.impl.opt.ExpressionValues;
import com.hazelcast.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.AbstractRelNode;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.RelWriter;
import com.hazelcast.org.apache.calcite.rel.type.RelDataType;

import java.util.List;
import java.util.stream.Collectors;

public class ValuesLogicalRel extends AbstractRelNode implements LogicalRel {

    private final List values;

    ValuesLogicalRel(
            RelOptCluster cluster,
            RelTraitSet traits,
            RelDataType rowType,
            List values
    ) {
        super(cluster, traits);

        this.rowType = rowType;
        this.values = values;
    }

    public int size() {
        return values.stream().mapToInt(ExpressionValues::size).sum();
    }

    public List values() {
        return values;
    }

    @Override
    public RelNode copy(RelTraitSet traitSet, List inputs) {
        return new ValuesLogicalRel(getCluster(), traitSet, getRowType(), values);
    }

    @Override
    public RelWriter explainTerms(RelWriter pw) {
        return super.explainTerms(pw)
                .item("values", values.stream().map(ExpressionValues::toString).collect(Collectors.joining(", ")));
    }
}