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/*
 * Copyright 2024 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.sql.impl.expression.Expression;
import com.hazelcast.shaded.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.shaded.org.apache.calcite.plan.RelOptCost;
import com.hazelcast.shaded.org.apache.calcite.plan.RelOptPlanner;
import com.hazelcast.shaded.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.shaded.org.apache.calcite.rel.RelNode;
import com.hazelcast.shaded.org.apache.calcite.rel.RelWriter;
import com.hazelcast.shaded.org.apache.calcite.rel.SingleRel;
import com.hazelcast.shaded.org.apache.calcite.rel.metadata.RelMetadataQuery;
import com.hazelcast.shaded.org.checkerframework.checker.nullness.qual.Nullable;

import java.util.List;

public class WatermarkLogicalRel extends SingleRel implements LogicalRel {
    private final Expression lagExpression;
    private final int watermarkedColumnIndex;

    WatermarkLogicalRel(
            RelOptCluster cluster,
            RelTraitSet traits,
            RelNode input,
            Expression lagExpression,
            int watermarkedColumnIndex
    ) {
        super(cluster, traits, input);

        this.lagExpression = lagExpression;
        this.watermarkedColumnIndex = watermarkedColumnIndex;
    }

    public Expression lagExpression() {
        return lagExpression;
    }

    public int watermarkedColumnIndex() {
        return watermarkedColumnIndex;
    }

    @Override
    public RelWriter explainTerms(RelWriter pw) {
        return super.explainTerms(pw)
                .item("watermarkedColumnIndex", watermarkedColumnIndex);
    }

    @Override
    public @Nullable
    RelOptCost computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq) {
        return planner.getCostFactory().makeHugeCost();
    }

    @Override
    public RelNode copy(RelTraitSet traitSet, List inputs) {
        return new WatermarkLogicalRel(
                getCluster(),
                traitSet,
                sole(inputs),
                lagExpression,
                watermarkedColumnIndex
        );
    }
}