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// to you 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
//
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package org.apache.doris.nereids.trees.plans.physical;

import org.apache.doris.nereids.memo.GroupExpression;
import org.apache.doris.nereids.properties.LogicalProperties;
import org.apache.doris.nereids.properties.PhysicalProperties;
import org.apache.doris.nereids.trees.expressions.CTEId;
import org.apache.doris.nereids.trees.expressions.Expression;
import org.apache.doris.nereids.trees.plans.Plan;
import org.apache.doris.nereids.trees.plans.PlanType;
import org.apache.doris.nereids.trees.plans.visitor.PlanVisitor;
import org.apache.doris.nereids.util.Utils;
import org.apache.doris.statistics.Statistics;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

import java.util.List;
import java.util.Objects;
import java.util.Optional;

/**
 * Physical CTE anchor.
 */
public class PhysicalCTEAnchor<
        LEFT_CHILD_TYPE extends Plan,
        RIGHT_CHILD_TYPE extends Plan>
        extends PhysicalBinary<LEFT_CHILD_TYPE, RIGHT_CHILD_TYPE> {
    private final CTEId cteId;

    public PhysicalCTEAnchor(CTEId cteId, LogicalProperties logicalProperties,
                             LEFT_CHILD_TYPE leftChild,
                             RIGHT_CHILD_TYPE rightChild) {
        this(cteId, Optional.empty(), logicalProperties, leftChild, rightChild);
    }

    public PhysicalCTEAnchor(CTEId cteId, Optional<GroupExpression> groupExpression,
                             LogicalProperties logicalProperties,
                             LEFT_CHILD_TYPE leftChild,
                             RIGHT_CHILD_TYPE rightChild) {
        this(cteId, groupExpression, logicalProperties, null, null, leftChild, rightChild);
    }

    public PhysicalCTEAnchor(CTEId cteId, Optional<GroupExpression> groupExpression,
                             LogicalProperties logicalProperties, PhysicalProperties physicalProperties,
                             Statistics statistics, LEFT_CHILD_TYPE leftChild,
                             RIGHT_CHILD_TYPE rightChild) {
        super(PlanType.PHYSICAL_CTE_ANCHOR, groupExpression, logicalProperties, physicalProperties, statistics,
                leftChild, rightChild);
        this.cteId = cteId;
    }

    public CTEId getCteId() {
        return cteId;
    }

    @Override
    public List<Expression> getExpressions() {
        return ImmutableList.of();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }

        if (!super.equals(o)) {
            return false;
        }

        PhysicalCTEAnchor that = (PhysicalCTEAnchor) o;
        return Objects.equals(cteId, that.cteId);
    }

    @Override
    public int hashCode() {
        return Objects.hash(super.hashCode(), cteId);
    }

    @Override
    public String toString() {
        return Utils.toSqlString("PhysicalCTEAnchor", "cteId", cteId);
    }

    @Override
    public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
        return visitor.visitPhysicalCTEAnchor(this, context);
    }

    @Override
    public PhysicalCTEAnchor<Plan, Plan> withChildren(List<Plan> children) {
        Preconditions.checkArgument(children.size() == 2);
        return new PhysicalCTEAnchor<>(cteId, groupExpression, getLogicalProperties(), physicalProperties,
            statistics, children.get(0), children.get(1));
    }

    @Override
    public PhysicalCTEAnchor<Plan, Plan> withGroupExpression(Optional<GroupExpression> groupExpression) {
        return new PhysicalCTEAnchor<>(cteId, groupExpression, getLogicalProperties(), child(0), child(1));
    }

    @Override
    public PhysicalCTEAnchor<Plan, Plan> withLogicalProperties(Optional<LogicalProperties> logicalProperties) {
        return new PhysicalCTEAnchor<>(cteId,
                Optional.empty(), logicalProperties.get(), child(0), child(1));
    }

    @Override
    public PhysicalCTEAnchor<Plan, Plan> withPhysicalPropertiesAndStats(PhysicalProperties physicalProperties,
                                                                        Statistics statistics) {
        return new PhysicalCTEAnchor<>(cteId, groupExpression, getLogicalProperties(), physicalProperties,
            statistics, child(0), child(1));
    }

    @Override
    public String shapeInfo() {
        return Utils.toSqlString("CteAnchor[cteId=", cteId, "]");
    }
}
