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 *    along with this program. If not, see
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 *    code of portions of this program with the OpenSSL library under certain
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#pragma once

#include "mongo/db/query/optimizer/index_bounds.h"

namespace mongo::optimizer {

/**
 * Intersects or unions two intervals without simplification which might depend on multi-keyness.
 * Currently assumes intervals are in DNF.
 * TODO: handle generic interval expressions (not necessarily DNF).
 */
void combineIntervalsDNF(bool intersect,
                         IntervalReqExpr::Node& target,
                         const IntervalReqExpr::Node& source);

/**
 * Intersect all intervals within each conjunction of intervals in a disjunction of intervals.
 * Notice that all intervals reference the same path (which is an index field).
 * Return a DNF of the intersected intervals, where there is at most one interval inside each
 * conjunct. If the resulting interval is empty, return boost::none.
 * The intervals themselves can contain Constants, Variables, or arbitrary arithmetic expressions.
 * TODO: handle generic interval expressions (not necessarily DNF).
 */
boost::optional<IntervalReqExpr::Node> intersectDNFIntervals(
    const IntervalReqExpr::Node& intervalDNF);

/**
 * Combines a source interval over a single path with a target multi-component interval. The
 * multi-component interval is extended to contain an extra field. The resulting multi-component
 * interval defined the boundaries over the index component used by the index access execution
 * operator. If we fail to combine, the target multi-key interval is left unchanged.
 * Currently we only support a single "equality prefix": 0+ equalities followed by at most
 * inequality, and trailing open intervals.
 * TODO: support Recursive Index Navigation.
 */
bool combineMultiKeyIntervalsDNF(MultiKeyIntervalReqExpr::Node& targetIntervals,
                                 const IntervalReqExpr::Node& sourceIntervals);

}  // namespace mongo::optimizer