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//
//
// Copyright (C) 2020 Schrödinger, LLC
//
// @@ All Rights Reserved @@
// This file is part of the RDKit.
// The contents are covered by the terms of the BSD license
// which is included in the file license.txt, found at the root
// of the RDKit source tree.
//
#pragma once
#include <vector>
#include "Descriptor.h"
#include "Mancude.h"
#include "Edge.h"
namespace RDKit {
class Atom;
namespace CIPLabeler {
class Digraph;
class Node {
public:
/**
* Flag indicates whether the node has been expanded.
*/
static const int EXPANDED = 0x1;
/**
* Flag indicates whether the node was duplicated
* at a ring closure.
*/
static const int RING_DUPLICATE = 0x2;
/**
* Flag indicates whether the node was duplicated
* at a bond with order > 1.
*/
static const int BOND_DUPLICATE = 0x4;
/**
* Mask to check if a node is duplicated.
*/
static const int DUPLICATE = 0x6;
/**
* Node was created for an implicit hydrogen,
* the 'atom' value will be null.
*/
static const int IMPL_HYDROGEN = 0x8;
Node() = delete;
Node(const Node &) = delete;
Node &operator=(const Node &) = delete;
Node(Digraph *g, std::vector<char> &&visit, Atom *atom,
boost::rational<int> &&frac, int dist, int flags);
Digraph *getDigraph() const;
Atom *getAtom() const;
int getDistance() const;
boost::rational<int> getAtomicNumFraction() const;
int getAtomicNum() const;
unsigned getMassNum() const;
double getAtomicMass() const;
Descriptor getAux() const;
bool isSet(int mask) const;
bool isDuplicate() const;
bool isTerminal() const;
bool isExpanded() const;
bool isVisited(int idx) const;
Node *newChild(int idx, Atom *atom) const;
Node *newBondDuplicateChild(int idx, Atom *atom) const;
Node *newRingDuplicateChild(int idx, Atom *atom) const;
Node *newImplicitHydrogenChild() const;
void add(Edge *e);
void setAux(Descriptor desc);
const std::vector<Edge *> &getEdges() const;
std::vector<Edge *> getEdges(Atom *end) const;
std::vector<Edge *> getNonTerminalOutEdges() const;
private:
Digraph *dp_g;
Atom *dp_atom;
int d_dist;
boost::rational<int> d_atomic_num;
double d_atomic_mass;
Descriptor d_aux = Descriptor::NONE;
int d_flags = 0x0;
std::vector<Edge *> d_edges;
std::vector<char> d_visit;
Node *newTerminalChild(int idx, Atom *atom, int flags) const;
};
} // namespace CIPLabeler
} // namespace RDKit
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