/******************************************************************************

 * Top contributors (to current version):

 *   Liana Hadarean, Mathias Preiner, Dejan Jovanovic

 *

 * This file is part of the cvc5 project.

 *

 * Copyright (c) 2009-2021 by the authors listed in the file AUTHORS

 * in the top-level source directory and their institutional affiliations.

 * All rights reserved.  See the file COPYING in the top-level source

 * directory for licensing information.

 * ****************************************************************************

 *

 * Algebraic solver.

 */

#include "cvc5_private.h"

#pragma once

#include <unordered_map>

#include "theory/bv/bv_subtheory.h"

namespace cvc5 {

namespace theory {

namespace bv {

class TLazyBitblaster;

class AbstractionModule;

class BVQuickCheck;

class QuickXPlain;

/**

 * BitblastSolver

 */

class BitblastSolver : public SubtheorySolver

{

  struct Statistics

  {

    IntStat d_numCallstoCheck;

    IntStat d_numBBLemmas;

    Statistics();

  };

  /** Bitblaster */

  std::unique_ptr<TLazyBitblaster> d_bitblaster;

  /** Nodes that still need to be bit-blasted */

  context::CDQueue<TNode> d_bitblastQueue;

  Statistics d_statistics;

  typedef std::unordered_map<Node, Node> NodeMap;

  NodeMap d_modelCache;

  context::CDO<bool> d_validModelCache;

  /** Queue for bit-blasting lemma atoms only in full check if we are sat */

  context::CDQueue<TNode> d_lemmaAtomsQueue;

  bool d_useSatPropagation;

  AbstractionModule* d_abstractionModule;

  std::unique_ptr<BVQuickCheck> d_quickCheck;

  std::unique_ptr<QuickXPlain> d_quickXplain;

  //  Node getModelValueRec(TNode node);

  void setConflict(TNode conflict);

 public:

  BitblastSolver(context::Context* c, BVSolverLayered* bv);

  ~BitblastSolver();

  void preRegister(TNode node) override;

  bool check(Theory::Effort e) override;

  void explain(TNode literal, std::vector<TNode>& assumptions) override;

  EqualityStatus getEqualityStatus(TNode a, TNode b) override;

  bool collectModelValues(TheoryModel* m,

                          const std::set<Node>& termSet) override;

  Node getModelValue(TNode node) override;

  void bitblastQueue();

  void setAbstraction(AbstractionModule* module);

  uint64_t computeAtomWeight(TNode atom);

};

}  // namespace bv

}  // namespace theory

}  // namespace cvc5