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#ifndef LBCRYPTO_CRYPTO_BASE_PRE_H
#define LBCRYPTO_CRYPTO_BASE_PRE_H

#include "key/privatekey-fwd.h"
#include "key/publickey-fwd.h"
#include "key/evalkey-fwd.h"
#include "utils/inttypes.h"
#include "ciphertext-fwd.h"

#include <vector>
#include <memory>

/**
 * @namespace lbcrypto
 * The namespace of lbcrypto
 */
namespace lbcrypto {

/**
 * @brief Abstract interface class for LBC PRE algorithms
 * @tparam Element a ring element.
 */
template <class Element>
class PREBase {
    using ParmType = typename Element::Params;
    using IntType  = typename Element::Integer;
    using DugType  = typename Element::DugType;
    using DggType  = typename Element::DggType;
    using TugType  = typename Element::TugType;

public:
    virtual ~PREBase() = default;

    /**
   * Virtual function to generate 1..log(q) encryptions for each bit of the
   * original private key Variant that uses the public key for the new secret
   * key.
   *
   * @param oldPrivateKey original private key used for decryption.
   * @param newPublicKey public key for the new secret key.
   * @return the re-encryption key.
   */
    virtual EvalKey<Element> ReKeyGen(const PrivateKey<Element> oldPrivateKey,
                                      const PublicKey<Element> newPublicKey) const;

    /**
   * Virtual function to define the interface for re-encypting ciphertext
   * using the array generated by ProxyGen
   *
   * @param &ciphertext the input ciphertext.
   * @param &evalKey proxy re-encryption key.
   * @param publicKey the public key of the recipient of the re-encrypted
   * ciphertext.
   * @return the ciphertext
   */
    virtual Ciphertext<Element> ReEncrypt(ConstCiphertext<Element> ciphertext, const EvalKey<Element> evalKey,
                                          const PublicKey<Element> publicKey) const;
};

}  // namespace lbcrypto

#endif
