/* XMRig
 * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
 * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
 * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
 * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
 * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
 * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
 * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
 * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
 * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef XMRIG_ALGORITHM_H
#define XMRIG_ALGORITHM_H


#include <vector>


#include "3rdparty/rapidjson/fwd.h"


namespace xmrig {


class Algorithm
{
public:
    // Changes in following file is required if this enum changed:
    //
    // src/backend/opencl/cl/cn/algorithm.cl
    //
    enum Id : int {
        INVALID = -1,
        CN_0,          // "cn/0"             CryptoNight (original).
        CN_1,          // "cn/1"             CryptoNight variant 1 also known as Monero7 and CryptoNightV7.
        CN_2,          // "cn/2"             CryptoNight variant 2.
        CN_R,          // "cn/r"             CryptoNightR (Monero's variant 4).
        CN_FAST,       // "cn/fast"          CryptoNight variant 1 with half iterations.
        CN_HALF,       // "cn/half"          CryptoNight variant 2 with half iterations (Masari/Torque).
        CN_XAO,        // "cn/xao"           CryptoNight variant 0 (modified, Alloy only).
        CN_RTO,        // "cn/rto"           CryptoNight variant 1 (modified, Arto only).
        CN_RWZ,        // "cn/rwz"           CryptoNight variant 2 with 3/4 iterations and reversed shuffle operation (Graft).
        CN_ZLS,        // "cn/zls"           CryptoNight variant 2 with 3/4 iterations (Zelerius).
        CN_DOUBLE,     // "cn/double"        CryptoNight variant 2 with double iterations (X-CASH).
        CN_LITE_0,     // "cn-lite/0"        CryptoNight-Lite variant 0.
        CN_LITE_1,     // "cn-lite/1"        CryptoNight-Lite variant 1.
        CN_HEAVY_0,    // "cn-heavy/0"       CryptoNight-Heavy (4 MB).
        CN_HEAVY_TUBE, // "cn-heavy/tube"    CryptoNight-Heavy (modified, TUBE only).
        CN_HEAVY_XHV,  // "cn-heavy/xhv"     CryptoNight-Heavy (modified, Haven Protocol only).
        CN_PICO_0,     // "cn-pico"          CryptoNight-Pico
        CN_PICO_TLO,   // "cn-pico/tlo"      CryptoNight-Pico (TLO)
        CN_CCX,        // "cn/ccx"           Conceal (CCX)
        RX_0,          // "rx/0"             RandomX (reference configuration).
        RX_WOW,        // "rx/wow"           RandomWOW (Wownero).
        RX_ARQ,        // "rx/arq"           RandomARQ (Arqma).
        RX_SFX,        // "rx/sfx"           RandomSFX (Safex Cash).
        RX_KEVA,       // "rx/keva"          RandomKEVA (Keva).
        AR2_CHUKWA,    // "argon2/chukwa"    Argon2id (Chukwa).
        AR2_CHUKWA_V2, // "argon2/chukwav2"  Argon2id (Chukwa v2).
        AR2_WRKZ,      // "argon2/wrkz"      Argon2id (WRKZ)
        ASTROBWT_DERO, // "astrobwt"         AstroBWT (Dero)
        KAWPOW_RVN,    // "kawpow/rvn"       KawPow (RVN)
        MAX
    };

    enum Family : int {
        UNKNOWN,
        CN,
        CN_LITE,
        CN_HEAVY,
        CN_PICO,
        RANDOM_X,
        ARGON2,
        ASTROBWT,
        KAWPOW
    };

    inline Algorithm() = default;
    inline Algorithm(const char *algo) : m_id(parse(algo)) {}
    inline Algorithm(Id id) : m_id(id)                     {}
    Algorithm(const rapidjson::Value &value);

    inline bool isCN() const                          { auto f = family(); return f == CN || f == CN_LITE || f == CN_HEAVY || f == CN_PICO; }
    inline bool isEqual(const Algorithm &other) const { return m_id == other.m_id; }
    inline bool isValid() const                       { return m_id != INVALID && family() != UNKNOWN; }
    inline const char *name() const                   { return name(false); }
    inline const char *shortName() const              { return name(true); }
    inline Family family() const                      { return family(m_id); }
    inline Id id() const                              { return m_id; }

    inline bool operator!=(Algorithm::Id id) const        { return m_id != id; }
    inline bool operator!=(const Algorithm &other) const  { return !isEqual(other); }
    inline bool operator==(Algorithm::Id id) const        { return m_id == id; }
    inline bool operator==(const Algorithm &other) const  { return isEqual(other); }
    inline operator Algorithm::Id() const                 { return m_id; }

    rapidjson::Value toJSON() const;
    rapidjson::Value toJSON(rapidjson::Document &doc) const;
    size_t l2() const;
    size_t l3() const;
    uint32_t maxIntensity() const;

    static Family family(Id id);
    static Id parse(const char *name);

private:
    const char *name(bool shortName) const;

    Id m_id = INVALID;
};


using Algorithms = std::vector<Algorithm>;


} /* namespace xmrig */


#endif /* XMRIG_ALGORITHM_H */
