// Copyright (c) 2019-2023, The Monero Project
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
// 
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
// 
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#pragma once

#include "string_tools.h"
#include "int-util.h"
#include "cryptonote_basic/difficulty.h"

template<uint64_t hash_target_high, uint64_t hash_target_low, uint64_t difficulty_high, uint64_t difficulty_low>
class test_check_hash
{
public:
  static const size_t loop_count = 100000;

  bool init()
  {
    cryptonote::difficulty_type hash_target = hash_target_high;
    hash_target = (hash_target << 64) | hash_target_low;
    difficulty = difficulty_high;
    difficulty = (difficulty << 64) | difficulty_low;
    boost::multiprecision::uint256_t hash_value =  std::numeric_limits<boost::multiprecision::uint256_t>::max() / hash_target;
    uint64_t val;
    val = (hash_value & 0xffffffffffffffff).convert_to<uint64_t>();
    ((uint64_t*)&hash)[0] = SWAP64LE(val);
    hash_value >>= 64;
    val = (hash_value & 0xffffffffffffffff).convert_to<uint64_t>();
    ((uint64_t*)&hash)[1] = SWAP64LE(val);
    hash_value >>= 64;
    val = (hash_value & 0xffffffffffffffff).convert_to<uint64_t>();
    ((uint64_t*)&hash)[2] = SWAP64LE(val);
    hash_value >>= 64;
    val = (hash_value & 0xffffffffffffffff).convert_to<uint64_t>();
    ((uint64_t*)&hash)[3] = SWAP64LE(val);
    return true;
  }

  bool test()
  {
    cryptonote::check_hash_128(hash, difficulty);
    return true;
  }

private:
  crypto::hash hash;
  cryptonote::difficulty_type difficulty;
};