// MIT License
//
// Copyright (c) 2025 Advanced Micro Devices, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#pragma once

#include "lib/common/defines.hpp"
#include "lib/common/mpl.hpp"

#include <array>
#include <cstdint>
#include <string>

namespace rocprofiler
{
namespace common
{
// --- SHA-256 Implementation ---
class sha256
{
public:
    sha256();
    explicit sha256(const std::string& data);

    void update(const uint8_t* data, size_t len);
    void update(const std::string& data);

    void                    finalize();
    std::string             hexdigest();
    std::array<uint32_t, 8> rawdigest();

private:
    bool                    m_finalized = false;
    std::array<uint8_t, 64> m_data      = {};
    std::array<uint32_t, 8> m_state     = {};
    uint32_t                m_datalen   = 0;
    uint64_t                m_bitlen    = 0;

    static constexpr std::array<uint32_t, 64> m_k = {
        0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4,
        0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe,
        0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f,
        0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
        0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc,
        0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b,
        0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116,
        0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
        0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7,
        0xc67178f2};

    static uint32_t rotr(uint32_t x, uint32_t n);
    static uint32_t ch(uint32_t x, uint32_t y, uint32_t z);
    static uint32_t maj(uint32_t x, uint32_t y, uint32_t z);
    static uint32_t sig0(uint32_t x);
    static uint32_t sig1(uint32_t x);
    static uint32_t theta0(uint32_t x);
    static uint32_t theta1(uint32_t x);

    void transform();
    void reset();
};
}  // namespace common
}  // namespace rocprofiler