//
// Created by Kirill Zhukov on 20.04.2025.
//

#ifndef COMMAND_H
#define COMMAND_H

#include <cstdint>
#include <atomic>
#include "utils/hash/Hash128.h"

namespace usub::core
{
    enum class OperationType : uint8_t
    {
        PUT = 0,
        DELETE = 1,
        FIND = 2
    };

    struct alignas(64) Command
    {
        Command()
            : ready(0), op(OperationType::PUT), key(), value_size(0), value()
        {
        }

        Command(const Command& other)
            : ready(other.ready.load(std::memory_order_relaxed)), // копируем ready явно
              op(other.op),
              key(other.key),
              value_size(other.value_size), value()
        {
            std::memcpy(value, other.value, other.value_size);
        }

        Command(Command&& other) noexcept
            : ready(other.ready.load(std::memory_order_relaxed)),
              op(other.op),
              key(other.key),
              value_size(other.value_size), value()
        {
            std::memcpy(value, other.value, other.value_size);
        }

        Command& operator=(const Command& other)
        {
            if (this != &other)
            {
                ready.store(other.ready.load(std::memory_order_relaxed), std::memory_order_relaxed);
                op = other.op;
                key = other.key;
                value_size = other.value_size;
                std::memcpy(value, other.value, other.value_size);
            }
            return *this;
        }

        Command& operator=(Command&& other) noexcept
        {
            if (this != &other)
            {
                ready.store(other.ready.load(std::memory_order_relaxed), std::memory_order_relaxed);
                op = other.op;
                key = other.key;
                value_size = other.value_size;
                std::memcpy(value, other.value, other.value_size);
            }
            return *this;
        }

        std::atomic<uint8_t> ready;
        OperationType op;
        utils::Hash128 key;
        uint32_t value_size;
        char value[1024];
    };
}

#endif // COMMAND_H