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

#include "Wal.h"

namespace usub::utils
{
    WAL::WAL(const std::string& filename)
    {
        this->out.open(filename, std::ios::binary | std::ios::app);
        if (!this->out.is_open()) throw std::runtime_error("Failed to open WAL");
    }

    void WAL::write_put(const Hash128& key, const std::string& value)
    {
        uint8_t op = 0;
        uint32_t value_len = value.size();
        this->out.write(reinterpret_cast<const char*>(&op), sizeof(op));
        this->out.write(reinterpret_cast<const char*>(&key), sizeof(key));
        this->out.write(reinterpret_cast<const char*>(&value_len), sizeof(value_len));
        this->out.write(value.data(), value_len);
        this->out.flush();
    }

    void WAL::write_delete(const Hash128& key)
    {
        uint8_t op = 1;
        this->out.write(reinterpret_cast<const char*>(&op), sizeof(op));
        this->out.write(reinterpret_cast<const char*>(&key), sizeof(key));
        this->out.flush();
    }

    void WAL::close()
    {
        this->out.close();
    }
} // utils
// usub