#pragma once

#include <chrono>
#include <utility>

struct RateLimit {
    virtual ~RateLimit();
    auto virtual query(size_t want_to_send) -> std::pair<std::chrono::milliseconds, size_t> = 0;
};

struct Rfc1459RateLimit final : RateLimit
{
    using clock = std::chrono::steady_clock;

    std::chrono::milliseconds cost_ {2'000};
    std::chrono::milliseconds allowance_ {10'000};
    clock::time_point horizon_{};

    auto query(size_t want_to_send) -> std::pair<std::chrono::milliseconds, size_t> override;
};