#include "rate_limiter.hpp"
#include <chrono>
namespace svapi {
RateLimiter::RateLimiter()
    : now_([]{ return std::chrono::duration_cast<std::chrono::seconds>(
          std::chrono::system_clock::now().time_since_epoch()).count(); }) {}
bool RateLimiter::allow(const std::string& keyId, uint32_t limitPerMin) {
    if (limitPerMin == 0) return true;
    std::lock_guard<std::mutex> lk(mu_);
    int64_t minute = now_() / 60;
    auto& w = windows_[keyId];
    if (w.minute != minute) { w.minute = minute; w.count = 0; }
    if (w.count >= limitPerMin) return false;
    ++w.count;
    return true;
}
void RateLimiter::setClockForTesting(std::function<int64_t()> fn) {
    std::lock_guard<std::mutex> lk(mu_); now_ = std::move(fn);
}
RateLimiter& rateLimiter() { static RateLimiter inst; return inst; }
}