#pragma once

#include <algorithm>
#include <random>
#include <cstdint>
#include <ctime>

namespace discord_rpc {

struct Backoff {
  int64_t minAmount;
  int64_t maxAmount;
  int64_t current;
  int fails;
  std::mt19937_64 randGenerator;
  std::uniform_real_distribution<> randDistribution;

  double rand01() { return randDistribution(randGenerator); }

  Backoff(int64_t min, int64_t max)
      : minAmount(min), maxAmount(max), current(min), fails(0), randGenerator(static_cast<uint64_t>(time(0))) {
  }

  void reset() {
    fails = 0;
    current = minAmount;
  }

  int64_t nextDelay() {
    ++fails;
    int64_t delay = static_cast<int64_t>(static_cast<double>(current) * 2.0 * rand01());
    current = std::min(current + delay, maxAmount);
    return current;
  }
};

}  // namespace discord_rpc