#pragma once
#include <cstdint>

namespace utils {

struct Snowflake {
  union {
    struct {
      std::uint64_t timestamp : 42;
      std::uint64_t instance : 10;
      std::uint64_t sequence : 12;
    };
    std::uint64_t snowflake;
  };

  bool operator==(const Snowflake& other) const {
    return snowflake == other.snowflake;
  }

  std::vector<char> Serialize() {
    std::vector<char> serialized(8);
    ::memcpy(serialized.data(), &snowflake, 8);
    return serialized;
  }
};

Snowflake GenerateID(std::uint8_t instance);

}  // namespace Chattr

namespace std {
template <>
struct hash<utils::Snowflake> {
  std::size_t operator()(const utils::Snowflake& k) const {
    return std::hash<std::uint64_t>{}(k.snowflake);
  }
};
}  // namespace std