/*

* (C) 1999-2007,2018,2020,2026 Jack Lloyd

*

* Botan is released under the Simplified BSD License (see license.txt)

*/

#ifndef BOTAN_ASN1_TIME_TYPE_H_

#define BOTAN_ASN1_TIME_TYPE_H_

#include <botan/asn1_obj.h>

#include <chrono>

namespace Botan {

/**

* Time (GeneralizedTime/UniversalTime)

*/

class BOTAN_PUBLIC_API(2, 0) ASN1_Time final : public ASN1_Object {

   public:

      /// DER encode a ASN1_Time

      void encode_into(DER_Encoder& to) const override;

      // Decode a BER encoded ASN1_Time

      void decode_from(BER_Decoder& from) override;

      /// Return an internal string representation of the time

      std::string to_string() const;

      /// Returns a human friendly string representation of no particular formatting

      std::string readable_string() const;

      /// Return if the time has been set somehow

      bool time_is_set() const;

      ///  Compare this time against another

      int32_t cmp(const ASN1_Time& other) const;

      /// Create an invalid ASN1_Time

      ASN1_Time() = default;

      /// Create a ASN1_Time from a time point

      explicit ASN1_Time(const std::chrono::system_clock::time_point& time);

      /// Create an ASN1_Time from seconds since epoch

      static ASN1_Time from_seconds_since_epoch(uint64_t seconds);

      /// Create an ASN1_Time from string

      BOTAN_FUTURE_EXPLICIT ASN1_Time(std::string_view t_spec);

      /// Create an ASN1_Time from string and a specified tagging (Utc or Generalized)

      ASN1_Time(std::string_view t_spec, ASN1_Type tag);

      /// Returns a STL timepoint object

      std::chrono::system_clock::time_point to_std_timepoint() const;

      /// Return time since epoch

      uint64_t time_since_epoch() const;

   private:

      void set_to(std::string_view t_spec, ASN1_Type type);

      bool passes_sanity_check() const;

      uint32_t m_year = 0;

      uint32_t m_month = 0;

      uint32_t m_day = 0;

      uint32_t m_hour = 0;

      uint32_t m_minute = 0;

      uint32_t m_second = 0;

      ASN1_Type m_tag = ASN1_Type::NoObject;

};

/*

* Comparison Operations

*/

BOTAN_PUBLIC_API(2, 0) bool operator==(const ASN1_Time& x, const ASN1_Time& y);

BOTAN_PUBLIC_API(2, 0) bool operator!=(const ASN1_Time& x, const ASN1_Time& y);

BOTAN_PUBLIC_API(2, 0) bool operator<=(const ASN1_Time& x, const ASN1_Time& y);

BOTAN_PUBLIC_API(2, 0) bool operator>=(const ASN1_Time& x, const ASN1_Time& y);

BOTAN_PUBLIC_API(2, 0) bool operator<(const ASN1_Time& x, const ASN1_Time& y);

BOTAN_PUBLIC_API(2, 0) bool operator>(const ASN1_Time& x, const ASN1_Time& y);

}  // namespace Botan

#endif