#pragma once

#include <cstdint>
#include <iostream>
#include <string>

class Time_hms;

// Insert a time into an output stream.
std::ostream &operator<<( std::ostream   &out,
                          Time_hms const &time );

class Time_hms {
  public:
    // Construct a non-negative time.
    Time_hms( std::uint32_t hours,
              unsigned int  minutes,
              unsigned int  seconds );

    // Return if the time is negative, and
    // the hour, minute, and second components.
    bool          negative() const;
    std::uint32_t hours()    const;
    std::uint8_t  minutes()  const;
    std::uint8_t  seconds()  const;

    // Comparison of times
    bool operator==( Time_hms const &other ) const;
    bool operator!=( Time_hms const &other ) const;
    bool operator< ( Time_hms const &other ) const;
    bool operator<=( Time_hms const &other ) const;
    bool operator>=( Time_hms const &other ) const;
    bool operator> ( Time_hms const &other ) const;

    // Return this time or its additive inverse.
    Time_hms operator+() const;
    Time_hms operator-() const;

    // Add or subtract another time.
    Time_hms operator+( Time_hms const &other ) const;
    Time_hms operator-( Time_hms const &other ) const;

    // Add or subtract another time from this time.
    Time_hms &operator+=( Time_hms const &other );
    Time_hms &operator-=( Time_hms const &other );

    // Add or subtract a second from this time.
    Time_hms &operator++();
    Time_hms  operator++( int );
    Time_hms &operator--();
    Time_hms  operator--( int );

    // Return a string representation of this time.
    std::string to_string() const;

  private:
    std::uint32_t hours_;
    std::uint8_t  minutes_;
    std::uint8_t  seconds_;
    bool          is_negative_;

    // Construct a time from the components
    Time_hms( std::uint32_t hours,
              std::uint8_t  minutes,
              std::uint8_t  seconds,
	      bool          is_negative );
};