#pragma once

#include <list>
#include <ostream>

#include <cstdint>

class number {
public:
    number() = default;

    /**
     * \brief Return a hexadecimal string representation of this number.
     */
    std::string to_hex_string() const;

    /**
     * \brief Return a decimal string representation of this number.
     */
    std::string to_dec_string() const;

    /**
     * \brief Return the result of the addition of a number and this number.
     *
     * \param n The number to add to this number.
     */
    number operator+(const number &n) const;

    /**
     * \brief Tells whether the number passed as parameter is strictly less
     * than this number.
     *
     * \param n The number to compare with this number.
     */
    bool operator<(const number &n) const;

    /**
     * \brief Tells whether the number passed as parameter is strictly greater
     * than this number.
     *
     * \param n The number to compare with this number.
     */
    bool operator>(const number &n) const;

    /**
     * \brief Tells whether the number passed as parameter is less than or
     * equal to this number.
     *
     * \param n The number to compare with this number.
     */
    bool operator<=(const number &n) const;

    /**
     * \brief Tells whether the number passed as parameter is greater than or
     * equal to this number.
     *
     * \param n The number to compare with this number.
     */
    bool operator>=(const number &n) const;

    /**
     * \brief Tells whether the number passed as parameter is equal to this
     * number.
     *
     * \param n The number to compare with this number.
     */
    bool operator==(const number &n) const;

    /**
     * \brief Tells whether the number passed as parameter is not equal to this
     * number.
     *
     * \param n The number to compare with this number.
     */
    bool operator!=(const number &n) const;

private:
     /* First item is the least significant. */
    std::list<std::uint64_t> _operands;
};

std::ostream &operator<<(std::ostream &, const number &);