/******************************************************************************
 * This program tests the Temperature class.
 * 
 * Copyright © 2021 Richard Lesh.  All rights reserved.
 *****************************************************************************/

#undef NDEBUG

#include <fmt/format.h>
#include <iostream>
#include <memory>
#include <string>

using namespace std;

class Temperature {
private:
// Internal representation for Temperature is in Celsius
    double temperature_in_celsius = 0.0;
    static constexpr double CELSIUS_TO_KELVIN = 273.15;
    static constexpr double FAHRENHEIT_TO_RANKINE = 459.67;
    static constexpr double KELVIN_TO_RANKINE = 1.8;

public:
// Constructor
    Temperature() noexcept {
        temperature_in_celsius = -CELSIUS_TO_KELVIN;
    }

// Celsius getter
    double get_celsius() noexcept {
        return temperature_in_celsius;
    }

// Celsius setter
    void set_celsius(double temperature_in_celsius) noexcept {
        this->temperature_in_celsius = temperature_in_celsius;
    }

// Kelvin getter
    double get_kelvin() noexcept {
        return get_celsius() + CELSIUS_TO_KELVIN;
    }

// Kelvin setter
    void set_kelvin(double k) noexcept {
        set_celsius(k - Temperature::CELSIUS_TO_KELVIN);
    }

// Rankine getter
    double get_rankine() noexcept {
        return get_kelvin() * Temperature::KELVIN_TO_RANKINE;
    }

// Rankine setter
    void set_rankine(double r) noexcept {
        set_kelvin(r / KELVIN_TO_RANKINE);
    }

// Fahrenheit getter
    double get_fahrenheit() noexcept {
        return this->get_rankine() - FAHRENHEIT_TO_RANKINE;
    }

// Fahrenheit setter
    void set_fahrenheit(double f) noexcept {
        set_rankine(f + Temperature::FAHRENHEIT_TO_RANKINE);
    }
};

int main(int argc, char **argv) {
    shared_ptr<Temperature> t(new Temperature());
    cout << fmt::format("Celcius: {0:.2f}", t->get_celsius()) << endl;
    cout << fmt::format("Kelvin: {0:.2f}", t->get_kelvin()) << endl;
    cout << fmt::format("Fahrenheit: {0:.2f}", t->get_fahrenheit()) << endl;
    cout << fmt::format("Rankine: {0:.2f}", t->get_rankine()) << endl;
    cout << endl;

    t->set_celsius(100.);
    cout << fmt::format("Celcius: {0:.2f}", t->get_celsius()) << endl;
    cout << fmt::format("Kelvin: {0:.2f}", t->get_kelvin()) << endl;
    cout << fmt::format("Fahrenheit: {0:.2f}", t->get_fahrenheit()) << endl;
    cout << fmt::format("Rankine: {0:.2f}", t->get_rankine()) << endl;
    cout << endl;

    t->set_fahrenheit(-40.);
    cout << fmt::format("Celcius: {0:.2f}", t->get_celsius()) << endl;
    cout << fmt::format("Kelvin: {0:.2f}", t->get_kelvin()) << endl;
    cout << fmt::format("Fahrenheit: {0:.2f}", t->get_fahrenheit()) << endl;
    cout << fmt::format("Rankine: {0:.2f}", t->get_rankine()) << endl;
    cout << endl;

    t->set_kelvin(373.15);
    cout << fmt::format("Celcius: {0:.2f}", t->get_celsius()) << endl;
    cout << fmt::format("Kelvin: {0:.2f}", t->get_kelvin()) << endl;
    cout << fmt::format("Fahrenheit: {0:.2f}", t->get_fahrenheit()) << endl;
    cout << fmt::format("Rankine: {0:.2f}", t->get_rankine()) << endl;
    cout << endl;

    t->set_rankine(671.67);
    cout << fmt::format("Celcius: {0:.2f}", t->get_celsius()) << endl;
    cout << fmt::format("Kelvin: {0:.2f}", t->get_kelvin()) << endl;
    cout << fmt::format("Fahrenheit: {0:.2f}", t->get_fahrenheit()) << endl;
    cout << fmt::format("Rankine: {0:.2f}", t->get_rankine()) << endl;
    cout << endl;
    return 0;
}