// BlankConsoleLab.cpp : This file contains the 'main' function. Program execution begins and ends there.
// 
// Name: Taylor Rogers
// Assignment: Lab 2
// 



#include <iostream>
#include <math.h>
#include <iomanip>


using std::cout;
using std::cin;
using std::endl;
using std::setw;


const int Fmax = 121;
signed const int Fmin = -80;
const int Cmax = 49.5;
signed const int Cmin = -62;
const int Wmax = 231;
const int Wmin = 0;

char Tunit{};
float TvalF{};
float TvalC{};
int Wspeed{};
float Wchill{};


// Converts Fahrenheit to Celsius
float FtoCfunc(float FtoCval)
{
    FtoCval = 0;
    FtoCval = (TvalF - 32) * (5.0f / 9.0f);
    TvalC = FtoCval;
    return TvalC;
}


// Converts Celsius to Fahrenheit
float CtoFfunc(float CtoFval)
{
    CtoFval = 0;
    CtoFval = (9.0f / 5.0f) * TvalC + 32;
    TvalF = CtoFval;
    return TvalF;
}


// Converts Windspeed and Temp to Winchill
float Wchfunc(float& Wchcalc)
{
    Wchcalc = 0;
    Wchcalc = 35.74f + .6215f * TvalF - 35.75f * (pow(Wspeed, 0.16f)) + 0.4275f * TvalF * (pow(Wspeed, 0.16f));
    Wchill = Wchcalc;
    return Wchill;
}


int main()
{
    char continu = 'Y';

    while (continu == 'Y')
    {

        // Temp unit selection
        cout << "Please enter F for Fahrenheit or C for Celsius: ";
        cin >> Tunit;
        cout << endl;


        // Temp input in F
        if (Tunit == 70 || Tunit == 102)
        {

            cout << "Please enter temperature between " << Fmin << " and " << Fmax << " degrees F: ";
            cin >> TvalF;

            cout << endl;

            while (TvalF < Fmin || TvalF > Fmax)
            {
                cout << "Please enter a value between " << Fmin << " and " << Fmax << ": ";
                cin >> TvalF;
            }

            FtoCfunc(TvalC);
        }


        // Temp input in C
        else if (Tunit == 67 || Tunit == 99)
        {

            cout << "Please enter temperature between " << Cmin << " and " << Cmax << " degrees C: ";
            cin >> TvalC;

            cout << endl;

            while (TvalC < Cmin || TvalC > Cmax)
            {
                cout << "Please enter a value between " << Cmin << " and " << Cmax << ": ";
                cin >> TvalC;
            }

            CtoFfunc(TvalF);
        }


        else
        {
            cout << "Invalid unit" << endl;
            return 0;
        }

        //Windspeed
        cout << "Please enter a windpeed value between 0 and 231 in Miles Per Hour: ";

        cin >> Wspeed;

        cout << endl;

        while (Wspeed < Wmin || Wspeed > Wmax)
        {
            cout << "Please enter a value between " << Wmin << " and " << Wmax << ": ";
            cin >> Wspeed;
        }


        Wchfunc(Wchill);

        cout << endl;

        cout << setw(25) << "Temp (C)" << setw(25) << "Temp (F)" << setw(25) << "Wind Speed (MPH)" << setw(25) << "Wind Chill" << endl;

        cout << setw(25) << TvalC << setw(25) << TvalF << setw(25) << Wspeed << setw(25) << Wchill << endl;

        cout << endl;

        cout << "Want to do again? Type \'Y\': ";
        cin >> continu;
    }
}