// This will simulate a music buying service with a price per song after a determined number of free songs
// Switch Case Lab
// Programmer: Noah Spahn
// Last modified: 2/20/18 2:45pm
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;

int main()
{
	char packageChoice;
	double const
		PACKAGE_A_COST = 4.99,
		PACKAGE_B_COST = 9.99,
		PACKAGE_C_COST = 14.99,
		ADDITIONAL_SONG_A = .99,
		ADDITIONAL_SONG_B = .59,
		ADDITIONAL_SONG_C = .29,
		FREESONGS_A = 10,
		FREESONGS_B = 20,
		FREESONGS_C = 30,
		TAX = .06;
	double total, taxTotal, fSongs, package, eaSong, amountOfSongs, totalDueTaxed;
	system("color 8F");

	cout << "\n                          Switch Case GROUP Lab"
		<< "\n                           Online music store\n"
		<< "                  also needs nested if ... else statements\n"
		<< "                        and the conditional operator\n"
		<< "                and use of \"continue\" in one place ONLY\n"
		<< "                              by N. Spahn\n\n\n";



	while (true)
	{
	LOOP:
		cout << "Here are the options for packages offered in our store:\n" << "  Package A: Monthly fee $ " << PACKAGE_A_COST << ". " << FREESONGS_A << " free songs and " << ADDITIONAL_SONG_A << " per song after that." << "\n  Package B: Monthly fee $ " << PACKAGE_B_COST << ".  " << FREESONGS_B << " free songs and " << ADDITIONAL_SONG_B << " per song after that." << "\n  Package C: Monthly fee $ " << PACKAGE_C_COST << ". " << FREESONGS_C << " free songs and " << ADDITIONAL_SONG_C << " per song after that." << "\n\nPlease select the package name that you have? ";
		cin >> packageChoice;
		switch (packageChoice)
		{
		case 'a':
		case 'A':package = PACKAGE_A_COST, eaSong = ADDITIONAL_SONG_A, fSongs = FREESONGS_A;
			break;
		case 'b':
		case 'B':package = PACKAGE_B_COST, eaSong = ADDITIONAL_SONG_B, fSongs = FREESONGS_B;
			break;
		case 'c':
		case 'C':package = PACKAGE_C_COST, eaSong = ADDITIONAL_SONG_C, fSongs = FREESONGS_C;
			break;
		default: cout << "\t     *** Sorry we do not offer that packet. \n" << endl << endl;
			system("pause");
			continue;

		}
		cout << "How many songs did you download this month? ";
		cin >> amountOfSongs;
		cin.ignore(100, '\n');

		if (abs(floor(amountOfSongs)) != amountOfSongs)
		{
			cout << "\n\t\t*** Your number of songs needs to be a whole number!\n";
			cout << "\n\t\t**************************************************************\t\t\n\n";
			goto LOOP;
		}
		if (amountOfSongs <= -1)
		{
			cout << "\n\n\t\t *** You can not have negative number of songs!\n\n";
			cout << "\n\t\t**************************************************************\t\t\n\n";
			goto LOOP;

		}
		if (amountOfSongs > fSongs) {
			total = (amountOfSongs - fSongs) * eaSong + package;
			taxTotal = TAX * total;
			totalDueTaxed = taxTotal + total;


			cout << "\nYour total bill for this month is $" << package << " + " << setprecision(3) << taxTotal << " (for tax) = $" << setprecision(4) << totalDueTaxed << " \n\n";
			cout << "\nYou have $ " << (amountOfSongs - fSongs)* eaSong << " extra charges for having " << amountOfSongs - fSongs << " more songs than your monthly limit of "<< fSongs << " free songs.\n";
			cout << "\n\t\t**************************************************************\t\t\n\n";

		}
		else {

			total = (amountOfSongs - fSongs) * eaSong + package;
			taxTotal = total * TAX;
			totalDueTaxed = taxTotal + total;
			cout << "\nYour total bill for this month is $" << package << " + " << taxTotal << " (for tax) = $" << totalDueTaxed << " \n\n";
			cout << "\n\t\t**************************************************************\t\t\n\n";
		}
		system("pause");
		goto LOOP;
	}

}

// Have Fun!