// Program Name: A2P2.cpp
// Programmer Name: Alex Proulx
// Overview: This is a menu for Vitto's Vending.
// Date: 2/8/2016

#include <iostream>
#include <string>
#include <iomanip>
#include <cstdlib>
#include <windows.h>
#include <conio.h>
#include <process.h>

using namespace std;

void gotoxy(int x, int y)
{
	COORD coord;
	coord.X = x;  //column coordinate
	coord.Y = y;	//row coordinate
	SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}
void clrscr(int x, int y)
{
	COORD                       coordScreen = { x, y };
	DWORD                       cCharsWritten;
	CONSOLE_SCREEN_BUFFER_INFO  csbi;
	DWORD                       dwConSize;
	HANDLE                      hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
	GetConsoleScreenBufferInfo(hConsole, &csbi);
	dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
	FillConsoleOutputCharacter(hConsole, TEXT(' '),
		dwConSize, coordScreen, &cCharsWritten);
	GetConsoleScreenBufferInfo(hConsole, &csbi);
	FillConsoleOutputAttribute(hConsole, csbi.wAttributes,
		dwConSize, coordScreen, &cCharsWritten);
	SetConsoleCursorPosition(hConsole, coordScreen);
}
void greetings()
{
	clrscr(0, 0);
	gotoxy(30, 10);
	cout << "Welcome to Vitto's!" << endl;
	gotoxy(30, 12);
	cout << "Mangiare, Mangiare!" << endl;
	gotoxy(30, 25);
	cout << "Press enter to continue...";
	_getch();
	clrscr(0, 0);
}

void thanks_for_shopping(int total_purchases)
{
	clrscr(0, 0);
	gotoxy(25, 10);
	cout << "You have purchased" << total_purchases << "number of items.";
	gotoxy(25, 12);
	cout << "Thank You for shopping at Vitto's!";
}

void update_vending(string choice[8], string item_name[8],
	string price[7], int qty[7], string headers[4], int& header_position,
	int& choice_position, int& item_position, int& price_position, int& qty_position, int& total_purchases)
{
	gotoxy(30, 1);
	cout << "VITTO'S VENDETTA VENDING" << endl;

	for (int i = 0; i < 4; i++)
	{
		gotoxy(header_position, 3);
		cout << headers[i] << endl;

		if (header_position == 8)
		{
			header_position = 18;
		}

		else if (header_position == 18)
		{
			header_position = 31;
		}

		else if (header_position == 18)
		{
			header_position = 40;
		}
	}

	for (int i = 0; i < 8; i++)
	{
		gotoxy(8, choice_position);
		cout << choice[i] << endl;
		choice_position++;
	}

	for (int i = 0; i < 8; i++)
	{
		gotoxy(18, item_position);
		cout << item_name[i] << endl;
		item_position++;
	}

	for (int i = 0; i < 7; i++)
	{
		gotoxy(31, price_position);
		cout << price[i] << endl;
		price_position++;
	}

	for (int i = 0; i < 8; i++)
	{
		gotoxy(40, qty_position);
		cout << qty[i] << endl;
	}

	int finished_purchases = 1;

	while (finished_purchases == 1)
	{
		char item_choice = _getch();
		item_choice = tolower(item_choice);
		int item_number = item_choice;

		//Quantity
		switch (item_choice)
		{
		case '1':
		case '2':
		case '3':
		case '4':
		case '5':
		case '6':
		case '7':

			if (qty[item_number - 49] > 0)
			{
				qty[item_number - 49]--;
				gotoxy(40, 5 + item_number - 49);
				cout << qty[item_number - 49];
				total_purchases++;
			}

			if (qty[item_number - 49] == 0)
			{
				gotoxy(40, 5 + item_number - 49);
				cout << "OUT";
			}
			break;

		case 'e':
			finished_purchases = 0;
			thanks_for_shopping(total_purchases);
		}
	}
}

int main()
{
	char repeat = 'y';
	while (repeat == 'y')
	{
		int header_position = 8;
		int choice_position = 5;
		int item_position = 5;
		int price_position = 5;
		int qty_position = 5;
		int qty[7] = { 5, 5, 5, 5, 5, 5, 5 };
		int total_purchases = 0;
		string choice[8] = { "1.", "2.", "3.", "4.", "5.", "6.", "7.", "E." };
		string item_name[8] = { "Soprano Soup", "Godfather Pasta", "Gotti Gum", "Capone Crisps", "Gambino Pie", "Luciano Lunch", "Mafia Muffin", "No More Purchases" };
		string price[7] = { "4.75", "5.85", "2.50", "3.00", "6.75", "8.50", "1.75" };
		string headers[4] = { "CHOICE", "ITEM NAME", "PRICE", "QTY" };

		//Function Call
		greetings();
		update_vending(choice, item_name, price, qty, headers, header_position, choice_position, item_position, price_position, qty_position, total_purchases);

		//Restart Application
		gotoxy(25, 10);
		cout << "Would you like to order more food? (y/n): ";
		cin >> repeat;
	}
	cin.get();
	return 0;
}