#include <iostream>
#include <string>
#include <windows.h>

using namespace std;

const int numItems = 6;
const string shopItemNames[numItems] = { "Boots", "Swords", "Helmets", "Kittens", "Poleaxes", "Leggings" };
void printShop();
void printInventory(int playerInventory[numItems]);
void stringUpper(string &s);
bool buyItems(int playerInventory[numItems]);
int main()
{
	int playerInventory[numItems] = {5,3,6,1,0,0};

	bool isDone = false;
	cout << "***Welcome to the Item Shop!***" << endl<<endl;

	while (isDone == false){
		system("cls");
		printShop();
		printInventory(playerInventory);
		isDone = buyItems(playerInventory);
		cout << "\n\n\n";
		printInventory(playerInventory);
		cout << "\n\n\n";

	}

	system("PAUSE");
	return 0;
}
void printInventory(int playerInventory[numItems])
{
	cout << "                       Your inventory is:" << endl<<endl;
	for (int i = 0; i < numItems; i++){
		if (playerInventory[i]>0){
			cout << "                          " << playerInventory[i] <<" x " << shopItemNames[i] << endl << endl;
		}
	}

}


void printShop()
{
	cout << "Here's what we have in stock today..." << endl << endl;
	for (int i = 0; i < numItems; i++){
		cout << i+1 << ": "<< shopItemNames[i] << endl;
		}
	}

bool buyItems(int playerInventory[numItems])

{
	int inventoryCheck;
	string inputInitial;
	int inputBuy;
	int inputBuyMultiple;
	int inputSell;
	int inputSellMultiple;

	for (int i = 0; i < 1; i){
		cout << "\n\nWould you like to buy or sell an item? (B or S) : ";
		cin >> inputInitial;
		stringUpper(inputInitial);
		if (inputInitial == "B"){
			cout << "\n\nWhat would you like to buy? Enter a number (1 - " << numItems << ") or - 1 to quit:";
			cin >> inputBuy;
			if (inputBuy == -1){
				return true;

			}
			if (inputBuy - 1 < 0 || inputBuy - 1 >= numItems) {
				cout << "Not a valid entry!" << endl;
				cout << "\n\n\n";
				return false;
			}
			cout << "\n\nHow many would you like? Enter a number: ";
			cin >>inputBuyMultiple;
			for (int l = 0; l < inputBuyMultiple; l++){
				playerInventory[inputBuy - 1]++; //adds to inventory
			}
			return false;
		}
		if (inputInitial == "S"){
			cout << "\n\nWhat would you like to Sell? Enter a number between 1 and " << numItems << " or enter - 1 to quit:";
			cin >> inputSell;
			if (inputSell <= numItems){

				inventoryCheck = playerInventory[inputSell - 1];
				if (inventoryCheck >= 1){
					if (inputSell == -1){
						return true;

					}
					if (inputSell - 1 < 0 || inputSell - 1 >= numItems) {
						cout << "\n\nNot a valid entry!" << endl;
						cout << "\n\n\n";
						return false;
					}
					if (inventoryCheck == 1) {
						playerInventory[inputSell - 1]--; //subs from inventory
						return false;
					}
					if (inventoryCheck >= 1) {
						cout << "\n\n\n                       You have " << inventoryCheck << " " << shopItemNames[i] << ". \n\n\nHow many would you like to sell? Enter a number between 1 and " << inventoryCheck << ": ";
						cin >> inputSellMultiple;
						for (int k = 0; k < inputSellMultiple; k++){

							playerInventory[inputSell - 1]--; //subs from inventory
						}
							return false;
					}
					Sleep(2300);
					return false;
				}


			}
			}


		cout << "\n\n\n\n\n                         Not a valid entry!\n\n\n\n\n" << endl;
		Sleep(2300);
		return false;

	}
	Sleep(2300);
	return false;
}
void stringUpper(string &s)
{
	for (unsigned int l = 0; l < s.length(); l++)
	{
		s[l] = toupper(s[l]);
	}
}