#include <iostream>
#include <string>

using namespace std;


// Helper Strings
string banner1 = "=====================================================";
string banner2 = "============ Welcome to the Dining Hall =============";
string voucherChoice = "Please Choose Your Dining Voucher: \n (1) $10, (2) $ 20, (3) $50, (4) $100 \n";
string voucherBalance = "You've inserted: \n";
string voucherMoreMoney = "Add more funds? (Y/N)";
string voucherFoodMenu = "Please make a selection: \n (P)otato Chip $2.50, (H)am Burger $%.50, (C)hicken Rice , (B)rooklyn Pizza $4.50 \n";
string voucherDrinkMenu = "Select your beverages: \n (A)quaVenna $1.50, (B)epsi $2.00, (C)ool Cola $2.00, (G)atorade $2.25, (N)o Beverage \n";
string insufficientFunds = "Insufficient amount to make selection \n";
string changeProvided = "Enjoy your meals \n";

// Helper Functions
// Return the cost of the voucher food menu
// parameters: voucherFoodMenu is p,h,c or b (upper or lower case)
float getFoodCost(char voucherFoodMenu)
{
    if(voucherFoodMenu == 'P' || voucherFoodMenu == 'p')
        return 1.50;
    else if(voucherFoodMenu == 'B' || voucherFoodMenu == 'b' || voucherFoodMenu == 'C' || voucherFoodMenu == 'c')
        return 2.00;
    else if(voucherFoodMenu == 'G' || voucherFoodMenu == 'g')
        return 2.25;
    else if(voucherFoodMenu == 'N' || voucherFoodMenu == 'n')
        return 0.0;
}

// Return the cost of the voucher drink menu
// parameters: voucherDrinkMenu is a,b,c,g or n (upper or lower case)
float getDrinkCost(char voucherDrinkMenu)
{

    if(voucherDrinkMenu == 'P' || voucherDrinkMenu == 'p')
        return 2.50;
    else if(voucherDrinkMenu == 'H' || voucherDrinkMenu == 'h' || voucherDrinkMenu == 'C' || voucherDrinkMenu == 'c')
        return 5.50;
    else if(voucherDrinkMenu == 'B' || voucherDrinkMenu == 'b')
        return 4.50;
    return 0.0;
}

// Return true if the balance can cover the cost.
// parameters:  balance is the user's balance.
//              cost is the price of the item.
bool hasSufficientFunds(float balance, float cost)
{
    if( balance >= cost )
    {
        return true;
    }

    return false;
}

// function to translate the selected number (1,2,3,4) to a dollar amount ($10, $20, $50, $100).
float receiveMoney(char bill)
{
    float voucherMoneyInsterted = 0;

    // receive money
    if (bill == '1')
        voucherMoneyInsterted = 10.00;
    else if  (bill == '2')
        voucherMoneyInsterted = 20.00;
    else if  (bill == '3')
        voucherMoneyInsterted = 50.00;
    else if  (bill == '4')
        voucherMoneyInsterted = voucherMoneyInsterted + 100.00;
    else {
        std::cout << "Invalid input." << std::endl;
        return 0;
    }
    return voucherMoneyInsterted;
}

// Function to offer more voucherFoodMenu
// Return true if user wants more, otherwise give change.
bool offerMoreVoucherFood()
{
    // ask if user wants to purchase more drinks
    cout << "Add more meals?\n";
    char addMoreVoucherFoodYN;
    cin >> addMoreVoucherFoodYN;

    if (addMoreVoucherFoodYN == 'N' || addMoreVoucherFoodYN == 'n')
        return false;
    return true;
}

// Function to offer more voucherDrinkMenu
// Return true if user wants more, otherwise give change.
bool offerMoreVoucherDrinks()
{
    // ask if user wants to purchase more drinks
    cout << "Add more drinks?\n";
    char addMoreVoucherDrinksYN;
    cin >> addMoreVoucherDrinksYN;

    if (addMoreVoucherDrinksYN == 'N' || addMoreVoucherDrinksYN == 'n')
        return false;
    return true;
}

// Variables
bool done = false;
char bill;
char voucherFoodSelected;
float voucherMoneyInsterted (0);
float voucherTotalMoney (0);


int main()
{

//banner
cout<< "=====================================================" << endl;
cout<< "============ Welcome to the Dining Hall =============" << endl;
cout<< "=====================================================" << endl;

        //start
        while (!done){

        // Accept Payment
        bool addingMoney = true;
        while (addingMoney)
        {
            char moreMoneyYN;

        //request money
        cout<< voucherChoice << endl;
            char bill;
            cin >> bill;
         // based on input, get the monetary value
            voucherMoneyInsterted = receiveMoney(bill);

        //tell use how much money was inserted
        cout << voucherBalance << voucherMoneyInsterted << endl;

        //ask for more money

        cout << "Add more funds? (Y/N)\n";
            char addingMoneyYN;
            cin >> addingMoneyYN;

            if(addingMoneyYN == 'N' || addingMoneyYN == 'n')
            {
        // if the user did not input enough for cheapest meal quit.
            if( !hasSufficientFunds(voucherTotalMoney, 1.5) )
            {
                    cout << insufficientFunds << endl;
                    return 0;
            }

                addingMoney = false;
        }
    }

        //tell user the balance
        cout << voucherTotalMoney << endl;

            bool orderingVoucherFood = true;
            while (orderingVoucherFood)
        {
        //accept selection
        char voucherFoodMenu;
        cout << voucherFoodMenu << endl;
        cin >> voucherFoodMenu;
        cout << "Meal selected: " << voucherFoodMenu << endl;

        //check if balance is sufficient to cover purchase of voucher food
        float voucherFoodCost = getFoodCost(voucherFoodMenu);
            bool enoughFunds = hasSufficientFunds(voucherTotalMoney, voucherFoodCost);

            if( enoughFunds )
            {
                // Vend the drink and subtract payment
                // voucherTotalMoney = voucherTotalMoney - drinkCost;
                voucherTotalMoney -= voucherFoodCost;
                cout << "Coins/Bills: " << voucherTotalMoney << endl;

        //if enough funds for voucher food do this
        if( !hasSufficientFunds(voucherTotalMoney, 1.5))
                {
                    cout << voucherTotalMoney << endl;
                    return 0;
                }
            }
            else
            {
                cout << "Coins/Bills: " << voucherTotalMoney - voucherFoodCost << endl;
                cout << insufficientFunds << "\nInsufficient amount to make selection\n";
                cout << "Coins/Bills: " << voucherTotalMoney << endl;
            }

            if(!offerMoreVoucherFood())
            {
                cout << voucherTotalMoney << endl;
                done = true;
            }
        }

        done = true;
    }

    cout << "Bye!\n";
}