Vendor.java

import java.text.DecimalFormat;
import java.util.Scanner;

public class Vendor { 

    private VendingItem items[][];
    private Cart cart;
    private double magicNumber;

    public Vendor(int width, int height){
        items = new VendingItem[width][height];
        cart = new Cart();
        magicNumber = generateMagicNumber();
        addItems();
    }

    public static void main(String[] args){
        Vendor myVendor = new Vendor(4, 5);
        myVendor.displayVendor();
        myVendor.printInstructions();
        myVendor.addOrCheckout();
    }

    public void printInstructions(){
        System.out.println("\nWelcome to Magic Vendor!");
        System.out.println("\nYour magic number for this round is: ✨$" + formatPrice(magicNumber) + "✨. You're in " + cart.getState() + 
            ", so your tax rate is " + cart.getState().getTaxRate() + "%. In order to win the game, you must add up items in your cart " + 
            "and aim to get the after-tax total as close to this magic number as possible. But be careful, you won't be able to see the cart total" +
            " until the very end, so choose wisely!");
        System.out.println("Achieve a total within $0.20 of the magic number to win your items for free! Good luck 🙂\n");
    }

    public void addItems(){
        items[0][0] = new VendingItem(3, "🥑", "Avocado", 2.50);
        items[0][1] = new VendingItem(3, "🌮", "Taco", 3.70);
        items[0][2] = new VendingItem(3, "🍇", "Grapes", 2.50);
        items[0][3] = new VendingItem(2, "🍏", "G-apple", 1.20);
        items[0][4] = new VendingItem(4, "🥨", "Pretzel", 3.10);
        items[1][0] = new VendingItem(1, "🍎", "R-apple", 1.10);
        items[1][1] = new VendingItem(1, "🍑", "Peach", 1.90);
        items[1][2] = new VendingItem(1, "🍒", "Cherry", 3.35);
        items[1][3] = new VendingItem(3, "🍆", "Eggplan", 2.65);
        items[1][4] = new VendingItem(1, "🥖", "Baguett", 2.95);
        items[2][0] = new VendingItem(2, "🧀", "Cheddar", 2.60);
        items[2][1] = new VendingItem(1, "🍔", "Burger", 4.20);
        items[2][2] = new VendingItem(1, "🍗", "Turkey", 3.35);
        items[2][3] = new VendingItem(3, "🍕", "Pizza", 2.45);
        items[2][4] = new VendingItem(1, "🥞", "Pancake", 1.05);
        items[3][0] = new VendingItem(1, "🥐", "Croiss", 1.10);
        items[3][1] = new VendingItem(1, "🥪", "Sandw", 5.20);
        items[3][2] = new VendingItem(1, "🧆", "Falafel", 2.85);
        items[3][3] = new VendingItem(3, "🍬", "Candy", 0.65);
        items[3][4] = new VendingItem(1, "🍩", "Donut", 1.15);
    }

    public Cart getCart() {
        return cart;
    }

    public VendingItem getItemAt(int x, int y){
        return items[x][y];
    }

    public VendingItem getItemNamed(String name){
        for(int i = 0; i <items.length; i++){
            for(int j = 0; j < items[0].length; j++){
                if(items[i][j].getName().toLowerCase().equals(name.toLowerCase())){
                    return items[i][j];
                }
            }
        }
        return null;
    }

    public void addItem(VendingItem item, int x, int y){
        items[x][y] = item;
    }

    public int getNumItemsAt(int x, int y){
        return items[x][y].getQuantity();
    }

    public double getMagicNumber(){
        return this.magicNumber;
    }

    public void displayVendor(){
        System.out.println("\t1 \t2 \t3 \t4 \t5");
        System.out.println("-------------------------------------------");
        for(int i = 0; i<items.length; i++){
            printLine(i);
        }
        System.out.println("Magic number: " + formatPrice(magicNumber) + "\n");
    }
 
    enum lineLetters{A, B, C, D, E};
    
    public void printLine(int line){
        System.out.print(lineLetters.values()[line]);
        for(int y = 0; y < items[line].length; y++){
            System.out.print("\t" + items[line][y].getEmoji());
        }
        System.out.println();
        for(int y = 0; y < items[line].length; y++){
            System.out.print("\t" + formatPrice(items[line][y].getPrice()));
        }
        System.out.println();
    }

    /** 
     * @return randomly generated magic number between 5-15
    */
    public static double generateMagicNumber(){
        double number = (Math.random()*10)+5;
        if(number<0){
            number = Math.abs(number);
        }
        else if(number<=0 && number<=2){
            number=3;
        }
        return number;
        
    }

    public void checkout(){
        Double total = cart.calculateSubtotal() * (1.0 + cart.getState().getTaxRate() / 100.0);
        cart.viewCart(true);
        System.out.println("Subtotal: $" + formatPrice(cart.calculateSubtotal()));
        System.out.println("Tax: " + cart.getState().getTaxRate() + "% = $" + formatPrice(total - cart.calculateSubtotal()) );
        System.out.println("Your total is: $"+ formatPrice(total) + " and your magic number was: $" + formatPrice(magicNumber));
        if(withinMagicRange(magicNumber, total)){
            System.out.println("Congratulations! 🥳 You stayed within the magic range. Enjoy your items for free!");
        }
        else{
            System.out.println("Sorry 😔 Your total was outside the magic range. Looks like you'll have to pay for those items!");
        }
        System.out.println("Thanks for using magic vendor!\n");
    }

    public boolean withinMagicRange(double magicNumber, double total){
        double rangeHigh= magicNumber+0.20;
        double rangeLow= magicNumber-0.20;
        if (total>=rangeLow && total<=rangeHigh){
            return true; 
        }
        else{
            return false;
        }
    }

    public static String formatPrice(Double price){
        DecimalFormat df = new DecimalFormat("0.00");
        return df.format(price);
    }

    /**
     * repeatedly prompts user for input, exits while loop when user checks out
     */
    public void addOrCheckout(){
        Scanner input = new Scanner(System.in);
        while(true){
            System.out.println("Options: enter 'add d3' to add item d3 to cart (or any item), 'cart' to view cart, 'show' to display the vending machine. 'checkout' to buy items in cart & quit");
            String response = input.nextLine().toLowerCase();
            //checks to see if add command is correct format
            if(response.matches("add\\s.*")){
                handleAdd(response);
            }
            else if(response.matches("remove\\s.*")){
                handleRemove(response);
            }
            else if(response.equals("cart")){
                cart.viewCart(false);
            }
            else if(response.equals("checkout")){
                checkout();
                break;
            }
            else if(response.equals("show")){
                displayVendor();
            }
            else{
                System.out.println("Invalid Input");
            }
        }
        input.close();
    }

    /** 
     * @param response passed item in form of a5, b2, etc.
     */
    public void handleAdd(String response){
        String itemToBuy = " ";
        if(response.split("\\s").length > 1){
            itemToBuy = response.split("\\s")[1];
        }
        if(buyItem(itemToBuy)){
            System.out.println("Added item " + itemToBuy + " to cart.");
        }
        else {
            System.out.println("Valid items are a1 - d5. For example, enter 'add c4' to add c4 to cart");
        }
    }

    /**
     * @param response passed item name as it appears in Cart.viewCart()
     */
    public void handleRemove(String response){
        String itemToRemove = " ";
        if(response.split("\\s").length > 1){
            itemToRemove = response.split("\\s")[1];
        }
        if(cart.removeItem(getItemNamed(itemToRemove))){
            System.out.println("Removed 1 " + itemToRemove + " from cart.");
        }
        else{
            System.out.println("Whoops! We couldn't find that item in your cart. Please enter the item name as it appears in the cart");
        }
    }

    /**
     * filters user input and calls Cart.addItem()
     * @param input user-input string in format of "a5", "b2", etc.
     * @return false if user input invalid
     */
    public boolean buyItem(String input){
        String filteredInput = input.toUpperCase();
        if(!filteredInput.matches("[ABCD][12345]")){
            return false;
        }
        char rowAsChar = filteredInput.charAt(0);
        int row = (int) rowAsChar - 65;
        int col = filteredInput.charAt(1) - 49;
        VendingItem boughtItem = getItemAt(row, col);
        cart.addItem(boughtItem);
        return true;
    }

}