Main.java

package org.codedifferently;

public class Main {

    static void main()
    {
        //Gather all User Info from UserInput class methods
        UserInput userInput = new UserInput();
        String firstName = userInput.promptUserName(true);
        String lastName = userInput.promptUserName(false);
        double budget = userInput.promptUserBudget();
        String couponCode = userInput.promptCouponCode();

        //Print Walmart receipt with dashes for formatting
        System.out.println("-----------------------------------------------");
        System.out.println("Welcome to Walmart!");

        //Calculate visitID
        MathCalc mathCalc = new MathCalc();
        int visitID = mathCalc.generateRandomNumber(1000,9999);
        System.out.println("Visit ID: " + visitID);

        //then calculate receiptCode
        StringLogic stringLogic = new StringLogic();
        String receiptCode = stringLogic.generateReceiptCode(firstName, lastName);
        System.out.println("Receipt Code: " + receiptCode);

        //generate random item prices
        double item1Price = mathCalc.generateRandomNumber(5,75);
        double item2Price = mathCalc.generateRandomNumber(10,85);
        double item3Price = mathCalc.generateRandomNumber(15, 105);
        System.out.println("Item 1: $" + item1Price);
        System.out.println("Item 2: $" + item2Price);
        System.out.println("Item 3: $" + item3Price);

        //generate coupon rate if valid coupon is applied
        double couponRate = (stringLogic.checkValidCoupon(couponCode))
                ? mathCalc.generateCouponDiscount()
                : 0;

        //calculate total subtotal of all three items
        double subTotal = item1Price + item2Price + item3Price;

        System.out.println("Subtotal: $" + subTotal);
        System.out.println("-----------------------------------------------");

        //then calculate a random taxRate
        double taxRate = mathCalc.generateTaxRate();
        System.out.println("Tax Rate: " + (int)(taxRate * 100) + "%");

        //apply coupons ßfor random %ß off as well, if invalid code do not apply discount.
        if(couponRate > 0) {
            System.out.println("Valid coupon entered!");
            System.out.println("Applied " + (couponRate * 100) + "% discount");
        }
        else {
            System.out.println("Invalid coupon code! No discount applied!");
            System.out.println("Make sure your coupons start with c-");
        }

        //calculate final total based on taxes and coupons
        double finalTotal = mathCalc.calculateFinalTotal(subTotal, taxRate, couponRate);
        System.out.println("Final total: $" + finalTotal);

        //get and return budget remaining for user to see. if no budget left, then notify them
        double budgetRemaining = mathCalc.calculateRemainingBudget(budget, finalTotal);
        if (budgetRemaining < 0)
        {
            System.out.println("Looks like the items are past your budget! \n" +
                    "You'll have to pay this amount to continue: \n$" +
                    mathCalc.calculateAbsoluteValue(budgetRemaining));
        }
        else {
            System.out.println("Budget Remaining: $" + budgetRemaining);
        }

        System.out.println("Thank you for shopping at Walmart!");
        System.out.println("------------------------------------------------");
    }
}