ZomerPOS - Final

/**
        Name:  Zomer L. Gregorio
        Course & Section:  BSIT 112
        Subject:  Computer Programming 1
        Teacher:  Jerome Austria
**/

import java.text.SimpleDateFormat;
import java.util.*;

public class ZomerPOS {
    //Date, receipt#, & scanner
    final static Date currentTime = new Date();
    final static SimpleDateFormat sdf = new SimpleDateFormat("EEE, MMM d, yyyy");
    final static SimpleDateFormat receipt = new SimpleDateFormat("yyyyMMddHHmmss");
    static Scanner write = new Scanner(System.in);
    //Product lists, prices, default quantities, etc.
    static int numOfProduct = 35;
    final static String[] productList = {"Chicken Adobo", "Chicken Inasal", "Chicken Curry",
                                         "Chicken Teriyaki", "Fried Chicken", "Pork Adobo",
                                         "Pork Sisig", "Lechon Kawali", "Lechon Paksiw",
                                         "Sinigang", "Beef Caldereta", "Beef Steak",
                                         "Beef Kare-Kare", "Beef Mechado", "Bulalo",
                                         "Cassava Cake",  "Buko Pandan Salad", "Fruit Salad",
                                         "Ginataang Bilo-Bilo",  "Macaroni Salad", "Pichi-Pichi",
                                         "Ube Halaya", "Ice Cream", "Leche Flan", "Halo-Halo",
                                         "Coke", "Sprite", "Royal", "Orange Juice", "Mango Juice",
                                         "Lemon Ice Tea", "Fruit Safari", "Calamansi Slushie",
                                         "Pink Lemonade", "Mint Jito"};
    final static double[] productPrice = {130, 130, 135, 125, 125, 130, 120, 125, 130, 120,
                                          130, 135, 135, 130, 120, 40, 50, 50, 30, 50,
                                          40, 40, 40, 60, 40, 15, 15, 15, 20, 20,
                                          20, 90, 80, 110, 120};
    static int[] productQty = new int[35];
    static double taxPercent = 0.05d, amountDue, cash, change, taxAmount, totalAmount;
    static String customerName;
    static int inputRepeat; //Input for repeating the program
    static int longest = 0, numOfSpaces; //longest character in productList
    private static Scanner scanName = new Scanner(System.in);

    public static void main(String[] args) {
        do {
            menu();
            getOrder();
            reviewOrders();
            payment();
            repeatProcess();
        } while (inputRepeat == 1);
    }

    public static void menu() {
        //Get length of longest character in productList for display alignment
        for (int i = 0; i < numOfProduct; i++)
            if (longest < productList[i].length())
                 longest = productList[i].length();
        // Display menu
        System.out.print("----------------------------------------------------------");
        System.out.print("\n\t\t\tZOMER'S UNLIRICE RESTAURANT \t\t");
        System.out.print("\n\t       Welcome! Please choose your order.\t");
        System.out.print("\n----------------------------------------------------------");
        System.out.print("\n CODE\t\tPRODUCT\t\t\tPRICE");
        System.out.print("\n\t\t\t\t");
        //Meal
        System.out.print("\n----------------------------------------------------------");
        System.out.print("\n\t\t\t| MEALS |");
        System.out.print("\n----------------------------------------------------------");
        for (int i = 0; i < 9; i++) { //productList [0-8]
            System.out.printf("\n [0%d]\t\t%s", i+1, productList[i]);
            numOfSpaces = longest - productList[i].length() +2;
                for (int j = 0; j < numOfSpaces; j++)
                    System.out.print(" ");
            System.out.printf("\tPHP %.2f", productPrice[i]);
        }
        for (int i = 9; i < 15; i++) { //productList [9-14]
            System.out.printf("\n [%d]\t\t%s", i+1, productList[i]);
            numOfSpaces = longest - productList[i].length() +2;
                for (int j = 0; j < numOfSpaces; j++)
                    System.out.print(" ");
            System.out.printf("\tPHP %.2f", productPrice[i]);
        }
        //Desserts
        System.out.print("\n----------------------------------------------------------");
        System.out.print("\n\t\t\t| DESSERTS |");
        System.out.print("\n----------------------------------------------------------");
        for (int i = 15; i < 25; i++) { //productList [15-24]
            System.out.printf("\n [%d]\t\t%s", i+1, productList[i]);
            numOfSpaces = longest - productList[i].length() +2;
                for (int j = 0; j < numOfSpaces; j++)
                    System.out.print(" ");
            System.out.printf("\tPHP %.2f", productPrice[i]);
        }
        //Drinks
        System.out.print("\n----------------------------------------------------------");
        System.out.print("\n\t\t\t| DRINKS |");
        System.out.print("\n----------------------------------------------------------");
        for (int i = 25; i < 35; i++) { //productList [25-34]
            System.out.printf("\n [%d]\t\t%s", i+1, productList[i]);
            numOfSpaces = longest - productList[i].length() +2;
                for (int j = 0; j < numOfSpaces; j++)
                    System.out.print(" ");
            System.out.printf("\tPHP %.2f", productPrice[i]); // END
        }
        System.out.print("\n----------------------------------------------------------");
        System.out.print("\nEnter product code & quantity to place the order.");
        System.out.print("\nEnter negative number to quantity to delete the product(s) you ordered.");
        System.out.print("\nEnter 0[zero] to product code if you wish to review or finish your order(s).\n");
    } //End of menu() method

    public static void getOrder() {
        int code, qty;
        while (true) {
            System.out.print("\nEnter Product Code: ");
            if (!write.hasNextInt()){ //Input Mismatch Exception Handler
                System.out.print("Invalid product code. Please try again.");
                write.next(); //discard
                continue;
            }
            code = write.nextInt();
            if (code > 0 && code < 16) {
                System.out.print("Meal: " + productList[code-1] + "\n");
            }
            else if (code > 15 && code < 26) {
                System.out.print("Dessert: " + productList[code-1] + "\n");
            }
            else if (code > 25 && code < 36) {
                System.out.print("Drink: " + productList[code-1] + "\n");
            }
            //Execute loop if user enters below 0 or above product code
            else if (code < 0 ||  code > numOfProduct) {
                System.out.print("Invalid product code. Please try again.");
                continue;
            }
             else if (code == 0)
             break;
        while (true) {
            System.out.print("Enter Product Quantity: ");
            if (!write.hasNextInt()) { //Input Mismatch Exception Handler
                System.out.print("Invalid input. Please try again.\n");
                write.next(); //discard
                continue;
            }
            qty = write.nextInt();
            if (qty > 0) {
                productQty[code-1] += qty;
            }
            else if  (qty == 0) {
                System.out.print("Cancelled.\n");
            }
            //Deleted ordered products
            else if (qty < 0 && productQty[code-1] >= Math.abs(qty)) {
                productQty[code-1] -= Math.abs(qty);
                System.out.print(productList[code-1] + ": " + Math.abs(qty) + " quantity deleted.\n");
            }
            else if (qty < 0 && productQty[code-1] < Math.abs(qty)) {
                System.out.print("Not enough quantites to be deleted. ");
                System.out.print("Please try again.\n");
                continue;
            }
            break;
            }
        }
    } //End of getOrder() method

    public static void reviewOrders() {
        while (true) {
            // Display & review ordered products & total amount to be paid
            System.out.print("\nReview Order(s): ");
            for (int i = 0; i < numOfProduct; i++) {
                if (productQty[i] > 0) {
                    System.out.printf("\nCode %d\t%s", i+1, productList[i]);
                    numOfSpaces = longest - productList[i].length()+3;
                        for (int j = 0; j < numOfSpaces; j++)
                            System.out.print(" ");
                    System.out.printf("Qty: %d\t Subtotal: PHP %.2f", productQty[i], productPrice[i] * productQty[i]);
                }
            }
            for (int i = 0; i < numOfProduct; i++) {
                amountDue += productPrice[i] * productQty[i]; //Computation of amountDue
            }
            taxAmount = amountDue * taxPercent;
            totalAmount = amountDue + taxAmount; //Total amount to be paid
            System.out.printf("\n\nAmount Due: \t\tPHP %.2f", amountDue);
            System.out.print("\n5% Tax Charge: ");
            System.out.printf("\t\tPHP %.2f", taxAmount);
            System.out.printf("\nTotal Amount: \t\tPHP %.2f", totalAmount);
            System.out.print("\n-----------------------------------------------------------");
            System.out.print("\nDo you want to finish your order?\nEnter 1 for Yes or 0 for No: ");
            while (true) {
                if (!write.hasNextInt()) { //Input Mismatch Exception Handler
                    System.out.print("Please enter 1 or 0 only: ");
                    write.next(); //discard
                    continue;
                }
                int orderAns = write.nextInt();
                if (orderAns == 1) {
                    return;
                }
                else if (orderAns == 0) {
                    getOrder();
                }
                else {
                    System.out.print("Please enter 1 or 0 only: ");
                    continue;
                }
            break;
            }
        }
    } //End of reviewOrders() method

    public static void payment() {
        // Getting customer name & cash
        System.out.print("\n\nPayment");
        System.out.print("\nPlease enter your name: ");
        customerName = scanName.nextLine();
        while (true) {
            System.out.print("Enter Cash: PHP ");
            if (!write.hasNextDouble()){ //Input Mismatch Exception Handler
                System.out.print("Please enter a valid amount.\n");
                write.next(); //discard
                continue;
            }
            cash = write.nextDouble();
            if (cash >= totalAmount) {
                change = cash - totalAmount;
                //Print  receipt
                System.out.print("\n\n\n***********************************************************");
                System.out.print("\n\t\t\t\tZomer's Unlirice Restaurant");
                System.out.print("\n\t\t\t\t Alabang, Muntinlupa City");
                System.out.print("\n***********************************************************");
                System.out.print("\nReceipt #: " + receipt.format(currentTime));
                System.out.print("\nDate: " + sdf.format(currentTime));
                System.out.print("\nCustomer Name: " + customerName);
                System.out.print("\n***********************************************************");
                System.out.print("\nORDER: \n\tProduct\t\t\t\tQuantity\t\tSubtotal");
                for (int i = 0; i < numOfProduct; i++) {
                    if (productQty[i] > 0) {
                        System.out.printf("\n\t%s", productList[i]);
                        numOfSpaces = longest - productList[i].length()+3;
                            for (int j = 0; j < numOfSpaces; j++)
                                System.out.print(" ");
                        System.out.printf("%d\t\t\t\tPHP %.2f", productQty[i], productPrice[i] * productQty[i]);
                    }
                }
                System.out.print("\n***********************************************************");
                System.out.print("\n\t\t\t5% Tax Charge: ");
                System.out.printf("\t\t\t\tPHP %.2f", taxAmount);
                System.out.printf("\n\t\t\tAmount Due: \t\t\t\tPHP %.2f", amountDue);
                System.out.printf("\n\t\t\tTotal Amount To Be Paid: \tPHP %.2f", totalAmount);
                System.out.printf("\n\t\t\tCASH TENDERED: \t\t\t\tPHP %.2f", cash);
                System.out.printf("\n\t\t\tChange: \t\t\t\t\tPHP %.2f", change);
                System.out.print("\n***********************************************************");
                System.out.print("\n\t\t   This serves as your Official Receipt.");
                System.out.print("\n***********************************************************");
            }
            else if (cash < totalAmount) {
                System.out.print("Insufficient Cash. Please try again.\n");
                continue;
            }
        break;
        }
    } //End of payment() method

    public static void repeatProcess() {
        System.out.print("\n\n\nEnter 1 to process a new order or 0 to terminate the program.");
        System.out.print("\nEnter your answer: ");
        while (true) {
            if (!write.hasNextInt()) { //Input Mismatch Exception Handler
                System.out.print("Invalid input. Please try again: ");
                write.next(); //discard
                continue;
            }
            inputRepeat = write.nextInt();
            if (inputRepeat == 0) {
                System.out.print("\nThank you so much!");
                break;
            }
            else if (inputRepeat != 1 && inputRepeat != 0) {
                System.out.print("Invalid input. Please try again: ");
                continue;
            }

        //Reset all ordered products and total amount when the user process a new order
        for (int i = 0; i < numOfProduct; i++) {
            amountDue = 0;
            productQty[i] = 0;
        }
        System.out.println("\n");
        break;
        }
    } //End of repeatProcess() method

} //End of Class