import java.util.Scanner;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.text.DecimalFormat;
import java.nio.file.Files;



public class CreditCard {

	public static void main(String[] args) throws FileNotFoundException {
		Scanner scan = new Scanner(System.in);
		Random rand = new Random();
		SimpleDateFormat dateFormat = new
		SimpleDateFormat("MM/dd/yyyy");
		Date dateObj = new Date();
		String date = dateFormat.format(dateObj);

		int task = 90;
		int value2 = rand.nextInt(10000) + 1000;
		int value3 = rand.nextInt(10000) + 1000;
		int value4 = rand.nextInt(10000) + 1000;
		int value5 = rand.nextInt(10000) + 1000;


		String name = null, cardNumber, phoneNumber, ssNumber, address;
		String username = null;
		String password = null;
		double creditLine, availableCredit, balance, minPay, intrate;

		//setting the constants for this lab
		cardNumber = "" + value2 + value3 + value4 + value5;
		availableCredit = 2000;
		creditLine = 2000;
		intrate = .1699;
		balance = 0;
		minPay = 0;

		//use while loop to retrieve the outputs and reenter switch statement
		while (task!=0)
		{


			System.out.println("CREDIT CARD SERVICE MENU");
			System.out.println("1. Open new credit card");
			System.out.println("2. One transaction");
			System.out.println("3. Print statement");
			System.out.println("4. Payment");
			System.out.println("5. Get Available credit amount");
			System.out.println("6. Get Interest Rate");

			task = scan.nextInt();
			scan.nextLine();

			//switch statement to handle cases
			switch (task)
			{
			//open new credit card
				case 1:
					System.out.println("Enter your name.");
					name = scan.nextLine();
					System.out.println("Enter your SS number.");
					ssNumber = scan.nextLine();
					System.out.println("Enter your phone number.");
					phoneNumber = scan.nextLine();
					System.out.println("Enter your address.");
					address = scan.nextLine();
					System.out.println("Enter your username.");
					username = scan.nextLine();
					System.out.println("Enter your password.");
					password = scan.nextLine();


				    DecimalFormat ft = new DecimalFormat("####");

					System.out.println("Credit Card is available for you.");
					System.out.println("Name: \t \t " + name);
					System.out.println("Card number: \t " + cardNumber);
					System.out.println("Credit Line: \t " + creditLine);
					System.out.println("Available Credit: " + availableCredit);
					System.out.println("Current Balance:   " + balance);
					System.out.println("Interest Rate: \t  " + intrate);
					System.out.println("Minimum payment amount Due: " + minPay);
					break;

				// one transaction
				case 2:
					System.out.println("Enter username.");
					String usernameUser = scan.nextLine();
					System.out.println("Enter password.");
					String passwordUser = scan.nextLine();

					//verify user/password
					if (username.contentEquals(usernameUser) && password.contentEquals(passwordUser))
					{
						//getting transaction
						System.out.println("Description of Transaction?");
						String transaction = scan.nextLine();
						System.out.println("Type?");
						String type = scan.nextLine();
						System.out.println("Enter amount.");
						double amount = scan.nextDouble();
						if (amount > availableCredit)
						{
							System.out.println("Transaction is denied.");
							break;
						}
						else
						{
						balance = balance + amount;
						availableCredit = availableCredit - amount;
						PrintWriter fileName = new
						PrintWriter("statement_2438371220124047.txt");

						fileName.println("date " + dateObj + " " + type + "    $" + amount);
						fileName.close();
						}
					}
					else
						System.out.println("The username or password does not match.");
						break;

				case 3:
					PrintWriter fileName2 = new
					PrintWriter("statement_512941322288144_1002017.txt");

					fileName2.println("Name: \t \t " + name);
					fileName2.println("Card number: \t " + cardNumber);
					fileName2.println("Credit Line: \t " + creditLine);
					fileName2.println("Available Credit: " + availableCredit);
					fileName2.println("Current Balance:   " + balance);
					fileName2.println("Interest Rate: \t  " + intrate);
					fileName2.println("Minimum payment amount Due: " + minPay);
					fileName2.println("Payment Due date:" + dateObj);


					break;
				case 4:
					break;
				case 5:
					System.out.println("Current availalbe credit amount:" + availableCredit);
					break;
				case 6:
					System.out.println("Current interest rate: " + intrate);
					break;


		}





}
}
}