using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Welcome to lab 12 by Rahmaan Ruth\n\n");

        //create the product code in question

        string strItemCode = "sony-dvd-062019";

        //split the string and place the comoponents into an array

        string[] strItemArray = strItemCode.Split('-');

        //Extract the date (year and month) from the array and place it in a String called date

        string date = strItemArray[2];

        //Access the date string, using the substring method, lets seperate the month and year into distinct strings

        String strItemMonth = date.Substring(0,2);

        String strItemYear = date.Substring(2,4);

        //Print our the necessary information for the user to view

        Console.WriteLine("Q1, For item {0}\n\nManufacturer: {1}\nProduct: {2}\nMonth: {3}\nYear: {4}\n\n\n", strItemCode, strItemArray[0],  strItemArray[1], strItemMonth, strItemYear);

        //Prompt user input from user, let them know what is required and what will happen if invalid input is detected

        Console.WriteLine("Q2, Please enter a valid email address. \nA valid email always contains an “@”. If you type an invalid email, I will warn you and stop the program. You will need to relaunch.");

        //Take input from user

        string userEmail = Console.ReadLine();

        //Capture index of @ sign for error checking mechanism, 

        int validEmail = userEmail.IndexOf('@');

        //Error checking for '@' in stirng for email, if there is not validEmail will be -1 

        if (validEmail == -1){

            Console.WriteLine("Invalid email detected. Please enter a valid email. Closing program.");

            return;

        }

        //split the user inputted email into an array at the @ sign

        string[] userEmailArray = userEmail.Split('@');

        //display the username and the domain seperately

        Console.WriteLine("Username: {0}\nDomain: {1}", userEmailArray[0], userEmailArray[1]);

    }

}