using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace SecondApp1 {

    class User {
        // Data

        public string email;
        public string password;


        // Methods
    }

    public partial class Form1 : Form {

        // Data  -----------------------------------
        User[] users;


        // Methods ---------------------------------

        //Constructor
        public Form1() {
            // Creates UI (Buttons, Labels, Textboxes)
            InitializeComponent();

            ClearErrorMessages();

            // Create test user
            // Local variable

            // TestUser 1
            User testUser = new User();
            testUser.email = "123.123@asd.hu";
            testUser.password = "12345";

            // TestUser 2
            User testUser2 = new User();
            testUser2.email = "321.321@asd.hu";
            testUser2.password = "12345";

            users = new User[2];
            users[0] = testUser;
            users[1] = testUser2;

        }
        // EventHandler
        private void loginBTN_Click(object sender, EventArgs e) {

            // Collecting inputs
            string email = emailTB.Text;
            string password = passwordTB.Text;

            // Clear error messages
            ClearErrorMessages();

            // Popup = IntelliSense

            // Email test

            if (email == string.Empty) {

                emailErrorLB.Text = "Email is required!";

            } else if (!email.Contains('@')) {

                emailErrorLB.Text = "Email must contain an @(at) sign!";

            } else if (email.Length < 5) {

                emailErrorLB.Text = "Email is too short!";

            } else if (!email.EndsWith(".hu")) {

                emailErrorLB.Text = "Email must end with (.hu)!";

            }


            // Password Test


            if (password == string.Empty) {
                pwErrorLB.Text = "Password is required!";

            } else if (password.Length < 5) {

                pwErrorLB.Text = "Password is too short!";

            }


            if (emailErrorLB.Text == string.Empty && pwErrorLB.Text == string.Empty) {

                // Find out the user's name

                // 1st method
                //string name = email.Substring(0, email.IndexOf('@'));


                // 2nd method
                // alma@gmail.com@asdjaskld@akljdfasj
                // 0. alma
                // 1. gmail.com

                //char[] firstInChar = firstName.ToCharArray();

                string fullName = email.Split('@')[0];


                string[] nameArray = fullName.Split('.');
                string firstName = nameArray[0];
                string lastName = nameArray[1];




                if (nameArray.Length == 2) {

                    firstName = nameArray[0];
                    lastName = nameArray[1];

                } else if (nameArray.Length == 1) {

                    firstName = nameArray[0];
                    lastName = "";

                }


                // Nake first letter capital

                if (nameArray.Length > 1) {

                    firstName = firstName[0].ToString().ToUpper() + firstName.Substring(1);
                }
                if (nameArray.Length == 2) {
                    lastName = lastName.First().ToString().ToUpper() + lastName.Substring(1);
                }


                // Check if the user is in the users array

                //Code snippet

                int index = 0;
                bool isFound = false;
                do {

                    if (users[index].email == email && users[index].password == password) {

                        isFound = true;
                    }

                    index++;
                } while (!isFound && index < users.Length);


                // For tag Ctrl K + Ctrl + C/U
                // User is in the DB

                if (isFound) {

                    MessageBox.Show("Welcome, " + firstName + " " + lastName + "!");

                } else {

                    MessageBox.Show("Wrong email or password");
                }




            }

        }

        private void ClearErrorMessages() {
            emailErrorLB.Text = "";
            pwErrorLB.Text = string.Empty;
        }



    }
}