REGISTRATION

using System;
using System.Windows.Forms;
using System.Text.RegularExpressions;

namespace CamposanoCRUDFirebaseFinalTask.Forms.Menu
{
    public partial class Form_Register : Form
    {
        private string _FullName;
        private int _Age;
        private long _ContactNo, _StudentNo;

        public long StudentNumber(string studNum)
        {
            try
            {
                _StudentNo = long.Parse(studNum);
                if(studNum == "")
                {
                    throw new ArgumentException(MessageBox.Show("Student number field is empty").ToString());
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            return _StudentNo;
        }
        public long ContactNo(string Contact)
        {
            try
            {
                if (Regex.IsMatch(Contact, @"^[0-9]{10,11}$"))
                {
                    _ContactNo = long.Parse(Contact);
                }
                else if (Contact == "")
                {
                    throw new ArgumentException(MessageBox.Show("Contact number field is empty").ToString());
                }
                else
                {
                    throw new ArgumentException(MessageBox.Show("Student number field is out of range").ToString());
                }
            } 
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            return _ContactNo;
        }
        public string FullName(string LastName, string FirstName, string MiddleInitial)
        {
            try
            {
                if (Regex.IsMatch(LastName, @"^[a-zA-Z]+$") || Regex.IsMatch(FirstName, @"^[a-zA-Z]+$") || Regex.IsMatch(MiddleInitial, @"^[a-zA-Z]+$"))
                {
                    _FullName = LastName + ", " + FirstName + ", " + MiddleInitial;
                }
                else
                {
                    throw new ArgumentException(MessageBox.Show("Please check your full name fields and try again").ToString());
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            return _FullName;
        }
        public int Age(string age)
        {
            try
            {
                if (Regex.IsMatch(age, @"^[0-9]{1,3}$"))
                {
                    _Age = Int32.Parse(age);
                }
                else if (age == "")
                {
                    throw new ArgumentException(MessageBox.Show("Age field is empty").ToString());
                }
                else
                {
                    throw new ArgumentException(MessageBox.Show("Age index is invalid").ToString());
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            return _Age;
        }

        public Form_Register()
        {
            InitializeComponent();
        }

        private void btnRegister_Click(object sender, EventArgs e)
        {
            try
            {
                this.TopMost = false;
                StudentInformationClass.SetFullName = FullName(txtLastName.Text, txtFirstName.Text, txtMiddleInitial.Text);
                StudentInformationClass.SetStudentNo = (int)StudentNumber(txtStudentNo.Text);
                StudentInformationClass.SetProgram = cbPrograms.Text;
                StudentInformationClass.SetGender = cbGender.Text;
                StudentInformationClass.SetContactNo = Convert.ToInt32(txtContactNo.Text);
                StudentInformationClass.SetAge = Age(txtAge.Text);
                StudentInformationClass.SetBirthDay = datePickerBirthday.Value.ToString("yyyy-MM-dd");
            }
            catch (FormatException)
            {
                MessageBox.Show("Please input numbers only in\nContact Number and Student No. fields", "Notice", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }

            Form_Confirmation frm = new Form_Confirmation();
            frm.ShowDialog();
        }

        private void Form_Register_Load(object sender, EventArgs e)
        {
            string[] ListOfProgram = new string[]
            {
                "BS Information Technology",
                "BS Computer Science",
                "BS Information Systems",
                "BS in Accountancy",
                "BS in Hospitality Management",
                "BS in Tourism Management"
            };
            for (int i = 0; i < 6; i++)
            {
                cbPrograms.Items.Add(ListOfProgram[i].ToString());
            }
        }
    }
}