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 WindowsFormsApp3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            CreateUsers();
        }
        AdminPanel _AdminPanel;

        string[,] userdata = new string[3, 2];

        private void CreateUsers()
        {
            userdata[0, 0] = "jan";
            userdata[0, 1] = "abc123";

            userdata[0, 0] = "adm";
            userdata[0, 1] = "123456";

            userdata[0, 0] = "admin";
            userdata[0, 1] = "12345";
        }


        private void LoginButton_Click(object sender, EventArgs e)
        {
            if(txt_login.Text.Length == 0)
            {
                txt_login.Focus();
            }

            if(txt_password.Text.Length == 0)
            {
                txt_password.Focus();
            }
            auth(txt_login.Text, txt_password.Text);
        }

        private void CloseButton_Click(object sender, EventArgs e)
        {
            Close();
        }

        private void auth(string user, string password)
        {
            for(int i = 0; i < userdata.GetLength(0); i++)
            {
                if(user== userdata[i,0] && password == userdata[i, 1])
                {
                    if ((_AdminPanel = (AdminPanel)checkifwinopen(typeof(AdminPanel))) == null)
                    {
                        _AdminPanel = new AdminPanel();
                        _AdminPanel.Show();
                    }
                    else _AdminPanel.BringToFront();
                    break;
                }
            }

        }
        private Form checkifwinopen(Type FormType)
        {
            foreach(Form OpenForm in Application.OpenForms)
            {
                if (OpenForm.GetType() == FormType) return OpenForm;
            }
            return null;
        }
    }

}