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;
using Diplom_O.DataBase;
using System.Security.Cryptography;

namespace Diplom_O
{
	public partial class LoginForm : Form
	{
		public bool isCanceled = false;
		public LoginForm()
		{
			InitializeComponent();
			try
			{
				loginBox.Items.Clear();
				var userList = FuncDB.UserList();
				foreach (var usr in userList)
					loginBox.Items.Add(usr.Login);
				if (loginBox.Items.Count > 0)
					loginBox.SelectedIndex = 0;
			}
			catch (Exception e)
			{
				this.ShowError(errorLabel, e.Message);
				workButton.Enabled = false;
			}
		}

		private void workButton_Click(object sender, EventArgs e)
		{
			try
			{
				var _user = FuncDB.UserGetByLogin((string)loginBox.Text);
				if (_user == null)
					throw new Exception("Пользователя не существует.");
				if (_user.Pass != textBox1.Text)
					throw new Exception("Не верный пароль.");
				byte[] pass_bytes = Encoding.ASCII.GetBytes(textBox1.Text);
				var pass_hash_bytes = new MD5CryptoServiceProvider().ComputeHash(pass_bytes);
				_user.Pass = Encoding.ASCII.GetString(pass_hash_bytes);
				this.SetUser(_user);
				this.SetNextForm(_user.Default);
				this.Close();
			}
			catch (Exception ex)
			{
				this.ShowError(errorLabel, ex.Message);
			}
		}
		private void canceledButton_Click(object sender, EventArgs e)
		{
			isCanceled = true;
			this.Close();
		}
  }
}