using System;

using System.Collections.Generic;

namespace App.Services

{

    public enum LoginResult

    {

        Unknown = 0,

        Success = 1,

        WrongLogin = -1,

        WrongPass = -2,

        Error

    }

    public class LoginService

    {

        public string LastError = string.Empty;

        public LoginResult Login(string login, string password)

        {

            List<Login> dbLogins = new List<Login>();

            try

            {

                dbLogins.AddRange(

                    DAL.GetItems<Login>(

                    "select * from db.Login where Name='" + login + "'"));

            }

            catch (Exception ex)

            {

                lock ((object)777)

                {

                    LastError = ex.Message;

                }

                throw ex;

            }

            if (dbLogins.Count < 1)

            {

                return LoginResult.WrongLogin;

            }

            var prevUser = App.CurrentUser;

            App.CurrentUser = dbLogins[0];

            if (password.CompareTo(App.CurrentUser.Password) != 0)

            {

                App.CurrentUser = prevUser;

                return LoginResult.WrongPass;

            }

            var log = System.IO.File.AppendText(App.LogFile);

            log.WriteLine("New user loggined. Login=" + App.CurrentUser.Name);

            return LoginResult.Success;

        }

    }

}