using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Authentication;
using System.Text;
using System.Threading.Tasks;
using Tango.Core;
using Tango.DAL.Observables;
using Tango.MachineStudio.Common.Authentication;

namespace Tango.MachineStudio.UI.Authentication
{
    public class DefaultAuthenticationProvider : ExtendedObject, IAuthenticationProvider
    {
        private User _currentUser;

        public User CurrentUser
        {
            get { return _currentUser; }
            set
            {
                _currentUser = value;
                CurrentUserChanged?.Invoke(this, _currentUser);
                RaisePropertyChangedAuto();
            }
        }

        public event EventHandler<User> CurrentUserChanged;

        public User Login(string email, string password)
        {
            User user = ObservablesEntitiesAdapter.Instance.Users.SingleOrDefault(x => x.Email.ToLower() == email.ToLower() && x.Password == password);

            if (user == null)
            {
                throw new AuthenticationException("Login failed for user " + email);
            }

            CurrentUser = user;
            return user;
        }

        public void Logout()
        {
            CurrentUser = null;
        }
    }
}