using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.BL.Entities;
using Tango.BL.Enumerations;
using Tango.FSE.BL;
using Tango.MachineService.Gateway;

namespace Tango.FSE.Common.Authentication
{
    /// <summary>
    /// Represents the user authentication provider responsible for the current logged-in user.
    /// </summary>
    public interface IAuthenticationProvider : IAuthenticationService
    {
        /// <summary>
        /// Occurs when the current logged-in user has changed.
        /// </summary>
        event EventHandler<User> CurrentUserChanged;

        /// <summary>
        /// Performs a user login by the specified email and password.
        /// </summary>
        /// <param name="email">The email.</param>
        /// <param name="password">The password.</param>
        /// <param name="environment">The environment.</param>
        /// <returns></returns>
        Task<AuthenticationResult> Login(String email, String password, EnvironmentConfiguration environment, Action<String> onStatusChanged = null);

        /// <summary>
        /// Changes the specified user password.
        /// </summary>
        /// <param name="email">The email.</param>
        /// <param name="oldPassword">The old password.</param>
        /// <param name="newPassword">The new password.</param>
        /// <returns></returns>
        Task ChangePassword(String email, String oldPassword, String newPassword);

        /// <summary>
        /// Logs-out the current logged-in user.
        /// </summary>
        void LogOut();
    }
}