using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Tango.PPC.Common.OS
{
    /// <summary>
    /// Represents a windows license activation manager.
    /// </summary>
    public interface IOperationSystemManager
    {
        /// <summary>
        /// Determines whether the OS is activated.
        /// </summary>
        /// <returns></returns>
        Task<bool> IsActivated();

        /// <summary>
        /// Activates the OS using the specified activation key.
        /// </summary>
        /// <param name="activationKey">The activation key.</param>
        /// <returns></returns>
        Task Activate(String activationKey);

        /// <summary>
        /// Deactivates the OS license.
        /// </summary>
        /// <returns></returns>
        Task Deactivate();

        /// <summary>
        /// Gets the available time zones.
        /// </summary>
        /// <returns></returns>
        ReadOnlyCollection<TimeZoneInfo> GetAvailableTimeZones();

        /// <summary>
        /// Changes the operation system time zone.
        /// </summary>
        /// <param name="timeZone">The time zone.</param>
        /// <returns></returns>
        Task ChangeTimeZone(TimeZoneInfo timeZone);

        /// <summary>
        /// Gets the machine unique identifier.
        /// </summary>
        /// <returns></returns>
        Task<String> GetDeviceId();

        /// <summary>
        /// Gets the machine host name.
        /// </summary>
        /// <returns></returns>
        Task<String> GetDeviceName();

        /// <summary>
        /// Restarts the system.
        /// </summary>
        /// <returns></returns>
        void Restart();

        /// <summary>
        /// Shutdown the system.
        /// </summary>
        /// <returns></returns>
        void Shutdown();
    }
}