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

namespace Tango.MachineStudio.Common
{
    /// <summary>
    /// Represents a Machine Studio view model.
    /// </summary>
    public interface IStudioViewModel
    {
        /// <summary>
        /// Called when the user has navigated in to the module.
        /// </summary>
        void OnNavigatedTo();

        /// <summary>
        /// Called when the user has navigated out of the module.
        /// </summary>
        void OnNavigatedFrom();

        /// <summary>
        /// Called when application is shutting down.
        /// </summary>
        void OnShuttingDown();

        /// <summary>
        /// Called before the application is shutting down.
        /// Return false to cancel the shutdown in case an important process is in progress.
        /// </summary>
        /// <returns></returns>
        Task<bool> OnShutdownRequest();

        /// <summary>
        /// Called when another module has wants to navigate to this module with some arguments.
        /// </summary>
        /// <param name="args">The arguments.</param>
        void OnModuleRequest(params object[] args);

        /// <summary>
        /// Called when the application has been started
        /// </summary>
        void OnApplicationStarted();
    }
}