using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using Tango.BL.Entities;
using Tango.Integration.Operation;
using Tango.Integration.ExternalBridge;

namespace Tango.PPC.Common.Application
{
    /// <summary>
    /// Represents the application manager.
    /// </summary>
    public interface IPPCApplicationManager
    {
        /// <summary>
        /// Occurs when the application has started.
        /// </summary>
        event EventHandler ApplicationStarted;

        /// <summary>
        /// Occurs when the application is ready and all modules are views are loaded.
        /// </summary>
        event EventHandler ApplicationReady;

        /// <summary>
        /// Occurs when the main window content has been rendered.
        /// </summary>
        event EventHandler ContentRendered;

        /// <summary>
        /// Occurs when all PPC modules are ready and initialized.
        /// </summary>
        event EventHandler ModulesInitialized;

        /// <summary>
        /// Occurs when machine setup is required.
        /// </summary>
        event EventHandler SetupRequired;

        /// <summary>
        /// Occurs when a system restart is required.
        /// </summary>
        event EventHandler SystemRestartRequired;

        /// <summary>
        /// Occurs when the updater utility has failed to perform the last update.
        /// </summary>
        event EventHandler UpdaterFailed;

        /// <summary>
        /// Occurs when the application has encountered an error when initializing.
        /// </summary>
        event EventHandler<Exception> ApplicationInitializationError;

        /// <summary>
        /// Gets a value indicating whether the application is shutting down.
        /// </summary>
        bool IsShuttingDown { get; }

        /// <summary>
        /// Gets a value indicating whether the application is in technician mode.
        /// </summary>
        bool IsInTechnicianMode { get; }

        /// <summary>
        /// Gets a value indicating whether an update has occurred before the application started.
        /// </summary>
        bool IsAfterUpdate { get;  }

        /// <summary>
        /// Gets a value indicating whether the updater utility has failed to perform the last update.
        /// </summary>
        bool IsUpdateFailed { get; }

        /// <summary>
        /// Shutdown the application.
        /// </summary>
        void ShutDown();

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

        /// <summary>
        /// Runs the updater utility and exits the application.
        /// </summary>
        void UpdateApplication(String updaterPath, String arguments);

        /// <summary>
        /// Enteres the application technician mode.
        /// </summary>
        void EnterTechnicianMode(bool displayNotification = true);

        /// <summary>
        /// Exits the application technician mode.
        /// </summary>
        void ExitTechnicianMode();

        /// <summary>
        /// Gets the application version.
        /// </summary>
        Version Version { get; }

        /// <summary>
        /// Gets the firmware version.
        /// </summary>
        Version FirmwareVersion { get; }

        /// <summary>
        /// Gets the application build date.
        /// </summary>
        String BuildDate { get; }

        /// <summary>
        /// Gets the application startup date.
        /// </summary>
        DateTime StartUpDate { get; }

        /// <summary>
        /// Gets or sets the application folder.
        /// </summary>
        String StartPath { get; }

        /// <summary>
        /// Gets or sets a value indicating whether the screen is currently locked.
        /// </summary>
        bool IsScreenLocked { get; set; }

        /// <summary>
        /// Resets the screen lock timer.
        /// </summary>
        void ResetScreenLockTimer();

        /// <summary>
        /// Invokes a dialog for entering a password and releasing the screen lock.
        /// </summary>
        void ReleaseScreenLock();

        /// <summary>
        /// Sets the state of the main window.
        /// </summary>
        /// <param name="state">The state.</param>
        void SetWindowState(WindowState state);
    }
}