using System;
using System.Collections.Generic;
using System.Text;

namespace Nuclex
{
    internal abstract class GameHost
    {
        // Events
        internal event EventHandler Activated;

        internal event EventHandler Deactivated;

        internal event EventHandler Exiting;

        internal event EventHandler Idle;

        internal event EventHandler Resume;

        internal event EventHandler Suspend;

        // Methods
        protected GameHost()
        {
        }

        internal abstract void Exit();

        protected void OnActivated()
        {
            if (this.Activated != null)
            {
                this.Activated(this, EventArgs.Empty);
            }
        }

        protected void OnDeactivated()
        {
            if (this.Deactivated != null)
            {
                this.Deactivated(this, EventArgs.Empty);
            }
        }

        protected void OnExiting()
        {
            if (this.Exiting != null)
            {
                this.Exiting(this, EventArgs.Empty);
            }
        }

        protected void OnIdle()
        {
            if (this.Idle != null)
            {
                this.Idle(this, EventArgs.Empty);
            }
        }

        protected void OnResume()
        {
            if (this.Resume != null)
            {
                this.Resume(this, EventArgs.Empty);
            }
        }

        protected void OnSuspend()
        {
            if (this.Suspend != null)
            {
                this.Suspend(this, EventArgs.Empty);
            }
        }

        internal abstract void PreRun();
        internal abstract void PostRun();

        // Properties
        internal abstract GameControl Control { get; }
    }
} // namespace Nuclex