using StgSharp.Graphics;

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

namespace StgSharp.Logic
{
    public abstract partial class ViewModelBase
    {
        public void ShowViewPort()
        {

        }

        private Blueprint renderLogic;

        /// <summary>
        /// Render logic for every frame with no relation to <see cref="View"/>.
        /// </summary>
        public Blueprint GeneralRenderLogic
        {
            get => renderLogic;
            set => renderLogic = value;
        }

        /// <summary>
        /// Init this form and render it on screen, and respond with operation
        /// </summary>
        public unsafe void Show()
        {
            BuildGlobalKeyControl();
            while(0 == InternalIO.glfwWindowShouldClose(this.viewPortDisplay.ViewPortID))
            {
                viewPortDisplay.FlushSize();
                foreach (var item in this._globalKeyAction)
                {
                    if (InternalIO.glfwGetKey(this.viewPortDisplay.ViewPortID, (int)item.Key.TargetKeyOrButtonID) 
                        == item.Key.TriggeredStatus)
                    {
                        item.Value();
                    }
                }
                BlueprintRunner.Run(renderLogic, ()=>ShouldClose);
                RenderStream.PollEvents();
                frameTimeProvider.WaitNextSpan();
                Interlocked.Add(ref _frameCount, 1);
            }
        }

        private unsafe void PrivateShow()
        {
            if(0 == InternalIO.glfwWindowShouldClose(this.viewPortDisplay.ViewPortID))
            {
                frameTimeProvider.WaitNextSpan();
                Interlocked.Add(ref _frameCount, 1);
                viewPortDisplay.FlushSize();
                foreach (var item in this._globalKeyAction)
                {
                    if (InternalIO.glfwGetKey(this.viewPortDisplay.ViewPortID, (int)item.Key.TargetKeyOrButtonID)
                        == item.Key.TriggeredStatus)
                    {
                        item.Value();
                    }
                }
                BlueprintRunner.Run(renderLogic, () => ShouldClose);
                RenderStream.PollEvents();
            }
        }

        public T BuildNewRenderStream<T>(View arg, (int x, int y, int z) unitCubeSize) where T : RenderStream
        {
            if (arg.ContextName == this.Name)
            {

            }
            T? ret = Activator.CreateInstance(typeof(T), arg) as T;
            if (ret == null)
            {
                throw new InvalidOperationException("Failed in building a new RenderStream when calling AsMainStreamOf");
            }
            ret!.InternalInit();
            ret.timeProvider = this.frameTimeProvider;
            return ret;
        }
    }
}