using System;
using System.Collections.Generic;
using Robust.Client.Input;
using Robust.Client.ResourceManagement;
using Robust.Client.UserInterface;
using Robust.Shared.Graphics;
using Robust.Shared.Map;
using Robust.Shared.Maths;
using Robust.Shared.Timing;

namespace Robust.Client.Graphics
{
    internal interface IClydeInternal : IClyde, IClipboardManager
    {
        // Basic main loop hooks.
        void Render();
        void FrameProcess(FrameEventArgs eventArgs);
        void ProcessInput(FrameEventArgs frameEventArgs);

        // Init.
        bool SeparateWindowThread { get; }
        bool InitializePreWindowing();
        void EnterWindowLoop();
        bool InitializePostWindowing();
        void Ready();
        void TerminateWindowLoop();

        event Action<TextEnteredEventArgs> TextEntered;
        event Action<TextEditingEventArgs> TextEditing;
        event Action<MouseMoveEventArgs> MouseMove;
        event Action<MouseEnterLeaveEventArgs> MouseEnterLeave;
        event Action<KeyEventArgs> KeyUp;
        event Action<KeyEventArgs> KeyDown;
        event Action<MouseWheelEventArgs> MouseWheel;
        event Action<WindowRequestClosedEventArgs> CloseWindow;
        event Action<WindowDestroyedEventArgs> DestroyWindow;

        ClydeHandle LoadShader(ParsedShader shader, string? name = null, Dictionary<string,string>? defines = null);

        void ReloadShader(ClydeHandle handle, ParsedShader newShader);

        /// <summary>
        ///     Creates a new instance of a shader.
        /// </summary>
        ShaderInstance InstanceShader(ShaderSourceResource handle, bool? light = null, ShaderBlendMode? blend = null);

        /// <summary>
        ///     This is purely a hook for <see cref="IInputManager"/>, use that instead.
        /// </summary>
        ScreenCoordinates MouseScreenPosition { get; }

        IClydeDebugInfo DebugInfo { get; }

        IClydeDebugStats DebugStats { get; }

        Texture GetStockTexture(ClydeStockTexture stockTexture);
        IEnumerable<(Clyde.Clyde.ClydeTexture, Clyde.Clyde.LoadedTexture)> GetLoadedTextures();
        IEnumerable<(Clyde.Clyde.RenderTargetBase, Clyde.Clyde.LoadedRenderTarget)> GetLoadedRenderTextures();

        ClydeDebugLayers DebugLayers { get; set; }

        string GetKeyName(Keyboard.Key key);

        void Shutdown();

        /// <returns>Null if not running on X11.</returns>
        uint? GetX11WindowId();

        void RegisterGridEcsEvents();

        void ShutdownGridEcsEvents();

        void RunOnWindowThread(Action action);

        IFileDialogManagerImplementation? FileDialogImpl { get; }

        bool VsyncEnabled { get; set; }

        // Viewports

#if TOOLS

        /// <summary>
        /// Fires <see cref="IClydeViewport.ClearCachedResources"/> on all viewports. For debugging.
        /// </summary>
        void ViewportsClearAllCached();

#endif // TOOLS

        void RenderNow(IRenderTarget renderTarget, Action<IRenderHandle> callback);
    }
}