/*
Crafter®.Graphics
Copyright (C) 2025 Catcrafts®
catcrafts.net

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 3.0 as published by the Free Software Foundation;

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
*/

export module Crafter.Graphics:UiElement;
import std;
import Crafter.Event;
import :Types;

export namespace Crafter {
    class Transform {
        public:
        void* element;
        std::int_fast32_t z;
        std::int_fast32_t anchorX;
        std::int_fast32_t anchorY;
        std::int_fast32_t anchorOffsetX;
        std::int_fast32_t anchorOffsetY;
        std::uint_fast32_t relativeWidth;
        std::uint_fast32_t relativeHeight;
        bool ignoreScaling;
        ScaleData scaled;
        std::vector<Transform*> children;
        Transform(void* element, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX = FractionalToMapped(0.5), std::int_fast32_t anchorOffsetY = FractionalToMapped(0.5), std::int_fast32_t z = 0, bool ignoreScaling = false);
    };

    class Window;
    class Font;
    
    // Base class for rendering elements
    class RenderingElement {
    public:
        Transform transform;
        std::vector<Pixel_BU8_GU8_RU8_AU8> buffer;
        std::vector<Pixel_BU8_GU8_RU8_AU8> scaled;
        std::uint_fast32_t bufferWidth;
        std::uint_fast32_t bufferHeight;
        
        RenderingElement(Transform transform);
        RenderingElement(Transform transform, std::uint_fast32_t bufferWidth, std::uint_fast32_t bufferHeight);
        RenderingElement(std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX = FractionalToMapped(0.5), std::int_fast32_t anchorOffsetY = FractionalToMapped(0.5), std::int_fast32_t z = 0, bool ignoreScaling = false);
        RenderingElement(std::uint_fast32_t bufferWidth, std::uint_fast32_t bufferHeight, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX = FractionalToMapped(0.5), std::int_fast32_t anchorOffsetY = FractionalToMapped(0.5), std::int_fast32_t z = 0, bool ignoreScaling = false);
        RenderingElement(const std::string_view imagePath, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX = FractionalToMapped(0.5), std::int_fast32_t anchorOffsetY = FractionalToMapped(0.5), std::int_fast32_t z = 0, bool ignoreScaling = false);
        RenderingElement(const std::string_view text, float size, Pixel_BU8_GU8_RU8_AU8 pixel, Font& font, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX = FractionalToMapped(0.5), std::int_fast32_t anchorOffsetY = FractionalToMapped(0.5), std::int_fast32_t z = 0, bool ignoreScaling = false);
        RenderingElement(RenderingElement&) = delete;
        RenderingElement& operator=(RenderingElement&) = delete;
        
        void ResizeBuffer(std::uint_fast32_t width, std::uint_fast32_t height);
        void CopyNearestNeighbour(Pixel_BU8_GU8_RU8_AU8* dst, std::uint_fast32_t dstWidth, std::uint_fast32_t dstHeight) const;
        void RenderText(const std::string_view text, float size, Pixel_BU8_GU8_RU8_AU8 pixel, Font& font);
        void RenderImage(const std::string_view path);
        void UpdatePosition(Window& window);
        void UpdatePosition(Window& window, Transform& parent);
    };

    // Base class for Mouse elements
    class MouseElement {
    public:
        Transform transform;
        Event<MouseMoveEvent> onMouseMove;
        Event<MouseMoveEvent> onMouseEnter;
        Event<MouseMoveEvent> onMouseLeave;
        Event<MousePoint> onMouseRightClick;
        Event<MousePoint> onMouseLeftClick;
        Event<MousePoint> onMouseRightHold;
        Event<MousePoint> onMouseLeftHold;
        Event<MousePoint> onMouseRightRelease;
        Event<MousePoint> onMouseLeftRelease;
        
        MouseElement(std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX = FractionalToMapped(0.5), std::int_fast32_t anchorOffsetY = FractionalToMapped(0.5), std::int_fast32_t z = 0, bool ignoreScaling = false);
        MouseElement(Transform transform);
        MouseElement(MouseElement&) = delete;
        MouseElement& operator=(MouseElement&) = delete;
        void UpdatePosition(Window& window);
        void UpdatePosition(Window& window, Transform& parent);
    };

    // Combined UI element that can have both rendering and interaction
    class RenderingMouseElement {
    public:
        RenderingElement rendering;
        MouseElement mouse;
        RenderingMouseElement(const std::string_view imagePath, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX = FractionalToMapped(0.5), std::int_fast32_t anchorOffsetY = FractionalToMapped(0.5), std::int_fast32_t z = 0, bool ignoreScaling = false);
        RenderingMouseElement(const std::string_view text, float size, Pixel_BU8_GU8_RU8_AU8 pixel, Font& font, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX = FractionalToMapped(0.5), std::int_fast32_t anchorOffsetY = FractionalToMapped(0.5), std::int_fast32_t z = 0, bool ignoreScaling = false);
        RenderingMouseElement(std::uint_fast32_t bufferWidth, std::uint_fast32_t bufferHeight, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX = FractionalToMapped(0.5), std::int_fast32_t anchorOffsetY = FractionalToMapped(0.5), std::int_fast32_t z = 0, bool ignoreScaling = false);
        RenderingMouseElement(std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX = FractionalToMapped(0.5), std::int_fast32_t anchorOffsetY = FractionalToMapped(0.5), std::int_fast32_t z = 0, bool ignoreScaling = false);
        RenderingMouseElement(Transform transform, Transform mouseTransform);
        RenderingMouseElement(RenderingMouseElement&) = delete;
        RenderingMouseElement& operator=(RenderingMouseElement&) = delete;
        void UpdatePosition(Window& window);
        void UpdatePosition(Window& window, Transform& parent);
    };
}