/*
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:
        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;
        Transform(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 WindowFramebuffer;
    class UiElement {
    public:
        Transform transform;
        std::vector<UiElement*> children;

        UiElement(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);
        UiElement(UiElement&) = delete;
        UiElement& operator=(UiElement&) = delete;
        void UpdatePosition(WindowFramebuffer& window);
        void UpdatePosition(WindowFramebuffer& window, UiElement& parent);
    };

    class UiElementMouse {
    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;
        UiElementMouse(std::int_fast32_t anchorX = FractionalToMapped(0), std::int_fast32_t anchorY = FractionalToMapped(0), std::uint_fast32_t relativeWidth = FractionalToMapped(1), std::uint_fast32_t relativeHeight = FractionalToMapped(1), std::int_fast32_t anchorOffsetX = FractionalToMapped(0), std::int_fast32_t anchorOffsetY = FractionalToMapped(0), std::int_fast32_t z = 0, bool ignoreScaling = false);
    };

    class UiElementBuffer {
    public:
        std::uint_fast32_t width;
        std::uint_fast32_t height;
        UiElementBuffer() = default;
        UiElementBuffer(std::uint_fast32_t width, std::uint_fast32_t height);
        virtual void Create(std::uint_fast32_t width, std::uint_fast32_t height) = 0;
        virtual void Resize(std::uint_fast32_t width, std::uint_fast32_t height) = 0;
        virtual void Resize(std::uint_fast32_t width, std::uint_fast32_t height, std::uint_fast32_t offsetX, std::uint_fast32_t offsetY) = 0;
        virtual void ResizeNearestNeighbour(std::uint_fast32_t width, std::uint_fast32_t height) = 0;
        virtual void ResizeBicubic(std::uint_fast32_t width, std::uint_fast32_t height) = 0;
        virtual void Destroy() = 0;
        virtual void Copy(Pixel_BU8_GU8_RU8_AU8* dst) const = 0;
        virtual void CopyNearestNeighbour(Pixel_BU8_GU8_RU8_AU8* dst, std::uint_fast32_t dstWidth, std::uint_fast32_t dstHeight) const = 0;
        virtual void CopyBicubic(Pixel_BU8_GU8_RU8_AU8* dst, std::uint_fast32_t dstWidth, std::uint_fast32_t dstHeight) const = 0;
        virtual void Write(Pixel_BU8_GU8_RU8_AU8* pixels) = 0;
        virtual void Write(std::uint_fast32_t x, std::uint_fast32_t y, Pixel_BU8_GU8_RU8_AU8 pixel) = 0;
        virtual Pixel_BU8_GU8_RU8_AU8 Read(std::uint_fast32_t x, std::uint_fast32_t y) const = 0;
        virtual const Pixel_BU8_GU8_RU8_AU8* Read() const = 0;
        virtual Pixel_BU8_GU8_RU8_AU8* Get() = 0;
        virtual void Store() = 0;
    };

    class UiElementBufferBufferBase : public UiElementBuffer {
        public:
        std::vector<Pixel_BU8_GU8_RU8_AU8> buffer;
        UiElementBufferBufferBase() = default;
        UiElementBufferBufferBase(std::uint_fast32_t width, std::uint_fast32_t height);
        void Create(std::uint_fast32_t width, std::uint_fast32_t height) override;
        void Resize(std::uint_fast32_t width, std::uint_fast32_t height) override;
        void Resize(std::uint_fast32_t width, std::uint_fast32_t height, std::uint_fast32_t offsetX, std::uint_fast32_t offsetY) override;
        void ResizeNearestNeighbour(std::uint_fast32_t width, std::uint_fast32_t height) override;
        void ResizeBicubic(std::uint_fast32_t width, std::uint_fast32_t height) override;
        void Destroy() override;
        void Copy(Pixel_BU8_GU8_RU8_AU8* dst) const override;
        void CopyNearestNeighbour(Pixel_BU8_GU8_RU8_AU8* dst, std::uint_fast32_t dstWidth, std::uint_fast32_t dstHeight) const override;
        void CopyBicubic(Pixel_BU8_GU8_RU8_AU8* dst, std::uint_fast32_t dstWidth, std::uint_fast32_t dstHeight) const override;
        void Write(Pixel_BU8_GU8_RU8_AU8* pixels) override;
        void Write(std::uint_fast32_t x, std::uint_fast32_t y, Pixel_BU8_GU8_RU8_AU8 pixel) override;
        Pixel_BU8_GU8_RU8_AU8 Read(std::uint_fast32_t x, std::uint_fast32_t y) const override;
        const Pixel_BU8_GU8_RU8_AU8* Read() const override;
        Pixel_BU8_GU8_RU8_AU8* Get() override;
        void Store() override;
    };

    class UiElementBufferBuffer : public UiElement, public UiElementBufferBufferBase {
        public:
        UiElementBufferBuffer(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);
        UiElementBufferBuffer(std::uint_fast32_t width, std::uint_fast32_t height, 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 UiElementBufferMouseBuffer : public UiElementBufferBuffer, public UiElementMouse {
        public:
        UiElementBufferMouseBuffer(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);
        UiElementBufferMouseBuffer(std::uint_fast32_t width, std::uint_fast32_t height, 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);
    };
}