/*
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:RenderingElement;
import std;
import :Transform;
import :Types;

export namespace Crafter {
    enum class OpaqueType {
        FullyOpaque,      // All pixels have A of 255
        SemiOpaque,       // All pixels have A of 0 or 255 (no blending needed)
        Transparent       // Color blending is used
    };
    
    class Window;
    class RenderingElement : public Transform {
    public:
        std::vector<Pixel_BU8_GU8_RU8_AU8> bufferScaled;
        OpaqueType opaque = OpaqueType::Transparent;
        
        RenderingElement(OpaqueType opaque = OpaqueType::Transparent);
        RenderingElement(OpaqueType opaque, 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, std::int_fast32_t anchorOffsetY, std::int_fast32_t z, bool ignoreScaling);
        RenderingElement(RenderingElement&) = delete;
        RenderingElement& operator=(RenderingElement&) = delete;
    };

    class RenderingElementPreScaled : public RenderingElement {
    public:        
        RenderingElementPreScaled(OpaqueType opaque = OpaqueType::Transparent);
        RenderingElementPreScaled(OpaqueType opaque, 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, std::int_fast32_t anchorOffsetY, std::int_fast32_t z, bool ignoreScaling);
        RenderingElementPreScaled(RenderingElementPreScaled&) = delete;
        RenderingElementPreScaled& operator=(RenderingElementPreScaled&) = delete;
        
        void CopyNearestNeighbour(Pixel_BU8_GU8_RU8_AU8* dst, std::uint_fast32_t dstWidth, std::uint_fast32_t dstHeight) const;
        void UpdatePosition(Window& window) override;
        void UpdatePosition(Window& window, Transform& parent) override;
    };

    class RenderingElementScaling: public RenderingElement {
    public:
        std::vector<Pixel_BU8_GU8_RU8_AU8> buffer;
        std::uint_fast32_t bufferWidth;
        std::uint_fast32_t bufferHeight;
        
        RenderingElementScaling(OpaqueType opaque = OpaqueType::Transparent);
        RenderingElementScaling(OpaqueType opaque, 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, std::int_fast32_t anchorOffsetY, std::int_fast32_t z, bool ignoreScaling);
        RenderingElementScaling(OpaqueType opaque, std::uint_fast32_t bufferWidth, std::uint_fast32_t bufferHeight, std::int_fast32_t anchorX = FractionalToMapped(0.5), std::int_fast32_t anchorY = FractionalToMapped(0.5), std::uint_fast32_t relativeWidth = FractionalToMapped(1), std::uint_fast32_t relativeHeight = FractionalToMapped(1), 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);
        RenderingElementScaling(RenderingElementScaling&) = delete;
        RenderingElementScaling& operator=(RenderingElementScaling&) = 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 UpdatePosition(Window& window) override;
        void UpdatePosition(Window& window, Transform& parent) override;
    };
}