NXKit/UIKitCore/include/CATextLayer.h

#pragma once

#include <CALayer.h>
#include <SkiaCtx.h>
#include <include/core/SkFont.h>
#include <include/core/SkTypeface.h>
#include <modules/skparagraph/include/Paragraph.h>
#include <modules/skparagraph/include/ParagraphBuilder.h>

namespace NXKit {

enum class NSTextAlignment {
    left,
    right,
    center,
    justified,
    natural
};

class CATextLayer: public CALayer {
public:
    CATextLayer();
    CATextLayer(CATextLayer* layer);
    virtual ~CATextLayer() = default;

    void draw(SkCanvas* context) override;
    std::shared_ptr<CALayer> copy() override;

    void setText(const std::string& text);
    [[nodiscard]] std::string text() const { return _text; }

    void setFontSize(NXFloat fontSize);
    [[nodiscard]] NXFloat fontSize() const { return _fontSize; }

    void setFontWeight(NXFloat fontWeight);
    [[nodiscard]] NXFloat fontWeight() const { return _fontWeight; }

    void setTextColor(const UIColor& textColor);
    [[nodiscard]] UIColor textColor() const { return _textColor; }

    void setTextAlignment(NSTextAlignment textAlignment);
    [[nodiscard]] NSTextAlignment textAlignment() const { return _textAlignment; }

    std::optional<AnimatableProperty> value(std::string forKeyPath) override;

    NXSize sizeThatFits(NXSize size);
protected:
    void update(std::shared_ptr<CALayer> presentation, std::shared_ptr<CABasicAnimation> animation, float progress) override;

private:
    NXFloat _fontSize = 17;
    NXFloat _fontWeight = SkFontStyle::kNormal_Weight;
    NSTextAlignment _textAlignment = NSTextAlignment::left;
    std::string _text = "Furthermore, العربية نص جميل. द क्विक ब्राउन फ़ॉक्स jumps over the lazy 🐕.";
    UIColor _textColor = UIColor::black;

    // Skia
//    sk_sp<SkTypeface> typeface;
//    skia::textlayout::ParagraphStyle paraStyle;
//    sk_sp<skia::textlayout::FontCollection> fontCollection;
    sk_sp<SkUnicode> unicode;
    std::unique_ptr<skia::textlayout::Paragraph> paragraph;

    void updateParagraph();
};

}