#include "Label.h"
#include <algorithm>

namespace UI {

Label::Label(const std::string& label) : label(label) {
    focusable = true;
    padding = Thickness(0.0f, 0.0f);
    minSize = Size(0.0f, 0.0f);
    horizontalAlignment = HorizontalAlignment::Left;
}

void Label::SetLabel(const std::string& newLabel) {
    label = newLabel;
    MarkDirty(DirtyFlags::Layout | DirtyFlags::Render);
}

void Label::RefreshPrimitives() {
    UI::Size textSize = Text::Measure(label);
    float contentH = std::max(0.0f, globalBounds.Height - padding.VerticalTotal());
    float textX = globalBounds.X + padding.Left;
    float textY = globalBounds.Y + padding.Top + std::max(0.0f, (contentH - textSize.height) * 0.5f);
    labelText = std::make_unique<Text>(textX, textY, label);
    labelText->SetColor(textColor.r, textColor.g, textColor.b, textColor.a);
}

void Label::Measure(Size /*availableSpace*/) {
    UI::Size textSize = Text::Measure(label);
    
    desiredSize.width = std::clamp(textSize.width + padding.HorizontalTotal() + margin.HorizontalTotal(), minSize.width, maxSize.width);
    desiredSize.height = std::clamp(textSize.height + padding.VerticalTotal() + margin.VerticalTotal(), minSize.height, maxSize.height);
}

void Label::Arrange(Rect finalBounds) {
    Rect oldGlobal = globalBounds;
    bool doWeRefreshMaybe = IsDirty(DirtyFlags::Render | DirtyFlags::Layout);
    Widget::Arrange(finalBounds);

    if (doWeRefreshMaybe || globalBounds != oldGlobal) {
        RefreshPrimitives();
    }
}


void Label::Draw() {
    if (!visible) return;

    if (!labelText || IsDirty(DirtyFlags::Layout)) {
        RefreshPrimitives();
    }

    if (labelText) {
        labelText->Render();
    }

    Widget::Draw();
}

}