#include "DebugOverlay.h"
#include <cmath>
#include <string>
#include "../Version.h"

DebugOverlay::DebugOverlay() {
    SetPadding(UI::Thickness(0.0f));
    SetMargin(UI::Thickness(0.0f));
    SetHorizontalAlignment(UI::HorizontalAlignment::Center);
    SetVerticalAlignment(UI::VerticalAlignment::Top);
    std::string systemText = VERSION_STRING;
    fpsText = std::make_unique<Text>(0.0, 0.0, fps);
    fpsText->SetColor(1.0, 1.0, 1.0, 1.0);
}

void DebugOverlay::SetFps(double value) {
    const std::string newFps = std::to_string(static_cast<int>(std::lround(value)));
    if (fps == newFps) {
        return;
    }
    fps = newFps;
    fpsText->SetText(fps);
    MarkDirty(UI::DirtyFlags::Layout | UI::DirtyFlags::Render);
}

void DebugOverlay::Measure(UI::Size /*availableSpace*/) {
    const UI::Size textSize = Text::Measure(fps);
    desiredSize = textSize;
}

void DebugOverlay::RefreshPrimitives() {
    const UI::Size textSize = Text::Measure(fps);
    fpsText->SetPosition(globalBounds.X, globalBounds.Y);
    marker = std::make_unique<Rectangle>(globalBounds.X, globalBounds.Y, textSize.width, textSize.height);
    marker->SetColor(0.21, 0.21, 0.21, 1.0);
}

void DebugOverlay::Arrange(UI::Rect finalBounds) {
    const UI::Rect oldBounds = globalBounds;
    const bool refresh = IsDirty(UI::DirtyFlags::Layout | UI::DirtyFlags::Render);
    ArrangeCore(finalBounds);
    if (refresh || globalBounds != oldBounds) {
        RefreshPrimitives();
    }
    ClearDirty(UI::DirtyFlags::Layout);
}

void DebugOverlay::Draw() {
    if (!visible) {
        return;
    }
    if (!marker || IsDirty(UI::DirtyFlags::Layout)) {
        RefreshPrimitives();
    }
    marker->Render();
    fpsText->Render();
    ClearDirty(UI::DirtyFlags::Render);
}