#include "Render/DeviceContext/DeviceContext.h"
#include "Resource/Bitmap/BitmapResource.h"
#include "Resource/ResourceMgr.h"
#include "UI/Lists/UIScrollBarNavi.h"

// INLINED
UIScrollBar_Navi::UIScrollBar_Navi(UIWindowContext& windows) : UIScrollBar(windows) {
  this->arrowLength = 7;
  this->thickness = 7;
}

// OFFSET: 0x00874080
UIScrollBar_Navi::~UIScrollBar_Navi() = default;

// OFFSET: 0x0088E930
// FUNCTION: fn_11383
void UIScrollBar_Navi::Paint() {
  this->geometry.surface->Fill(nullptr, 0xFFFF00FFu);

  if (this->maximum == 0) {
    return;
  }

  if (this->vertical == 1) {
    constexpr char prefix[] = "유저인터페이스\\navigation_interface3\\";
    const auto load = [&](const char* name) { return static_cast<CBitmapRes*>(ResourceMgr::Instance().Load((std::string(prefix) + name).c_str())); };
    const auto draw = [&](CBitmapRes* image, int y, bool transparent) { this->DrawBitmap(0, y, image ? &image->image : nullptr, transparent); };
    auto* up = load("Navi_scroll_up.bmp");
    auto* middle = load("Navi_scroll_mid.bmp");
    auto* down = load("Navi_scroll_down.bmp");
    const int interior = (this->geometry.height - (2 * this->arrowLength));
    const int count = interior / this->arrowLength + (interior % this->arrowLength > 0);

    for (int index = 1; index <= count; ++index) {
      draw(middle, (index * this->arrowLength), false);
    }

    draw(up, 0, false);
    draw(down, (this->geometry.height - this->arrowLength), false);
    auto* thumbUp = load("Navi_bar_up.bmp");
    auto* thumbMiddle = load("Navi_bar_mid.bmp");
    auto* thumbDown = load("Navi_bar_down.bmp");
    const int thumb = (this->arrowLength + ((interior - this->ThumbLength()) * this->position) / this->maximum);
    draw(thumbUp, thumb, true);
    const int end = ((thumb + thumbUp->image.height) + this->ThumbLength());

    for (int y = (thumb + thumbUp->image.height); y < end; y = (y + thumbDown->image.height)) {
      draw(thumbDown, y, true);
    }

    draw(thumbMiddle, end, true);
  }

  this->minimumThumb = 0;
  this->parent->Invalidate();
}