#include "cru/ui/controls/button.hpp"
#include <memory>

#include "cru/platform/graph/brush.hpp"
#include "cru/platform/graph/graph_factory.hpp"
#include "cru/platform/native/cursor.hpp"
#include "cru/platform/native/native_window.hpp"
#include "cru/platform/native/ui_applicaition.hpp"
#include "cru/ui/render/border_render_object.hpp"
#include "cru/ui/ui_manager.hpp"
#include "cru/ui/window.hpp"

namespace cru::ui::controls {
using platform::native::SystemCursor;
using platform::native::UiApplication;

Button::Button() : click_detector_(this) {
  // const auto predefined_resource =
  //    UiManager::GetInstance()->GetPredefineResources();

  const auto factory = platform::graph::GraphFactory::GetInstance();
  border_style_.normal.brush = std::shared_ptr<platform::graph::Brush>(
      factory->CreateSolidColorBrush(Color::FromHex(0x00bfff)));
  border_style_.hover.brush = std::shared_ptr<platform::graph::Brush>(
      factory->CreateSolidColorBrush(Color::FromHex(0x47d1ff)));
  border_style_.press.brush = std::shared_ptr<platform::graph::Brush>(
      factory->CreateSolidColorBrush(Color::FromHex(0x91e4ff)));

  border_style_.normal.thickness = border_style_.hover.thickness =
      border_style_.press.thickness = Thickness{3};

  border_style_.normal.corner_radius = border_style_.hover.corner_radius =
      border_style_.press.corner_radius = render::CornerRadius{Point{10, 5}};

  render_object_.reset(
      new render::BorderRenderObject(border_style_.normal.brush));
  render_object_->SetAttachedControl(this);
  render_object_->SetEnabled(true);
  render_object_->SetStyle(border_style_.normal);

  MouseEnterEvent()->Direct()->AddHandler([this](event::MouseEventArgs& args) {
    if (click_detector_.GetPressingButton() & trigger_button_) {
      SetState(ButtonState::Press);
    } else {
      SetState(ButtonState::Hover);
    }
    SetCursor(UiApplication::GetInstance()->GetCursorManager()->GetSystemCursor(
        SystemCursor::Hand));
  });

  MouseLeaveEvent()->Direct()->AddHandler([this](event::MouseEventArgs& args) {
    SetState(ButtonState::Normal);
    SetCursor(UiApplication::GetInstance()->GetCursorManager()->GetSystemCursor(
        SystemCursor::Arrow));
  });

  click_detector_.ClickBeginEvent()->AddHandler([this](MouseButton button) {
    if (button & trigger_button_) {
      SetState(ButtonState::Press);
    }
  });

  click_detector_.ClickEndEvent()->AddHandler([this](MouseButton button) {
    if (button & trigger_button_) {
      SetState(ButtonState::Normal);
    }
  });
}

render::RenderObject* Button::GetRenderObject() const {
  return render_object_.get();
}

void Button::OnChildChanged(Control* old_child, Control* new_child) {
  if (old_child != nullptr) render_object_->RemoveChild(0);
  if (new_child != nullptr)
    render_object_->AddChild(new_child->GetRenderObject(), 0);
}

void Button::OnStateChange(ButtonState oldState, ButtonState newState) {
  switch (newState) {
    case ButtonState::Normal:
      render_object_->SetStyle(border_style_.normal);
      break;
    case ButtonState::Hover:
      render_object_->SetStyle(border_style_.hover);
      break;
    case ButtonState::Press:
      render_object_->SetStyle(border_style_.press);
      break;
  }
  GetWindow()->GetNativeWindow()->Repaint();
}
}  // namespace cru::ui::controls