#include "CGuiObject.hpp"
#include "CGuiWidgetDrawParms.hpp"
#include "Graphics/CTexture.hpp"
#include "CGuiWidget.hpp"
#include "CGuiFrame.hpp"

namespace urde {

void CGuiObject::Update(float dt) {
  if (x68_child)
    x68_child->Update(dt);
  if (x6c_nextSibling)
    x6c_nextSibling->Update(dt);
}

void CGuiObject::Draw(const CGuiWidgetDrawParms& parms) const {
  if (x68_child)
    x68_child->Draw(parms);
  if (x6c_nextSibling)
    x6c_nextSibling->Draw(parms);
}

void CGuiObject::MoveInWorld(const zeus::CVector3f& vec) {
  //if (x64_parent)
  //  x64_parent->RotateW2O(vec);
  x4_localXF.origin += vec;
  RecalculateTransforms();
}

void CGuiObject::SetLocalPosition(const zeus::CVector3f& pos) { MoveInWorld(pos - x4_localXF.origin); }

void CGuiObject::RotateReset() {
  x4_localXF.basis = zeus::CMatrix3f();
  RecalculateTransforms();
}

zeus::CVector3f CGuiObject::RotateW2O(const zeus::CVector3f& vec) const { return x34_worldXF.transposeRotate(vec); }

zeus::CVector3f CGuiObject::RotateO2P(const zeus::CVector3f& vec) const { return x4_localXF.rotate(vec); }

zeus::CVector3f CGuiObject::RotateTranslateW2O(const zeus::CVector3f& vec) const {
  return x34_worldXF.transposeRotate(vec - x34_worldXF.origin);
}

void CGuiObject::MultiplyO2P(const zeus::CTransform& xf) {
  x4_localXF = xf * x4_localXF;
  RecalculateTransforms();
}

void CGuiObject::AddChildObject(CGuiObject* obj, bool makeWorldLocal, bool atEnd) {
  obj->x64_parent = this;

  if (!x68_child) {
    x68_child = obj;
  } else if (atEnd) {
    CGuiObject* prev = nullptr;
    CGuiObject* cur = x68_child;
    for (; cur; cur = cur->x6c_nextSibling) {
      prev = cur;
    }
    if (prev)
      prev->x6c_nextSibling = obj;
  } else {
    obj->x6c_nextSibling = x68_child;
    x68_child = obj;
  }

  if (makeWorldLocal) {
    zeus::CVector3f negParentWorld = -x34_worldXF.origin;
    zeus::CMatrix3f basisMat(x34_worldXF.basis[0] / x34_worldXF.basis[0].magnitude(),
                             x34_worldXF.basis[1] / x34_worldXF.basis[1].magnitude(),
                             x34_worldXF.basis[2] / x34_worldXF.basis[2].magnitude());
    zeus::CVector3f xfWorld = basisMat * negParentWorld;
    obj->x4_localXF = zeus::CTransform(basisMat, xfWorld) * obj->x34_worldXF;
  }

  RecalculateTransforms();
}

CGuiObject* CGuiObject::RemoveChildObject(CGuiObject* obj, bool makeWorldLocal) {
  CGuiObject* prev = nullptr;
  CGuiObject* cur = x68_child;
  for (; cur && cur != obj; cur = cur->x6c_nextSibling) {
    prev = cur;
  }
  if (!cur)
    return nullptr;
  if (prev)
    prev->x6c_nextSibling = cur->x6c_nextSibling;
  cur->x6c_nextSibling = nullptr;
  cur->x64_parent = nullptr;

  if (makeWorldLocal)
    cur->x4_localXF = cur->x34_worldXF;
  cur->RecalculateTransforms();

  return cur;
}

void CGuiObject::RecalculateTransforms() {
  if (x64_parent)
    x34_worldXF = x64_parent->x34_worldXF * x4_localXF;
  else
    x34_worldXF = x4_localXF;

  if (x6c_nextSibling)
    x6c_nextSibling->RecalculateTransforms();
  if (x68_child)
    x68_child->RecalculateTransforms();
}

void CGuiObject::SetO2WTransform(const zeus::CTransform& xf) {
  x4_localXF = GetParent()->x34_worldXF.inverse() * xf;
  RecalculateTransforms();
}

void CGuiObject::SetLocalTransform(const zeus::CTransform& xf) {
  x4_localXF = xf;
  RecalculateTransforms();
}

} // namespace urde