#include "Runtime/Graphics/CCubeModel.hpp"
#include "Runtime/Graphics/CGraphics.hpp"
#include "Runtime/CSimplePool.hpp"

// TODO Remove WIP once we've transitioned to this
namespace metaforce::WIP {
#pragma region CModel
u32 CModel::sTotalMemory = 0;
u32 CModel::sFrameCounter = 0;
bool CModel::sIsTextureTimeoutEnabled = true;
CModel* CModel::sThisFrameList = nullptr;
CModel* CModel::sOneFrameList = nullptr;
CModel* CModel::sTwoFrameList = nullptr;

static u8* MemoryFromPartData(u8*& dataCur, const u32*& secSizeCur) {
  u8* ret = nullptr;
  if (*secSizeCur != 0) {
    ret = dataCur;
  }
  dataCur += hecl::SBig(*secSizeCur);
  ++secSizeCur;
  return ret;
}

CModel::CModel(std::unique_ptr<u8[]> in, u32 dataLen, IObjectStore* store)
: x0_data(std::move(in))
, x4_dataLen(dataLen)
, x34_next(sThisFrameList)
, x38_lastFrame(CGraphics::GetFrameCounter() - 2) {
  u8* data = x0_data.get();
  u32 flags = hecl::SBig(*reinterpret_cast<u32*>(data + 8));
  u32 sectionSizeStart = 0x2c;
  if (hecl::SBig(*reinterpret_cast<u32*>(data + 4)) == 1) {
    sectionSizeStart = 0x28;
  }
  const u32* secSizeCur = reinterpret_cast<u32*>(data + sectionSizeStart);
  s32 numMatSets = 1;
  if (hecl::SBig(*reinterpret_cast<u32*>(data + 4)) > 1) {
    numMatSets = hecl::SBig(*reinterpret_cast<s32*>(data + 0x28));
  }
  u8* dataCur = data + ROUND_UP_32(sectionSizeStart + hecl::SBig(*reinterpret_cast<s32*>(data + 0x24)) * 4);
  x18_matSets.reserve(numMatSets);
  for (s32 i = 0; i < numMatSets; ++i) {
    x18_matSets.emplace_back(static_cast<u8*>(MemoryFromPartData(dataCur, secSizeCur)));
    auto& shader = x18_matSets.back();
    CCubeModel::MakeTexturesFromMats(shader.x10_data, shader.x0_textures, store, true);
    x4_dataLen += shader.x0_textures.size() * sizeof(TCachedToken<CTexture>);
  }

  /* Metaforce note: Due to padding in zeus types we need to convert these and store locally */
  u32 numVertices = hecl::SBig(*secSizeCur) / (sizeof(float) * 3);
  const u8* positions = MemoryFromPartData(dataCur, secSizeCur);
  for (u32 i = 0; i < numVertices; ++i) {
    const auto* pos = reinterpret_cast<const float*>(positions + (i * (sizeof(float) * 3)));
    m_positions.emplace_back(hecl::SBig(pos[0]), hecl::SBig(pos[1]), hecl::SBig(pos[2]));
  }
  u32 numNormals = hecl::SBig(*secSizeCur);
  numNormals /= ((flags & 2) == 0 ? sizeof(float) : sizeof(s16)) * 3;
  const u8* normals = MemoryFromPartData(dataCur, secSizeCur);

  for (u32 i = 0; i < numNormals; ++i) {
    if ((flags & 2) == 0) {
      const auto* norm = reinterpret_cast<const float*>(normals + (i * (sizeof(float) * 3)));
      m_normals.emplace_back(hecl::SBig(norm[0]), hecl::SBig(norm[1]), hecl::SBig(norm[2]));
    } else {
      const auto* norm = reinterpret_cast<const s16*>(normals + (i * (sizeof(s16) * 3)));
      m_normals.emplace_back(hecl::SBig(norm[0]) / 32767.f, hecl::SBig(norm[1]) / 32767.f,
                             hecl::SBig(norm[2]) / 32767.f);
    }
  }
  u32 numColors = hecl::SBig(*secSizeCur) / (sizeof(int));
  const u8* vtxColors = MemoryFromPartData(dataCur, secSizeCur);

  for (u32 i = 0; i < numColors; ++i) {
    const u32 col = hecl::SBig(*reinterpret_cast<const u32*>(vtxColors + (i * (sizeof(u32)))));
    m_colors.emplace_back(zeus::CColor(zeus::Comp32(col)));
  }

  u32 numFloatUVs = hecl::SBig(*reinterpret_cast<const u32*>(secSizeCur)) / (sizeof(float) * 2);
  const u8* floatUVs = MemoryFromPartData(dataCur, secSizeCur);

  for (u32 i = 0; i < numFloatUVs; ++i) {
    const auto* norm = reinterpret_cast<const float*>(floatUVs + (i * (sizeof(float) * 2)));
    m_floatUVs.emplace_back(hecl::SBig(norm[0]), hecl::SBig(norm[1]));
  }

  if ((flags & 4) != 0) {
    u32 numShortUVs = hecl::SBig(*reinterpret_cast<const u32*>(secSizeCur)) / (sizeof(s16) * 2);
    const u8* shortUVs = MemoryFromPartData(dataCur, secSizeCur);

    for (u32 i = 0; i < numShortUVs; ++i) {
      const auto* norm = reinterpret_cast<const s16*>(shortUVs + (i * (sizeof(s16) * 2)));
      m_shortUVs.emplace_back(std::array{hecl::SBig(norm[0]), hecl::SBig(norm[1])});
    }
  }

  const u8* surfaceInfo = MemoryFromPartData(dataCur, secSizeCur);
  u32 surfaceCount = hecl::SBig(*reinterpret_cast<const u32*>(surfaceInfo));
  x8_surfaces.reserve(surfaceCount);

  for (u32 i = 0; i < surfaceCount; ++i) {
    if (x8_surfaces.capacity() <= x8_surfaces.size()) {
      x8_surfaces.reserve(x8_surfaces.capacity() * 2);
    }

    x8_surfaces.emplace_back(std::make_unique<CCubeSurface>(MemoryFromPartData(dataCur, secSizeCur)));
  }

  const float* bounds = reinterpret_cast<float*>(data + 12);
  zeus::CAABox aabox = zeus::skNullBox;
  aabox.min = {hecl::SBig(bounds[0]), hecl::SBig(bounds[1]), hecl::SBig(bounds[2])};
  aabox.max = {hecl::SBig(bounds[3]), hecl::SBig(bounds[4]), hecl::SBig(bounds[5])};

  /* This constructor has been changed from the original to take into account platform differences */
  x28_modelInst =
      std::make_unique<CCubeModel>(&x8_surfaces, &x18_matSets[0].x0_textures, x18_matSets[0].x10_data, &m_positions,
                                   &m_colors, &m_normals, &m_floatUVs, &m_shortUVs, aabox, flags, true, -1);

  sThisFrameList = this;
  if (x34_next != nullptr) {
    x34_next->x30_prev = this;
  }
  x4_dataLen += x8_surfaces.size() * 4;
  sTotalMemory += x4_dataLen;
  // DCFlushRange(x0_data, dataLen);
}

void CModel::UpdateLastFrame() { x38_lastFrame = CGraphics::GetFrameCounter(); }
void CModel::MoveToThisFrameList() {
  UpdateLastFrame();
  if (sThisFrameList == this) {
    return;
  }

  RemoveFromList();
  if (sThisFrameList != nullptr) {
    x34_next = sThisFrameList;
    x34_next->x30_prev = this;
  }

  sThisFrameList = this;
}

void CModel::RemoveFromList() {
  if (x30_prev == nullptr) {
    if (sThisFrameList == this) {
      sThisFrameList = x34_next;
    } else if (sOneFrameList == this) {
      sOneFrameList = x34_next;
    } else if (sTwoFrameList == this) {
      sTwoFrameList = x34_next;
    }
  } else {
    x30_prev->x34_next = x34_next;
  }
  if (x34_next != nullptr) {
    x34_next->x30_prev = x30_prev;
  }
  x30_prev = nullptr;
  x34_next = nullptr;
}

void CModel::FrameDone() {
  ++sFrameCounter;
  if (sIsTextureTimeoutEnabled) {
    auto* iter = sTwoFrameList;
    while (iter != nullptr) {
      auto* next = iter->x34_next;
      iter->VerifyCurrentShader(0);
      for (auto& shader : iter->x18_matSets) {
        shader.UnlockTextures();
      }

      iter->x28_modelInst->UnlockTextures();
      iter->x34_next = nullptr;
      iter->x30_prev = nullptr;
      iter = next;
    }

    sTwoFrameList = sOneFrameList;
    sOneFrameList = sThisFrameList;
    sThisFrameList = nullptr;
  }
}

void CModel::EnableTextureTimeout() { sIsTextureTimeoutEnabled = true; }
void CModel::DisableTextureTimeout() { sIsTextureTimeoutEnabled = false; }
#pragma endregion

#pragma region CCubeModel

CCubeModel::CCubeModel(std::vector<std::unique_ptr<CCubeSurface>>* surfaces,
                       std::vector<TCachedToken<CTexture>>* textures, const u8* materialData,
                       const std::vector<zeus::CVector3f>* positions, const std::vector<zeus::CColor>* colors,
                       const std::vector<zeus::CVector3f>* normals, const std::vector<zeus::CVector2f>* texCoords,
                       const std::vector<std::array<s16, 2>>* packedTexCoords, const zeus::CAABox& aabox, u8 flags,
                       bool b1, u32 idx)
: x0_modelInstance(surfaces, materialData, positions, colors, normals, texCoords, packedTexCoords)
, x1c_textures(textures)
, x20_worldAABB(aabox)
, x40_24_(!b1)
, x41_visorFlags(flags)
, x44_idx(idx) {
  for (const auto& surf : x0_modelInstance.Surfaces()) {
    surf->SetParent(this);
  }

  for (u32 i = x0_modelInstance.Surfaces().size(); i > 0; --i) {
    const auto& surf = x0_modelInstance.Surfaces()[i - 1];
    if (!GetMaterialByIndex(surf->GetMaterialIndex()).IsFlagSet(EStateFlags::DepthSorting)) {
      surf->SetNextSurface(x38_firstUnsortedSurf);
      x38_firstUnsortedSurf = surf.get();
    } else {
      surf->SetNextSurface(x3c_firstSortedSurf);
      x3c_firstSortedSurf = surf.get();
    }
  }
}

CCubeMaterial CCubeModel::GetMaterialByIndex(u32 idx) {
  u32 materialOffset = 0;
  const u8* matData = x0_modelInstance.GetMaterialPointer();
  matData += (x1c_textures->size() + 1) * 4;
  if (idx != 0) {
    materialOffset = hecl::SBig(*reinterpret_cast<const u32*>(matData + (idx * 4)));
  }

  u32 materialCount = hecl::SBig(*reinterpret_cast<const u32*>(matData));
  return CCubeMaterial(matData + materialOffset + (materialCount * 4) + 4);
}

void CCubeModel::UnlockTextures() {
  for (TCachedToken<CTexture>& tex : *x1c_textures) {
    tex.Unlock();
  }
}

void CCubeModel::MakeTexturesFromMats(const u8* ptr, std::vector<TCachedToken<CTexture>>& textures, IObjectStore* store,
                                      bool b1) {
  const u32* curId = reinterpret_cast<const u32*>(ptr + 4);
  u32 textureCount = hecl::SBig(*reinterpret_cast<const u32*>(ptr));
  textures.reserve(textureCount);
  for (u32 i = 0; i < textureCount; ++i) {
    textures.emplace_back(store->GetObj({FOURCC('TXTR'), hecl::SBig(curId[i])}));

    if (!b1 && textures.back().IsNull()) {
      textures.back().GetObj();
    }
  }
}

#pragma endregion

#pragma region CCubeSurface
CCubeSurface::CCubeSurface(u8* ptr) : x0_data(ptr) {
  CMemoryInStream mem(ptr, 10000); // Oversized so we can read everything in
  x0_center.readBig(mem);
  xc_materialIndex = mem.readUint32Big();
  x10_displayListSize = mem.readUint32Big();
  x14_parent = reinterpret_cast<CCubeModel*>(mem.readUint32Big());
  x18_nextSurface = reinterpret_cast<CCubeSurface*>(mem.readUint32Big());
  x1c_extraSize = mem.readUint32Big();
  x20_normal.readBig(mem);
  if (x1c_extraSize > 0) {
    x2c_bounds = zeus::CAABox::ReadBoundingBoxBig(mem);
  }
}

#pragma endregion

CFactoryFnReturn FModelFactory(const metaforce::SObjectTag& tag, std::unique_ptr<u8[]>&& in, u32 len,
                               const metaforce::CVParamTransfer& vparms, CObjectReference* selfRef) {
  CSimplePool* sp = vparms.GetOwnedObj<CSimplePool*>();
  CFactoryFnReturn ret = TToken<CModel>::GetIObjObjectFor(std::make_unique<CModel>(std::move(in), len, sp));
  return ret;
}

} // namespace metaforce::WIP