//
// Copyright 2016 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
//    names, trademarks, service marks, or product names of the Licensor
//    and its affiliates, except as required to comply with Section 4(c) of
//    the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#include "pxr/usd/usdGeom/capsule.h"
#include "pxr/usd/usd/schemaRegistry.h"
#include "pxr/usd/usd/typed.h"

#include "pxr/usd/sdf/types.h"
#include "pxr/usd/sdf/assetPath.h"

PXR_NAMESPACE_OPEN_SCOPE

// Register the schema with the TfType system.
TF_REGISTRY_FUNCTION(TfType)
{
    TfType::Define<UsdGeomCapsule,
        TfType::Bases< UsdGeomGprim > >();
    
    // Register the usd prim typename as an alias under UsdSchemaBase. This
    // enables one to call
    // TfType::Find<UsdSchemaBase>().FindDerivedByName("Capsule")
    // to find TfType<UsdGeomCapsule>, which is how IsA queries are
    // answered.
    TfType::AddAlias<UsdSchemaBase, UsdGeomCapsule>("Capsule");
}

/* virtual */
UsdGeomCapsule::~UsdGeomCapsule()
{
}

/* static */
UsdGeomCapsule
UsdGeomCapsule::Get(const UsdStagePtr &stage, const SdfPath &path)
{
    if (!stage) {
        TF_CODING_ERROR("Invalid stage");
        return UsdGeomCapsule();
    }
    return UsdGeomCapsule(stage->GetPrimAtPath(path));
}

/* static */
UsdGeomCapsule
UsdGeomCapsule::Define(
    const UsdStagePtr &stage, const SdfPath &path)
{
    static TfToken usdPrimTypeName("Capsule");
    if (!stage) {
        TF_CODING_ERROR("Invalid stage");
        return UsdGeomCapsule();
    }
    return UsdGeomCapsule(
        stage->DefinePrim(path, usdPrimTypeName));
}

/* virtual */
UsdSchemaType UsdGeomCapsule::_GetSchemaType() const {
    return UsdGeomCapsule::schemaType;
}

/* static */
const TfType &
UsdGeomCapsule::_GetStaticTfType()
{
    static TfType tfType = TfType::Find<UsdGeomCapsule>();
    return tfType;
}

/* static */
bool 
UsdGeomCapsule::_IsTypedSchema()
{
    static bool isTyped = _GetStaticTfType().IsA<UsdTyped>();
    return isTyped;
}

/* virtual */
const TfType &
UsdGeomCapsule::_GetTfType() const
{
    return _GetStaticTfType();
}

UsdAttribute
UsdGeomCapsule::GetHeightAttr() const
{
    return GetPrim().GetAttribute(UsdGeomTokens->height);
}

UsdAttribute
UsdGeomCapsule::CreateHeightAttr(VtValue const &defaultValue, bool writeSparsely) const
{
    return UsdSchemaBase::_CreateAttr(UsdGeomTokens->height,
                       SdfValueTypeNames->Double,
                       /* custom = */ false,
                       SdfVariabilityVarying,
                       defaultValue,
                       writeSparsely);
}

UsdAttribute
UsdGeomCapsule::GetRadiusAttr() const
{
    return GetPrim().GetAttribute(UsdGeomTokens->radius);
}

UsdAttribute
UsdGeomCapsule::CreateRadiusAttr(VtValue const &defaultValue, bool writeSparsely) const
{
    return UsdSchemaBase::_CreateAttr(UsdGeomTokens->radius,
                       SdfValueTypeNames->Double,
                       /* custom = */ false,
                       SdfVariabilityVarying,
                       defaultValue,
                       writeSparsely);
}

UsdAttribute
UsdGeomCapsule::GetAxisAttr() const
{
    return GetPrim().GetAttribute(UsdGeomTokens->axis);
}

UsdAttribute
UsdGeomCapsule::CreateAxisAttr(VtValue const &defaultValue, bool writeSparsely) const
{
    return UsdSchemaBase::_CreateAttr(UsdGeomTokens->axis,
                       SdfValueTypeNames->Token,
                       /* custom = */ false,
                       SdfVariabilityUniform,
                       defaultValue,
                       writeSparsely);
}

UsdAttribute
UsdGeomCapsule::GetExtentAttr() const
{
    return GetPrim().GetAttribute(UsdGeomTokens->extent);
}

UsdAttribute
UsdGeomCapsule::CreateExtentAttr(VtValue const &defaultValue, bool writeSparsely) const
{
    return UsdSchemaBase::_CreateAttr(UsdGeomTokens->extent,
                       SdfValueTypeNames->Float3Array,
                       /* custom = */ false,
                       SdfVariabilityVarying,
                       defaultValue,
                       writeSparsely);
}

namespace {
static inline TfTokenVector
_ConcatenateAttributeNames(const TfTokenVector& left,const TfTokenVector& right)
{
    TfTokenVector result;
    result.reserve(left.size() + right.size());
    result.insert(result.end(), left.begin(), left.end());
    result.insert(result.end(), right.begin(), right.end());
    return result;
}
}

/*static*/
const TfTokenVector&
UsdGeomCapsule::GetSchemaAttributeNames(bool includeInherited)
{
    static TfTokenVector localNames = {
        UsdGeomTokens->height,
        UsdGeomTokens->radius,
        UsdGeomTokens->axis,
        UsdGeomTokens->extent,
    };
    static TfTokenVector allNames =
        _ConcatenateAttributeNames(
            UsdGeomGprim::GetSchemaAttributeNames(true),
            localNames);

    if (includeInherited)
        return allNames;
    else
        return localNames;
}

PXR_NAMESPACE_CLOSE_SCOPE

// ===================================================================== //
// Feel free to add custom code below this line. It will be preserved by
// the code generator.
//
// Just remember to wrap code in the appropriate delimiters:
// 'PXR_NAMESPACE_OPEN_SCOPE', 'PXR_NAMESPACE_CLOSE_SCOPE'.
// ===================================================================== //
// --(BEGIN CUSTOM CODE)--

#include "pxr/usd/usdGeom/boundableComputeExtent.h"
#include "pxr/base/tf/registryManager.h"

PXR_NAMESPACE_OPEN_SCOPE

static bool
_ComputeExtentMax(double height, double radius, const TfToken& axis,
    GfVec3f* max)
{
    // The height is increased by the capsule's radius from the hemispheres on
    // either side of the capsule.
    float halfHeightWithCap = height * 0.5 + radius;

    if (axis == UsdGeomTokens->x) {
        *max = GfVec3f(halfHeightWithCap, radius, radius);
    } else if (axis == UsdGeomTokens->y) {
        *max = GfVec3f(radius, halfHeightWithCap, radius);
    } else if (axis == UsdGeomTokens->z) {
        *max = GfVec3f(radius, radius, halfHeightWithCap);
    } else {
      return false; // invalid axis
    }

    return true;
}

bool
UsdGeomCapsule::ComputeExtent(double height, double radius, const TfToken& axis,
    VtVec3fArray* extent)
{
    // Create Sized Extent
    extent->resize(2);

    GfVec3f max;
    if (!_ComputeExtentMax(height, radius, axis, &max)) {
        return false;
    }

    (*extent)[0] = -max;
    (*extent)[1] = max;

    return true;
}

bool
UsdGeomCapsule::ComputeExtent(double height, double radius, const TfToken& axis,
    const GfMatrix4d& transform, VtVec3fArray* extent)
{
    // Create Sized Extent
    extent->resize(2);

    GfVec3f max;
    if (!_ComputeExtentMax(height, radius, axis, &max)) {
        return false;
    }

    GfBBox3d bbox = GfBBox3d(GfRange3d(-max, max), transform);
    GfRange3d range = bbox.ComputeAlignedRange();
    (*extent)[0] = GfVec3f(range.GetMin());
    (*extent)[1] = GfVec3f(range.GetMax());

    return true;
}

static bool
_ComputeExtentForCapsule(
    const UsdGeomBoundable& boundable,
    const UsdTimeCode& time,
    const GfMatrix4d* transform,
    VtVec3fArray* extent)
{
    const UsdGeomCapsule capsuleSchema(boundable);
    if (!TF_VERIFY(capsuleSchema)) {
        return false;
    }

    double height;
    if (!capsuleSchema.GetHeightAttr().Get(&height)) {
        return false;
    }

    double radius;
    if (!capsuleSchema.GetRadiusAttr().Get(&radius)) {
        return false;
    }

    TfToken axis;
    if (!capsuleSchema.GetAxisAttr().Get(&axis)) {
        return false;
    }

    if (transform) {
        return UsdGeomCapsule::ComputeExtent(
            height, radius, axis, *transform, extent);
    } else {
        return UsdGeomCapsule::ComputeExtent(height, radius, axis, extent);
    }
}

TF_REGISTRY_FUNCTION(UsdGeomBoundable)
{
    UsdGeomRegisterComputeExtentFunction<UsdGeomCapsule>(
        _ComputeExtentForCapsule);
}

PXR_NAMESPACE_CLOSE_SCOPE