#include <components/detournavigator/recastmeshobject.hpp>
#include <components/misc/convert.hpp>

#include <BulletCollision/CollisionShapes/btBoxShape.h>
#include <BulletCollision/CollisionShapes/btCompoundShape.h>

#include <gtest/gtest.h>

namespace
{
    using namespace testing;
    using namespace DetourNavigator;

    struct DetourNavigatorRecastMeshObjectTest : Test
    {
        btBoxShape mBoxShapeImpl{ btVector3(1, 2, 3) };
        const ObjectTransform mObjectTransform{ ESM::Position{ { 1, 2, 3 }, { 1, 2, 3 } }, 0.5f };
        CollisionShape mBoxShape{ nullptr, mBoxShapeImpl, mObjectTransform };
        btCompoundShape mCompoundShapeImpl{ true };
        CollisionShape mCompoundShape{ nullptr, mCompoundShapeImpl, mObjectTransform };
        btTransform mTransform{ Misc::Convert::makeBulletTransform(mObjectTransform.mPosition) };

        DetourNavigatorRecastMeshObjectTest()
        {
            mCompoundShapeImpl.addChildShape(mTransform, std::addressof(mBoxShapeImpl));
        }
    };

    TEST_F(DetourNavigatorRecastMeshObjectTest, constructed_object_should_have_shape_and_transform)
    {
        const RecastMeshObject object(mBoxShape, mTransform, AreaType_ground);
        EXPECT_EQ(std::addressof(object.getShape()), std::addressof(mBoxShapeImpl));
        EXPECT_EQ(object.getTransform(), mTransform);
    }

    TEST_F(DetourNavigatorRecastMeshObjectTest, update_with_same_transform_for_not_compound_shape_should_return_false)
    {
        RecastMeshObject object(mBoxShape, mTransform, AreaType_ground);
        EXPECT_FALSE(object.update(mTransform, AreaType_ground));
    }

    TEST_F(DetourNavigatorRecastMeshObjectTest, update_with_different_transform_should_return_true)
    {
        RecastMeshObject object(mBoxShape, mTransform, AreaType_ground);
        EXPECT_TRUE(object.update(btTransform::getIdentity(), AreaType_ground));
    }

    TEST_F(DetourNavigatorRecastMeshObjectTest, update_with_different_flags_should_return_true)
    {
        RecastMeshObject object(mBoxShape, mTransform, AreaType_ground);
        EXPECT_TRUE(object.update(mTransform, AreaType_null));
    }

    TEST_F(DetourNavigatorRecastMeshObjectTest,
        update_for_compound_shape_with_same_transform_and_not_changed_child_transform_should_return_false)
    {
        RecastMeshObject object(mCompoundShape, mTransform, AreaType_ground);
        EXPECT_FALSE(object.update(mTransform, AreaType_ground));
    }

    TEST_F(DetourNavigatorRecastMeshObjectTest,
        update_for_compound_shape_with_same_transform_and_changed_child_transform_should_return_true)
    {
        RecastMeshObject object(mCompoundShape, mTransform, AreaType_ground);
        mCompoundShapeImpl.updateChildTransform(0, btTransform::getIdentity());
        EXPECT_TRUE(object.update(mTransform, AreaType_ground));
    }

    TEST_F(DetourNavigatorRecastMeshObjectTest, repeated_update_for_compound_shape_without_changes_should_return_false)
    {
        RecastMeshObject object(mCompoundShape, mTransform, AreaType_ground);
        mCompoundShapeImpl.updateChildTransform(0, btTransform::getIdentity());
        object.update(mTransform, AreaType_ground);
        EXPECT_FALSE(object.update(mTransform, AreaType_ground));
    }

    TEST_F(DetourNavigatorRecastMeshObjectTest, update_for_changed_local_scaling_should_return_true)
    {
        RecastMeshObject object(mBoxShape, mTransform, AreaType_ground);
        mBoxShapeImpl.setLocalScaling(btVector3(2, 2, 2));
        EXPECT_TRUE(object.update(mTransform, AreaType_ground));
    }
}