INCLUDE(FindPackageHandleStandardArgs)
INCLUDE(FindLibraryWithDebug)

# Allow user to supply BGVIEWER_DIR or check ./external/BgViewer by default
if(NOT DEFINED BGVIEWER_DIR)
  if(DEFINED ENV{EXTERNAL_DIR})
    set(_external_hint "$ENV{EXTERNAL_DIR}")
  else()
    set(_external_hint "${CMAKE_SOURCE_DIR}/external")
  endif()
  set(BGVIEWER_DIR "${_external_hint}/BgViewer" CACHE PATH "BgViewer root directory (optional)")
endif()

# Search in common system locations and in BGVIEWER_DIR
set(_hints "${BGVIEWER_DIR}/lib" "${BGVIEWER_DIR}/lib/*" "${BGVIEWER_DIR}/lib/*/*")

FIND_LIBRARY_WITH_DEBUG(BGVIEWER_DTENTITY_LIBRARY WIN32_DEBUG_POSTFIX d dtEntity HINTS ${_hints})
FIND_LIBRARY_WITH_DEBUG(BGVIEWER_DTENTITYOSG_LIBRARY WIN32_DEBUG_POSTFIX d dtEntityOSG HINTS ${_hints})
FIND_PATH(BGVIEWER_INCLUDE_DIR dtEntity/export.h HINTS "${BGVIEWER_DIR}/include" "${BGVIEWER_DIR}/include/dtEntity" ${_hints} )

FIND_PACKAGE_HANDLE_STANDARD_ARGS(BgViewer DEFAULT_MSG
                                  BGVIEWER_DTENTITY_LIBRARY
                                  BGVIEWER_DTENTITYOSG_LIBRARY
                                  BGVIEWER_INCLUDE_DIR)
SET(BGVIEWER_LIBRARIES ${BGVIEWER_DTENTITYOSG_LIBRARY}
                       ${BGVIEWER_DTENTITY_LIBRARY})