find_program(Graphviz_EXECUTABLE NAMES dot PATHS $ENV{PATH} DOC "path to Graphviz executable" REQUIRED)
mark_as_advanced(Graphviz_EXECUTABLE)

if(Graphviz_EXECUTABLE)
	set(Graphviz_FOUND true)

	if(WIN32)
		string(REGEX REPLACE "/bin/dot.exe" "" Graphviz_PATH ${Graphviz_EXECUTABLE})
	endif()

	find_library(Graphviz_GVC_STATIC_LIBRARY NAMES gvc HINTS ${Graphviz_PATH}/lib)
	find_library(Graphviz_CDT_STATIC_LIBRARY NAMES cdt HINTS ${Graphviz_PATH}/lib)
	find_library(Graphviz_GRAPH_STATIC_LIBRARY NAMES cgraph HINTS ${Graphviz_PATH}/lib)
	find_library(Graphviz_GVP_CORE_STATIC_LIBRARY NAMES gvplugin_core HINTS ${Graphviz_PATH}/lib)
	find_library(Graphviz_GVP_DOT_LAYOUT_STATIC_LIBRARY NAMES gvplugin_dot_layout HINTS ${Graphviz_PATH}/lib)
	find_library(Graphviz_GVP_GDI_PLUS_STATIC_LIBRARY NAMES gvplugin_gdiplus HINTS ${Graphviz_PATH}/lib)
	find_library(Graphviz_GVP_NEATO_LAYOUT_STATIC_LIBRARY NAMES gvplugin_neato_layout HINTS ${Graphviz_PATH}/lib)
	find_library(Graphviz_GVP_PANGO_STATIC_LIBRARY NAMES gvplugin_pango HINTS ${Graphviz_PATH}/lib)
	find_library(Graphviz_XDOT_STATIC_LIBRARY NAMES xdot HINTS ${Graphviz_PATH}/lib)
	find_library(Graphviz_PATHPLAN_STATIC_LIBRARY NAMES pathplan HINTS ${Graphviz_PATH}/lib)

	set(Graphviz_INCLUDE_DIRECTORIES "${Graphviz_PATH}/include/graphviz")
	set(Graphviz_LIBRARIES ${Graphviz_GVC_STATIC_LIBRARY} ${Graphviz_CDT_STATIC_LIBRARY} ${Graphviz_GRAPH_STATIC_LIBRARY} 
						   ${Graphviz_GVP_CORE_STATIC_LIBRARY} ${Graphviz_GVP_DOT_LAYOUT_STATIC_LIBRARY} ${Graphviz_GVP_GDI_PLUS_STATIC_LIBRARY}
						   ${Graphviz_GVP_NEATO_LAYOUT_STATIC_LIBRARY} ${Graphviz_GVP_PANGO_STATIC_LIBRARY}
						   ${Graphviz_XDOT_STATIC_LIBRARY} ${Graphviz_PATHPLAN_STATIC_LIBRARY})

	if (EXISTS "${Graphviz_PATH}/include/graphviz/graphviz_version.h")
		file(READ "${Graphviz_PATH}/include/graphviz/graphviz_version.h" _graphviz_version_content)
		string(REGEX MATCH "#define +PACKAGE_VERSION +\"([0-9]+\\.[0-9]+\\.[0-9]+)\"" _dummy "${_graphviz_version_content}")
		set(Graphviz_VERSION "${CMAKE_MATCH_1}")
	endif ()

	include(FindPackageHandleStandardArgs)
	find_package_handle_standard_args(Graphviz
		REQUIRED_VARS Graphviz_LIBRARIES Graphviz_INCLUDE_DIRECTORIES
		VERSION_VAR   Graphviz_VERSION)

	if(NOT TARGET Graphviz::Graphviz)
		add_library(Graphviz::Graphviz UNKNOWN IMPORTED)
		set_target_properties(Graphviz::Graphviz PROPERTIES
			IMPORTED_LOCATION "${Graphviz_GVC_STATIC_LIBRARY}" # randomly picked, should this be another one?
			INTERFACE_LINK_LIBRARIES  "${Graphviz_CDT_STATIC_LIBRARY};${Graphviz_GRAPH_STATIC_LIBRARY};${Graphviz_GVP_CORE_STATIC_LIBRARY};${Graphviz_GVP_DOT_LAYOUT_STATIC_LIBRARY};${Graphviz_GVP_GDI_PLUS_STATIC_LIBRARY};${Graphviz_GVP_NEATO_LAYOUT_STATIC_LIBRARY};${Graphviz_GVP_PANGO_STATIC_LIBRARY};${Graphviz_XDOT_STATIC_LIBRARY};${Graphviz_PATHPLAN_STATIC_LIBRARY}"
			INTERFACE_INCLUDE_DIRECTORIES "${Graphviz_INCLUDE_DIRECTORIES}"
		)
	endif()

endif()