# Try to find the CGAL libraries
# CGAL_FOUND             - system has CGAL lib
# CGAL_INCLUDE_DIR       - the CGAL include directory 
# CGAL_LIBRARIES_DIR     - the CGAL libraries directory
# CGAL_LIBRARIES         - the CGAL libraries 
# CGAL_CMAKE_MODULE_PATH - the directory containing CGAL related CMake stuff

# CGAL_ROOT              - set to the enviroment variable CGALROOT, IF defined (can be empty)

# If found, the folder containing the CGAL-specific CMake stuff is added to CMAKE_MODULE_PATH

set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)

if ( NOT CGAL_INCLUDE_DIRS OR NOT CGAL_LIBRARIES_DIRS OR NOT CGAL_CMAKE_MODULE_PATH )

  set(CGAL_ROOT $ENV{CGALROOT})

  if(CGAL_ROOT)
    file(TO_CMAKE_PATH ${CGAL_ROOT} CGAL_ROOT)
  endif()

  find_path(CGAL_INCLUDE_DIR 
            NAMES CGAL/basic.h
            PATHS ${CMAKE_SOURCE_DIR}/include ${CGAL_ROOT}/include  
        	  DOC "The directories containing include files for CGAL"
           )
           
  find_path(CGAL_CMAKE_MODULE_PATH CGALcommon.cmake
            PATHS ${CMAKE_BINARY_DIR}/cmake/modules ${CGAL_ROOT}/cmake/modules ${CMAKE_MODULE_PATH}
        	  DOC "The directories containing CGAL CMake stuff"
           )

  if ( "${CMAKE_GENERATOR}" MATCHES "Visual Studio" )

    if ( "${CMAKE_GENERATOR}" MATCHES "2003" )
      set(TOOLSET "-vc71")
    elseif ( "${CMAKE_GENERATOR}" MATCHES "2005" )  
      set(TOOLSET "-vc80")
    elseif ( "${CMAKE_GENERATOR}" MATCHES "2008" )  
      set(TOOLSET "-vc90")
    endif()
    
    find_path(CGAL_LIBRARIES_DIR 
              NAMES "cgal${TOOLSET}-mt.lib" "cgal${TOOLSET}-mt-gd.lib" "cgal${TOOLSET}-mt-o.lib" "cgal${TOOLSET}-mt-g.lib"
              PATHS ${CMAKE_BINARY_DIR}/lib ${CGAL_ROOT}/lib
         	    DOC "Path to CGAL and third-party libraries"
             ) 

    set(CGAL_LIBRARIES "") 
    
  else()

    find_library(CGAL_LIBRARIES NAMES CGAL
                 PATHS ${CMAKE_BINARY_DIR}/lib ${CGAL_ROOT}/lib 
                 DOC "CGAL libraries"
                )
                
    get_filename_component(CGAL_LIBRARIES_DIR ${CGAL_LIBRARIES} PATH)
              
  endif()
  
endif()

if ( CGAL_INCLUDE_DIR AND CGAL_LIBRARIES_DIR AND CGAL_CMAKE_MODULE_PATH )
  set( CGAL_FOUND TRUE )
  set( CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CGAL_CMAKE_MODULE_PATH})
else()
  if ( CGAL_FIND_REQUIRED)
    message(FATAL_ERROR "Could NOT find CGAL")
  else()
    if (NOT CGAL_FIND_QUIETLY)
      message(STATUS "Could NOT find CGAL")
    endif()
  endif()  
endif()