# -*-python-*-
#--------------------------------------------------------------------------------
#
#       OpenAlea.SConsX: SCons extension package for building platform
#                        independant packages.
#
#       Copyright 2006-2009 INRIA - CIRAD - INRA
#
#       File author(s): Christophe Pradal <christophe.prada@cirad.fr>
#
#       Distributed under the Cecill-C License.
#       See accompanying file LICENSE.txt or copy at
#           http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.html
#
#       OpenAlea WebSite : http://openalea.gforge.inria.fr
#
#--------------------------------------------------------------------------------
""" CGAL configure environment. """

__license__ = "Cecill-C"
__revision__ = "$Id$"

import os, sys
from os.path import exists
from openalea.sconsx.config import *
from os.path import join

class CGAL:
   def __init__(self, config):
      self.name = 'cgal'
      self.config = config
      self._default = {}


   def depends(self):
      deps = ['gmp']

      return deps


   def default(self):

      #self._default['libs_suffix'] = '$compiler_libs_suffix'
      self._default['flags'] = ''
      self._default['defines'] = ''
      if CONDA_ENV:
          prefix = CONDA_LIBRARY_PREFIX
          self._default['include'] = pj(prefix, "include")
          self._default['libpath'] = pj(prefix, "lib")
          self._default['libs'] = ['CGAL']
      elif isinstance(platform, Win32):

         self._default['flags'] = ''
         self._default['defines'] = ''

         try:
            cgalroot = os.environ['CGALROOT']
            self._default['include'] = [pj(cgalroot,'include'), pj(cgalroot,'include','CGAL','config','msvc')]
            self._default['libpath'] = pj(cgalroot,'lib')
            self._default['libs'] = 'CGAL-vc100-mt-4.0'
         except:
            try:
               import openalea.config as conf
               self._default['include'] = conf.include_dir
               self._default['libpath'] = conf.lib_dir
            except ImportError as e:
               try:
                  import pkg_resources as pkg
                  egg_env = pkg.Environment()
                  mingw_base = egg_env["cgal"][0].location
                  self._default['include'] = pj(mingw_base, "include")
                  self._default['libpath'] = pj(mingw_base, "lib")
               except Exception as e:
                  self._default['include'] = 'C:' + os.sep
                  self._default['libpath'] = 'C:' + os.sep

            self._default['libs'] = ['CGAL']

      elif isinstance(platform, Posix):
        defdir = detect_posix_project_installpath('include/CGAL')
        self._default['include'] = pj(defdir,'include')
        self._default['libpath']     = pj(defdir,'lib')
        self._default['libs'] = 'CGAL'



   def option( self, opts):

      self.default()

      opts.AddVariables(('cgal_includes',
                     'CGAL include files',
                     self._default['include']),

         PathVariable('cgal_libpath',
                     'CGAL libraries path',
                     self._default['libpath']),

         ('cgal_libs',
           'CGAL libraries',
           self._default['libs']),

         ('cgal_flags',
           'CGAL compiler flags',
           self._default['flags']),

         ('cgal_defines',
           'CGAL defines',
           self._default['defines']),

         BoolVariable('WITH_CGAL',
           'Specify whether you want to compile your project with CGAL', True)
     )


   def update(self, env):
      """ Update the environment with specific flags """
      if env['WITH_CGAL'] :
        cgal_inc = env['cgal_includes']
        if type(cgal_inc) == str:
          cgal_inc = cgal_inc.split()
        cgal_inc = cgal_inc[0]
        if not os.path.exists(os.path.join(cgal_inc,'CGAL')):
          import openalea.sconsx.errormsg as em
          em.error("CGAL headers not found. CGAL disabled ...")
          env['WITH_CGAL'] = False
      if env['WITH_CGAL']:
        env.AppendUnique(CPPPATH=[env['cgal_includes']])
        env.AppendUnique(LIBPATH=[env['cgal_libpath']])
        env.Append(CPPDEFINES='$cgal_defines')
        env.Append(CPPDEFINES='WITH_CGAL')
        env.Append(CPPFLAGS='$cgal_flags')

        env.AppendUnique(LIBS=env['cgal_libs'])


   def configure(self, config):
      if not config.conf.CheckCXXHeader('CGAL/version.h'):
        print("Error: CGAL headers not found.")
        exit()




def create(config):
   " Create cgal tool "
   cgal = CGAL(config)

   deps= cgal.depends()
   for lib in deps:
      config.add_tool(lib)

   return cgal