import os
import SCons.Errors
import SCons.Defaults
import glob

Import('env')

#env.Append(CCFLAGS = ' -DBOOST_PYTHON_DYNAMIC_LIB')

#boost python
prefix = env['PREFIX']
boost_root = env['BOOST_ROOT']
python_root = env['PYTHON_ROOT']
python_version = env['PYTHON_VERSION']
python_headers  = python_root+'/include/python'+python_version

boost_python_src_dir = boost_root + '/libs/python/src/'

boost_python_src = glob.glob(boost_python_src_dir + '*.cpp')
boost_python_src.append(glob.glob(boost_python_src_dir + 'object/*.cpp'))
boost_python_src.append(glob.glob(boost_python_src_dir + 'converter/*.cpp'))

python_cpppath  = python_root+'/include/python'+python_version
lib_boost_python = env.SharedLibrary('libboost-python',boost_python_src,CPPPATH=[boost_root,python_cpppath])

env.Install(prefix + '/lib',lib_boost_python)

agg_root = env['AGG_ROOT']
agg_headers = agg_root +'/include'
freetype2_root = env['FREETYPE2_ROOT']


def createPythonExtBuilder(env):
    """This is a utility function that creates boost-python  
    etxension Builder in an Environment if it is not there already. 
    If it is already there, we return the existing one.
    """

    try:
        python_ext = env['BUILDERS']['PythonExtension']
    except KeyError:
        action_list = [ SCons.Defaults.SharedCheck,
                        SCons.Defaults.ShLinkAction ]
        python_ext = SCons.Builder.Builder(action = action_list,
                                           emitter = "$SHLIBEMITTER",
                                           prefix = '',
                                           suffix = '$SHLIBSUFFIX',
                                           target_scanner = SCons.Defaults.ProgScan,
                                           src_suffix = '$SHOBJSUFFIX',
                                           src_builder = 'SharedObject')
        env['BUILDERS']['PythonExtension'] = python_ext

    return python_ext

createPythonExtBuilder(env)

mapnik_python_src=Split(
    """
    mapnik_color.cpp
    mapnik_envelope.cpp
    mapnik_image.cpp
    mapnik_layer.cpp
    mapnik_map.cpp
    mapnik_parameters.cpp
    mapnik_filter.cpp
    mapnik_rule.cpp
    mapnik_style.cpp
    mapnik_stroke.cpp
    mapnik_datasource_cache.cpp
    mapnik_python.cpp 
    """
    )

headers =[ '#include',boost_root,freetype2_root,agg_headers,python_headers]

libraries=['mapnik','agg','boost-filesystem','boost-regex','boost-python']
libpaths = [prefix+"/lib",'#agg']

mapnik_python = env.PythonExtension(target='mapnik',source=mapnik_python_src,CPPPATH=headers,LIBS=libraries,LIBPATH=libpaths)

env.Alias(target="install",source=env.Install(prefix+'/lib',mapnik_python))