#!/usr/bin/env python

from __future__ import division, print_function, absolute_import

from os.path import join, dirname
import glob


def configuration(parent_package='', top_path=None):
    from numpy.distutils.misc_util import Configuration, get_numpy_include_dirs
    from numpy.distutils.misc_util import get_info as get_misc_info
    from numpy.distutils.system_info import get_info as get_sys_info
    from distutils.sysconfig import get_python_inc

    config = Configuration('spatial', parent_package, top_path)

    config.add_data_dir('tests')

    # qhull
    qhull_src = list(glob.glob(join(dirname(__file__), 'qhull',
                                    'src', '*.c')))

    inc_dirs = [get_python_inc()]
    if inc_dirs[0] != get_python_inc(plat_specific=1):
        inc_dirs.append(get_python_inc(plat_specific=1))
    inc_dirs.append(get_numpy_include_dirs())

    cfg = dict(get_sys_info('lapack_opt'))
    cfg.setdefault('include_dirs', []).extend(inc_dirs)

    def get_qhull_misc_config(ext, build_dir):
        # Generate a header file containing defines
        config_cmd = config.get_config_cmd()
        defines = []
        if config_cmd.check_func('open_memstream', decl=True, call=True):
            defines.append(('HAVE_OPEN_MEMSTREAM', '1'))
        target = join(dirname(__file__), 'qhull_misc_config.h')
        with open(target, 'w') as f:
            for name, value in defines:
                f.write('#define {0} {1}\n'.format(name, value))

    config.add_extension('qhull',
                         sources=['qhull.c'] + qhull_src + [get_qhull_misc_config],
                         **cfg)

    # cKDTree    
    ckdtree_src = ['query.cxx', 
                   'build.cxx',
                   'globals.cxx',
                   'cpp_exc.cxx',
                   'query_pairs.cxx',
                   'count_neighbors.cxx',
                   'query_ball_point.cxx',
                   'query_ball_tree.cxx',
                   'sparse_distances.cxx']
                   
    ckdtree_src = [join('ckdtree', 'src', x) for x in ckdtree_src]
    
    ckdtree_headers = ['ckdtree_decl.h', 
                       'cpp_exc.h', 
                       'ckdtree_methods.h',
                       'cpp_utils.h',
                       'rectangle.h',
                       'distance.h',
                       'distance_box.h',
                       'ordered_pair.h']
                       
    ckdtree_headers = [join('ckdtree', 'src', x) for x in ckdtree_headers]
        
    ckdtree_dep = ['ckdtree.cxx'] + ckdtree_headers + ckdtree_src
    config.add_extension('ckdtree',
                         sources=['ckdtree.cxx'] + ckdtree_src,
                         depends=ckdtree_dep,
                         include_dirs=inc_dirs + [join('ckdtree','src')])
    # _distance_wrap
    config.add_extension('_distance_wrap',
        sources=[join('src', 'distance_wrap.c')],
        depends=[join('src', 'distance_impl.h')],
        include_dirs=[get_numpy_include_dirs()],
        extra_info=get_misc_info("npymath"))

    return config

if __name__ == '__main__':
    from numpy.distutils.core import setup
    setup(maintainer="SciPy Developers",
          author="Anne Archibald",
          maintainer_email="scipy-dev@scipy.org",
          description="Spatial algorithms and data structures",
          url="https://www.scipy.org",
          license="SciPy License (BSD Style)",
          **configuration(top_path='').todict()
          )