#!/usr/bin/env python

import os
import sys

def configuration(parent_package='', top_path=None):
    from numpy.distutils.misc_util import Configuration
    from numpy.distutils.system_info import dict_append, get_info
    config = Configuration('quartz', parent_package, top_path)

    def generate_c_from_cython(extension, build_dir):
        if not sys.platform == 'darwin':
            print 'No %s will be built for this platform.' % (extension.name)
            return
        from distutils.dep_util import newer_group
        name = extension.name.split('.')[-1]
        source = extension.depends[0]
        target = os.path.join(build_dir, name+'.c')

        if newer_group(extension.depends, target):
            from Cython.Compiler import Main
            options = Main.CompilationOptions(
                defaults=Main.default_options,
                output_file=target)
            cython_result = Main.compile(source, options=options)
            if cython_result.num_errors != 0:
                raise RuntimeError("%d errors in Cython compile" %
                    cython_result.num_errors)
        return target

    extra_link_args=[
        '-Wl,-framework', '-Wl,CoreFoundation',
        '-Wl,-framework', '-Wl,ApplicationServices',
        '-Wl,-framework', '-Wl,Carbon',
        '-Wl,-framework', '-Wl,Foundation',
    ]
    include_dirs = ['/Developer/Headers/FlatCarbon']
    config.add_extension('ATSFont',
                         [generate_c_from_cython],
                         include_dirs = include_dirs,
                         extra_link_args = extra_link_args,
                         depends=["ATSFont.pyx",
                                  "Python.pxi",
                                  "ATS.pxi",
                                  ],
                         )
    config.add_extension('ABCGI',
                         [generate_c_from_cython],
                         include_dirs = include_dirs,
                         depends = ["ABCGI.pyx",
                                    "ATSUI.pxi",
                                    "Python.pxi",
                                    "numpy.pxi",
                                    "c_numpy.pxd",
                                    "CoreFoundation.pxi",
                                    "CoreGraphics.pxi",
                                    "QuickDraw.pxi",
                                    ]
                         )

    wx_info = get_info('wx')
    if wx_info:
        # Find the release number of wx.
        wx_release = '2.6'
        for macro, value in wx_info['define_macros']:
            if macro.startswith('WX_RELEASE_'):
                wx_release = macro[len('WX_RELEASE_'):].replace('_', '.')
                break

        if wx_release == '2.6':
            macport_cpp = config.paths('macport26.cpp')[0]
        else:
            macport_cpp = config.paths('macport28.cpp')[0]

        def get_macport_cpp(extension, build_dir):
            if sys.platform != 'darwin':
                print 'No %s will be built for this platform.'%(extension.name)
                return None

            elif wx_release not in ('2.6', '2.8'):
                print ('No %s will be built because we do not recognize '
                       'wx version %s' % (extension.name, wx_release))
                return None

            return macport_cpp

        info = {}
        dict_append(info, define_macros=[("__WXMAC__", 1)])
        dict_append(info, **wx_info)
        config.add_extension('macport', [get_macport_cpp],
                             depends = [macport_cpp],
                             **wx_info
                             )
    return config