#!/usr/bin/env python
"""DismalPy: a collection of resources for quantitative economics in Python.
"""

DOCLINES = __doc__.split("\n")

import os
import sys
import subprocess


if sys.version_info[:2] < (2, 6) or (3, 0) <= sys.version_info[0:2] < (3, 2):
    raise RuntimeError("Python version 2.6, 2.7 or >= 3.2 required.")

if sys.version_info[0] < 3:
    import __builtin__ as builtins
else:
    import builtins

CLASSIFIERS = """\
Development Status :: 4 - Beta
Intended Audience :: Science/Research
License :: OSI Approved :: BSD License
Programming Language :: Cython
Programming Language :: Python
Programming Language :: Python :: 3
Topic :: Scientific/Engineering
Operating System :: Microsoft :: Windows
Operating System :: POSIX
Operating System :: Unix
Operating System :: MacOS
"""

MAJOR               = 0
MINOR               = 2
MICRO               = 3
ISRELEASED          = True
VERSION             = '%d.%d.%d' % (MAJOR, MINOR, MICRO)


# Return the git revision as a string
def git_version():
    def _minimal_ext_cmd(cmd):
        # construct minimal environment
        env = {}
        for k in ['SYSTEMROOT', 'PATH']:
            v = os.environ.get(k)
            if v is not None:
                env[k] = v
        # LANGUAGE is used on win32
        env['LANGUAGE'] = 'C'
        env['LANG'] = 'C'
        env['LC_ALL'] = 'C'
        out = subprocess.Popen(cmd, stdout = subprocess.PIPE, env=env).communicate()[0]
        return out

    try:
        out = _minimal_ext_cmd(['git', 'rev-parse', 'HEAD'])
        GIT_REVISION = out.strip().decode('ascii')
    except OSError:
        GIT_REVISION = "Unknown"

    return GIT_REVISION


# BEFORE importing distutils, remove MANIFEST. distutils doesn't properly
# update it when the contents of directories change.
if os.path.exists('MANIFEST'):
    os.remove('MANIFEST')

def get_version_info():
    # Adding the git rev number needs to be done inside
    # write_version_py(), otherwise the import of dismalpy.version messes
    # up the build under Python 3.
    FULLVERSION = VERSION
    if os.path.exists('.git'):
        GIT_REVISION = git_version()
    elif os.path.exists('dismalpy/version.py'):
        # must be a source distribution, use existing version file
        # load it as a separate module to not load dismalpy/__init__.py
        import imp
        version = imp.load_source('dismalpy.version', 'dismalpy/version.py')
        GIT_REVISION = version.git_revision
    else:
        GIT_REVISION = "Unknown"

    if not ISRELEASED:
        FULLVERSION += '.dev-' + GIT_REVISION[:7]

    return FULLVERSION, GIT_REVISION


def write_version_py(filename='dismalpy/version.py'):
    cnt = """
# THIS FILE IS GENERATED FROM dismalpy SETUP.PY
short_version = '%(version)s'
version = '%(version)s'
full_version = '%(full_version)s'
git_revision = '%(git_revision)s'
release = %(isrelease)s

if not release:
    version = full_version
"""
    FULLVERSION, GIT_REVISION = get_version_info()

    a = open(filename, 'w')
    try:
        a.write(cnt % {'version': VERSION,
                       'full_version' : FULLVERSION,
                       'git_revision' : GIT_REVISION,
                       'isrelease': str(ISRELEASED)})
    finally:
        a.close()

try:
    from sphinx.setup_command import BuildDoc
    HAVE_SPHINX = True
except:
    HAVE_SPHINX = False

if HAVE_SPHINX:
    class DismalpyBuildDoc(BuildDoc):
        """Run in-place build before Sphinx doc build"""
        def run(self):
            # Make sure dismalpy is built for autodoc features
            ret = subprocess.call([sys.executable, sys.argv[0], 'build_ext', '-i'])
            if ret != 0:
                raise RuntimeError("Building Dismalpy failed!")

            # Regenerate notebooks
            cwd = os.path.abspath(os.path.dirname(__file__))
            print("Re-generating notebooks")
            p = subprocess.call([sys.executable,
                                 os.path.join(cwd, 'tools', 'sphinxify_notebooks.py'),
                                 ], cwd=cwd)
            if p != 0:
                raise RuntimeError("Notebook generation failed!")

            # Build the documentation
            BuildDoc.run(self)

def generate_cython():
    cwd = os.path.abspath(os.path.dirname(__file__))
    print("Cythonizing sources")
    p = subprocess.call([sys.executable,
                         os.path.join(cwd, 'tools', 'cythonize.py'),
                         'dismalpy'],
                         cwd=cwd)
    if p != 0:
        raise RuntimeError("Running cythonize failed!")


def configuration(parent_package='',top_path=None):
    from numpy.distutils.misc_util import Configuration
    config = Configuration(None, parent_package, top_path)
    config.set_options(ignore_setup_xxx_py=True,
                       assume_default_configuration=True,
                       delegate_options_to_subpackages=True,
                       quiet=True)

    config.add_subpackage('dismalpy')
    config.add_data_files(('dismalpy','*.txt'))

    config.get_version('dismalpy/version.py')

    return config

def setup_package():

    # Rewrite the version file every time
    write_version_py()

    if HAVE_SPHINX:
        cmdclass = {'build_sphinx': DismalpyBuildDoc}
    else:
        cmdclass = {}

    # Figure out whether to add ``*_requires = ['numpy']``.
    # We don't want to do that unconditionally, because we risk updating
    # an installed numpy which fails too often.  Just if it's not installed, we
    # may give it a try.  See gh-3379.
    build_requires = ['statsmodels>=0.8', 'scipy>=0.14', 'Cython>=0.20','pandas>=0.16.0']
    try:
        import numpy
    except:
        build_requires = ['numpy>=1.5.1']

    metadata = dict(
        name = 'dismalpy',
        maintainer = "Chad Fulton",
        maintainer_email = "ChadFulton+pypi@gmail.com",
        description = DOCLINES[0],
        long_description = "\n".join(DOCLINES[2:]),
        url = "http://github.com/dismalpy/dismalpy",
        # download_url = "",
        license = 'Simplified-BSD',
        cmdclass=cmdclass,
        classifiers=[_f for _f in CLASSIFIERS.split('\n') if _f],
        platforms = ["Windows", "Linux", "Solaris", "Mac OS-X", "Unix"],
        test_suite='nose.collector',
        setup_requires = build_requires,
        install_requires = build_requires,
    )

    if len(sys.argv) >= 2 and ('--help' in sys.argv[1:] or
            sys.argv[1] in ('--help-commands', 'egg_info', '--version',
                            'clean')):
        # For these actions, NumPy is not required.
        #
        # They are required to succeed without Numpy for example when
        # pip is used to install dismalpy when Numpy is not yet present in
        # the system.
        try:
            from setuptools import setup
        except ImportError:
            from distutils.core import setup

        FULLVERSION, GIT_REVISION = get_version_info()
        metadata['version'] = FULLVERSION
    else:
        # if len(sys.argv) >= 2 and sys.argv[1] == 'bdist_wheel':
        #     # bdist_wheel needs setuptools
        #     import setuptools
        import setuptools

        from numpy.distutils.core import setup

        cwd = os.path.abspath(os.path.dirname(__file__))
        if not os.path.exists(os.path.join(cwd, 'PKG-INFO')):
            # Generate Cython sources, unless building from source release
            generate_cython()

        metadata['configuration'] = configuration

    setup(**metadata)

if __name__ == '__main__':
    setup_package()