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"""A setup module for the GRPC Python package."""

import os
import os.path
import sys

from distutils import core as _core
from distutils import extension as _extension
import setuptools

# Ensure we're in the proper directory whether or not we're being used by pip.
os.chdir(os.path.dirname(os.path.abspath(__file__)))

# Break import-style to ensure we can actually find our commands module.
import commands

# Use environment variables to determine whether or not the Cython extension
# should *use* Cython or use the generated C files. Note that this requires the
# C files to have been generated by building first *with* Cython support.
_BUILD_WITH_CYTHON = os.environ.get('GRPC_PYTHON_BUILD_WITH_CYTHON', False)

_C_EXTENSION_SOURCES = (
    'grpc/_adapter/_c/module.c',
    'grpc/_adapter/_c/types.c',
    'grpc/_adapter/_c/utility.c',
    'grpc/_adapter/_c/types/call_credentials.c',
    'grpc/_adapter/_c/types/channel_credentials.c',
    'grpc/_adapter/_c/types/server_credentials.c',
    'grpc/_adapter/_c/types/completion_queue.c',
    'grpc/_adapter/_c/types/call.c',
    'grpc/_adapter/_c/types/channel.c',
    'grpc/_adapter/_c/types/server.c',
)

_CYTHON_EXTENSION_PACKAGE_NAMES = ()

_CYTHON_EXTENSION_MODULE_NAMES = (
    'grpc._cython.cygrpc',
    'grpc._cython._cygrpc.call',
    'grpc._cython._cygrpc.channel',
    'grpc._cython._cygrpc.completion_queue',
    'grpc._cython._cygrpc.credentials',
    'grpc._cython._cygrpc.records',
    'grpc._cython._cygrpc.server',
)

_EXTENSION_INCLUDE_DIRECTORIES = (
    '.',
)

_EXTENSION_LIBRARIES = (
    'grpc',
    'gpr',
)
if not "darwin" in sys.platform:
    _EXTENSION_LIBRARIES += ('rt',)


_C_EXTENSION_MODULE = _core.Extension(
    'grpc._adapter._c', sources=list(_C_EXTENSION_SOURCES),
    include_dirs=list(_EXTENSION_INCLUDE_DIRECTORIES),
    libraries=list(_EXTENSION_LIBRARIES),
)
_EXTENSION_MODULES = [_C_EXTENSION_MODULE]


def cython_extensions(package_names, module_names, include_dirs, libraries,
                      build_with_cython=False):
  file_extension = 'pyx' if build_with_cython else 'c'
  module_files = [name.replace('.', '/') + '.' + file_extension
                  for name in module_names]
  extensions = [
      _extension.Extension(
          name=module_name, sources=[module_file],
          include_dirs=include_dirs, libraries=libraries
      ) for (module_name, module_file) in zip(module_names, module_files)
  ]
  if build_with_cython:
    import Cython.Build
    return Cython.Build.cythonize(extensions)
  else:
    return extensions

_CYTHON_EXTENSION_MODULES = cython_extensions(
    list(_CYTHON_EXTENSION_PACKAGE_NAMES), list(_CYTHON_EXTENSION_MODULE_NAMES),
    list(_EXTENSION_INCLUDE_DIRECTORIES), list(_EXTENSION_LIBRARIES),
    bool(_BUILD_WITH_CYTHON))

_PACKAGES = setuptools.find_packages('.')

_PACKAGE_DIRECTORIES = {
    '': '.',
}

_INSTALL_REQUIRES = (
    'enum34>=1.0.4',
    'futures>=2.2.0',
)

_SETUP_REQUIRES = (
    'sphinx>=1.3',
) + _INSTALL_REQUIRES

_COMMAND_CLASS = {
    'doc': commands.SphinxDocumentation,
    'build_project_metadata': commands.BuildProjectMetadata,
    'build_py': commands.BuildPy,
}

setuptools.setup(
    name='grpcio',
    version='0.11.0b1',
    ext_modules=_EXTENSION_MODULES + _CYTHON_EXTENSION_MODULES,
    packages=list(_PACKAGES),
    package_dir=_PACKAGE_DIRECTORIES,
    install_requires=_INSTALL_REQUIRES,
    setup_requires=_SETUP_REQUIRES,
    cmdclass=_COMMAND_CLASS
)