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"""Provides distutils command classes for the GRPC Python setup process."""

import os
import shutil

import setuptools

ROOT_DIR = os.path.abspath(os.path.dirname(os.path.abspath(__file__)))
HEALTH_PROTO = os.path.join(ROOT_DIR, '../../proto/grpc/health/v1/health.proto')


class CopyProtoModules(setuptools.Command):
    """Command to copy proto modules from grpc/src/proto."""

    description = ''
    user_options = []

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def run(self):
        if os.path.isfile(HEALTH_PROTO):
            shutil.copyfile(
                HEALTH_PROTO,
                os.path.join(ROOT_DIR, 'grpc_health/v1/health.proto'))


class BuildPackageProtos(setuptools.Command):
    """Command to generate project *_pb2.py modules from proto files."""

    description = 'build grpc protobuf modules'
    user_options = []

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def run(self):
        # due to limitations of the proto generator, we require that only *one*
        # directory is provided as an 'include' directory. We assume it's the '' key
        # to `self.distribution.package_dir` (and get a key error if it's not
        # there).
        from grpc_tools import command
        command.build_package_protos(self.distribution.package_dir[''])
