http://www.apache.org/licenses/LICENSE-2.0

%pip install ortools

import logging, sys, inspect
from os.path import dirname, abspath
from optparse import OptionParser


def log_error_and_exit(error_message):
  logging.error(error_message)
  raise SystemExit


#try to import setuptools
try:
  from setuptools import setup, Extension
  from setuptools.command import easy_install
except ImportError:
  log_error_and_exit("""setuptools is not installed for \"""" + sys.executable +
                     """\"
Follow this link for installing instructions :
https://pypi.python.org/pypi/setuptools
make sure you use \"""" + sys.executable + """\" during the installation""")

from pkg_resources import parse_version


def notinstalled(modulename):
  return modulename + """ could not be imported for \"""" + sys.executable + """\"
Set PYTHONPATH to the output of this command \"make print-OR_TOOLS_PYTHONPATH\" before running the examples"""


def wrong_module(module_file, modulename):
  return """
The python examples are not importing the """ + modulename + """ module from the sources.
Remove the site-package that contains \"""" + module_file + """\", either manually or by using pip, and rerun this script again."""


# Returns the n_th parent of file
def n_dirname(n, file):
  directory = file
  for x in range(0, n):
    directory = dirname(directory)
  return directory


parser = OptionParser("Log level")
parser.add_option(
    "-l",
    "--log",
    type="string",
    help=
    "Available levels are CRITICAL (3), ERROR (2), WARNING (1), INFO (0), DEBUG (-1)",
    default="INFO")
options, args = parser.parse_args()

try:
  loglevel = getattr(logging, options.log.upper())
except AttributeError:
  loglevel = {
      3: logging.CRITICAL,
      2: logging.ERROR,
      1: logging.WARNING,
      0: logging.INFO,
      -1: logging.DEBUG,
  }[int(options.log)]

logging.basicConfig(
    format="[%(levelname)s] %(message)s", stream=sys.stdout, level=loglevel)

logging.info("Python path : " + sys.executable)
logging.info("Python version : " + sys.version)
logging.info("sys.path : " + str(sys.path))
ortools_project_path = n_dirname(
    3, abspath(inspect.getfile(inspect.currentframe())))

#try to import ortools
try:
  import ortools
except ImportError:
  logging.error(notinstalled("ortools"))
  raise SystemExit

#check if we're using ortools from the sources or it's binded by pypi's module
ortools_module_file = inspect.getfile(ortools)
ortools_module_path = n_dirname(3, ortools_module_file)
if (ortools_module_path == ortools_project_path):
  logging.info("Or-tools is imported from : " + ortools_module_file)
else:
  log_error_and_exit(wrong_module(ortools_module_file, "ortools"))

# Check if python can load the libraries' modules
# this is useful when the library architecture is not compatbile with the python executable,
# or when the library's dependencies are not available or not compatible.
from ortools.constraint_solver import _pywrapcp
from ortools.linear_solver import _pywraplp
from ortools.algorithms import _pywrapknapsack_solver
from ortools.graph import _pywrapgraph

#try to import protobuf
try:
  import google.protobuf
except ImportError:
  log_error_and_exit(notinstalled("protobuf"))

#check if we're using protobuf from the sources or it's binded by pypi's module
protobuf_module_file = inspect.getfile(google.protobuf)
protobuf_module_path = n_dirname(7, protobuf_module_file)
if (protobuf_module_path == ortools_project_path):
  logging.info("Protobuf is imported from : " + protobuf_module_file)
else:
  log_error_and_exit(wrong_module(protobuf_module_file, "protobuf"))

#Check if the protobuf modules were successfully generated
from google.protobuf import descriptor as _descriptor
from google.protobuf import descriptor_pb2