import shlex
import sys
from subprocess import Popen, PIPE

import importlib_resources
import pkg_resources
from importlib_resources import path
from ipython_genutils.py3compat import string_types, bytes_to_str


# taken from https://github.com/jupyter/nbconvert/blob/master/nbconvert/tests/base.py
def run_python(parameters, ignore_return_code=False, stdin=None):
    """
    Run python as a shell command, listening for both Errors and
    non-zero return codes. Returns the tuple (stdout, stderr) of
    output produced during the nbconvert run.
    Parameters
    ----------
    parameters : str, list(str)
        List of parameters to pass to IPython.
    ignore_return_code : optional bool (default False)
        Throw an OSError if the return code
    """
    cmd = [sys.executable]
    if sys.platform == 'win32':
        if isinstance(parameters, string_types):
            cmd = ' '.join(cmd) + ' ' + parameters
        else:
            cmd = ' '.join(cmd + parameters)
    else:
        if isinstance(parameters, string_types):
            parameters = shlex.split(parameters)
        cmd += parameters
    p = Popen(cmd, stdout=PIPE, stderr=PIPE, stdin=PIPE)
    stdout, stderr = p.communicate(input=stdin)
    if not (p.returncode == 0 or ignore_return_code):
        raise OSError(bytes_to_str(stderr))
    return stdout.decode('utf8', 'replace'), stderr.decode('utf8', 'replace')


for entry in [entry for entry in importlib_resources.contents('notebooks') if
              not pkg_resources.resource_isdir('notebooks', entry)
              and entry.endswith(".ipynb")
              ]:
    print("*****************************************************************")
    print("Converting and running {}".format(entry))
    print("*****************************************************************")

    with path('notebooks', entry) as file_in:
        out, err = run_python(" -m jupyter nbconvert --execute --to notebook --inplace " + str(file_in))
        sys.stderr.write(err)
        sys.stderr.flush()
        sys.stdout.write(out)
        sys.stdout.flush()