"""distutils.command.register

Implements the Distutils 'register' command (register with the repository).
"""

# created 2002/10/21, Richard Jones

import getpass
import io
import logging
import urllib.parse
import urllib.request
from distutils._log import log
from warnings import warn

from .._itertools import always_iterable
from ..core import PyPIRCCommand


class register(PyPIRCCommand):
    description = "register the distribution with the Python package index"
    user_options = PyPIRCCommand.user_options + [
        ('list-classifiers', None, 'list the valid Trove classifiers'),
        (
            'strict',
            None,
            'Will stop the registering if the meta-data are not fully compliant',
        ),
    ]
    boolean_options = PyPIRCCommand.boolean_options + [
        'verify',
        'list-classifiers',
        'strict',
    ]

    sub_commands = [('check', lambda self: True)]

    def initialize_options(self):
        PyPIRCCommand.initialize_options(self)
        self.list_classifiers = 0
        self.strict = 0

    def finalize_options(self):
        PyPIRCCommand.finalize_options(self)
        # setting options for the `check` subcommand
        check_options = {
            'strict': ('register', self.strict),
            'restructuredtext': ('register', 1),
        }
        self.distribution.command_options['check'] = check_options

    def run(self):
        self.finalize_options()
        self._set_config()

        # Run sub commands
        for cmd_name in self.get_sub_commands():
            self.run_command(cmd_name)

        if self.dry_run:
            self.verify_metadata()
        elif self.list_classifiers:
            self.classifiers()
        else:
            self.send_metadata()

    def check_metadata(self):
        """Deprecated API."""
        warn(
            "distutils.command.register.check_metadata is deprecated; "
            "use the check command instead",
            DeprecationWarning,
        )
        check = self.distribution.get_command_obj('check')
        check.ensure_finalized()
        check.strict = self.strict
        check.restructuredtext = 1
        check.run()

    def _set_config(self):
        """Reads the configuration file and set attributes."""
        config = self._read_pypirc()
        if config != {}:
            self.username = config['username']
            self.password = config['password']
            self.repository = config['repository']
            self.realm = config['realm']
            self.has_config = True
        else:
            if self.repository not in ('pypi', self.DEFAULT_REPOSITORY):
                raise ValueError('%s not found in .pypirc' % self.repository)
            if self.repository == 'pypi':
                self.repository = self.DEFAULT_REPOSITORY
            self.has_config = False

    def classifiers(self):
        """Fetch the list of classifiers from the server."""
        url = self.repository + '?:action=list_classifiers'
        response = urllib.request.urlopen(url)
        log.info(self._read_pypi_response(response))

    def verify_metadata(self):
        """Send the metadata to the package index server to be checked."""
        # send the info to the server and report the result
        (code, result) = self.post_to_server(self.build_post_data('verify'))
        log.info('Server response (%s): %s', code, result)

    def send_metadata(self):  # noqa: C901
        """Send the metadata to the package index server.

        Well, do the following:
        1. figure who the user is, and then
        2. send the data as a Basic auth'ed POST.

        First we try to read the username/password from $HOME/.pypirc,
        which is a ConfigParser-formatted file with a section
        [distutils] containing username and password entries (both
        in clear text). Eg:

            [distutils]
            index-servers =
                pypi

            [pypi]
            username: fred
            password: sekrit

        Otherwise, to figure who the user is, we offer the user three
        choices:

         1. use existing login,
         2. register as a new user, or
         3. set the password to a random string and email the user.

        """
        # see if we can short-cut and get the username/password from the
        # config
        if self.has_config:
            choice = '1'
            username = self.username
            password = self.password
        else:
            choice = 'x'
            username = password = ''

        # get the user's login info
        choices = '1 2 3 4'.split()
        while choice not in choices:
            self.announce(
                """\
We need to know who you are, so please choose either:
 1. use your existing login,
 2. register as a new user,
 3. have the server generate a new password for you (and email it to you), or
 4. quit
Your selection [default 1]: """,
                logging.INFO,
            )
            choice = input()
            if not choice:
                choice = '1'
            elif choice not in choices:
                print('Please choose one of the four options!')

        if choice == '1':
            # get the username and password
            while not username:
                username = input('Username: ')
            while not password:
                password = getpass.getpass('Password: ')

            # set up the authentication
            auth = urllib.request.HTTPPasswordMgr()
            host = urllib.parse.urlparse(self.repository)[1]
            auth.add_password(self.realm, host, username, password)
            # send the info to the server and report the result
            code, result = self.post_to_server(self.build_post_data('submit'), auth)
            self.announce(f'Server response ({code}): {result}', logging.INFO)

            # possibly save the login
            if code == 200:
                if self.has_config:
                    # sharing the password in the distribution instance
                    # so the upload command can reuse it
                    self.distribution.password = password
                else:
                    self.announce(
                        (
                            'I can store your PyPI login so future '
                            'submissions will be faster.'
                        ),
                        logging.INFO,
                    )
                    self.announce(
                        '(the login will be stored in %s)' % self._get_rc_file(),
                        logging.INFO,
                    )
                    choice = 'X'
                    while choice.lower() not in 'yn':
                        choice = input('Save your login (y/N)?')
                        if not choice:
                            choice = 'n'
                    if choice.lower() == 'y':
                        self._store_pypirc(username, password)

        elif choice == '2':
            data = {':action': 'user'}
            data['name'] = data['password'] = data['email'] = ''
            data['confirm'] = None
            while not data['name']:
                data['name'] = input('Username: ')
            while data['password'] != data['confirm']:
                while not data['password']:
                    data['password'] = getpass.getpass('Password: ')
                while not data['confirm']:
                    data['confirm'] = getpass.getpass(' Confirm: ')
                if data['password'] != data['confirm']:
                    data['password'] = ''
                    data['confirm'] = None
                    print("Password and confirm don't match!")
            while not data['email']:
                data['email'] = input('   EMail: ')
            code, result = self.post_to_server(data)
            if code != 200:
                log.info('Server response (%s): %s', code, result)
            else:
                log.info('You will receive an email shortly.')
                log.info('Follow the instructions in it to ' 'complete registration.')
        elif choice == '3':
            data = {':action': 'password_reset'}
            data['email'] = ''
            while not data['email']:
                data['email'] = input('Your email address: ')
            code, result = self.post_to_server(data)
            log.info('Server response (%s): %s', code, result)

    def build_post_data(self, action):
        # figure the data to send - the metadata plus some additional
        # information used by the package server
        meta = self.distribution.metadata
        data = {
            ':action': action,
            'metadata_version': '1.0',
            'name': meta.get_name(),
            'version': meta.get_version(),
            'summary': meta.get_description(),
            'home_page': meta.get_url(),
            'author': meta.get_contact(),
            'author_email': meta.get_contact_email(),
            'license': meta.get_licence(),
            'description': meta.get_long_description(),
            'keywords': meta.get_keywords(),
            'platform': meta.get_platforms(),
            'classifiers': meta.get_classifiers(),
            'download_url': meta.get_download_url(),
            # PEP 314
            'provides': meta.get_provides(),
            'requires': meta.get_requires(),
            'obsoletes': meta.get_obsoletes(),
        }
        if data['provides'] or data['requires'] or data['obsoletes']:
            data['metadata_version'] = '1.1'
        return data

    def post_to_server(self, data, auth=None):  # noqa: C901
        """Post a query to the server, and return a string response."""
        if 'name' in data:
            self.announce(
                'Registering {} to {}'.format(data['name'], self.repository),
                logging.INFO,
            )
        # Build up the MIME payload for the urllib2 POST data
        boundary = '--------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
        sep_boundary = '\n--' + boundary
        end_boundary = sep_boundary + '--'
        body = io.StringIO()
        for key, values in data.items():
            for value in map(str, make_iterable(values)):
                body.write(sep_boundary)
                body.write('\nContent-Disposition: form-data; name="%s"' % key)
                body.write("\n\n")
                body.write(value)
                if value and value[-1] == '\r':
                    body.write('\n')  # write an extra newline (lurve Macs)
        body.write(end_boundary)
        body.write("\n")
        body = body.getvalue().encode("utf-8")

        # build the Request
        headers = {
            'Content-type': 'multipart/form-data; boundary=%s; charset=utf-8'
            % boundary,
            'Content-length': str(len(body)),
        }
        req = urllib.request.Request(self.repository, body, headers)

        # handle HTTP and include the Basic Auth handler
        opener = urllib.request.build_opener(
            urllib.request.HTTPBasicAuthHandler(password_mgr=auth)
        )
        data = ''
        try:
            result = opener.open(req)
        except urllib.error.HTTPError as e:
            if self.show_response:
                data = e.fp.read()
            result = e.code, e.msg
        except urllib.error.URLError as e:
            result = 500, str(e)
        else:
            if self.show_response:
                data = self._read_pypi_response(result)
            result = 200, 'OK'
        if self.show_response:
            msg = '\n'.join(('-' * 75, data, '-' * 75))
            self.announce(msg, logging.INFO)
        return result


def make_iterable(values):
    if values is None:
        return [None]
    return always_iterable(values)
