"""distutils.pypirc

Provides the PyPIRCCommand class, the base class for the command classes
that uses .pypirc in the distutils.command package.
"""
import os
import sys
try:
    from configparser import ConfigParser
except ImportError:
    # For backward-compatibility with Python versions < 2.6.
    from ConfigParser import ConfigParser

from distutils.cmd import Command

DEFAULT_PYPIRC = """\
[pypirc]
servers =
    pypi

[pypi]
username:%s
password:%s
"""

class PyPIRCCommand(Command):
    """Base command that knows how to handle the .pypirc file
    """
    DEFAULT_REPOSITORY = 'http://pypi.python.org/pypi'
    DEFAULT_REALM = 'pypi'
    repository = None
    realm = None

    user_options = [
        ('repository=', 'r',
         "url of repository [default: %s]" % \
            DEFAULT_REPOSITORY),
        ('show-response', None,
         'display full response text from server')]

    boolean_options = ['show-response']

    def _get_rc_file(self):
        """Returns rc file path."""
        return os.path.join(os.path.expanduser('~'), '.pypirc')

    def _store_pypirc(self, username, password):
        """Creates a default .pypirc file."""
        rc = self._get_rc_file()
        f = open(rc, 'w')
        try:
            f.write(DEFAULT_PYPIRC % (username, password))
        finally:
            f.close()
        try:
            os.chmod(rc, 0600)
        except OSError:
            # should do something better here
            pass

    def _read_pypirc(self):
        """Reads the .pypirc file."""
        rc = self._get_rc_file()
        if os.path.exists(rc):
            print 'Using PyPI login from %s' % rc
            repository = self.repository or self.DEFAULT_REPOSITORY
            realm = self.realm or self.DEFAULT_REALM

            config = ConfigParser()
            config.read(rc)
            sections = config.sections()
            if 'distutils' in sections:
                # let's get the list of servers
                index_servers = config.get('distutils', 'index-servers')
                _servers = [server.strip() for server in
                            index_servers.split('\n')
                            if server.strip() != '']
                if _servers == []:
                    # nothing set, let's try to get the default pypi
                    if 'pypi' in sections:
                        _servers = ['pypi']
                    else:
                        # the file is not properly defined, returning
                        # an empty dict
                        return {}
                for server in _servers:
                    current = {'server': server}
                    current['username'] = config.get(server, 'username')
                    current['password'] = config.get(server, 'password')

                    # optional params
                    for key, default in (('repository',
                                          self.DEFAULT_REPOSITORY),
                                         ('realm', self.DEFAULT_REALM)):
                        if config.has_option(server, key):
                            current[key] = config.get(server, key)
                        else:
                            current[key] = default
                    if (current['server'] == repository or
                        current['repository'] == repository):
                        return current
            elif 'server-login' in sections:
                # old format
                server = 'server-login'
                if config.has_option(server, 'repository'):
                    repository = config.get(server, 'repository')
                else:
                    repository = self.DEFAULT_REPOSITORY
                return {'username': config.get(server, 'username'),
                        'password': config.get(server, 'password'),
                        'repository': repository,
                        'server': server,
                        'realm': self.DEFAULT_REALM}

        return {}

    def initialize_options(self):
        """Initialize options."""
        self.repository = None
        self.realm = None
        self.show_response = 0

    def finalize_options(self):
        """Finalizes options."""
        if self.repository is None:
            self.repository = self.DEFAULT_REPOSITORY
        if self.realm is None:
            self.realm = self.DEFAULT_REALM