from kallithea.lib.utils import REMOVED_REPO_PAT

from kallithea.lib.utils2 import safe_str

from kallithea.model.db import Ui

class Command(BasePasterCommand):

    max_args = 1

    min_args = 1

    usage = "CONFIG_FILE"

    group_name = "Kallithea"

    takes_config_file = -1

    parser = BasePasterCommand.standard_parser(verbose=True)

    summary = "Cleanup deleted repos"

    def _parse_older_than(self, val):

        regex = re.compile(r'((?P<days>\d+?)d)?((?P<hours>\d+?)h)?((?P<minutes>\d+?)m)?((?P<seconds>\d+?)s)?')

        parts = regex.match(val)

        if not parts:

            return

        parts = parts.groupdict()

        time_params = {}

        for (name, param) in parts.iteritems():

            if param:

                time_params[name] = int(param)

        return datetime.timedelta(**time_params)

    def _extract_date(self, name):

        """

        Extract the date part from rm__<date> pattern of removed repos,

        and convert it to datetime object

        :param name:

        """

        date_part = name[4:19]  # 4:19 since we don't parse milliseconds

        return datetime.datetime.strptime(date_part, '%Y%m%d_%H%M%S')

    def command(self):

        #get SqlAlchemy session

        self._init_session()

        repos_location = Ui.get_repos_location()

        to_remove = []

        for dn_, dirs, f in os.walk(safe_str(repos_location)):

            alldirs = list(dirs)

            del dirs[:]

            if ('.hg' in alldirs or

                'objects' in alldirs and ('refs' in alldirs or 'packed-refs' in f)):

                continue

            for loc in alldirs:

                if REMOVED_REPO_PAT.match(loc):

                    to_remove.append([os.path.join(dn_, loc),

                                      self._extract_date(loc)])

                else:

                    dirs.append(loc)

            if dirs:

                print 'Scanning: %s' % dn_

        #filter older than (if present)!

        now = datetime.datetime.now()

        older_than = self.options.older_than

        if older_than:

            to_remove_filtered = []

            older_than_date = self._parse_older_than(older_than)

            for name, date_ in to_remove:

                repo_age = now - date_

                if repo_age > older_than_date:

                    to_remove_filtered.append([name, date_])

            to_remove = to_remove_filtered

            print 'Removing %s deleted repos older than %s (%s)' \

                % (len(to_remove), older_than, older_than_date)

        else:

            print 'Removing all %s deleted repos' % len(to_remove)

        if self.options.dont_ask or not to_remove:

            # don't ask just remove !

            remove = True

        else:

            remove = ask_ok('the following repositories will be deleted completely:\n%s\n'

                            'are you sure you want to remove them [y/n]?'

                            % '\n'.join(['%s removed on %s' % (safe_str(x[0]), safe_str(x[1]))

                                         for x in to_remove]))

        if remove:

            for path, date_ in to_remove:

                print 'Removing repository %s' % path

                shutil.rmtree(path)

        else:

            print 'Nothing done, exiting...'

    def update_parser(self):

        self.parser.add_option(

            '--older-than',

            action='store',

            dest='older_than',