# -*- coding: utf-8 -*-

"""

    package.rhodecode.lib.cleanup

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    :created_on: Jul 14, 2012

    :author: marcink

    :copyright: (C) 2010-2012 Marcin Kuzminski <marcin@python-works.com>

    :license: GPLv3, see COPYING for more details.

"""

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from __future__ import with_statement

import os

import sys

import re

import shutil

import logging

import datetime

from os.path import dirname as dn, join as jn

from rhodecode.model import init_model

from rhodecode.lib.utils2 import engine_from_config

from rhodecode.model.db import RhodeCodeUi

#to get the rhodecode import

sys.path.append(dn(dn(dn(os.path.realpath(__file__)))))

from rhodecode.lib.utils import BasePasterCommand, Command, ask_ok,\

    REMOVED_REPO_PAT, add_cache

log = logging.getLogger(__name__)

class CleanupCommand(BasePasterCommand):

    max_args = 1

    min_args = 1

    usage = "CONFIG_FILE"

    summary = "Cleanup deleted repos"

    group_name = "RhodeCode"

    takes_config_file = -1

    parser = Command.standard_parser(verbose=True)

    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 milisecods

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

    def command(self):

        logging.config.fileConfig(self.path_to_ini_file)

        from pylons import config

        #get to remove repos !!

        add_cache(config)

        engine = engine_from_config(config, 'sqlalchemy.db1.')

        init_model(engine)

        repos_location = RhodeCodeUi.get_repos_location()

        to_remove = []

        for loc in os.listdir(repos_location):

            if REMOVED_REPO_PAT.match(loc):

                to_remove.append([loc, self._extract_date(loc)])

        #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 >> sys.stdout, 'removing [%s] deleted repos older than %s[%s]' \

                % (len(to_remove), older_than, older_than_date)

        else:

            print >> sys.stdout, '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('are you sure to remove listed repos \n%s [y/n]?'

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

                                           for x in to_remove]))

        if remove:

            for name, date_ in to_remove:

                print >> sys.stdout, 'removing repository %s' % name

                shutil.rmtree(os.path.join(repos_location, name))

        else:

            print 'nothing done exiting...'

            sys.exit(0)

    def update_parser(self):

        self.parser.add_option('--older-than',

                          action='store',

                          dest='older_than',

                          help=(

                            "only remove repos that have been removed "

                            "at least given time ago "

                            "ex. --older-than=30d deletes repositores "

                            "removed more than 30days ago. Possible options "

                            "d[ays]/h[ours]/m[inutes]/s[seconds]. OPTIONAL"),

                          )

        self.parser.add_option('--dont-ask',

                               action='store_true',

                               dest='dont_ask',

                               help=("Don't ask to remove repos"))

    cleanup-repos=rhodecode.lib.cleanup:CleanupCommand