"""

import logging

import traceback

from collections import defaultdict

from pylons import tmpl_context as c, request, response

from pylons.i18n.translation import _

from webob.exc import HTTPFound, HTTPForbidden, HTTPBadRequest, HTTPNotFound

from kallithea.lib.utils import jsonify

from kallithea.lib.vcs.exceptions import RepositoryError, \

from kallithea.lib.compat import json

import kallithea.lib.helpers as h

from kallithea.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator, \

    NotAnonymous

from kallithea.lib.base import BaseRepoController, render

from kallithea.lib.utils import action_logger

from kallithea.lib.compat import OrderedDict

from kallithea.lib import diffs

from kallithea.model.db import ChangesetComment, ChangesetStatus

from kallithea.model.comment import ChangesetCommentsModel

from kallithea.model.changeset_status import ChangesetStatusModel

                enable_comments = False

                rev_start = rev_range[0]

                rev_end = rev_range[1]

                rev_ranges = c.db_repo_scm_instance.get_changesets(start=rev_start,

                                                             end=rev_end)

            else:

                rev_ranges = [c.db_repo_scm_instance.get_changeset(revision)]

            c.cs_ranges = list(rev_ranges)

            if not c.cs_ranges:

                raise RepositoryError('Changeset range returned empty result')

            log.debug(traceback.format_exc())

            msg = _('Such revision does not exist for this repository')

            h.flash(msg, category='error')

            raise HTTPNotFound()

        c.changes = OrderedDict()

        c.lines_added = 0  # count of lines added

        c.lines_deleted = 0  # count of lines removes

        c.changeset_statuses = ChangesetStatus.STATUSES

        comments = dict()