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

# 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/>.

"""

kallithea.model.comment

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

comments model for Kallithea

This file was forked by the Kallithea project in July 2014.

Original author and date, and relevant copyright and licensing information is below:

:created_on: Nov 11, 2011

:author: marcink

:copyright: (c) 2013 RhodeCode GmbH, and others.

:license: GPLv3, see LICENSE.md for more details.

"""

import logging

from pylons.i18n.translation import _

from sqlalchemy.util.compat import defaultdict

from kallithea.lib.utils2 import extract_mentioned_users, safe_unicode

from kallithea.lib import helpers as h

from kallithea.model import BaseModel

from kallithea.model.db import ChangesetComment, User, \

    Notification, PullRequest

from kallithea.model.notification import NotificationModel

from kallithea.model.meta import Session

log = logging.getLogger(__name__)

class ChangesetCommentsModel(BaseModel):

    cls = ChangesetComment

    def __get_changeset_comment(self, changeset_comment):

        return self._get_instance(ChangesetComment, changeset_comment)

    def __get_pull_request(self, pull_request):

        return self._get_instance(PullRequest, pull_request)

    def _extract_mentions(self, s):

        user_objects = []

        for username in extract_mentioned_users(s):

            user_obj = User.get_by_username(username, case_insensitive=True)

            if user_obj:

                user_objects.append(user_obj)

        return user_objects

    def _get_notification_data(self, repo, comment, user, comment_text,

                               line_no=None, revision=None, pull_request=None,

                               status_change=None, closing_pr=False):

        """

        Get notification data

        :param comment_text:

        :param line:

        :returns: tuple (subj,body,recipients,notification_type,email_kwargs)

        """

        # make notification

        body = comment_text  # text of the comment

        line = ''

        if line_no:

            line = _('on line %s') % line_no

        #changeset

        if revision:

            notification_type = Notification.TYPE_CHANGESET_COMMENT

            cs = repo.scm_instance.get_changeset(revision)

            desc = "%s" % (cs.short_id)

            threading = ['%s-rev-%s@%s' % (repo.repo_name, revision, h.canonical_hostname())]

            if line_no: # TODO: url to file _and_ line number

                threading.append('%s-rev-%s-line-%s@%s' % (repo.repo_name, revision, line_no,

                                                           h.canonical_hostname()))

            comment_url = h.canonical_url('changeset_home',

                repo_name=repo.repo_name,

                revision=revision,

                anchor='comment-%s' % comment.comment_id)

            subj = safe_unicode(

                h.link_to('Re changeset: %(desc)s %(line)s' % \

                          {'desc': desc, 'line': line},

                          comment_url)

            )

            # get the current participants of this changeset

            recipients = ChangesetComment.get_users(revision=revision)

            # add changeset author if it's in kallithea system

            cs_author = User.get_from_cs_author(cs.author)

            if not cs_author:

                #use repo owner if we cannot extract the author correctly

                cs_author = repo.user

            recipients += [cs_author]

            email_kwargs = {

                'status_change': status_change,

                'cs_target_repo': h.canonical_url('summary_home', repo_name=repo.repo_name),

                'cs_comment_url': comment_url,

                'raw_id': revision,

                'message': cs.message,

                'repo_name': repo.repo_name,

                'short_id': h.short_id(revision),

                'branch': cs.branch,

                'comment_username': user.username,

                'threading': threading,

            }

        #pull request

        elif pull_request:

            notification_type = Notification.TYPE_PULL_REQUEST_COMMENT

            desc = comment.pull_request.title

            _org_ref_type, org_ref_name, _org_rev = comment.pull_request.org_ref.split(':')

            threading = ['%s-pr-%s@%s' % (pull_request.other_repo.repo_name,

                                          pull_request.pull_request_id,

                                          h.canonical_hostname())]

            if line_no: # TODO: url to file _and_ line number

                threading.append('%s-pr-%s-line-%s@%s' % (pull_request.other_repo.repo_name,

                                                          pull_request.pull_request_id, line_no,

                                                          h.canonical_hostname()))

            comment_url = pull_request.url(canonical=True,

                anchor='comment-%s' % comment.comment_id)

            subj = safe_unicode(

                h.link_to('Re pull request #%(pr_id)s: %(desc)s %(line)s' % \

                          {'desc': desc,

                           'pr_id': comment.pull_request.pull_request_id,

                           'line': line},

                          comment_url)

            )

            # get the current participants of this pull request

            recipients = ChangesetComment.get_users(pull_request_id=

                                                pull_request.pull_request_id)

            # add pull request author

            recipients += [pull_request.author]

            # add the reviewers to notification

            recipients += [x.user for x in pull_request.reviewers]

            #set some variables for email notification

            email_kwargs = {

                'pr_title': pull_request.title,

                'pr_id': pull_request.pull_request_id,

                'status_change': status_change,

                'closing_pr': closing_pr,

                'pr_comment_url': comment_url,

                'pr_target_repo': h.canonical_url('summary_home',

                                   repo_name=pull_request.other_repo.repo_name),

                'repo_name': pull_request.other_repo.repo_name,

                'ref': org_ref_name,

                'comment_username': user.username,

                'threading': threading,

            }

        return subj, body, recipients, notification_type, email_kwargs

    def create(self, text, repo, user, revision=None, pull_request=None,

               f_path=None, line_no=None, status_change=None, closing_pr=False,

               send_email=True):

        """

        Creates new comment for changeset or pull request.

        If status_change is not None this comment is associated with a

        status change of changeset or changesets associated with pull request

        :param text:

        :param repo:

        :param user:

        :param revision:

        :param pull_request: (for emails, not for comments)

        :param f_path:

        :param line_no:

        :param status_change: (for emails, not for comments)

        :param closing_pr: (for emails, not for comments)

        :param send_email: also send email

        """

        if not text:

            log.warning('Missing text for comment, skipping...')

            return

        repo = self._get_repo(repo)

        user = self._get_user(user)

        comment = ChangesetComment()

        comment.repo = repo

        comment.author = user

        comment.text = text

        comment.f_path = f_path

        comment.line_no = line_no

        if revision:

            comment.revision = revision

        elif pull_request:

            pull_request = self.__get_pull_request(pull_request)

            comment.pull_request = pull_request

        else:

            raise Exception('Please specify revision or pull_request_id')

        Session().add(comment)

        Session().flush()

        if send_email:

            (subj, body, recipients, notification_type,

             email_kwargs) = self._get_notification_data(

                                repo, comment, user,

                                comment_text=text,

                                line_no=line_no,

                                revision=revision,

                                pull_request=pull_request,

                                status_change=status_change,

                                closing_pr=closing_pr)

            email_kwargs['is_mention'] = False

            # create notification objects, and emails

            NotificationModel().create(

                created_by=user, subject=subj, body=body,

                recipients=recipients, type_=notification_type,

                email_kwargs=email_kwargs,

            )

            mention_recipients = set(self._extract_mentions(body))\

                                    .difference(recipients)

            if mention_recipients:

                email_kwargs['is_mention'] = True

                subj = _('[Mention]') + ' ' + subj

                NotificationModel().create(

                    created_by=user, subject=subj, body=body,

                    recipients=mention_recipients,

                    type_=notification_type,

                    email_kwargs=email_kwargs

                )

        return comment

    def delete(self, comment):

        """

        Deletes given comment

        :param comment_id:

        """

        comment = self.__get_changeset_comment(comment)

        Session().delete(comment)

        return comment

    def get_comments(self, repo_id, revision=None, pull_request=None):

        """

        Gets main comments based on revision or pull_request_id

        :param repo_id:

        :param revision:

        :param pull_request:

        """

        q = ChangesetComment.query()\

                .filter(ChangesetComment.repo_id == repo_id)\

                .filter(ChangesetComment.line_no == None)\

                .filter(ChangesetComment.f_path == None)

        if revision:

            q = q.filter(ChangesetComment.revision == revision)

        elif pull_request:

            pull_request = self.__get_pull_request(pull_request)

            q = q.filter(ChangesetComment.pull_request == pull_request)

        else:

            raise Exception('Please specify revision or pull_request')

        q = q.order_by(ChangesetComment.created_on)

        return q.all()

    def get_inline_comments(self, repo_id, revision=None, pull_request=None):

        q = Session().query(ChangesetComment)\

            .filter(ChangesetComment.repo_id == repo_id)\

            .filter(ChangesetComment.line_no != None)\

            .filter(ChangesetComment.f_path != None)\

            .order_by(ChangesetComment.comment_id.asc())\

        if revision:

            q = q.filter(ChangesetComment.revision == revision)

        elif pull_request:

            pull_request = self.__get_pull_request(pull_request)

            q = q.filter(ChangesetComment.pull_request == pull_request)

        else:

            raise Exception('Please specify revision or pull_request_id')

        comments = q.all()

        paths = defaultdict(lambda: defaultdict(list))

        for co in comments:

            paths[co.f_path][co.line_no].append(co)

        return paths.items()