# -*- 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.pull_request

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

pull request 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: Jun 6, 2012

:author: marcink

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

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

"""

import logging

import datetime

from pylons.i18n.translation import _

from kallithea.model.meta import Session

from kallithea.lib import helpers as h

from kallithea.model import BaseModel

from kallithea.model.db import PullRequest, PullRequestReviewers, Notification,\

    ChangesetStatus

from kallithea.model.notification import NotificationModel

from kallithea.lib.utils2 import safe_unicode

log = logging.getLogger(__name__)

class PullRequestModel(BaseModel):

    cls = PullRequest

    def __get_pull_request(self, pull_request):

        return self._get_instance(PullRequest, pull_request)

    def get_pullrequest_cnt_for_user(self, user):

        return PullRequest.query()\

                                .join(PullRequestReviewers)\

                                .filter(PullRequestReviewers.user_id == user)\

                                .filter(PullRequest.status != PullRequest.STATUS_CLOSED)\

                                .count()

    def get_all(self, repo_name, from_=False, closed=False):

        """Get all PRs for repo.

        Default is all PRs to the repo, PRs from the repo if from_.

        Closed PRs are only included if closed is true."""

        repo = self._get_repo(repo_name)

        q = PullRequest.query()

        if from_:

            q = q.filter(PullRequest.org_repo == repo)

        else:

            q = q.filter(PullRequest.other_repo == repo)

        if not closed:

            q = q.filter(PullRequest.status != PullRequest.STATUS_CLOSED)

        return q.order_by(PullRequest.created_on.desc()).all()

    def create(self, created_by, org_repo, org_ref, other_repo, other_ref,

               revisions, reviewers, title, description=None):

        from kallithea.model.changeset_status import ChangesetStatusModel

        created_by_user = self._get_user(created_by)

        org_repo = self._get_repo(org_repo)

        other_repo = self._get_repo(other_repo)

        new = PullRequest()

        new.org_repo = org_repo

        new.org_ref = org_ref

        new.other_repo = other_repo

        new.other_ref = other_ref

        new.revisions = revisions

        new.title = title

        new.description = description

        new.author = created_by_user

        Session().add(new)

        Session().flush()

        #reset state to under-review

        ChangesetStatusModel().set_status(

            repo=org_repo,

            status=ChangesetStatus.STATUS_UNDER_REVIEW,

            pull_request=new

        )

        revision_data = [(x.raw_id, x.message)

        #notification to reviewers

        subject = safe_unicode(

            h.link_to(

              _('%(user)s wants you to review pull request #%(pr_id)s: %(pr_title)s') % \

        )

        kwargs = {

                                 qualified=True,),

            'pr_url': pr_url,

                                   recipients=reviewers,

                                   type_=Notification.TYPE_PULL_REQUEST, email_kwargs=kwargs)

    def update_reviewers(self, pull_request, reviewers_ids):

        reviewers_ids = set(reviewers_ids)

        pull_request = self.__get_pull_request(pull_request)

        current_reviewers = PullRequestReviewers.query()\

                            .filter(PullRequestReviewers.pull_request==

                                   pull_request)\

                            .all()

        current_reviewers_ids = set([x.user.user_id for x in current_reviewers])

        to_add = reviewers_ids.difference(current_reviewers_ids)

        to_remove = current_reviewers_ids.difference(reviewers_ids)

        log.debug("Adding %s reviewers" % to_add)

        for uid in to_remove:

            reviewer = PullRequestReviewers.query()\

                    .filter(PullRequestReviewers.user_id==uid,

                            PullRequestReviewers.pull_request==pull_request)\

                    .scalar()

            if reviewer:

                Session().delete(reviewer)

    def delete(self, pull_request):

        pull_request = self.__get_pull_request(pull_request)

        Session().delete(pull_request)

    def close_pull_request(self, pull_request):

        pull_request = self.__get_pull_request(pull_request)

        pull_request.status = PullRequest.STATUS_CLOSED

        pull_request.updated_on = datetime.datetime.now()

        Session().add(pull_request)