# -*- coding: utf-8 -*-
"""
    rhodecode.model.changeset_status
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


    :created_on: Apr 30, 2012
    :author: marcink
    :copyright: (C) 2011-2012 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/>.


import logging

from rhodecode.model import BaseModel
from rhodecode.model.db import ChangesetStatus, PullRequest

log = logging.getLogger(__name__)


class ChangesetStatusModel(BaseModel):

    def __get_changeset_status(self, changeset_status):
        return self._get_instance(ChangesetStatus, changeset_status)

    def __get_pull_request(self, pull_request):
        return self._get_instance(PullRequest, pull_request)

    def get_status(self, repo, revision=None, pull_request=None):
        """
        Returns latest status of changeset for given revision or for given
        pull request. Statuses are versioned inside a table itself and
        version == 0 is always the current one

        :param repo:
        :type repo:
        :param revision: 40char hash or None
        :type revision: str
        :param pull_request: pull_request reference
        :type:
        """
        repo = self._get_repo(repo)

        q = ChangesetStatus.query()\
            .filter(ChangesetStatus.repo == repo)\
            .filter(ChangesetStatus.version == 0)

        if revision:
            q = q.filter(ChangesetStatus.revision == revision)
        elif pull_request:
            pull_request = self.__get_pull_request(pull_request)
            q = q.filter(ChangesetStatus.pull_request == pull_request)
        else:
            raise Exception('Please specify revision or pull_request')

        # need to use first here since there can be multiple statuses
        # returned from pull_request
        status = q.first()
        status = status.status if status else status
        st = status or ChangesetStatus.DEFAULT
        return str(st)

    def set_status(self, repo, status, user, comment, revision=None,
                   pull_request=None):
        """
        Creates new status for changeset or updates the old ones bumping their
        version, leaving the current status at

        :param repo:
        :type repo:
        :param revision:
        :type revision:
        :param status:
        :type status:
        :param user:
        :type user:
        :param comment:
        :type comment:
        """
        repo = self._get_repo(repo)

        q = ChangesetStatus.query()

        if revision:
            q = q.filter(ChangesetStatus.repo == repo)
            q = q.filter(ChangesetStatus.revision == revision)
        elif pull_request:
            pull_request = self.__get_pull_request(pull_request)
            q = q.filter(ChangesetStatus.repo == pull_request.org_repo)
            q = q.filter(ChangesetStatus.pull_request == pull_request)
        cur_statuses = q.all()

        if cur_statuses:
            for st in cur_statuses:
                st.version += 1
                self.sa.add(st)

        def _create_status(user, repo, status, comment, revision, pull_request):
            new_status = ChangesetStatus()
            new_status.author = self._get_user(user)
            new_status.repo = self._get_repo(repo)
            new_status.status = status
            new_status.comment = comment
            new_status.revision = revision
            new_status.pull_request = pull_request
            return new_status

        if revision:
            new_status = _create_status(user=user, repo=repo, status=status,
                           comment=comment, revision=revision, 
                           pull_request=None)
            self.sa.add(new_status)
            return new_status
        elif pull_request:
            #pull request can have more than one revision associated to it
            #we need to create new version for each one
            new_statuses = []
            repo = pull_request.org_repo
            for rev in pull_request.revisions:
                new_status = _create_status(user=user, repo=repo,
                                            status=status, comment=comment,
                                            revision=rev,
                                            pull_request=pull_request)
                new_statuses.append(new_status)
                self.sa.add(new_status)
            return new_statuses