log = logging.getLogger(__name__)

class NotificationModel(BaseModel):

    cls = Notification

    def __get_notification(self, notification):

        if isinstance(notification, Notification):

            return notification

        elif isinstance(notification, (int, long)):

            return Notification.get(notification)

        else:

            if notification:

                raise Exception('notification must be int, long or Instance'

                                ' of Notification got %s' % type(notification))

    def create(self, created_by, subject, body, recipients=None,

               type_=Notification.TYPE_MESSAGE, with_email=True,

               email_kwargs={}, email_subject=None):

        """

        Creates notification of given type

        :param created_by: int, str or User instance. User who created this

            notification

        :param subject:

        :param body:

        :param recipients: list of int, str or User objects, when None

            is given send to all admins

        :param type_: type of notification

        :param with_email: send email with this notification

        :param email_kwargs: additional dict to pass as args to email template

        :param email_subject: use given subject as email subject

        """

        from rhodecode.lib.celerylib import tasks, run_task

        if recipients and not getattr(recipients, '__iter__', False):

            raise Exception('recipients must be a list or iterable')

        created_by_obj = self._get_user(created_by)

        if recipients:

            recipients_objs = []

            for u in recipients:

                obj = self._get_user(u)

                if obj:

                    recipients_objs.append(obj)

            recipients_objs = set(recipients_objs)

            log.debug('sending notifications %s to %s' % (

                type_, recipients_objs)

            )

        else:

            # empty recipients means to all admins

            recipients_objs = User.query().filter(User.admin == True).all()

            log.debug('sending notifications %s to admins: %s' % (

                type_, recipients_objs)

            )

        notif = Notification.create(

            created_by=created_by_obj, subject=subject,

            body=body, recipients=recipients_objs, type_=type_

        )

        if not with_email:

            return notif

        #don't send email to person who created this comment

        rec_objs = set(recipients_objs).difference(set([created_by_obj]))

        # send email with notification to all other participants

        for rec in rec_objs:

            if not email_subject:

                email_subject = NotificationModel()\

                                    .make_description(notif, show_age=False)

            type_ = type_

            email_body = None  # we set body to none, we just send HTML emails

            ## this is passed into template

            kwargs = {'subject': subject, 'body': h.rst_w_mentions(body)}

            kwargs.update(email_kwargs)

            email_body_html = EmailNotificationModel()\

                                .get_email_tmpl(type_, **kwargs)

            run_task(tasks.send_email, rec.email, email_subject, email_body,

                     email_body_html)

        return notif

    def delete(self, user, notification):

        # we don't want to remove actual notification just the assignment

        try:

            notification = self.__get_notification(notification)

            user = self._get_user(user)

            if notification and user:

                obj = UserNotification.query()\

                        .filter(UserNotification.user == user)\

                        .filter(UserNotification.notification

                                == notification)\

                        .one()

                Session().delete(obj)

                return True

        except Exception:

            log.error(traceback.format_exc())

            raise

    def get_for_user(self, user, filter_=None):

        """

    cls = PullRequest

    def __get_pull_request(self, pull_request):

        return self._get_instance(PullRequest, pull_request)

    def get_all(self, repo):

        repo = self._get_repo(repo)

        return PullRequest.query()\

                .filter(PullRequest.other_repo == repo)\

                .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 rhodecode.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()

        #members

        for member in set(reviewers):

            _usr = self._get_user(member)

            reviewer = PullRequestReviewers(_usr, new)

            Session().add(reviewer)

        #reset state to under-review

        ChangesetStatusModel().set_status(

            repo=org_repo,

            status=ChangesetStatus.STATUS_UNDER_REVIEW,

            user=created_by_user,

            pull_request=new

        )

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

                         for x in map(org_repo.get_changeset, revisions)]

        #notification to reviewers

        pr_url = h.url('pullrequest_show', repo_name=other_repo.repo_name,

                       pull_request_id=new.pull_request_id,

                       qualified=True,

        )

        subject = safe_unicode(

            h.link_to(

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

                {'user': created_by_user.username,

                 'pr_title': new.title,

                 'pr_id': new.pull_request_id},

                pr_url

            )

        )

        body = description

        kwargs = {

            'pr_title': title,

            'pr_user_created': h.person(created_by_user.email),

            'pr_repo_url': h.url('summary_home', repo_name=other_repo.repo_name,

                                 qualified=True,),

            'pr_url': pr_url,

            'pr_revisions': revision_data

        }

                     recipients=reviewers,

                     type_=Notification.TYPE_PULL_REQUEST, email_kwargs=kwargs)

        return new

    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)

        log.debug("Removing %s reviewers" % to_remove)

        for uid in to_add:

            _usr = self._get_user(uid)

            reviewer = PullRequestReviewers(_usr, pull_request)

            Session().add(reviewer)

        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)