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import logging
import argparse

from ming.odm import session
from allura.model import main_orm_session, main_explicitflush_orm_session

from allura.scripts import ScriptTask
from allura import model as M
from allura.lib.utils import chunked_find

log = logging.getLogger('allura.scripts.set_default_user_notifications')


class SetDefaultUserMentions(ScriptTask):

    @classmethod
    def parser(cls):
        return argparse.ArgumentParser(description="Set default user notifications option for existing users.  ")

    @classmethod
    def execute(cls, options):
        for i, chunk in enumerate(chunked_find(M.User, {})):
            log.info('Adding default setting for chunk #%s', i)
            for u in chunk:
                try:
                    u.set_pref('mention_notifications', True)
                    session(u).flush(u)
                except Exception:
                    log.exception('Error processing on user %s', u)

            main_orm_session.clear()  # AuditLog and User objs
            main_explicitflush_orm_session.clear()  # UserLoginDetails objs, already flushed individually

        log.info('Finished adding default user notification setting')


if __name__ == '__main__':
    SetDefaultUserMentions.main()