from .models import Job, User, Corpus
from . import db
import logging


'''
' A list of background process functions. Functions should be called using the
  Thread class from the module threading.
'''


def background_delete_user(app, current_user_id):
    with app.app_context():
        logger = logging.getLogger(__name__)
        logger.warning('Called by delete_thread.')
        logger.warning('User id is: {}.'.format(current_user_id))
        jobs = Job.query.filter_by(user_id=current_user_id).all()
        corpora = Corpus.query.filter_by(user_id=current_user_id).all()
        logger.warning('Jobs to delete are: {}'.format(jobs))
        user = User.query.get_or_404(current_user_id)
        for job in jobs:
            job.flag_for_stop()
            logger.warning('Job status: {}'.format(job.status))
            deleted = False
            while deleted is False:
                logger.warning('Refreshing')
                db.session.refresh(job)
                logger.warning('Refreshed')
                if job.status == 'deleted':
                    logger.warning('Job status is deleted.')
                    job.delete_job()
                    deleted = True
            logger.warning('Job deletion loop has ended.')
        for corpus in corpora:
            corpus.delete_corpus()
            logger.warning('Corpus deletion loop has ended.')
        user.delete_user()


def background_delete_job(app, job_id):
    logger = logging.getLogger(__name__)
    with app.app_context():
        logger.warning('Called by delete_thread.')
        logger.warning('Job id is: {}.'.format(job_id))
        job = Job.query.filter_by(id=job_id).first()
        logger.warning('Job object is: {}'.format(job))
        logger.warning('Job status: {}'.format(job.status))
        job.flag_for_stop()
        logger.warning('Job status: {}'.format(job.status))
        deleted = False
        while deleted is False:
            db.session.refresh(job)
            if job.status == 'deleted':
                logger.warning('Job status is deleted.')
                job.delete_job()
                deleted = True
        logger.warning('Loop has ended.')


def background_delete_corpus(app, corpus_id):
    logger = logging.getLogger(__name__)
    with app.app_context():
        logger.warning('Called by delete_thread.')
        logger.warning('Corpus id is: {}.'.format(corpus_id))
        corpus = Corpus.query.filter_by(id=corpus_id).first()
        corpus.delete()