# source: http://docs.gunicorn.org/en/stable/custom.html
from __future__ import unicode_literals

import multiprocessing

import gunicorn.app.base
from gunicorn.six import iteritems
from twootfeed import create_app, param


class StandaloneApplication(gunicorn.app.base.BaseApplication):

    def __init__(self, app, options=None):
        self.options = options or {}
        self.application = app
        super(StandaloneApplication, self).__init__()

    def load_config(self):
        config = dict([(key, value) for key, value in iteritems(self.options)
                       if key in self.cfg.settings and value is not None])
        for key, value in iteritems(config):
            self.cfg.set(key.lower(), value)

    def load(self):
        return self.application


def number_of_workers():
    return (multiprocessing.cpu_count() * 2) + 1


def main():
    app = create_app()
    options = {
        'bind': f"{param['app']['host']}:{param['app']['port']}",
        'workers': number_of_workers(),
    }
    StandaloneApplication(app, options).run()


if __name__ == '__main__':
    main()
