from datetime import datetime

from sanic import Sanic
from sanic.response import text, json
from sanic.views import HTTPMethodView


class IndexView(HTTPMethodView):
    def get(self, request):
        now = datetime.utcnow()
        return text(now.strftime('%Y-%m-%d %H:%M:%S'))


class JsonView(HTTPMethodView):
    def get(self, request):
        now = datetime.utcnow()
        return json({
            'now': now.strftime('%Y-%m-%d %H:%M:%S'),
            'timestamp': int(datetime.timestamp(now)),
        })


class Application(object):
    app = Sanic()

    def __init__(self, args):
        self.args = args
        self.app.add_route(IndexView.as_view(), '/')
        self.app.add_route(JsonView.as_view(), '/json')

    def run(self):
        self.app.run(host=self.args.interface, port=self.args.port)


if __name__ == '__main__':
    import os
    from argparse import ArgumentParser

    default_host = os.environ.get('APP_HOST', '0.0.0.0')
    default_port = int(os.environ.get('APP_PORT', 8080))
    default_trusted = os.environ.get('TRUSTED_PROXIES') or None

    parser = ArgumentParser('app.py')
    parser.add_argument('--interface', '-i', type=str, help='Interface to listen on', default=default_host)
    parser.add_argument('--port', '-p', type=int, help='Port to listen on', default=default_port)
    parser.add_argument('--proxies', type=str, help='A list of trusted proxies, comma separated. you can use CIDRs.', default=default_trusted)
    args = parser.parse_args()

    zero_if = Application(args)
    zero_if.run()