# -*- encoding: utf-8 -*-

"""
The application entrypoint.
"""

from aiohttp import web
import base64
from cryptography import fernet
import logging
import os
import typing as T

import click
from aiohttp_session import setup, session_middleware
from aiohttp_session.cookie_storage import EncryptedCookieStorage

from bot_z.async_operator import AsyncOperator
from api.rest import routes


def setup_log() -> logging.Logger:
    alog = logging.getLogger("api")
    alog.setLevel(os.environ.get("BOTZ_LOGLEVEL", logging.INFO))
    h = logging.StreamHandler()
    f = logging.Formatter("%(levelname)s [%(name)s] -> %(message)s")
    h.setFormatter(f)
    alog.addHandler(h)
    return alog


def init_secret() -> bytes:
    fernet_key = fernet.Fernet.generate_key()
    return base64.urlsafe_b64decode(fernet_key)


def setup_session(app: web.Application):
    secret = init_secret()
    setup(app, EncryptedCookieStorage(secret))


def run(address: T.Text, port: int) -> None:
    """Application entrypoint."""
    alog = setup_log()
    app = web.Application(logger=alog)
    setup_session(app)
    app.add_routes(routes)
    web.run_app(app, host=address, port=port)


@click.command()
@click.option(
    "-a",
    "--address",
    type=click.STRING,
    help="Address to bind the server to.",
    default="127.0.0.1",
)
@click.option("-p", "--port", type=click.INT, help="Port to bind to", default=3003)
def cli(address: T.Text, port: int) -> None:
    run(address, port)