"""Gunicorn config"""

import os
from hashlib import sha512
from os import makedirs
from pathlib import Path
from tempfile import gettempdir
from typing import TYPE_CHECKING

from prometheus_client.values import MultiProcessValue

from authentik import get_full_version
from authentik.lib.config import CONFIG
from authentik.lib.logging import get_logger_config
from authentik.lib.utils.http import get_http_session
from authentik.lib.utils.reflection import get_env
from authentik.root.install_id import get_install_id_raw
from lifecycle.migrate import run_migrations
from lifecycle.wait_for_db import wait_for_db
from lifecycle.worker import DjangoUvicornWorker

if TYPE_CHECKING:
    from gunicorn.app.wsgiapp import WSGIApplication
    from gunicorn.arbiter import Arbiter

    from authentik.root.asgi import AuthentikAsgi

wait_for_db()

_tmp = Path(gettempdir())
worker_class = "lifecycle.worker.DjangoUvicornWorker"
worker_tmp_dir = str(_tmp.joinpath("authentik_worker_tmp"))
prometheus_tmp_dir = str(_tmp.joinpath("authentik_prometheus_tmp"))

makedirs(worker_tmp_dir, exist_ok=True)
makedirs(prometheus_tmp_dir, exist_ok=True)

bind = f"unix://{str(_tmp.joinpath('authentik-core.sock'))}"

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "authentik.root.settings")
os.environ.setdefault("PROMETHEUS_MULTIPROC_DIR", prometheus_tmp_dir)

preload_app = True

max_requests = 1000
max_requests_jitter = 50

logconfig_dict = get_logger_config()

default_workers = 2

workers = CONFIG.get_int("web.workers", default_workers)
threads = CONFIG.get_int("web.threads", 4)


def post_fork(server: "Arbiter", worker: DjangoUvicornWorker):
    """Tell prometheus to use worker number instead of process ID for multiprocess"""
    from prometheus_client import values

    values.ValueClass = MultiProcessValue(lambda: worker._worker_id)


def worker_exit(server: "Arbiter", worker: DjangoUvicornWorker):
    """Remove pid dbs when worker is shutdown"""
    from prometheus_client import multiprocess

    multiprocess.mark_process_dead(worker._worker_id)


def on_starting(server: "Arbiter"):
    """Attach a set of IDs that can be temporarily reused.
    Used on reloads when each worker exists twice."""
    server._worker_id_overload = set()


def nworkers_changed(server: "Arbiter", new_value, old_value):
    """Gets called on startup too.
    Set the current number of workers.  Required if we raise the worker count
    temporarily using TTIN because server.cfg.workers won't be updated and if
    one of those workers dies, we wouldn't know the ids go that far."""
    server._worker_id_current_workers = new_value


def _next_worker_id(server: "Arbiter"):
    """If there are IDs open for reuse, take one.  Else look for a free one."""
    if server._worker_id_overload:
        return server._worker_id_overload.pop()

    in_use = set(w._worker_id for w in tuple(server.WORKERS.values()) if w.alive)
    free = set(range(1, server._worker_id_current_workers + 1)) - in_use

    return free.pop()


def on_reload(server: "Arbiter"):
    """Add a full set of ids into overload so it can be reused once."""
    server._worker_id_overload = set(range(1, server.cfg.workers + 1))


def pre_fork(server: "Arbiter", worker: DjangoUvicornWorker):
    """Attach the next free worker_id before forking off."""
    worker._worker_id = _next_worker_id(server)


def post_worker_init(worker: DjangoUvicornWorker):
    """Notify ASGI app that its started up"""
    # Only trigger startup DB logic on first worker
    # Startup code that imports code or is otherwise needed in every worker
    # does not use this signal, so we can skip this safely
    if worker._worker_id != 1:
        return
    app: WSGIApplication = worker.app
    root_app: AuthentikAsgi = app.callable
    root_app.call_startup()


if not CONFIG.get_bool("disable_startup_analytics", False):
    env = get_env()
    should_send = env not in ["dev", "ci"]
    if should_send:
        try:
            get_http_session().post(
                "https://goauthentik.io/api/event",
                json={
                    "domain": "authentik",
                    "name": "pageview",
                    "referrer": get_full_version(),
                    "url": (
                        f"http://localhost/{env}?utm_source={get_full_version()}&utm_medium={env}"
                    ),
                },
                headers={
                    "User-Agent": sha512(get_install_id_raw().encode("ascii")).hexdigest()[:16],
                    "Content-Type": "application/json",
                },
                timeout=5,
            )

        except Exception:  # nosec
            pass

if CONFIG.get_bool("remote_debug"):
    import debugpy

    debugpy.listen(("0.0.0.0", 6800))  # nosec

run_migrations()