# Copyright (C) 2017-2022  The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU Affero General Public License version 3, or any later version
# See top-level LICENSE file for more information

from importlib.util import find_spec
from typing import List, Union

from django_js_reverse.views import urls_js

from django.conf import settings
from django.conf.urls import handler400, handler403, handler404, handler500, include
from django.contrib.staticfiles.views import serve
from django.shortcuts import render
from django.urls import URLPattern, URLResolver
from django.urls import re_path as url
from django.views.generic.base import RedirectView

from swh.web.browse.identifiers import swhid_browse
from swh.web.config import get_config
from swh.web.utils import origin_visit_types
from swh.web.utils.exc import swh_handle400, swh_handle403, swh_handle404, swh_handle500

swh_web_config = get_config()

favicon_view = RedirectView.as_view(
    url="/static/img/icons/swh-logo-32x32.png", permanent=True
)


def _default_view(request):
    return render(request, "homepage.html", {"visit_types": origin_visit_types()})


urlpatterns: List[Union[URLPattern, URLResolver]] = []

# Register URLs for each SWH Django application
for app in settings.SWH_DJANGO_APPS:
    app_urls = app + ".urls"
    try:
        app_urls_spec = find_spec(app_urls)
        if app_urls_spec is not None:
            urlpatterns.append(url(r"^", include(app_urls)))
    except ModuleNotFoundError:
        assert False, f"Django application {app} not found !"

urlpatterns += [
    url(r"^favicon\.ico/$", favicon_view),
    url(r"^$", _default_view, name="swh-web-homepage"),
    url(r"^jsreverse/$", urls_js, name="js_reverse"),
    # keep legacy SWHID resolving URL with trailing slash for backward compatibility
    url(
        r"^(?P<swhid>(swh|SWH):[0-9]+:[A-Za-z]+:[0-9A-Fa-f]+.*)/$",
        swhid_browse,
        name="browse-swhid-legacy",
    ),
    url(
        r"^(?P<swhid>(swh|SWH):[0-9]+:[A-Za-z]+:[0-9A-Fa-f]+.*)$",
        swhid_browse,
        name="browse-swhid",
    ),
    url(r"^", include("swh.web.misc.urls")),
]


# allow to serve assets through django staticfiles
# even if settings.DEBUG is False
def insecure_serve(request, path, **kwargs):
    return serve(request, path, insecure=True, **kwargs)


# enable to serve compressed assets through django development server
if swh_web_config["serve_assets"]:
    static_pattern = r"^%s(?P<path>.*)/$" % settings.STATIC_URL[1:]
    urlpatterns.append(url(static_pattern, insecure_serve))


handler400 = swh_handle400  # noqa
handler403 = swh_handle403  # noqa
handler404 = swh_handle404  # noqa
handler500 = swh_handle500  # noqa