"""Web app manifest and service worker (installable app, Android share target)."""

from django.contrib.auth.decorators import login_not_required
from django.http import HttpResponse, JsonResponse
from django.templatetags.static import static
from django.urls import reverse
from django.views.decorators.cache import cache_control
from django.views.decorators.http import require_GET

# No caching of pages or API responses: private recipes must never sit in a shared cache,
# and the app is online-only. The worker exists so browsers offer installation.
SERVICE_WORKER = """self.addEventListener("install", () => self.skipWaiting());
self.addEventListener("activate", (event) => event.waitUntil(self.clients.claim()));
"""


@login_not_required
@require_GET
@cache_control(max_age=3600)
def manifest(request):
    data = {
        "name": "Kochbuch",
        "short_name": "Kochbuch",
        "lang": "de",
        "start_url": reverse("recipes:list"),
        "scope": "/",
        "display": "standalone",
        "background_color": "#faf7f2",
        "theme_color": "#b4532a",
        "icons": [
            {"src": static("icons/icon-192.png"), "sizes": "192x192", "type": "image/png"},
            {"src": static("icons/icon-512.png"), "sizes": "512x512", "type": "image/png"},
            {"src": static("icons/icon-maskable-512.png"), "sizes": "512x512", "type": "image/png", "purpose": "maskable"},
        ],
        "share_target": {
            "action": reverse("recipes:share"),
            "method": "GET",
            "params": {"title": "title", "text": "text", "url": "url"},
        },
    }
    return JsonResponse(data, content_type="application/manifest+json", json_dumps_params={"ensure_ascii": False})


@login_not_required
@require_GET
@cache_control(max_age=0, no_cache=True)
def service_worker(request):
    return HttpResponse(SERVICE_WORKER, content_type="application/javascript")