#!/usr/bin/env python3
"""Capture one frame through the GNOME Screenshot portal and print its path."""
import sys
from gi.repository import Gio, GLib

target = sys.argv[1]
bus = Gio.bus_get_sync(Gio.BusType.SESSION, None)
proxy = Gio.DBusProxy.new_sync(bus, Gio.DBusProxyFlags.NONE, None, 'org.freedesktop.portal.Desktop', '/org/freedesktop/portal/desktop', 'org.freedesktop.portal.Screenshot', None)
request = proxy.call_sync('Screenshot', GLib.Variant('(a{sv})', ({'interactive': GLib.Variant('b', False)},)), Gio.DBusCallFlags.NONE, -1, None).unpack()[0]
loop = GLib.MainLoop()
result = {'uri': None, 'code': 1}
def response(_conn, _sender, _path, _interface, _member, params):
    code, values = params.unpack()
    if code == 0:
        result['uri'] = values.get('uri')
        result['code'] = 0
    loop.quit()
subscription = bus.signal_subscribe(None, 'org.freedesktop.portal.Request', 'Response', request, None, Gio.DBusSignalFlags.NONE, response)
loop.run()
bus.signal_unsubscribe(subscription)
if not result['uri']:
    raise SystemExit('Screenshot portal returned no image URI')
ok, contents, _etag = Gio.File.new_for_uri(result['uri']).load_contents(None)
if not ok:
    raise SystemExit('could not read screenshot portal URI')
Gio.File.new_for_path(target).replace_contents(contents, None, False, Gio.FileCreateFlags.REPLACE_DESTINATION, None)
print(target)