import re
import sys

try:
    import qutebrowser.api
    from qutebrowser.api import interceptor
    from qutebrowser.extensions.interceptors import Request
    from qutebrowser.qt.core import QUrl
    from qutebrowser.utils import debug, log
except ImportError:
    sys.stderr.write('qutebrowser not imported\n')
else:    
    # redirect on cloudflare
    def filter_cf(thereq: Request) -> None:
        """Block given request if necessary
        Called by a signal"""
        from qutebrowser.utils import objreg
        from qutebrowser.mainwindow import mainwindow
        url = thereq.request_url
        if url.query().startswith('ray='):
            log.network.debug(f"filter_cf thereq.first_party_url={thereq.first_party_url} {repr(thereq)}")
            
            if thereq.is_blocked is False and (
                    url.query().startswith('__cf_chl_rt_tk=') or \
                url.host() == 'challenges.cloudflare.com' or \
                url.path().startswith('/cdn-cgi/challenge-platform/h/')):
                # b/turnstile/if/ov2/av0/rcv0/0/33izj/
                # g/orchestrate/chl_page/v1
                url.setPath('/web' + '/*/' +thereq.first_party_url.host()
                            +thereq.first_party_url.path())
                url.setHost('web.archive.org')
                # "__cf_chl_rt_tk="[A-Za-z0-9.-]*"
                url.setQuery(None)
                log.network.info(f"config.filter_cf REDIRECTING to {url}")
                thereq.request_url = url
                thereq._redirected = True
                thereq.is_blocked = True
                if False:
                    # doesn't work at least on PyQt5 linux
                    thereq.redirect(url)
                elif True:
                    # 
                    thereq.block()
                    from qutebrowser.config import config
                    # expanded open_desktopservices_url
                    target = objreg.last_opened_window()
                    #? target = config.val.new_instance_open_target
                    window = mainwindow.get_window(via_ipc=False, target=target)
                    tab = window.tabbed_browser._current_tab()
                    window.tabbed_browser.tabopen(url,
                        background=False, related=True)
                    # NO window.maybe_raise()
                    # crimeflare tabs keep refreshing infinitely
                    window.tabbed_browser.close_tab(tab)
    interceptor.register(filter_cf)
    log.init.debug(f"loaded filter_cf interceptor")