from django.conf import settings
from functools import wraps


class MonkeyPatchMiddleware(object):
    ''' Ensures that our monkey patching only gets called after it is safe to do so.'''

    def process_request(self, request):
        do_monkey_patch()


def do_monkey_patch():
    patch_speaker_profile_form()
    fix_sitetree_check_access_500s()
    never_cache_login_page()
    patch_stripe_payment_form()

    # Remove this function from existence
    global do_monkey_patch
    do_monkey_patch = lambda: None  # noqa: E731


def patch_speaker_profile_form():
    ''' Replaces textarea widgets with markdown editors. '''

    import widgets
    from symposion.speakers.forms import SpeakerForm

    fields = SpeakerForm.base_fields
    fields["biography"].widget = widgets.AceMarkdownEditor()
    fields["experience"].widget = widgets.AceMarkdownEditor()
    fields["accessibility"].widget = widgets.AceMarkdownEditor()


def fix_sitetree_check_access_500s():
    ''' django-sitetree has a bug: https://github.com/idlesign/django-sitetree/pull/167/files
    -- it swallows the cause of all 500 errors. This swallows KeyErrors from
    the failing function. '''

    from sitetree.sitetreeapp import SiteTree

    old_check_access = SiteTree.check_access

    @wraps(SiteTree.check_access)
    def check_access(self, *a, **k):
        try:
            return old_check_access(self, *a, **k)
        except KeyError:
            return False

    SiteTree.check_access = check_access


def never_cache_login_page():
    from django.views.decorators.cache import never_cache
    from account.views import LoginView
    LoginView.get = never_cache(LoginView.get)


def patch_stripe_payment_form():  # noqa: C901

    import inspect  # Oh no.
    from django.http.request import HttpRequest
    from registripe.forms import CreditCardForm
    from pinaxcon.registrasion import models

    old_init = CreditCardForm.__init__

    @wraps(old_init)
    def new_init(self, *a, **k):

        # Map the names from our attendee profile model
        # To the values expected in the Stripe card model
        mappings = (
            ("address_line_1", "address_line1"),
            ("address_line_2", "address_line2"),
            ("address_suburb", "address_city"),
            ("address_postcode", "address_zip"),
            ("state", "address_state"),
            ("country", "address_country"),
        )

        initial = "initial"
        if initial not in k:
            k[initial] = {}
        initial = k[initial]

        # Find request context maybe?
        frame = inspect.currentframe()
        attendee_profile = None
        if frame:
            context = frame.f_back.f_locals
            for name, value in (context.items() or {}):
                if not isinstance(value, HttpRequest):
                    continue
                user = value.user
                if not user.is_authenticated():
                    break
                try:
                    attendee_profile = models.AttendeeProfile.objects.get(
                        attendee__user=user
                    )
                except models.AttendeeProfile.DoesNotExist:
                    # Profile is still none.
                    pass
                break

        if attendee_profile:
            for us, stripe in mappings:
                i = getattr(attendee_profile, us, None)
                if i:
                    initial[stripe] = i

        old_init(self, *a, **k)

    CreditCardForm.__init__ = new_init