import json
from collections import OrderedDict

from django import forms
from django.core.urlresolvers import resolve
from django.dispatch import receiver
from django.template.loader import get_template
from django.utils.translation import ugettext_lazy as _

from pretix.base.settings import settings_hierarkey
from pretix.base.shredder import BaseDataShredder
from pretix.base.signals import (
    logentry_display, register_data_shredders, register_global_settings,
    register_payment_providers, requiredaction_display,
)
from pretix.plugins.stripe.forms import StripeKeyValidator
from pretix.presale.signals import html_head


@receiver(register_payment_providers, dispatch_uid="payment_stripe")
def register_payment_provider(sender, **kwargs):
    from .payment import (
        StripeSettingsHolder, StripeCC, StripeGiropay, StripeIdeal, StripeAlipay, StripeBancontact,
        StripeSofort
    )

    return [StripeSettingsHolder, StripeCC, StripeGiropay, StripeIdeal, StripeAlipay, StripeBancontact, StripeSofort]


@receiver(html_head, dispatch_uid="payment_stripe_html_head")
def html_head_presale(sender, request=None, **kwargs):
    from .payment import StripeSettingsHolder

    provider = StripeSettingsHolder(sender)
    url = resolve(request.path_info)
    if provider.settings.get('_enabled', as_type=bool) and ("checkout" in url.url_name or "order.pay" in url.url_name):
        template = get_template('pretixplugins/stripe/presale_head.html')
        ctx = {'event': sender, 'settings': provider.settings}
        return template.render(ctx)
    else:
        return ""


@receiver(signal=logentry_display, dispatch_uid="stripe_logentry_display")
def pretixcontrol_logentry_display(sender, logentry, **kwargs):
    if logentry.action_type != 'pretix.plugins.stripe.event':
        return

    data = json.loads(logentry.data)
    event_type = data.get('type')
    text = None
    plains = {
        'charge.succeeded': _('Charge succeeded.'),
        'charge.refunded': _('Charge refunded.'),
        'charge.updated': _('Charge updated.'),
        'charge.pending': _('Charge pending'),
        'source.chargeable': _('Payment authorized.'),
        'source.canceled': _('Payment authorization canceled.'),
        'source.failed': _('Payment authorization failed.')
    }

    if event_type in plains:
        text = plains[event_type]
    elif event_type == 'charge.failed':
        text = _('Charge failed. Reason: {}').format(data['data']['object']['failure_message'])
    elif event_type == 'charge.dispute.created':
        text = _('Dispute created. Reason: {}').format(data['data']['object']['reason'])
    elif event_type == 'charge.dispute.updated':
        text = _('Dispute updated. Reason: {}').format(data['data']['object']['reason'])
    elif event_type == 'charge.dispute.closed':
        text = _('Dispute closed. Status: {}').format(data['data']['object']['status'])

    if text:
        return _('Stripe reported an event: {}').format(text)


@receiver(signal=requiredaction_display, dispatch_uid="stripe_requiredaction_display")
def pretixcontrol_action_display(sender, action, request, **kwargs):
    if not action.action_type.startswith('pretix.plugins.stripe'):
        return

    data = json.loads(action.data)

    if action.action_type == 'pretix.plugins.stripe.refund':
        template = get_template('pretixplugins/stripe/action_refund.html')
    elif action.action_type == 'pretix.plugins.stripe.overpaid':
        template = get_template('pretixplugins/stripe/action_overpaid.html')
    elif action.action_type == 'pretix.plugins.stripe.double':
        template = get_template('pretixplugins/stripe/action_double.html')

    ctx = {'data': data, 'event': sender, 'action': action}
    return template.render(ctx, request)


settings_hierarkey.add_default('payment_stripe_method_cc', True, bool)
settings_hierarkey.add_default('payment_stripe_cc_3ds_mode', 'recommended', str)


@receiver(register_global_settings, dispatch_uid='stripe_global_settings')
def register_global_settings(sender, **kwargs):
    return OrderedDict([
        ('payment_stripe_connect_client_id', forms.CharField(
            label=_('Stripe Connect: Client ID'),
            required=False,
            validators=(
                StripeKeyValidator('ca_'),
            ),
        )),
        ('payment_stripe_connect_secret_key', forms.CharField(
            label=_('Stripe Connect: Secret key'),
            required=False,
            validators=(
                StripeKeyValidator(['sk_live_', 'rk_live_']),
            ),
        )),
        ('payment_stripe_connect_publishable_key', forms.CharField(
            label=_('Stripe Connect: Publishable key'),
            required=False,
            validators=(
                StripeKeyValidator('pk_live_'),
            ),
        )),
        ('payment_stripe_connect_test_secret_key', forms.CharField(
            label=_('Stripe Connect: Secret key (test)'),
            required=False,
            validators=(
                StripeKeyValidator(['sk_test_', 'rk_test_']),
            ),
        )),
        ('payment_stripe_connect_test_publishable_key', forms.CharField(
            label=_('Stripe Connect: Publishable key (test)'),
            required=False,
            validators=(
                StripeKeyValidator('pk_test_'),
            ),
        )),
    ])


class PaymentLogsShredder(BaseDataShredder):
    verbose_name = _('Stripe payment history')
    identifier = 'stripe_logs'
    description = _('This will remove payment-related history information. No download will be offered.')

    def generate_files(self):
        pass

    def shred_data(self):
        for le in self.event.logentry_set.filter(action_type="pretix.plugins.stripe.event").exclude(data=""):
            d = le.parsed_data
            if 'data' in d:
                for k, v in list(d['data']['object'].items()):
                    if v not in ('reason', 'status', 'failure_message', 'object', 'id'):
                        d['data']['object'][k] = '█'
                le.data = json.dumps(d)
                le.shredded = True
                le.save(update_fields=['data', 'shredded'])


@receiver(register_data_shredders, dispatch_uid="stripe_shredders")
def register_shredder(sender, **kwargs):
    return [
        PaymentLogsShredder,
    ]