# This file is part of the Indico plugins.
# Copyright (C) 2002 - 2022 CERN
#
# The Indico plugins are free software; you can redistribute
# them and/or modify them under the terms of the MIT License;
# see the LICENSE file for more details.

from flask_pluginengine import render_plugin_template
from wtforms.fields import StringField, URLField
from wtforms.validators import DataRequired, Optional

from indico.core.plugins import IndicoPlugin, url_for_plugin
from indico.modules.events.payment import (PaymentEventSettingsFormBase, PaymentPluginMixin,
                                           PaymentPluginSettingsFormBase)
from indico.util.string import remove_accents, str_to_ascii
from indico.web.forms.validators import UsedIf

from indico_payment_paypal import _
from indico_payment_paypal.blueprint import blueprint
from indico_payment_paypal.util import validate_business


class PluginSettingsForm(PaymentPluginSettingsFormBase):
    url = URLField(_('API URL'), [DataRequired()], description=_('URL of the PayPal HTTP API.'))
    business = StringField(_('Business'), [Optional(), validate_business],
                           description=_('The default PayPal ID or email address associated with a PayPal account. '
                                         'Event managers will be able to override this.'))


class EventSettingsForm(PaymentEventSettingsFormBase):
    business = StringField(_('Business'), [UsedIf(lambda form, _: form.enabled.data), DataRequired(),
                                           validate_business],
                           description=_('The PayPal ID or email address associated with a PayPal account.'))


class PaypalPaymentPlugin(PaymentPluginMixin, IndicoPlugin):
    """PayPal

    Provides a payment method using the PayPal IPN API.
    """
    configurable = True
    settings_form = PluginSettingsForm
    event_settings_form = EventSettingsForm
    default_settings = {'method_name': 'PayPal',
                        'url': 'https://www.paypal.com/cgi-bin/webscr',
                        'business': ''}
    default_event_settings = {'enabled': False,
                              'method_name': None,
                              'business': None}

    def init(self):
        super().init()
        self.template_hook('event-manage-payment-plugin-before-form', self._get_encoding_warning)

    @property
    def logo_url(self):
        return url_for_plugin(self.name + '.static', filename='images/logo.png')

    def get_blueprints(self):
        return blueprint

    def adjust_payment_form_data(self, data):
        event = data['event']
        registration = data['registration']
        data['item_name'] = '{}: registration for {}'.format(
            str_to_ascii(remove_accents(registration.full_name)),
            str_to_ascii(remove_accents(event.title))
        )
        data['return_url'] = url_for_plugin('payment_paypal.success', registration.locator.uuid, _external=True)
        data['cancel_url'] = url_for_plugin('payment_paypal.cancel', registration.locator.uuid, _external=True)
        data['notify_url'] = url_for_plugin('payment_paypal.notify', registration.locator.uuid, _external=True)

    def _get_encoding_warning(self, plugin=None, event=None):
        if plugin == self:
            return render_plugin_template('event_settings_encoding_warning.html')