# -*- coding: utf-8 -*-
# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
#
from django import forms
from django.utils import formats
from django.utils.translation import ugettext_lazy as _, ugettext, get_language
from .models import Funding
from .widgets import PerksAmountWidget
from . import app_settings


class FundingForm(forms.Form):
    required_css_class = 'required'

    amount = forms.DecimalField(label=_("Amount"), decimal_places=2, widget=PerksAmountWidget())
    name = forms.CharField(
        label=_("Name"), required=False, help_text=_("Optional name for public list of contributors"))
    email = forms.EmailField(
        label=_("Contact e-mail"),
        help_text=_(
            "We'll use it to contact you about the <strong>details needed for your perks</strong>,<br/>"
            "and to send you updates about your payment and the fundraiser status (which you can always turn off).<br/>"
            "Your e-mail won't be publicised."), required=False)

    def __init__(self, offer, *args, **kwargs):
        self.offer = offer
        super(FundingForm, self).__init__(*args, **kwargs)
        self.fields['amount'].widget.form_instance = self

    def clean_amount(self):
        if self.cleaned_data['amount'] < app_settings.MIN_AMOUNT:
            min_amount = app_settings.MIN_AMOUNT
            if isinstance(min_amount, float):
                min_amount = formats.number_format(min_amount, 2)
            raise forms.ValidationError(
                ugettext("The minimum amount is %(amount)s PLN.") % {
                    'amount': min_amount})
        return self.cleaned_data['amount']

    def clean(self):
        if not self.offer.is_current():
            raise forms.ValidationError(ugettext("This offer is out of date."))
        return self.cleaned_data

    def save(self):
        funding = Funding.objects.create(
            offer=self.offer,
            name=self.cleaned_data['name'],
            email=self.cleaned_data['email'],
            amount=self.cleaned_data['amount'],
            language_code=get_language(),
        )
        funding.perks = funding.offer.get_perks(funding.amount)
        return funding