forms.py

import collections
import datetime
import re
from decimal import Decimal

import betterforms.multiform
import django.core.exceptions
import django.db.utils
import post_office
import post_office.models
from django import forms
from django.contrib.auth import get_user_model
from django.contrib.auth.models import User
from django.contrib.auth.tokens import default_token_generator
from django.core import validators
from django.forms import formset_factory, modelformset_factory
from django.utils import timezone
from django.utils.html import format_html
from django.utils.safestring import mark_safe
from django.utils.translation import ugettext as _

import tracker.auth as auth
import tracker.prizemail as prizemail
import tracker.util
import tracker.viewutil as viewutil
import tracker.widgets
from tracker import models
from tracker.validators import positive, nonzero

__all__ = [
    'UsernameForm',
    'DonationCredentialsForm',
    'DonationEntryForm',
    'DonationBidForm',
    'DonationBidFormSet',
    'DonationSearchForm',
    'BidSearchForm',
    'DonorSearchForm',
    'RunSearchForm',
    'BidSearchForm',
    'PrizeSearchForm',
    'MergeObjectsForm',
    'EventFilterForm',
    'PrizeSubmissionForm',
    'AutomailPrizeContributorsForm',
    'DrawPrizeWinnersForm',
    'AutomailPrizeWinnersForm',
    'RegistrationConfirmationForm',
    'PrizeAcceptanceForm',
    'PrizeAcceptanceWithAddressForm',
    'PrizeShippingFormSet',
]


class UsernameForm(forms.Form):
    username = forms.CharField(
        max_length=255, widget=forms.TextInput(attrs={'class': 'required username'})
    )

    def clean_username(self):
        if 'username' in self.cleaned_data:
            username = self.cleaned_data['username']
            if not re.match(r'^[a-zA-Z0-9_]+$', username):
                raise forms.ValidationError(
                    _('Usernames can only contain letters, numbers, and the underscore')
                )
            if username[:10] == 'openiduser':
                raise forms.ValidationError(
                    _("Username may not start with 'openiduser'")
                )
            if User.objects.filter(username=username).count() > 0:
                raise forms.ValidationError(_('Username already in use'))
            return self.cleaned_data['username']


class DonationCredentialsForm(forms.Form):
    paypalemail = forms.EmailField(min_length=1, label='Paypal Email')
    amount = forms.DecimalField(
        decimal_places=2, min_value=Decimal('0.00'), label='Donation Amount'
    )
    transactionid = forms.CharField(min_length=1, label='Transaction ID')


class DonationEntryForm(forms.Form):
    def __init__(self, event=None, *args, **kwargs):
        super(DonationEntryForm, self).__init__(*args, **kwargs)
        minDonationAmount = (
            event.minimumdonation if event is not None else Decimal('1.00')
        )
        self.fields['amount'] = forms.DecimalField(
            decimal_places=2,
            min_value=minDonationAmount,
            max_value=Decimal('100000'),
            label='Donation Amount (min ${0})'.format(minDonationAmount),
            widget=tracker.widgets.NumberInput(
                attrs={
                    'id': 'iDonationAmount',
                    'min': str(minDonationAmount),
                    'step': '0.01',
                }
            ),
            required=True,
        )
        self.fields['comment'] = forms.CharField(widget=forms.Textarea, required=False)
        self.fields['requestedvisibility'] = forms.ChoiceField(
            initial='CURR',
            choices=models.Donation._meta.get_field('requestedvisibility').choices,
            label='Name Visibility',
        )
        self.fields['requestedalias'] = forms.CharField(
            max_length=32, label='Preferred Alias', required=False
        )
        self.fields['requestedemail'] = forms.EmailField(
            max_length=128, label='Preferred Email', required=False
        )
        self.fields['requestedsolicitemail'] = forms.ChoiceField(
            initial='CURR',
            choices=models.Donation._meta.get_field('requestedsolicitemail').choices,
            label='Charity Email Opt In',
        )

    def clean(self):
        if (
            self.cleaned_data['requestedvisibility'] == 'ALIAS'
            and not self.cleaned_data['requestedalias']
        ):
            raise forms.ValidationError(
                _("Must specify an alias with 'ALIAS' visibility")
            )
        if (
            self.cleaned_data['requestedalias']
            and self.cleaned_data['requestedalias'].lower() == 'anonymous'
        ):
            self.cleaned_data['requestedalias'] = ''
            self.cleaned_data['requestedvisibility'] = 'ANON'
        return self.cleaned_data


class DonationBidForm(forms.Form):
    bid = forms.fields.IntegerField(
        label='',
        required=True,
        widget=tracker.widgets.MegaFilterWidget(model='bidtarget'),
    )
    customoptionname = forms.fields.CharField(
        max_length=models.Bid._meta.get_field('name').max_length,
        label='New Option Name:',
        required=False,
    )
    amount = forms.DecimalField(
        decimal_places=2,
        max_digits=20,
        required=True,
        validators=[positive, nonzero],
        widget=tracker.widgets.NumberInput(
            attrs={'class': 'cdonationbidamount', 'step': '0.01'}
        ),
    )

    def clean_bid(self):
        try:
            bid = models.Bid.objects.get(id=self.cleaned_data['bid'])
            if bid.state != 'OPENED':
                raise forms.ValidationError(_('Bid is no longer open.'))
            return bid
        except models.Bid.DoesNotExist:
            raise forms.ValidationError(_('Bid does not exist.'))

    def clean_customoptionname(self):
        return self.cleaned_data.get('customoptionname', '').strip()

    def clean(self):
        bid = self.cleaned_data.get('bid', None)
        if bid and bid.allowuseroptions:
            customoptionname = self.cleaned_data['customoptionname']
            if not customoptionname:
                raise forms.ValidationError(
                    {'customoptionname': _('Suggestions cannot be blank.')}
                )
            elif (
                bid.option_max_length and len(customoptionname) > bid.option_max_length
            ):
                raise forms.ValidationError(
                    {
                        'customoptionname': _(
                            f'Suggestion was too long, it must be {bid.option_max_length} characters or less.'
                        ),
                    }
                )
            elif self.cleaned_data['amount'] < Decimal('1.00'):
                raise forms.ValidationError(
                    {
                        'amount': _(
                            'New suggestions must have at least a dollar allocated.'
                        )
                    }
                )
        return self.cleaned_data


class DonationBidFormSetBase(forms.BaseFormSet):
    max_bids = 10

    def __init__(self, amount=Decimal('0.00'), *args, **kwargs):
        self.amount = amount
        super(DonationBidFormSetBase, self).__init__(*args, **kwargs)

    def clean(self):
        if any(self.errors):
            # Don't bother validating the formset unless each form is valid on
            # its own
            return
        if len(self.forms) > DonationBidFormSetBase.max_bids:
            self.forms[0].errors['__all__'] = self.error_class(
                [
                    'Error, cannot submit more than '
                    + str(DonationBidFormSetBase.max_bids)
                    + ' bids.'
                ]
            )
            raise forms.ValidationError(
                'Error, cannot submit more than '
                + str(DonationBidFormSetBase.max_bids)
                + ' bids.'
            )
        sumAmount = Decimal('0.00')
        bids = set()
        for form in self.forms:
            if 'bid' in form.cleaned_data:
                if form.cleaned_data.get('amount', None):
                    sumAmount += form.cleaned_data['amount']
                if sumAmount > self.amount:
                    form.errors['__all__'] = form.error_class(
                        ['Error, total bid amount cannot exceed donation amount.']
                    )
                    raise forms.ValidationError(
                        'Error, total bid amount cannot exceed donation amount.'
                    )
                if form.cleaned_data['bid'] in bids:
                    form.errors['__all__'] = form.error_class(
                        [
                            'Error, cannot bid more than once for the same bid in the same donation.'
                        ]
                    )
                    raise forms.ValidationError(
                        'Error, cannot bid more than once for the same bid in the same donation.'
                    )
                bids.add(form.cleaned_data['bid'])


DonationBidFormSet = formset_factory(
    DonationBidForm,
    formset=DonationBidFormSetBase,
    max_num=DonationBidFormSetBase.max_bids,
)


class DonorSearchForm(forms.Form):
    q = forms.CharField(required=False, initial=None, max_length=255, label='Search')


class DonationSearchForm(forms.Form):
    feed = forms.ChoiceField(
        required=False,
        initial='recent',
        choices=(('all', 'All'), ('recent', 'Recent')),
        label='Filter',
    )
    q = forms.CharField(required=False, initial=None, max_length=255, label='Search')


class BidSearchForm(forms.Form):
    feed = forms.ChoiceField(
        required=False,
        initial='current',
        choices=(
            ('all', 'All'),
            ('current', 'Current'),
            ('future', 'Future'),
            ('open', 'Open'),
            ('closed', 'Closed'),
        ),
        label='Type',
    )
    q = forms.CharField(required=False, initial=None, max_length=255, label='Search')


class RunSearchForm(forms.Form):
    feed = forms.ChoiceField(
        required=False,
        initial='current',
        choices=(('all', 'All'), ('current', 'Current'), ('future', 'Future')),
        label='Type',
    )
    q = forms.CharField(required=False, initial=None, max_length=255, label='Search')


class PrizeSearchForm(forms.Form):
    feed = forms.ChoiceField(
        required=False,
        initial='upcomming',
        choices=(
            ('all', 'All'),
            ('unwon', 'Not Drawn'),
            ('won', 'Drawn'),
            ('current', 'Current'),
            ('future', 'Future'),
        ),
        label='Type',
    )
    q = forms.CharField(required=False, initial=None, max_length=255, label='Search')


class MergeObjectsForm(forms.Form):
    def __init__(self, model, objects, *args, **kwargs):
        super(MergeObjectsForm, self).__init__(*args, **kwargs)
        self.model = model
        self.choices = []
        for objId in objects:
            choice_name = '#%d: ' % objId + str(self.model.objects.get(id=objId))
            self.choices.append((objId, choice_name))
        self.fields['root'] = forms.ChoiceField(choices=self.choices, required=True)
        self.fields['objects'] = forms.CharField(
            initial=','.join([str(i) for i in objects]), widget=forms.HiddenInput()
        )

    def clean(self):
        root = self.model.objects.get(id=self.cleaned_data['root'])
        objects = []
        for objId in [
            int(x)
            for x in [x for x in self.cleaned_data['objects'].split(',') if bool(x)]
        ]:
            if objId != root.id:
                objects.append(self.model.objects.get(id=objId))
        self.cleaned_data['root'] = root
        self.cleaned_data['objects'] = objects
        return self.cleaned_data


class EventFilterForm(forms.Form):
    def __init__(self, event=None, allow_empty=True, *args, **kwargs):
        super(EventFilterForm, self).__init__(*args, **kwargs)
        self.fields['event'] = forms.ModelChoiceField(
            queryset=models.Event.objects.all(),
            empty_label='All Events',
            initial=event,
            required=not allow_empty,
        )


class PrizeSubmissionForm(forms.Form):
    name = forms.CharField(
        max_length=64,
        required=True,
        label='Prize Name',
        help_text='Please use a name that will uniquely identify your prize throughout the event.',
    )
    description = forms.CharField(
        max_length=1024,
        required=True,
        label='Prize Description',
        widget=forms.Textarea,
        help_text='Briefly describe your prize, as you would like it to appear to the public. All descriptions are subject to editing at our discretion.',
    )
    maxwinners = forms.IntegerField(
        required=True,
        initial=1,
        widget=tracker.widgets.NumberInput({'min': 1, 'max': 10}),
        label='Number of Copies',
        help_text='If you are submitting multiple copies of the same prize (e.g. multiple copies of the same print), specify how many. Otherwise, leave this at 1.',
    )
    extrainfo = forms.CharField(
        max_length=1024,
        required=False,
        label='Extra/Non-Public Information',
        widget=forms.Textarea,
        help_text='Enter any additional information you feel the staff should know about your prize. This information will not be made public. ',
    )
    estimatedvalue = forms.DecimalField(
        decimal_places=2,
        max_digits=20,
        required=True,
        label='Estimated Value',
        validators=[positive, nonzero],
        help_text='Estimate the actual value of the prize. If the prize is handmade, use your best judgement based on time spent creating it. Note that this is not the bid amount.',
    )
    imageurl = forms.URLField(
        max_length=1024,
        label='Prize Image',
        required=True,
        help_text=mark_safe(
            'Enter the URL of an image of the prize. Please see our notes regarding prize images at the bottom of the form. Images are now required for prize submissions.'
        ),
    )
    creatorname = forms.CharField(
        max_length=64,
        required=False,
        label='Prize Creator',
        help_text='Name of the creator of the prize. This is for crediting/promoting the people who created this prize (please fill this in even if you are the creator).',
    )
    creatoremail = forms.EmailField(
        max_length=128,
        label='Prize Creator Email',
        required=False,
        help_text='Enter an e-mail if the creator of this prize accepts comissions and would like to be promoted through our marathon. Do not enter an e-mail unless they are known to accept comissions, or you have received their explicit consent.',
    )
    creatorwebsite = forms.URLField(
        max_length=1024,
        label='Prize Creator Website',
        required=False,
        help_text="Enter the URL of the prize creator's website or online storefront if applicable.",
    )
    agreement = forms.BooleanField(
        label='Agreement',
        help_text=mark_safe(
            """Check if you agree to the following:
  <ul>
    <li>I am expected to ship the prize myself, and will keep a receipt to be reimbursed for the cost of shipping.</li>
    <li>I currently have the prize in my possession, or can guarantee that I can obtain it within one week of the start of the marathon.</li>
    <li>I agree to communicate with the staff in a timely manner as neccessary regarding this prize.</li>
    <li>I agree that all contact information is correct has been provided with the consent of the respective parties.</li>
    <li>I agree that if the prize is no longer available, I will contact the staff immediately to withdraw it, and no later than one month of the start date of the marathon.</li>
  </ul>"""
        ),
    )

    def impl_clean_run(self, data):
        if not data:
            return None
        try:
            return models.SpeedRun.objects.get(id=data)
        except Exception:
            raise forms.ValidationError('Invalid Run id.')

    def clean_name(self):
        basename = self.cleaned_data['name']
        prizes = models.Prize.objects.filter(name=basename)
        if not prizes.exists():
            return basename
        name = basename
        count = 1
        while prizes.exists():
            count += 1
            name = basename + ' ' + str(count)
            prizes = models.Prize.objects.filter(name=name)
        raise forms.ValidationError('Prize name taken. Suggestion: "{0}"'.format(name))

    def clean_agreement(self):
        value = self.cleaned_data['agreement']
        if not value:
            raise forms.ValidationError(
                'You must agree with this statement to submit a prize.'
            )
        return value

    def clean(self):
        return self.cleaned_data

    def save(self, event, handler=None):
        provider = ''
        if handler and handler.username != handler.email:
            provider = handler.username
        prize = models.Prize.objects.create(
            event=event,
            name=self.cleaned_data['name'],
            description=self.cleaned_data['description'],
            maxwinners=self.cleaned_data['maxwinners'],
            extrainfo=self.cleaned_data['extrainfo'],
            estimatedvalue=self.cleaned_data['estimatedvalue'],
            minimumbid=5,
            maximumbid=5,
            image=self.cleaned_data['imageurl'],
            handler=handler,
            provider=provider,
            creator=self.cleaned_data['creatorname'],
            creatoremail=self.cleaned_data['creatoremail'],
            creatorwebsite=self.cleaned_data['creatorwebsite'],
        )
        prize.save()
        return prize


class AutomailPrizeContributorsForm(forms.Form):
    def __init__(self, prizes, *args, **kwargs):
        super(AutomailPrizeContributorsForm, self).__init__(*args, **kwargs)
        self.choices = []
        prizes = [prize for prize in prizes if prize.handler]
        event = prizes[0].event if len(prizes) > 0 else None
        for prize in prizes:
            self.choices.append(
                (
                    prize.id,
                    mark_safe(
                        format_html(
                            '<a href="{0}">{1}</a> State: {2} (<a href="mailto:{3}">{3}</a>)',
                            viewutil.admin_url(prize),
                            prize,
                            prize.get_state_display(),
                            prize.handler.email,
                        )
                    ),
                )
            )
        self.fields['fromaddress'] = forms.EmailField(
            max_length=256,
            initial=prizemail.get_event_default_sender_email(event),
            required=True,
            label='From Address',
            help_text='Specify the e-mail you would like to identify as the sender',
        )
        self.fields['replyaddress'] = forms.EmailField(
            max_length=256,
            required=False,
            label='Reply Address',
            help_text='If left blank this will be the same as the from address',
        )
        self.fields['emailtemplate'] = forms.ModelChoiceField(
            queryset=post_office.models.EmailTemplate.objects.all(),
            empty_label='Pick a template...',
            required=True,
            label='Email Template',
            help_text='Select an email template to use.',
        )
        self.fields['prizes'] = forms.TypedMultipleChoiceField(
            choices=self.choices,
            initial=[prize.id for prize in prizes],
            label='Prizes',
            empty_value='',
            widget=forms.widgets.CheckboxSelectMultiple,
        )

    def clean(self):
        if not self.cleaned_data['replyaddress']:
            self.cleaned_data['replyaddress'] = self.cleaned_data['fromaddress']
        self.cleaned_data['prizes'] = list(
            [models.Prize.objects.get(id=x) for x in self.cleaned_data['prizes']]
        )
        return self.cleaned_data


class DrawPrizeWinnersForm(forms.Form):
    def __init__(self, prizes, *args, **kwargs):
        super(DrawPrizeWinnersForm, self).__init__(*args, **kwargs)
        self.choices = []
        for prize in prizes:
            self.choices.append(
                (
                    prize.id,
                    mark_safe(
                        format_html(
                            '<a href="{0}">{1}</a>', viewutil.admin_url(prize), prize
                        )
                    ),
                )
            )
        self.fields['prizes'] = forms.TypedMultipleChoiceField(
            choices=self.choices,
            initial=[prize.id for prize in prizes],
            coerce=lambda x: int(x),
            label='Prizes',
            empty_value='',
            widget=forms.widgets.CheckboxSelectMultiple,
        )
        self.fields['seed'] = forms.IntegerField(
            required=False,
            label='Random Seed',
            help_text="Completely optional, if you don't know what this is, don't worry about it",
        )

    def clean(self):
        self.cleaned_data['prizes'] = list(
            [models.Prize.objects.get(id=x) for x in self.cleaned_data['prizes']]
        )
        return self.cleaned_data


class AutomailPrizeWinnersForm(forms.Form):
    def __init__(self, prizewinners, *args, **kwargs):
        super(AutomailPrizeWinnersForm, self).__init__(*args, **kwargs)
        event = prizewinners[0].prize.event if len(prizewinners) > 0 else None
        self.fields['fromaddress'] = forms.EmailField(
            max_length=256,
            initial=prizemail.get_event_default_sender_email(event),
            required=True,
            label='From Address',
            help_text='Specify the e-mail you would like to identify as the sender',
        )
        self.fields['replyaddress'] = forms.EmailField(
            max_length=256,
            required=False,
            label='Reply Address',
            help_text='If left blank this will be the same as the from address',
        )
        self.fields['emailtemplate'] = forms.ModelChoiceField(
            queryset=post_office.models.EmailTemplate.objects.all(),
            initial=event.prizewinneremailtemplate if event else None,
            empty_label='Pick a template...',
            required=True,
            label='Email Template',
            help_text='Select an email template to use. Can be overridden by the prize itself.',
        )
        self.fields['acceptdeadline'] = forms.DateTimeField(
            initial=timezone.now() + datetime.timedelta(weeks=2)
        )

        self.choices = []
        for prizewinner in prizewinners:
            winner = prizewinner.winner
            prize = prizewinner.prize
            self.choices.append(
                (
                    prizewinner.id,
                    mark_safe(
                        format_html(
                            '<a href="{0}">{1}</a>: <a href="{2}">{3}</a>',
                            viewutil.admin_url(prize),
                            prize,
                            viewutil.admin_url(winner),
                            winner,
                        )
                    ),
                )
            )
        self.fields['prizewinners'] = forms.TypedMultipleChoiceField(
            choices=self.choices,
            initial=[prizewinner.id for prizewinner in prizewinners],
            coerce=lambda x: int(x),
            label='Prize Winners',
            empty_value='',
            widget=forms.widgets.CheckboxSelectMultiple,
        )

    def clean(self):
        if not self.cleaned_data['replyaddress']:
            self.cleaned_data['replyaddress'] = self.cleaned_data['fromaddress']
        self.cleaned_data['prizewinners'] = [
            models.PrizeWinner.objects.get(id=pw)
            for pw in self.cleaned_data['prizewinners']
        ]
        return self.cleaned_data


class AutomailPrizeAcceptNotifyForm(forms.Form):
    def __init__(self, prizewinners, *args, **kwargs):
        super(AutomailPrizeAcceptNotifyForm, self).__init__(*args, **kwargs)
        event = prizewinners[0].prize.event if len(prizewinners) > 0 else None
        self.fields['fromaddress'] = forms.EmailField(
            max_length=256,
            initial=prizemail.get_event_default_sender_email(event),
            required=True,
            label='From Address',
            help_text='Specify the e-mail you would like to identify as the sender',
        )
        self.fields['replyaddress'] = forms.EmailField(
            max_length=256,
            required=False,
            label='Reply Address',
            help_text='If left blank this will be the same as the from address',
        )
        self.fields['emailtemplate'] = forms.ModelChoiceField(
            queryset=post_office.models.EmailTemplate.objects.all(),
            initial=None,
            empty_label='Pick a template...',
            required=True,
            label='Email Template',
            help_text='Select an email template to use.',
        )

        self.choices = []
        for prizewinner in prizewinners:
            winner = prizewinner.winner
            prize = prizewinner.prize
            self.choices.append(
                (
                    prizewinner.id,
                    mark_safe(
                        format_html(
                            '<a href="{0}">{1}</a>: <a href="{2}">{3}</a>',
                            viewutil.admin_url(prize),
                            prize,
                            viewutil.admin_url(winner),
                            winner,
                        )
                    ),
                )
            )
        self.fields['prizewinners'] = forms.TypedMultipleChoiceField(
            choices=self.choices,
            initial=[prizewinner.id for prizewinner in prizewinners],
            coerce=lambda x: int(x),
            label='Prize Winners',
            empty_value='',
            widget=forms.widgets.CheckboxSelectMultiple,
        )

    def clean(self):
        if not self.cleaned_data['replyaddress']:
            self.cleaned_data['replyaddress'] = self.cleaned_data['fromaddress']
        self.cleaned_data['prizewinners'] = list(
            [
                models.PrizeWinner.objects.get(id=x)
                for x in self.cleaned_data['prizewinners']
            ]
        )
        return self.cleaned_data


class AutomailPrizeShippingNotifyForm(forms.Form):
    def __init__(self, prizewinners, *args, **kwargs):
        super(AutomailPrizeShippingNotifyForm, self).__init__(*args, **kwargs)
        event = prizewinners[0].prize.event if len(prizewinners) > 0 else None
        self.fields['fromaddress'] = forms.EmailField(
            max_length=256,
            initial=prizemail.get_event_default_sender_email(event),
            required=True,
            label='From Address',
            help_text='Specify the e-mail you would like to identify as the sender',
        )
        self.fields['replyaddress'] = forms.EmailField(
            max_length=256,
            required=False,
            label='Reply Address',
            help_text='If left blank this will be the same as the from address',
        )
        self.fields['emailtemplate'] = forms.ModelChoiceField(
            queryset=post_office.models.EmailTemplate.objects.all(),
            initial=None,
            empty_label='Pick a template...',
            required=True,
            label='Email Template',
            help_text='Select an email template to use.',
        )

        self.choices = []
        for prizewinner in prizewinners:
            winner = prizewinner.winner
            prize = prizewinner.prize
            self.choices.append(
                (
                    prizewinner.id,
                    mark_safe(
                        format_html(
                            '<a href="{0}">{1}</a>: <a href="{2}">{3}</a>',
                            viewutil.admin_url(prize),
                            prize,
                            viewutil.admin_url(winner),
                            winner,
                        )
                    ),
                )
            )
        self.fields['prizewinners'] = forms.TypedMultipleChoiceField(
            choices=self.choices,
            initial=[prizewinner.id for prizewinner in prizewinners],
            coerce=lambda x: int(x),
            label='Prize Winners',
            empty_value='',
            widget=forms.widgets.CheckboxSelectMultiple,
        )

    def clean(self):
        if not self.cleaned_data['replyaddress']:
            self.cleaned_data['replyaddress'] = self.cleaned_data['fromaddress']
        self.cleaned_data['prizewinners'] = list(
            [
                models.PrizeWinner.objects.get(id=x)
                for x in self.cleaned_data['prizewinners']
            ]
        )
        return self.cleaned_data


class RegistrationForm(forms.Form):
    email = forms.EmailField(label='Email', max_length=254, required=True)

    def clean_email(self):
        user = self.get_existing_user()
        if user is not None and user.is_active:
            raise forms.ValidationError(
                'This email is already registered. Please log in, (or reset your password if you forgot it).'
            )
        return self.cleaned_data['email']

    def save(
        self,
        email_template=None,
        token_generator=default_token_generator,
        from_email=None,
        request=None,
        **kwargs,
    ):
        if not email_template:
            email_template = auth.default_registration_template()
        user = self.get_existing_user()
        if user is None:
            email = self.cleaned_data['email']
            username = email
            if len(username) > 30:
                username = email[:30]
            AuthUser = get_user_model()
            tries = 0
            while user is None and tries < 5:
                try:
                    user = AuthUser.objects.create(
                        username=username, email=email, is_active=False
                    )
                except django.db.utils.IntegrityError:
                    tries += 1
                    username = tracker.util.random_num_replace(
                        username, 8, max_length=30
                    )
            if tries >= 5:
                raise forms.ValidationError(
                    'Something horrible happened, please try again'
                )
        return auth.send_registration_mail(
            request,
            user,
            template=email_template,
            sender=from_email,
            token_generator=token_generator,
        )

    def get_existing_user(self):
        AuthUser = get_user_model()
        email = self.cleaned_data['email']
        userSet = AuthUser.objects.filter(email__iexact=email)
        if userSet.count() > 1:
            raise forms.ValidationError(
                'More than one user has the e-mail {0}. Ideally this would be a db constraint, but django is stupid. Contact SMK to get this sorted out.'.format(
                    email
                )
            )
        if userSet.exists():
            return userSet[0]
        else:
            return None


class RegistrationConfirmationForm(forms.Form):
    username = forms.CharField(
        label='User Name',
        max_length=30,
        required=True,
        validators=[
            validators.RegexValidator(
                r'^[\w.@+-]+$',
                'Enter a valid username. This value may contain only letters, numbers and @/./+/-/_ characters.',
                'invalid',
            )
        ],
    )
    password = forms.CharField(
        label='Password', widget=forms.PasswordInput(), required=True
    )
    passwordconfirm = forms.CharField(
        label='Confirm Password', widget=forms.PasswordInput(), required=True
    )

    def __init__(
        self, user, token, token_generator=default_token_generator, *args, **kwargs
    ):
        super(RegistrationConfirmationForm, self).__init__(*args, **kwargs)
        self.user = user
        self.token = token
        self.token_generator = token_generator
        if not self.check_token():
            self.fields = {}

    def check_token(self):
        if (
            self.user
            and not self.user.is_active
            and self.token
            and self.token_generator
        ):
            return self.token_generator.check_token(self.user, self.token)
        else:
            return False

    def clean_username(self):
        AuthUser = get_user_model()
        cleaned = AuthUser.normalize_username(self.cleaned_data['username'])
        existing = AuthUser.objects.filter(username__iexact=cleaned).exclude(
            pk=self.user.pk
        )
        if existing.exists():
            raise forms.ValidationError(f'Username {cleaned} is already taken')
        return cleaned

    def clean_password(self):
        if not self.cleaned_data['password']:
            raise forms.ValidationError('Password must not be blank.')
        return self.cleaned_data['password']

    def clean(self):
        if not self.check_token():
            raise forms.ValidationError('User token pair is not valid.')
        if 'password' in self.cleaned_data and 'passwordconfirm' in self.cleaned_data:
            if self.cleaned_data['password'] != self.cleaned_data['passwordconfirm']:
                raise forms.ValidationError('Passwords must match.')
        return self.cleaned_data

    def save(self, commit=True):
        if self.user:
            self.user.username = self.cleaned_data['username']
            self.user.set_password(self.cleaned_data['password'])
            self.user.is_active = True
            if commit is True:
                self.user.save()
        else:
            raise forms.ValidationError('Could not save user.')
        return self.user


class PrizeAcceptanceForm(forms.ModelForm):
    class Meta:
        model = models.PrizeWinner
        fields = []

    def __init__(self, *args, **kwargs):
        super(PrizeAcceptanceForm, self).__init__(*args, **kwargs)
        self.accepted = None

        if 'data' in kwargs and kwargs['data'] is not None:
            if 'accept' in kwargs['data']:
                self.accepted = True
            elif 'deny' in kwargs['data']:
                self.accepted = False

        self.fields['count'] = forms.ChoiceField(
            initial=self.instance.pendingcount,
            choices=list([(x, x) for x in range(1, self.instance.pendingcount + 1)]),
            label='Count',
            help_text='You were selected to win more than one copy of this prize, please select how many you would like to take, or press Deny All if you do not want any of them.',
        )
        if self.instance.pendingcount == 1:
            self.fields['count'].widget = forms.HiddenInput()
        self.fields['total'] = forms.IntegerField(
            initial=self.instance.pendingcount,
            validators=[positive],
            widget=forms.HiddenInput(),
        )
        self.fields['comments'] = forms.CharField(
            max_length=512,
            label='Notes',
            required=False,
            help_text='Please put any additional notes here (such as if you have the option of customizing your prize before it is shipped, or additional delivery information).',
            widget=forms.Textarea(attrs=dict(cols=40, rows=2)),
        )

    def clean_total(self):
        if self.instance.pendingcount != self.cleaned_data['total']:
            raise forms.ValidationError(
                'It seems something changed in your status since you loaded the page. Please review and try again.'
            )
        return self.instance.pendingcount

    def clean_count(self):
        count = int(self.cleaned_data['count'])
        if count > self.instance.pendingcount:
            raise forms.ValidationError('Error, count cannot exceed total')
        return count

    def clean(self):
        if self.accepted is False:
            self.cleaned_data['count'] = 0
            self.cleaned_data['accept'] = False
        elif self.accepted is None:
            raise forms.ValidationError(
                'The way you presented your decision was odd. Please make sure you click one of the two buttons.'
            )
        else:
            if self.cleaned_data['count'] == 0:
                raise forms.ValidationError(
                    'You chose accept with 0 prizes. Perhaps you meant to click the other button? If you do not want any of your prizes, simply click the deny button.'
                )
            self.cleaned_data['accept'] = True
        if self.instance.pendingcount < self.cleaned_data['total']:
            raise forms.ValidationError(
                'There was a data inconsistency, please try again.'
            )
        count = self.cleaned_data['count']
        total = self.cleaned_data['total']
        self.instance.acceptcount += count
        self.instance.declinecount += total - count
        self.instance.pendingcount -= total
        if self.cleaned_data['comments']:
            self.instance.winnernotes += self.cleaned_data['comments'] + '\n'
        return self.cleaned_data

    def save(self, commit=True):
        if commit is True:
            self.instance.save()
        return self.instance


class AddressForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(AddressForm, self).__init__(*args, **kwargs)
        self.fields['addresscountry'] = forms.ModelChoiceField(
            queryset=models.Country.objects.all(), required=True
        )
        self.fields['addressstreet'].required = True
        self.fields['addresscity'].required = True
        self.fields['addressstate'].required = True
        self.fields['addresszip'].required = True

    class Meta:
        model = models.Donor
        fields = [
            'addressstreet',
            'addresscity',
            'addressstate',
            'addresscountry',
            'addresszip',
        ]


class NullForm(forms.Form):
    def save(self, commit=True):
        return None


class PrizeAcceptanceWithAddressForm(betterforms.multiform.MultiModelForm):
    form_classes = collections.OrderedDict(
        [('address', AddressForm), ('prizeaccept', PrizeAcceptanceForm)]
    )

    def __init__(self, *args, **kwargs):
        super(PrizeAcceptanceWithAddressForm, self).__init__(*args, **kwargs)
        if not self.forms['prizeaccept'].instance.prize.requiresshipping:
            del self.forms['address']


class PrizeShippingForm(forms.ModelForm):
    class Meta:
        model = models.PrizeWinner
        fields = [
            'shippingstate',
            'shippingcost',
            'shipping_receipt_url',
            'couriername',
            'trackingnumber',
            'shippingnotes',
        ]

    def __init__(self, *args, **kwargs):
        super(PrizeShippingForm, self).__init__(*args, **kwargs)
        self.saved = False
        self.instance = kwargs['instance']
        self.fields['shippingstate'].label = (
            'Shipped yet?' if self.instance.prize.requiresshipping else 'Sent yet?'
        )
        self.fields[
            'shippingcost'
        ].help_text = 'Fill in the amount you would like to be reimbursed for (leave blank for zero)'
        self.fields[
            'shipping_receipt_url'
        ].help_text = 'Please post a url with an image of the shipping receipt here. If you are uncomfortable uploading this image to a web page, you can send the image to {0} instead'.format(
            prizemail.get_event_default_sender_email(self.instance.prize.event)
        )
        self.fields[
            'couriername'
        ].help_text = '(e.g. FedEx, DHL, ...) Optional, but nice if you have it'
        self.fields[
            'trackingnumber'
        ].help_text = 'Optional, and you must also supply the courier name if you want to provide a tracking number'
        self.fields['shippingnotes'].label = 'Additional Notes'
        self.fields[
            'shippingnotes'
        ].help_text = 'Any extra information you would like to relay to the recipient'
        self.fields['shippingnotes'].widget = forms.Textarea(
            attrs=dict(cols=40, rows=2)
        )
        if not self.instance.prize.requiresshipping:
            self.fields['shippingcost'].widget = forms.HiddenInput()
            self.fields['shipping_receipt_url'].widget = forms.HiddenInput()
            self.fields['couriername'].widget = forms.HiddenInput()
            self.fields['trackingnumber'].widget = forms.HiddenInput()


PrizeShippingFormSet = modelformset_factory(models.PrizeWinner, form=PrizeShippingForm)