from django import forms
from django.contrib.auth.models import User
from django.forms.util import ErrorList
from django.core.exceptions import ObjectDoesNotExist, MultipleObjectsReturned
from django.contrib.auth import authenticate, login
from django.utils.safestring import mark_safe
from django.forms.models import modelformset_factory
from captcha.fields import CaptchaField
from django.forms.extras.widgets import SelectDateWidget
from django.utils.translation import ugettext_lazy as _

import datetime

from countrysites.settings import settings as countrysettings

from models import *
from basket import Basket

import re

import widgets

default_choice = [('', '----------')]

SubCategoryFormSet = modelformset_factory(SubCategory)
ProductCategoryFormSet = modelformset_factory(ProductCategory)

class SAIDForm(forms.Form):
    id_number = forms.RegexField(regex='(((\d{2}((0[13578]|1[02])(0[1-9]|[12]\d|3[01])|(0[13456789]|1[012])(0[1-9]|[12]\d|30)|02(0[1-9]|1\d|2[0-8])))|([02468][048]|[13579][26])0229))(( |-)(\d{4})( |-)(\d{3})|(\d{7}))')

class DiscountForm(forms.Form):
    discount = forms.CharField(max_length=30, required=False, label="Promotional Code")

    def clean_discount(self):
        discount = self.cleaned_data['discount'].strip()

        return discount

class SalesReport(forms.Form):

    # payment statuses - this should probably be migrated to the db
    STATUS_CHOICES = (
        (-1, 'all'),
        (0, 'Refunded'),
        (1, 'Voided'),
        (2, 'Pending'),
        (3, 'Failed'),
        (4, 'Authorised'),
        (5, 'Packing'),
        (6, 'Dispatched'),
        (7, 'Complete'),
    )

    QUERY_TYPE = (
        ('yearly', 'Yearly'),
        ('monthly', 'Monthly'),
        ('weekly', 'Weekly'),
        ('daily', 'Daily'),
    )

    RESULT_TYPE = (
        ('onscreen', 'On Screen'),
        ('csv', 'CSV (for excell)'),
    )
    # , input_formats='%d/%m/%y'
    start_date = forms.DateField(label="start date", input_formats=('%d/%m/%y',),initial=datetime.date.today().replace(day=1).strftime('%d/%m/%y'),required=True)
    end_date = forms.DateField(label="end date", input_formats=('%d/%m/%y',), initial=datetime.date.today().strftime('%d/%m/%y'),required=True)
    status = forms.ChoiceField(choices=STATUS_CHOICES, label="Select orders by status", initial=7)
    #query_type = forms.ChoiceField(choices=QUERY_TYPE, label="Results by", initial='daily')
    result_type = forms.ChoiceField(choices=RESULT_TYPE, label="Result type", initial='onscreen')


class ProductCategoryForm(forms.ModelForm):
    """
    A form for the relationship between products and their parent categories
    """
    class Meta:
        model = ProductCategory

class ProductForm(forms.ModelForm):
    """
    A form for the editing of a shop product
    """
    class Meta:
       model = Product

class CategoryForm(forms.ModelForm):
    """
    A form for the editing of a shop category
    """
    class Meta:
       model = Category

class RegisterAccountForm(forms.ModelForm):
    """
    A form with most of the fields needed for registering an account.
    Note that this form is different to the UpdateAccountForm form because
    it doesn't allow the ability to change addresses (purely because the user
    won't yet have any at registration point). Also assumes that the customer
    must agree to some terms and conditions at registration.
    """
    # tsandcs = forms.BooleanField(help_text="I agree to the Terms and Conditions below",error_messages={'required': 'You must agree to the Terms and Conditions'})
    #captcha = CaptchaField(label="Verification Code")

    class Meta:
       model = Account
       exclude = ('user','default_address','temporary','dob','gender','malinglist','informed','security_question')

''' class QuickPayAccountForm(forms.ModelForm):
    """ """
    A form with most of the fields needed for registering an account ergo just
    for the sake of ergo.
    Note that this form is different to the UpdateAccountForm form because
    it doesn't allow the ability to change addresses (purely because the user
    won't yet have any at registration point). Also assumes that the customer
    must agree to some terms and conditions at registration.
    """ """
    # tsandcs = forms.BooleanField(help_text="I agree to the Terms and Conditions below",error_messages={'required': 'You must agree to the Terms and Conditions'})
    #captcha = CaptchaField(label="Verification Code")

    class Meta:
       model = Account
       exclude = ('user','default_address','temporary','security_question','security_answer','feedback')

class UpdateAccountForm(forms.ModelForm):
    """ """
    Partnering RegisterAccountForm, this version allows the editing of both
    address fields and insists that the 'instance' keyword is supplied to the
    constructor, indicating an update. Builds the list of address choices
    dynamically, from those assigned to the related account.
    """ """
    class Meta:
       model = Account
       exclude = ('user','temporary')

    def __init__(self, *args, **kwargs):
        """ """
        Set the address choices for this account to be those that already exist
        against the account
        """ """
        super(UpdateAccountForm, self).__init__(*args, **kwargs)
        if not 'instance' in kwargs:
            raise TypeError("UpdateAccountForm requires keyword paramter 'instance'")

        address_choices = [(address.id, str(address)) for address in kwargs['instance'].address_set.all()]
        self.fields['default_address'].choices = address_choices

class LoginForm(forms.Form):
    """ """
    A helper form for logging in customers. This form actually performs a log in
    when clean is called, assuming the email and password combination is valid.
    """ """
    email = forms.EmailField()
    password = forms.CharField(widget=forms.PasswordInput,min_length=5)

    def __init__(self, request, data=None, files=None, auto_id='id_%s', prefix=None,
            initial=None, error_class=ErrorList, label_suffix=':',
            empty_permitted=False):
        """ """
        Save a reference to the request object on this instance
        """ """
        super(LoginForm, self).__init__(data, files, auto_id, prefix, initial, error_class, label_suffix, empty_permitted)
        self.request = request

    def clean(self):
        """ """
        Process the log in request. If both email and password data has been
        entered, this function first tries to retrieve a matching account
        object from the database which is both persistent and non-staff. If
        successful, the username is passed through the django authenticate
        mechanism to check whether the username and password is correct.
        """ """
        cleaned_data = self.cleaned_data
        email = cleaned_data.get('email')
        password = cleaned_data.get('password')

        if email and password:
            try:
                user = Account.objects.get(user__email=email, user__is_staff=False, temporary=False).user
            except ObjectDoesNotExist:
                raise forms.ValidationError("No customer exists with that email address")
            except MultipleObjectsReturned:
                raise forms.ValidationError("Unfortunately, there seems to be an issue. We have two accounts with that email address and cannot log you in! "
                    "This should not happen and is likely a bug with our software. Please get in touch and notify us of this issue.")
            user = authenticate(username=user.username, password=password)
            if user is not None:
                if user.is_active:
                    login(self.request, user)
                else:
                    # Possibly email admin here to notify of attempted access to locked account
                    raise forms.ValidationError("Your account has been temporarily locked.")
            else:
                raise forms.ValidationError("The password for that account is incorrect")
            self.user = user

        return cleaned_data
'''
class DiscountCodeForm(forms.Form):
    """
    A form that allows the customer to enter a discount code on their basket.
    The clean method implements the logic that inserts the discount on to the
    basket, if the offer code validates
    """
    discount_code = forms.CharField(label=_("Discount Code:"), required=False)
    '''    def __init__(self, data=None, files=None, auto_id='id_%s', prefix=None,
            initial=None, error_class=ErrorList, label_suffix=':',
            empty_permitted=False):
        """
        If the customer has already set a discount code, then populate it's
        initial value correctly on the form
        """

        super(DiscountCodeForm, self).__init__(data, files, auto_id, prefix, initial, error_class, label_suffix, empty_permitted)

        #discount = basket.discount
        #if discount:
        #    self.fields['discount_code'].initial = discount.code

     def clean(self):
        """
        Validate that the discount code being passed to this form exists in
        the database.
        """
        cleaned_data = self.cleaned_data

        #discount_code = cleaned_data.get('discount_code')

        #if discount_code:
        #    try:
        #        offer = Offer.objects.get(public=True,code=discount_code)
        #    except ObjectDoesNotExist, MultipleObjectsReturned:
        #        self._errors["discount_code"] = ErrorList([u"Discount code not found"])

        #return '' #cleaned_data '''

class BasketRowForm(forms.Form):
    """
    A form that allows quantities to be updated per row on the basket. This
    allows for the change of quantities and the deletion of the row entirely
    via the checkbox
    """
    operate = forms.BooleanField(required=False)
    quantity = forms.IntegerField(required=False,min_value=0)

    def __init__(self, basket_item, data=None, files=None, auto_id='id_%s', initial=None,
            error_class=ErrorList, label_suffix=':', empty_permitted=False):
        """
        Change the initial value of this row's quantity field to be the value
        in the basket row.
        """
        prefix = basket_item.item.id
        super(BasketRowForm, self).__init__(data, files, auto_id, prefix, initial, error_class, label_suffix, empty_permitted)
        self.fields['quantity'].initial = basket_item.quantity
'''
class PasswordResetForm(forms.Form):
    """
    This form provides validation for the second step of the password reset
    process. It validates valid passwords and that the answer is valid for the
    given user's question
    """
    answer = forms.CharField()
    new_password = forms.CharField(widget=forms.PasswordInput,min_length=5)
    confirm_password = forms.CharField(widget=forms.PasswordInput,min_length=5)

    def __init__(self, password_request, data=None, files=None, auto_id='id_%s', prefix=None,
            initial=None, error_class=ErrorList, label_suffix=':',
            empty_permitted=False):
        """
        Set the label of the answer field to be the question that the customer
        selected and store a reference to the password request object in this
        instance
        """
        super(PasswordResetForm, self).__init__(data, files, auto_id, prefix, initial, error_class, label_suffix, empty_permitted)
        self.fields['answer'].label = str(password_request.account.security_question)
        self.password_request = password_request

    def clean(self):
        """
        Ensure that the new passwords being chosen match and that the answer
        is correct for this customer's chosen question. Also ensure that the
        associated password request is still in-date and valid
        """
        cleaned_data = self.cleaned_data

        new_password = cleaned_data.get("new_password")
        confirm_password = cleaned_data.get("confirm_password")

        if new_password != confirm_password:
            self._errors["new_password"] = ErrorList([u"Your passwords did not match"])

        answer = cleaned_data.get('answer')

        if answer:
            if str(answer).lower() != str(self.password_request.account.security_answer).lower():
                self._errors["answer"] = ErrorList([u"This answer is incorrect"])

        if not self.password_request.is_valid():
            raise forms.ValidationError("This password reset request is no longer valid.")

        return cleaned_data

class ForgottenPasswordForm(forms.Form):
    """
    The first step in the forgotten password process. Requests that you enter
    your email address and complete a captcha. On success, an email should be
    sent out with a link to the second stage of this process
    """
    email = forms.EmailField()
    #captcha = CaptchaField(label="Verification Code")

    def clean(self):
        """
        Provide validation that the email being entered exists in the database
        for a persistent store account
        """
        cleaned_data = self.cleaned_data
        email = cleaned_data.get('email')

        if email:
            try:
                user = Account.objects.get(user__email=email, user__is_staff=False, temporary=False)
            except ObjectDoesNotExist:
                raise forms.ValidationError("No customer exists with that email address")
            except MultipleObjectsReturned:
                raise forms.ValidationError("Unfortunately, there seems to be an issue. We have two accounts with that email address and cannot retreive a password! "
                    "This should not happen and is likely a bug with our software. Please get in touch and notify us of this issue.")
        return cleaned_data
'''
class AddressForm(forms.ModelForm):
    """
    Add new addresses. It is assumed that when adding an address, the customer
    will be logged in, so we don't want, or need, them to choose the related
    account. This will come from session data.
    """

    country = forms.ModelChoiceField(queryset=Country.objects,widget=widgets.SelectCountry)

    class Meta:
       model = Address
       exclude = ('account',)

    def __init__(self, *args, **kwargs):
        super(AddressForm, self).__init__(*args, **kwargs)
        self.fields['country'].initial = 1
        if countrysettings.country == 'me':
            self.fields['county'].label = 'State'
            self.fields['postcode'].required = False
        else:
            self.fields['postcode'].required = True

class AddressForm_me(forms.ModelForm):
    """
    Add new addresses. It is assumed that when adding an address, the customer
    will be logged in, so we don't want, or need, them to choose the related
    account. This will come from session data.
    """

    country = forms.ModelChoiceField(queryset=Country.objects,widget=widgets.SelectCountry)

    class Meta:
       model = Address_me
       exclude = ('account',)

    def __init__(self, *args, **kwargs):
        super(AddressForm_me, self).__init__(*args, **kwargs)
        self.fields['country'].initial = 1


'''
class DeliveryOptions(forms.Form):
    """
    Choose your delivery method! Also provides an extra information box if the
    customer wishes to provide extra delivery instructions
    """
    method = forms.ChoiceField(widget=forms.RadioSelect(),error_messages={'required': 'Please select a shipping option.'})
    information = forms.CharField(widget=forms.Textarea(),required=False)

    def has_choices(self):
        """
        Return True if the number of shipping methods available to the customer
        is at least one. False otherwise.
        """
        return len(self.fields['method'].choices) > 0

    def num_choices(self):
        """
        Return the number of shipping methods available in the customers chosen
        region
        """
        return len(self.fields['method'].choices)

    def method_choices(self):
        """
        Return the choices available for the shipping method, this will be
        returned as a list of 2-item tuples
        """
        return self.fields['method'].choices

    def __init__(self, account, basket, data=None, files=None, auto_id='id_%s', prefix=None,
            initial=None, error_class=ErrorList, label_suffix=':',
            empty_permitted=False):
        """
        If the customer has already chosen a delivery method then set the method
        default to that chosen method, also, pre-populate the information field
        if the customer has already specified some delivery instructions
        """
        super(DeliveryOptions, self).__init__(data, files, auto_id, prefix, initial, error_class, label_suffix, empty_permitted)

        if basket.delivery_address:
            bands = basket.delivery_address.country.zone.band_set.all()
            self.fields['method'].choices = ((band.postage.id, mark_safe(band.display_line(account))) for band in bands)

            if basket.postage:
                self.fields['method'].initial = basket.postage.id

        if basket.delivery_instructions:
            self.fields['information'].initial = basket.delivery_instructions

class AddressSelectForm(forms.ModelForm):
    """
    Select the address you want the item shipping to. It is assumed that when
    adding an address, the customer will be logged in, so we don't want, or
    need, them to choose the related account. This will come from session data.
    """
    existing_address = forms.ChoiceField(label="Existing addresses", widget=forms.RadioSelect(), required=False)

    class Meta:
       model = Address
       exclude = ('account',)

    def __init__(self, *args, **kwargs):
        """
        Store references to the account and basket that should be passed to this
        form as keyword parameters (account, basket).
        """
        self.account = kwargs.pop('account')
        self.basket = kwargs.pop('basket')
        super(AddressSelectForm, self).__init__(*args, **kwargs)

        value = self.fields.pop('existing_address')
        self.fields.insert(0, 'existing_address', value)

        self.refresh_address_options()

    def refresh_address_options(self):
        """
        Generate a new list of valid addresses for this customer.
        """
        default_addr = None

        if self.basket.delivery_address:
            default_addr = self.basket.delivery_address.id
        elif self.account.default_address:
            default_addr = self.account.default_address.id

        addresses = [(addr.id,mark_safe("<br/>".join(addr.line_list()))) for addr in self.account.address_set.all()] + [('','Use Another')]

        self.fields['existing_address'].choices = addresses
        self.fields['existing_address'].initial = default_addr

    def clean(self):
        """
        Remove all errors related to the existing_address field. They won't be
        valid anyway
        """
        cleaned_data = self.cleaned_data

        if cleaned_data.get("existing_address"):
            for k, v in self._errors.items():
               del self._errors[k]

        return cleaned_data

class QuickPayUserForm(forms.ModelForm):
    """
    A base User form that implements logic for ensuring that the email being
    used is not already used by a persistent account. It will however allow a
    registration for a duplicate email address if that email is only used by
    temporary account holders!
    Unlike the account forms, which are separated into two distinct classes,
    the UserForm class takes a keyword parameter in it's constructor, which,
    if True, tells the class to apply validation as if it were an
    update, rather than an insertion. This lets us ignore email collisions in
    the user table.
    """

    class Meta:
       model = User
       fields = ('first_name','last_name','email')

    def __init__(self, *args, **kwargs):
        """
        Make it so that first name, last name and email addresses are required
        inputs, even though they're allowed to be blank in the User class
        Django provides
        """
        super(QuickPayUserForm, self).__init__(*args, **kwargs)

        self.update = 'instance' in kwargs

        # We really need this data
        self.fields['first_name'].required = True
        self.fields['last_name'].required = True
        self.fields['email'].required = True

    def clean(self):
        """
        Check that the email address being used is not already taken by a
        permanent member of the site
        """
        cleaned_data = self.cleaned_data

        email = cleaned_data.get('email')

        clashes = Account.objects.filter(user__email=email, user__is_staff=False, temporary=False)

        if self.update:
            clashes = clashes.exclude(user__id=self.instance.id)

        if clashes.count():
            self._errors["email"] = ErrorList([u"A customer with that email address already exists"])

        return cleaned_data

class UserForm(QuickPayUserForm):
    """
    A extension of the QuickPayUserForm. This form also deals with passwords
    because we're now concerning ourself with persistant users rather than
    temporary ones.
    """
    password = forms.CharField(widget=forms.PasswordInput,min_length=5)
    confirm_password = forms.CharField(widget=forms.PasswordInput,min_length=5)

    def __init__(self, *args, **kwargs):
        """
        Make it so that the password and confirm_password fields are not
        required if we're performing an update rather than an insert on the
        User
        """
        super(UserForm, self).__init__(*args, **kwargs)

        if self.update:
            self.fields['password'].required = False
            self.fields['confirm_password'].required = False

    def clean(self):
        """
        Check that the passwords match
        """
        super(UserForm, self).clean()

        cleaned_data = self.cleaned_data

        password = cleaned_data.get("password")
        confirm_password = cleaned_data.get("confirm_password")

        self.set_password = password and confirm_password
        if self.set_password and password != confirm_password:
            self._errors["password"] = ErrorList([u"Your passwords did not match"])

        return cleaned_data
'''
CARD_TYPES = (
	(0, 'VISA', 'Visa'),
	(1, 'MC', 'Master Card'),
	(2, 'DELTA', 'Delta'),
	(3, 'SOLO', 'Solo'),
	(4, 'MAESTRO', 'Maestro / Switch'),
	(5, 'UKE', 'Visa Electron'),
	# (6, 'JCB', 'JCB'),
	#(7, 'AMEX', 'Amex'),
	# (8, 'DC', 'Diners Club'),
)

CARD_TYPES_CHOICES = [(aid, adesc) for aid, vpsid, adesc in CARD_TYPES]

class PaymentForm(forms.Form):
    """
    A payment form that requests credit card details off the customer
    for forwarding on to payment gateways such as protx
    """

    card_holder = forms.CharField(label=_('Name on Card'), max_length=300)
    card_number = forms.RegexField(label=_('Card Number'), max_length=26, regex=r'^[0-9\ ]{12,26}$', error_messages={'invalid': _('Please enter a valid card number')})

    expiry_month = forms.IntegerField(label='MM', min_value=1, max_value=12, widget=forms.TextInput(attrs={'size': '3', 'maxlength': '2'}))
    expiry_year = forms.IntegerField(label='YY', min_value=1, max_value=99, widget=forms.TextInput(attrs={'size': '3', 'maxlength': '2'}))

    ccv = forms.CharField(label=_('Security Number'), widget=forms.TextInput(attrs={'size': '5', 'maxlength': '4'}))
    card_type = forms.ChoiceField(label=_('Card Type'), widget=forms.Select, choices=CARD_TYPES_CHOICES)

    start_month = forms.IntegerField(required=False, label='MM', min_value=1, max_value=12, widget=forms.TextInput(attrs={'size': '3', 'maxlength': '2'}))
    start_year = forms.IntegerField(required=False, label='YY', min_value=1, max_value=99, widget=forms.TextInput(attrs={'size': '3', 'maxlength': '2'}))

    issue_number = forms.CharField(required=False, label=_('Issue Number'), widget=forms.TextInput(attrs={'size': '3', 'maxlength': '3'}))

    def clean(self):
        """
        Remove white spaces from the card number
        """
        cleaned_data = self.cleaned_data

        if 'card_number' in cleaned_data:
            cleaned_data['card_number'] = re.sub("\s+", "", cleaned_data['card_number'])

        return cleaned_data
class BuyerForm(forms.ModelForm):
    """
    A payment form that requests credit card details off the customer
    for forwarding on to payment gateways such as protx
    """
    class Meta:
        model = User
        fields = ('first_name','last_name','email')
        #exclude = ('is_staff','is_active','last_login','date_joined','username','password','user_permissions','groups','is_superuser')

    first_name = forms.CharField(label=_('First name'), max_length=200,required=True)
    last_name = forms.CharField(label=_('Surname'), max_length=200,required=True)
    #dob = forms.DateField(label='DOB', widget=SelectDateWidget(years=range(2006,1900,-1)))
    #gender = forms.CharField(label='Gender', widget=forms.RadioSelect(choices=(('Male','Male'),('Female','Female'))), required=True)
    #phone = forms.CharField(label='Phone number', max_length=50,required=True)
    email = forms.EmailField(label=_('Email'), max_length=500,required=True)

    def clean(self):
        cleaned_data = self.cleaned_data
        return cleaned_data

class AccountForm(forms.ModelForm):
    """
    A payment form that requests credit card details off the customer
    for forwarding on to payment gateways such as protx
    """
    class Meta:
        model = Account
        fields = ('dob','gender','telephone')
        #exclude = ('is_staff','is_active','last_login','date_joined','username','password','user_permissions','groups','is_superuser')

    dob = forms.DateField(label=_('DOB'), widget=SelectDateWidget(years=range(2006,1900,-1)))
    gender = forms.CharField(label=_('Gender'), widget=forms.RadioSelect(choices=(('Male',_('Male')),('Female',_('Female')))), required=True)
    telephone = forms.CharField(label=_('Phone number'), max_length=50,required=True)

    def clean(self):
        cleaned_data = self.cleaned_data
        return cleaned_data


class TermsForm(forms.Form):

#    informed = forms.BooleanField(label='Keeping you informed',required=False)
    mailing = forms.BooleanField(label=_('Add to mailing list'),required=False)
    terms = forms.BooleanField(label=_('I accept the T&C\'s'), required=True)

    def clean(self):
        """
        Remove white spaces from the card number
        """
        cleaned_data = self.cleaned_data


        return cleaned_data