from django import forms

from django.conf import settings

from django.contrib.auth import get_user_model

from django.contrib.auth.forms import UserCreationForm, UserChangeForm

from django.contrib.auth.models import Group

from django.forms.util import ErrorList

from django.utils.translation import gettext as _

User = get_user_model()

class LdtForm(UserCreationForm):

    class Meta:

        model = User

    def __init__(self, data=None, files=None, auto_id='id_%s', prefix=None,

                 initial=None, error_class=ErrorList, label_suffix=':',

                 empty_permitted=False, instance=None):

        if instance:

            initial = initial or {}           

        super(LdtForm, self).__init__(data, files, auto_id, prefix,

            initial, error_class, label_suffix, empty_permitted, instance)

        if instance:

            self.fields['password1'].required = False

            self.fields['password1'].label = _('New password')

            self.fields['password2'].required = False

            self.fields['password2'].label = _('New password confirmation')

        self._password_change = True

    def clean_username(self):

        if self.instance:

            return self.cleaned_data['username']

        return super(LdtForm, self).clean_username()

    def clean_password2(self): 

        if self.instance and self.cleaned_data['password1'] == '' and self.cleaned_data['password2'] == '':

            self._password_change = False

            return u''

        return super(LdtForm, self).clean_password2()

    def save(self, commit=True):

        Super = self._password_change and LdtForm  or UserCreationForm  

        user = super(Super, self).save(commit=False)

        # if user.pk != None:

            # self.save_m2m()

        if commit:

            user.save()

        return user

class EmailChangeForm(forms.Form):

    email1 = forms.EmailField(label=_("E-mail"), max_length=75)

    email2 = forms.EmailField(label=_("E-mail"), max_length=75)

    def __init__(self, user=None, *args, **kwargs):

        self.user = user

        super(EmailChangeForm, self).__init__(*args, **kwargs)

    def clean_email2(self):

        email1 = self.cleaned_data.get('email1')

        email2 = self.cleaned_data.get('email2')

        if email1 and email2:

            if email1 != email2:

                raise forms.ValidationError(_("The two emails didn't match."))

        return email2

    def save(self):

        self.user.email = self.cleaned_data['email1']

        self.user.save()

        return self.user

class NameChangeForm(forms.Form):

    first_name = forms.CharField(label=_("First name"), max_length=30)

    last_name = forms.CharField(label=_("Last name"), max_length=30)

    def __init__(self, user=None, *args, **kwargs):

        self.user = user

        super(NameChangeForm, self).__init__(*args, **kwargs)

    def save(self):

        self.user.first_name = self.cleaned_data['first_name']

        self.user.last_name = self.cleaned_data['last_name']

        self.user.save()

        return self.user

class ProfileForm(UserChangeForm):

    def __init__(self, user=None, *args, **kwargs):

        #self.user = user

        super(ProfileForm, self).__init__(*args, **kwargs)

    class Meta:

        model = User

        fields = ('username', 'email', 'first_name', 'last_name', 'password')

class LanguageChangeForm(forms.Form):

    language = forms.ChoiceField(label=_("Language"), choices=settings.LANGUAGES)

    def __init__(self, user=None, *args, **kwargs):

        self.user = user

        super(LanguageChangeForm, self).__init__(*args, **kwargs)

    def save(self):

        return self.user

class PictureForm(forms.Form):

    image=forms.ImageField(label=_("Profile picture"), required=False)

    url_image=forms.CharField(max_length=1024, required=False)

    def __init__(self, model=None, *args, **kwargs):

        self.model = model

        super(PictureForm, self).__init__(*args, **kwargs)

    def clean_image(self):

        image = self.cleaned_data['image']

        if image and image.size > settings.PROFILE_IMG_MAX_SIZE:

            raise forms.ValidationError(_("Image size is limited to %s" % settings.PROFILE_IMG_MAX_SIZE))

        return image

    def save(self):

        if not self.cleaned_data['image']:

            return None

        class_name = self.model.__class__.__name__

        if isinstance(self.model, Group):

            instance_name = "%s" % self.model.id

            img_container = self.model.get_profile()

        if isinstance(self.model, User):

            instance_name = "%s" % self.model.id

            img_container = self.model

        elif class_name == 'Content':

            instance_name = self.model.iri_id

            img_container = self.model

        elif class_name == 'Project':

            instance_name = self.model.ldt_id

            img_container = self.model

        # We change the file name and keep the extension.

        filename = self.cleaned_data['image'].name

        ext = filename.split(".")[-1]

        self.cleaned_data['image'].name = instance_name + "." + ext

        # We save the picture with the correct name

        img_container.image = self.cleaned_data['image']

        img_container.save()

        return self.model