from django import forms
from django.contrib.auth.models import User
from django.core.validators import MinLengthValidator
from django.utils.translation import  gettext_lazy as _

#https://docs.djangoproject.com/en/3.1/ref/forms/widgets/
from crispy_forms.helper import FormHelper
from crispy_forms.layout import Layout, Div, Submit, HTML, Button, Row, Field, Column
from crispy_forms.bootstrap import AppendedText, PrependedText, FormActions

class UserSignUpForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(UserSignUpForm, self).__init__(*args, **kwargs)
        self.fields['first_name'].required = True
        self.fields['last_name'].required = True

    who = forms.ChoiceField(
        choices=[('student', 'Student'), ('teacher', 'Teacher')],
        label="",
        required=True,
        widget=forms.RadioSelect(
            attrs={'style':'max-width: 20em; ', 'autocomplete':'off', })
    )
    password = forms.CharField(
        label="Password",
        validators=[MinLengthValidator(8, message="Minimum 8 characters")],
        widget=forms.PasswordInput(attrs={'autocomplete':'off'}))
    confirm_password = forms.CharField(
        label="Confirm password",
        validators=[MinLengthValidator(8, message="Minimum 8 characters"), ],
        widget=forms.PasswordInput(attrs={'autocomplete':'off'}))

    class Meta:
        model = User
        fields = ('who', "username", 'first_name', 'last_name', "password", )
        help_texts = {"username": None}
        widgets = {
            'username': forms.TextInput(attrs={}),
            'first_name': forms.TextInput(attrs={}),
            'last_name': forms.TextInput(attrs={}),

        }

    def clean(self):
        cleaned_data = super(UserSignUpForm, self).clean()
        password = cleaned_data.get("password")
        confirm_password = cleaned_data.get("confirm_password")
        if password != confirm_password:
            msg = _(f'Password and confirm password does not match')
            self.add_error('password', msg)
            self.add_error('confirm_password', msg)

    helper = FormHelper()
    helper.form_tag = 'false'
    helper.attrs = {"novalidate": True, 'autocomplete':'off'}
    helper.form_class = 'form-horizontal'
    helper.field_class = 'col-md-8 '
    helper.label_class = 'col-md-4'
    helper.layout = Layout(
        Row(
            Column(
                Field('who', css_class='form-group', style='margin-left:200px'),
                Field('username', css_class='form-group ', style=''),
                Field('first_name', css_class='form-group'),
                Field('last_name', css_class='form-group'),
                Field('password', css_class='form-group'),
                Field('confirm_password', css_class='form-group'),

                FormActions(
                    Submit('save', 'Sign up', css_class="btn-primary"),
                    Submit('cancel', 'Cancel'),
                    ),

            )
        )
    )

class UserLoginForm(forms.Form):
    username = forms.CharField(widget=forms.TextInput(
        attrs={
            "class": "form-control"
        }))
    password = forms.CharField(
        widget=forms.PasswordInput(
            attrs={
                "class": "form-control",
                "id": "user-password"
            }
        )
    )
    def clean_username(self):
        username = self.cleaned_data.get("username")
        qs = User.objects.filter(username__iexact=username) # thisIsMyUsername == thisismyusername
        if not qs.exists():
            raise forms.ValidationError("This is an invalid user.")
        if qs.count() != 1:
            raise forms.ValidationError("This is an invalid user.")
        return username


    helper = FormHelper()
    helper.form_tag = 'false'
    helper.attrs = {'autocomplete':'off'}
    helper.form_class = 'form-horizontal'
    helper.field_class = 'col-md-8 '
    helper.label_class = 'col-md-4'
    helper.layout = Layout(
        Row(
            Column(
                Field('username', css_class='form-group ', style=''),
                Field('password', css_class='form-group'),

                FormActions(
                    Submit('submit', 'Sign in', css_class="btn-primary"),
                    Submit('cancel', 'Cancel'),
                    ),

            )
        )
    )