from django import forms
from base.viewsets import BaseTable, BaseViewset
from crud.tables2_columns import CrudLinkColumn
from django.db.models import Q
from django_tables2 import Column, BooleanColumn, DateTimeColumn
from django.contrib.auth import password_validation
from django.contrib.auth.forms import UsernameField
import django_filters
from crud.tables2_columns import DateTimeColumnEx
from . import models, decorators

class UserFilterSet(django_filters.FilterSet):
    search_expr = django_filters.CharFilter(label='Search', method='filter_search_expr')

    class Meta:
        fields = ('search_expr',)
        model = models.User

    def filter_search_expr(self, queryset, name, value):
        return queryset.filter(Q(username__icontains=value) | Q(first_name__icontains=value) | Q(last_name__icontains=value) | Q(email__icontains=value))

class UserTable(BaseTable):
    is_active = BooleanColumn(verbose_name='Active')
    is_superuser = BooleanColumn(verbose_name='Superuser')
    last_login = DateTimeColumnEx()
    delete = CrudLinkColumn('delete', text='', verbose_name='', orderable=False, attrs={'a': {'class': 'btn btn-danger btn-xs glyphicon glyphicon-remove', 'role': 'button'}})

    class Meta(BaseTable.Meta):
        fields = ('username', 'first_name', 'last_name', 'email', 'is_superuser', 'is_active', 'last_login')
        order_by = ('username',)

class UserForm(forms.ModelForm):
    username = UsernameField()
    email = forms.EmailField(required=True)
    is_superuser = forms.BooleanField(label='Superuser', required=False)
    password1 = forms.CharField(
        label="Password",
        strip=False,
        required=False,
        widget=forms.PasswordInput,
        help_text=password_validation.password_validators_help_text_html(),
    )
    password2 = forms.CharField(
        label="Confirm password",
        strip=False,
        required=False,
        widget=forms.PasswordInput,
        help_text="Enter the same password as before, for verification.",
    )

    class Meta:
        fields = ('username', 'first_name', 'last_name', 'email', 'password1', 'password2', 'is_superuser', 'is_active')
        model = models.User

    def customise_for_view(self, view):
        if view.view_type == 'create':
            self.fields['password1'].required = True

    def clean_password2(self):
        password1 = self.cleaned_data.get('password1')
        password2 = self.cleaned_data.get('password2')
        if password1 or password2:
            if password1 != password2:
                raise forms.ValidationError('The two passwords did not match.', code='password_mismatch')
            self.instance.username = self.cleaned_data.get('username')
            password_validation.validate_password(password1, self.instance)
        return password2

    def save(self, commit=True):
        user = super(UserForm, self).save(commit=False)
        password1 = self.cleaned_data['password1']
        if password1:
            user.set_password(password1)
        if commit:
            user.save()
        return user

class UserViewset(BaseViewset):
    view_decorator = staticmethod(decorators.https_and_superuser_required)

    filter_class = UserFilterSet
    form_class = UserForm
    tables2_class = UserTable
    tables2_clickable_rows = True

    detail_view_title = 'User'
    detail_view_template_name = 'accounts/user_detail_view.html'

    def get_queryset(self, view):
        return models.User.objects.all()