from django.contrib import admin
from django.contrib.auth.forms import ReadOnlyPasswordHashField
from django.contrib.auth.models import Group
from django import forms
from .models import User


class UserCreationForm(forms.ModelForm):
    """A form for creating new users. Includes all the required
    fields, plus a repeated password."""
    password1 = forms.CharField(label='Password', widget=forms.PasswordInput)
    password2 = forms.CharField(label='Password confirmation', widget=forms.PasswordInput)

    class Meta:
        model = User
        fields = ('email', 'age', 'name')

    def clean_password2(self):
        # Check that the two password entries match
        password1 = self.cleaned_data.get("password1")
        password2 = self.cleaned_data.get("password2")
        if password1 and password2 and password1 != password2:
            raise forms.ValidationError("Passwords don't match")
        return password2


    def save(self, commit=True):
        # Save the provided password in hashed format
        user = super(UserCreationForm, self).save(commit=False)
        user.set_password(self.cleaned_data["password1"])
        if commit:
            user.save()
        return user


class UserChangeForm(forms.ModelForm):
    """A form for updating users. Includes all the fields on
    the user, but replaces the password field with admin's
    password hash display field.
    """
    password = ReadOnlyPasswordHashField(label=("Password"),
                                         help_text=("Raw passwords are not stored, so there is no way to see "
                                                    "this user's password, but you can change the password "
                                                    "using <a href=\"password/\">this form</a>."))

    class Meta:
        model = User
        fields = ('email', 'age', 'name','password')

    def clean_password(self):
        # Regardless of what the user provides, return the initial value.
        # This is done here, rather than on the field, because the
        # field does not have access to the initial value
        return self.initial["password"]


class CustomUserAdmin(admin.ModelAdmin):
    # The forms to add and change user instances
    form = UserChangeForm
    add_form = UserCreationForm
    model = User
    # The fields to be used in displaying the User model.
    # These override the definitions on the base UserAdmin
    # that reference specific fields on auth.User.
    list_display = ('email', 'name', 'age', 'is_superuser')
    list_filter = ('is_superuser',)
    fieldsets = (
        (None, {'fields': ('email', 'password')}),
        ('Personal info', {'fields': ('name','age')}),
    )
    add_fieldsets = (
        (None, {
            'classes': ('wide',),
            'fields': ('email', 'name','age', 'password1', 'password2')}
         ),
    )
    search_fields = ('email',)
    ordering = ('email',)
    filter_horizontal = ()

    def get_fieldsets(self, request, obj=None):
        if not obj:
            return self.add_fieldsets
        return self.fieldsets

    def get_form(self, request, obj=None, change=False, **kwargs):
        if not obj:
            return self.add_form
        return self.form


admin.site.register(User, CustomUserAdmin)
admin.site.unregister(Group)