from __future__ import unicode_literals

from datetime import date
import warnings

from django import forms
from django.contrib.admin.options import (ModelAdmin, TabularInline,
     HORIZONTAL, VERTICAL)
from django.contrib.admin.sites import AdminSite
from django.contrib.admin.widgets import AdminDateWidget, AdminRadioSelect
from django.contrib.admin.validation import ModelAdminValidator
from django.contrib.admin import (SimpleListFilter,
     BooleanFieldListFilter)
from django.core.checks import Error
from django.core.exceptions import ImproperlyConfigured
from django.forms.models import BaseModelFormSet
from django.forms.widgets import Select
from django.test import TestCase

from .models import Band, Concert, ValidationTestModel, ValidationTestInlineModel


class MockRequest(object):
    pass


class MockSuperUser(object):
    def has_perm(self, perm):
        return True

request = MockRequest()
request.user = MockSuperUser()


class ModelAdminTests(TestCase):

    def setUp(self):
        self.band = Band.objects.create(
            name='The Doors',
            bio='',
            sign_date=date(1965, 1, 1),
        )
        self.site = AdminSite()

    # form/fields/fieldsets interaction ##############################

    def test_default_fields(self):
        ma = ModelAdmin(Band, self.site)

        self.assertEqual(list(ma.get_form(request).base_fields),
            ['name', 'bio', 'sign_date'])

        self.assertEqual(list(ma.get_fields(request)),
            ['name', 'bio', 'sign_date'])

        self.assertEqual(list(ma.get_fields(request, self.band)),
            ['name', 'bio', 'sign_date'])

    def test_default_fieldsets(self):
        # fieldsets_add and fieldsets_change should return a special data structure that
        # is used in the templates. They should generate the "right thing" whether we
        # have specified a custom form, the fields argument, or nothing at all.
        #
        # Here's the default case. There are no custom form_add/form_change methods,
        # no fields argument, and no fieldsets argument.
        ma = ModelAdmin(Band, self.site)
        self.assertEqual(ma.get_fieldsets(request),
            [(None, {'fields': ['name', 'bio', 'sign_date']})])

        self.assertEqual(ma.get_fieldsets(request, self.band),
            [(None, {'fields': ['name', 'bio', 'sign_date']})])

    def test_get_fieldsets(self):
        # Test that get_fieldsets is called when figuring out form fields.
        # Refs #18681.

        class BandAdmin(ModelAdmin):
            def get_fieldsets(self, request, obj=None):
                return [(None, {'fields': ['name', 'bio']})]

        ma = BandAdmin(Band, self.site)
        form = ma.get_form(None)
        self.assertEqual(form._meta.fields, ['name', 'bio'])

        class InlineBandAdmin(TabularInline):
            model = Concert
            fk_name = 'main_band'
            can_delete = False

            def get_fieldsets(self, request, obj=None):
                return [(None, {'fields': ['day', 'transport']})]

        ma = InlineBandAdmin(Band, self.site)
        form = ma.get_formset(None).form
        self.assertEqual(form._meta.fields, ['day', 'transport'])

    def test_lookup_allowed_allows_nonexistent_lookup(self):
        """
        Ensure that a lookup_allowed allows a parameter
        whose field lookup doesn't exist.
        Refs #21129.
        """
        class BandAdmin(ModelAdmin):
            fields = ['name']

        ma = BandAdmin(Band, self.site)
        self.assertTrue(ma.lookup_allowed('name__nonexistent', 'test_value'))

    def test_field_arguments(self):
        # If we specify the fields argument, fieldsets_add and fielsets_change should
        # just stick the fields into a formsets structure and return it.
        class BandAdmin(ModelAdmin):
            fields = ['name']

        ma = BandAdmin(Band, self.site)

        self.assertEqual(list(ma.get_fields(request)), ['name'])

        self.assertEqual(list(ma.get_fields(request, self.band)), ['name'])

        self.assertEqual(ma.get_fieldsets(request),
            [(None, {'fields': ['name']})])

        self.assertEqual(ma.get_fieldsets(request, self.band),
            [(None, {'fields': ['name']})])

    def test_field_arguments_restricted_on_form(self):
        # If we specify fields or fieldsets, it should exclude fields on the Form class
        # to the fields specified. This may cause errors to be raised in the db layer if
        # required model fields arent in fields/fieldsets, but that's preferable to
        # ghost errors where you have a field in your Form class that isn't being
        # displayed because you forgot to add it to fields/fieldsets

        # Using `fields`.
        class BandAdmin(ModelAdmin):
            fields = ['name']

        ma = BandAdmin(Band, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields), ['name'])
        self.assertEqual(list(ma.get_form(request, self.band).base_fields),
            ['name'])

        # Using `fieldsets`.
        class BandAdmin(ModelAdmin):
            fieldsets = [(None, {'fields': ['name']})]

        ma = BandAdmin(Band, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields), ['name'])
        self.assertEqual(list(ma.get_form(request, self.band).base_fields),
            ['name'])

        # Using `exclude`.
        class BandAdmin(ModelAdmin):
            exclude = ['bio']

        ma = BandAdmin(Band, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields),
            ['name', 'sign_date'])

        # You can also pass a tuple to `exclude`.
        class BandAdmin(ModelAdmin):
            exclude = ('bio',)

        ma = BandAdmin(Band, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields),
            ['name', 'sign_date'])

        # Using `fields` and `exclude`.
        class BandAdmin(ModelAdmin):
            fields = ['name', 'bio']
            exclude = ['bio']

        ma = BandAdmin(Band, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields),
            ['name'])

    def test_custom_form_meta_exclude_with_readonly(self):
        """
        Ensure that the custom ModelForm's `Meta.exclude` is respected when
        used in conjunction with `ModelAdmin.readonly_fields` and when no
        `ModelAdmin.exclude` is defined.
        Refs #14496.
        """
        # First, with `ModelAdmin` -----------------------

        class AdminBandForm(forms.ModelForm):

            class Meta:
                model = Band
                exclude = ['bio']

        class BandAdmin(ModelAdmin):
            readonly_fields = ['name']
            form = AdminBandForm

        ma = BandAdmin(Band, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields),
            ['sign_date'])

        # Then, with `InlineModelAdmin`  -----------------

        class AdminConcertForm(forms.ModelForm):

            class Meta:
                model = Concert
                exclude = ['day']

        class ConcertInline(TabularInline):
            readonly_fields = ['transport']
            form = AdminConcertForm
            fk_name = 'main_band'
            model = Concert

        class BandAdmin(ModelAdmin):
            inlines = [
                ConcertInline
            ]

        ma = BandAdmin(Band, self.site)
        self.assertEqual(
            list(list(ma.get_formsets_with_inlines(request))[0][0]().forms[0].fields),
            ['main_band', 'opening_band', 'id', 'DELETE'])

    def test_custom_form_meta_exclude(self):
        """
        Ensure that the custom ModelForm's `Meta.exclude` is overridden if
        `ModelAdmin.exclude` or `InlineModelAdmin.exclude` are defined.
        Refs #14496.
        """
        # First, with `ModelAdmin` -----------------------

        class AdminBandForm(forms.ModelForm):

            class Meta:
                model = Band
                exclude = ['bio']

        class BandAdmin(ModelAdmin):
            exclude = ['name']
            form = AdminBandForm

        ma = BandAdmin(Band, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields),
            ['bio', 'sign_date'])

        # Then, with `InlineModelAdmin`  -----------------

        class AdminConcertForm(forms.ModelForm):

            class Meta:
                model = Concert
                exclude = ['day']

        class ConcertInline(TabularInline):
            exclude = ['transport']
            form = AdminConcertForm
            fk_name = 'main_band'
            model = Concert

        class BandAdmin(ModelAdmin):
            inlines = [
                ConcertInline
            ]

        ma = BandAdmin(Band, self.site)
        self.assertEqual(
            list(list(ma.get_formsets_with_inlines(request))[0][0]().forms[0].fields),
            ['main_band', 'opening_band', 'day', 'id', 'DELETE'])

    def test_custom_form_validation(self):
        # If we specify a form, it should use it allowing custom validation to work
        # properly. This won't, however, break any of the admin widgets or media.

        class AdminBandForm(forms.ModelForm):
            delete = forms.BooleanField()

        class BandAdmin(ModelAdmin):
            form = AdminBandForm

        ma = BandAdmin(Band, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields),
            ['name', 'bio', 'sign_date', 'delete'])

        self.assertEqual(
            type(ma.get_form(request).base_fields['sign_date'].widget),
            AdminDateWidget)

    def test_form_exclude_kwarg_override(self):
        """
        Ensure that the `exclude` kwarg passed to `ModelAdmin.get_form()`
        overrides all other declarations. Refs #8999.
        """

        class AdminBandForm(forms.ModelForm):

            class Meta:
                model = Band
                exclude = ['name']

        class BandAdmin(ModelAdmin):
            exclude = ['sign_date']
            form = AdminBandForm

            def get_form(self, request, obj=None, **kwargs):
                kwargs['exclude'] = ['bio']
                return super(BandAdmin, self).get_form(request, obj, **kwargs)

        ma = BandAdmin(Band, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields),
            ['name', 'sign_date'])

    def test_formset_exclude_kwarg_override(self):
        """
        Ensure that the `exclude` kwarg passed to `InlineModelAdmin.get_formset()`
        overrides all other declarations. Refs #8999.
        """

        class AdminConcertForm(forms.ModelForm):

            class Meta:
                model = Concert
                exclude = ['day']

        class ConcertInline(TabularInline):
            exclude = ['transport']
            form = AdminConcertForm
            fk_name = 'main_band'
            model = Concert

            def get_formset(self, request, obj=None, **kwargs):
                kwargs['exclude'] = ['opening_band']
                return super(ConcertInline, self).get_formset(request, obj, **kwargs)

        class BandAdmin(ModelAdmin):
            inlines = [
                ConcertInline
            ]

        ma = BandAdmin(Band, self.site)
        self.assertEqual(
            list(list(ma.get_formsets_with_inlines(request))[0][0]().forms[0].fields),
            ['main_band', 'day', 'transport', 'id', 'DELETE'])

    def test_queryset_override(self):
        # If we need to override the queryset of a ModelChoiceField in our custom form
        # make sure that RelatedFieldWidgetWrapper doesn't mess that up.

        band2 = Band(name='The Beatles', bio='', sign_date=date(1962, 1, 1))
        band2.save()

        class ConcertAdmin(ModelAdmin):
            pass
        ma = ConcertAdmin(Concert, self.site)
        form = ma.get_form(request)()

        self.assertHTMLEqual(str(form["main_band"]),
            '<select name="main_band" id="id_main_band">\n'
            '<option value="" selected="selected">---------</option>\n'
            '<option value="%d">The Beatles</option>\n'
            '<option value="%d">The Doors</option>\n'
            '</select>' % (band2.id, self.band.id))

        class AdminConcertForm(forms.ModelForm):
            pass

            def __init__(self, *args, **kwargs):
                super(AdminConcertForm, self).__init__(*args, **kwargs)
                self.fields["main_band"].queryset = Band.objects.filter(name='The Doors')

        class ConcertAdmin(ModelAdmin):
            form = AdminConcertForm

        ma = ConcertAdmin(Concert, self.site)
        form = ma.get_form(request)()

        self.assertHTMLEqual(str(form["main_band"]),
            '<select name="main_band" id="id_main_band">\n'
            '<option value="" selected="selected">---------</option>\n'
            '<option value="%d">The Doors</option>\n'
            '</select>' % self.band.id)

    def test_regression_for_ticket_15820(self):
        """
        Ensure that `obj` is passed from `InlineModelAdmin.get_fieldsets()` to
        `InlineModelAdmin.get_formset()`.
        """
        class CustomConcertForm(forms.ModelForm):

            class Meta:
                model = Concert
                fields = ['day']

        class ConcertInline(TabularInline):
            model = Concert
            fk_name = 'main_band'

            def get_formset(self, request, obj=None, **kwargs):
                if obj:
                    kwargs['form'] = CustomConcertForm
                return super(ConcertInline, self).get_formset(request, obj, **kwargs)

        class BandAdmin(ModelAdmin):
            inlines = [
                ConcertInline
            ]

        Concert.objects.create(main_band=self.band, opening_band=self.band, day=1)
        ma = BandAdmin(Band, self.site)
        inline_instances = ma.get_inline_instances(request)
        fieldsets = list(inline_instances[0].get_fieldsets(request))
        self.assertEqual(fieldsets[0][1]['fields'], ['main_band', 'opening_band', 'day', 'transport'])
        fieldsets = list(inline_instances[0].get_fieldsets(request, inline_instances[0].model))
        self.assertEqual(fieldsets[0][1]['fields'], ['day'])

    # radio_fields behavior ###########################################

    def test_default_foreign_key_widget(self):
        # First, without any radio_fields specified, the widgets for ForeignKey
        # and fields with choices specified ought to be a basic Select widget.
        # ForeignKey widgets in the admin are wrapped with RelatedFieldWidgetWrapper so
        # they need to be handled properly when type checking. For Select fields, all of
        # the choices lists have a first entry of dashes.

        cma = ModelAdmin(Concert, self.site)
        cmafa = cma.get_form(request)

        self.assertEqual(type(cmafa.base_fields['main_band'].widget.widget),
            Select)
        self.assertEqual(
            list(cmafa.base_fields['main_band'].widget.choices),
            [('', '---------'), (self.band.id, 'The Doors')])

        self.assertEqual(
            type(cmafa.base_fields['opening_band'].widget.widget), Select)
        self.assertEqual(
            list(cmafa.base_fields['opening_band'].widget.choices),
            [('', '---------'), (self.band.id, 'The Doors')])

        self.assertEqual(type(cmafa.base_fields['day'].widget), Select)
        self.assertEqual(list(cmafa.base_fields['day'].widget.choices),
            [('', '---------'), (1, 'Fri'), (2, 'Sat')])

        self.assertEqual(type(cmafa.base_fields['transport'].widget),
            Select)
        self.assertEqual(
            list(cmafa.base_fields['transport'].widget.choices),
            [('', '---------'), (1, 'Plane'), (2, 'Train'), (3, 'Bus')])

    def test_foreign_key_as_radio_field(self):
        # Now specify all the fields as radio_fields.  Widgets should now be
        # RadioSelect, and the choices list should have a first entry of 'None' if
        # blank=True for the model field.  Finally, the widget should have the
        # 'radiolist' attr, and 'inline' as well if the field is specified HORIZONTAL.

        class ConcertAdmin(ModelAdmin):
            radio_fields = {
                'main_band': HORIZONTAL,
                'opening_band': VERTICAL,
                'day': VERTICAL,
                'transport': HORIZONTAL,
            }

        cma = ConcertAdmin(Concert, self.site)
        cmafa = cma.get_form(request)

        self.assertEqual(type(cmafa.base_fields['main_band'].widget.widget),
            AdminRadioSelect)
        self.assertEqual(cmafa.base_fields['main_band'].widget.attrs,
            {'class': 'radiolist inline'})
        self.assertEqual(list(cmafa.base_fields['main_band'].widget.choices),
            [(self.band.id, 'The Doors')])

        self.assertEqual(
            type(cmafa.base_fields['opening_band'].widget.widget),
            AdminRadioSelect)
        self.assertEqual(cmafa.base_fields['opening_band'].widget.attrs,
            {'class': 'radiolist'})
        self.assertEqual(
            list(cmafa.base_fields['opening_band'].widget.choices),
            [('', 'None'), (self.band.id, 'The Doors')])

        self.assertEqual(type(cmafa.base_fields['day'].widget),
            AdminRadioSelect)
        self.assertEqual(cmafa.base_fields['day'].widget.attrs,
            {'class': 'radiolist'})
        self.assertEqual(list(cmafa.base_fields['day'].widget.choices),
            [(1, 'Fri'), (2, 'Sat')])

        self.assertEqual(type(cmafa.base_fields['transport'].widget),
            AdminRadioSelect)
        self.assertEqual(cmafa.base_fields['transport'].widget.attrs,
            {'class': 'radiolist inline'})
        self.assertEqual(list(cmafa.base_fields['transport'].widget.choices),
            [('', 'None'), (1, 'Plane'), (2, 'Train'), (3, 'Bus')])

        class AdminConcertForm(forms.ModelForm):
            class Meta:
                model = Concert
                exclude = ('transport',)

        class ConcertAdmin(ModelAdmin):
            form = AdminConcertForm

        ma = ConcertAdmin(Concert, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields),
            ['main_band', 'opening_band', 'day'])

        class AdminConcertForm(forms.ModelForm):
            extra = forms.CharField()

            class Meta:
                model = Concert
                fields = ['extra', 'transport']

        class ConcertAdmin(ModelAdmin):
            form = AdminConcertForm

        ma = ConcertAdmin(Concert, self.site)
        self.assertEqual(list(ma.get_form(request).base_fields),
            ['extra', 'transport'])

        class ConcertInline(TabularInline):
            form = AdminConcertForm
            model = Concert
            fk_name = 'main_band'
            can_delete = True

        class BandAdmin(ModelAdmin):
            inlines = [
                ConcertInline
            ]

        ma = BandAdmin(Band, self.site)
        self.assertEqual(
            list(list(ma.get_formsets_with_inlines(request))[0][0]().forms[0].fields),
            ['extra', 'transport', 'id', 'DELETE', 'main_band'])


class CheckTestCase(TestCase):

    def assertIsInvalid(self, model_admin, model, msg,
            id=None, hint=None, invalid_obj=None):
        invalid_obj = invalid_obj or model_admin
        errors = model_admin.check(model=model)
        expected = [
            Error(
                msg,
                hint=hint,
                obj=invalid_obj,
                id=id,
            )
        ]
        self.assertEqual(errors, expected)

    def assertIsValid(self, model_admin, model):
        errors = model_admin.check(model=model)
        expected = []
        self.assertEqual(errors, expected)


class RawIdCheckTests(CheckTestCase):

    def test_not_iterable(self):
        class ValidationTestModelAdmin(ModelAdmin):
            raw_id_fields = 10

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"raw_id_fields" must be a list or tuple.',
            'admin.E001')

    def test_missing_field(self):
        class ValidationTestModelAdmin(ModelAdmin):
            raw_id_fields = ('non_existent_field',)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"raw_id_fields[0]" refers to field "non_existent_field", '
             'which is missing from model modeladmin.ValidationTestModel.'),
            'admin.E002')

    def test_invalid_field_type(self):
        class ValidationTestModelAdmin(ModelAdmin):
            raw_id_fields = ('name',)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"raw_id_fields[0]" must be a ForeignKey or ManyToManyField.',
            'admin.E003')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            raw_id_fields = ('users',)

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class FieldsetsCheckTests(CheckTestCase):

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            fieldsets = (("General", {"fields": ("name",)}),)

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)

    def test_not_iterable(self):

        class ValidationTestModelAdmin(ModelAdmin):
            fieldsets = 10

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"fieldsets" must be a list or tuple.',
            'admin.E007')

    def test_non_iterable_item(self):
        class ValidationTestModelAdmin(ModelAdmin):
            fieldsets = ({},)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"fieldsets[0]" must be a list or tuple.',
            'admin.E008')

    def test_item_not_a_pair(self):
        class ValidationTestModelAdmin(ModelAdmin):
            fieldsets = ((),)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"fieldsets[0]" must be a pair.',
            'admin.E009')

    def test_second_element_of_item_not_a_dict(self):
        class ValidationTestModelAdmin(ModelAdmin):
            fieldsets = (("General", ()),)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"fieldsets[0][1]" must be a dictionary.',
            'admin.E010')

    def test_missing_fields_key(self):
        class ValidationTestModelAdmin(ModelAdmin):
            fieldsets = (("General", {}),)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"fieldsets[0][1]" must contain "fields" key.',
            'admin.E011')

        class ValidationTestModelAdmin(ModelAdmin):
            fieldsets = (("General", {"fields": ("name",)}),)

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)

    def test_specified_both_fields_and_fieldsets(self):
        class ValidationTestModelAdmin(ModelAdmin):
            fieldsets = (("General", {"fields": ("name",)}),)
            fields = ["name"]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            'Both "fieldsets" and "fields" are specified.',
            'admin.E005')

    def test_duplicate_fields(self):
        class ValidationTestModelAdmin(ModelAdmin):
            fieldsets = [(None, {'fields': ['name', 'name']})]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            'There are duplicate field(s) in "fieldsets[0][1]".',
            'admin.E012')

    def test_fieldsets_with_custom_form_validation(self):
        class BandAdmin(ModelAdmin):
            fieldsets = (
                ('Band', {
                    'fields': ('name',)
                }),
            )

        self.assertIsValid(BandAdmin, Band)


class FieldsCheckTests(CheckTestCase):

    def test_duplicate_fields_in_fields(self):
        class ValidationTestModelAdmin(ModelAdmin):
            fields = ["name", "name"]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            'There are duplicate field(s) in "fields".',
            'admin.E006')

    def test_inline(self):
        class ValidationTestInline(TabularInline):
            model = ValidationTestInlineModel
            fields = 10

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"fields" must be a list or tuple.',
            'admin.E004',
            invalid_obj=ValidationTestInline)


class FormCheckTests(CheckTestCase):

    def test_invalid_type(self):
        class FakeForm(object):
            pass

        class ValidationTestModelAdmin(ModelAdmin):
            form = FakeForm

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"form" must inherit from BaseModelForm.',
            'admin.E016')

    def test_fieldsets_with_custom_form_validation(self):

        class BandAdmin(ModelAdmin):
            fieldsets = (
                ('Band', {
                    'fields': ('name',)
                }),
            )

        self.assertIsValid(BandAdmin, Band)

    def test_valid_case(self):
        class AdminBandForm(forms.ModelForm):
            delete = forms.BooleanField()

        class BandAdmin(ModelAdmin):
            form = AdminBandForm

            fieldsets = (
                ('Band', {
                    'fields': ('name', 'bio', 'sign_date', 'delete')
                }),
            )

        self.assertIsValid(BandAdmin, Band)


class FilterVerticalCheckTests(CheckTestCase):

    def test_not_iterable(self):
        class ValidationTestModelAdmin(ModelAdmin):
            filter_vertical = 10

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"filter_vertical" must be a list or tuple.',
            'admin.E017')

    def test_missing_field(self):
        class ValidationTestModelAdmin(ModelAdmin):
            filter_vertical = ("non_existent_field",)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"filter_vertical[0]" refers to field "non_existent_field", '
             'which is missing from model modeladmin.ValidationTestModel.'),
            'admin.E019')

    def test_invalid_field_type(self):
        class ValidationTestModelAdmin(ModelAdmin):
            filter_vertical = ("name",)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"filter_vertical[0]" must be a ManyToManyField.',
            'admin.E020')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            filter_vertical = ("users",)

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class FilterHorizontalCheckTests(CheckTestCase):

    def test_not_iterable(self):
        class ValidationTestModelAdmin(ModelAdmin):
            filter_horizontal = 10

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"filter_horizontal" must be a list or tuple.',
            'admin.E018')

    def test_missing_field(self):
        class ValidationTestModelAdmin(ModelAdmin):
            filter_horizontal = ("non_existent_field",)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"filter_horizontal[0]" refers to field "non_existent_field", '
             'which is missing from model modeladmin.ValidationTestModel.'),
            'admin.E019')

    def test_invalid_field_type(self):
        class ValidationTestModelAdmin(ModelAdmin):
            filter_horizontal = ("name",)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"filter_horizontal[0]" must be a ManyToManyField.',
            'admin.E020')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            filter_horizontal = ("users",)

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class RadioFieldsCheckTests(CheckTestCase):

    def test_not_dictionary(self):

        class ValidationTestModelAdmin(ModelAdmin):
            radio_fields = ()

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"radio_fields" must be a dictionary.',
            'admin.E021')

    def test_missing_field(self):
        class ValidationTestModelAdmin(ModelAdmin):
            radio_fields = {"non_existent_field": VERTICAL}

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"radio_fields" refers to field "non_existent_field", '
             'which is missing from model modeladmin.ValidationTestModel.'),
            'admin.E022')

    def test_invalid_field_type(self):
        class ValidationTestModelAdmin(ModelAdmin):
            radio_fields = {"name": VERTICAL}

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"radio_fields" refers to "name", which is neither an instance '
             'of ForeignKey nor does have choices set.'),
            'admin.E023')

    def test_invalid_value(self):
        class ValidationTestModelAdmin(ModelAdmin):
            radio_fields = {"state": None}

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"radio_fields[\'state\']" is neither admin.HORIZONTAL nor admin.VERTICAL.',
            'admin.E024')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            radio_fields = {"state": VERTICAL}

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class PrepopulatedFieldsCheckTests(CheckTestCase):

    def test_not_dictionary(self):

        class ValidationTestModelAdmin(ModelAdmin):
            prepopulated_fields = ()

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"prepopulated_fields" must be a dictionary.',
            'admin.E026')

    def test_missing_field(self):
        class ValidationTestModelAdmin(ModelAdmin):
            prepopulated_fields = {"non_existent_field": ("slug",)}

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"prepopulated_fields" refers to field "non_existent_field", '
             'which is missing from model modeladmin.ValidationTestModel.'),
            'admin.E027')

    def test_missing_field_again(self):
        class ValidationTestModelAdmin(ModelAdmin):
            prepopulated_fields = {"slug": ("non_existent_field",)}

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"prepopulated_fields[\'slug\'][0]" refers to field "non_existent_field", '
             'which is missing from model modeladmin.ValidationTestModel.'),
            'admin.E030')

    def test_invalid_field_type(self):
        class ValidationTestModelAdmin(ModelAdmin):
            prepopulated_fields = {"users": ("name",)}

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"prepopulated_fields" refers to "users", which must not be '
             'a DateTimeField, ForeignKey or ManyToManyField.'),
            'admin.E028')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            prepopulated_fields = {"slug": ("name",)}

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class ListDisplayTests(CheckTestCase):

    def test_not_iterable(self):

        class ValidationTestModelAdmin(ModelAdmin):
            list_display = 10

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_display" must be a list or tuple.',
            'admin.E107')

    def test_missing_field(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_display = ('non_existent_field',)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"list_display[0]" is neither a callable nor an attribute '
             'of "ValidationTestModelAdmin" nor found in model modeladmin.ValidationTestModel.'),
            'admin.E110')

    def test_invalid_field_type(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_display = ('users',)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_display[0]" must not be a ManyToManyField.',
            'admin.E109')

    def test_valid_case(self):
        def a_callable(obj):
            pass

        class ValidationTestModelAdmin(ModelAdmin):
            def a_method(self, obj):
                pass
            list_display = ('name', 'decade_published_in', 'a_method', a_callable)

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class ListDisplayLinksCheckTests(CheckTestCase):

    def test_not_iterable(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_display_links = 10

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_display_links" must be a list or tuple or None.',
            'admin.E111')

    def test_missing_field(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_display_links = ('non_existent_field',)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_display_links[0]" refers to "non_existent_field", which is not defined in "list_display".',
            'admin.E112')

    def test_missing_in_list_display(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_display_links = ('name',)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_display_links[0]" refers to "name", which is not defined in "list_display".',
            'admin.E112')

    def test_valid_case(self):
        def a_callable(obj):
            pass

        class ValidationTestModelAdmin(ModelAdmin):
            def a_method(self, obj):
                pass
            list_display = ('name', 'decade_published_in', 'a_method', a_callable)
            list_display_links = ('name', 'decade_published_in', 'a_method', a_callable)

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)

    def test_None_is_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_display_links = None

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class ListFilterTests(CheckTestCase):

    def test_list_filter_validation(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_filter = 10

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_filter" must be a list or tuple.',
            'admin.E113')

    def test_missing_field(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_filter = ('non_existent_field',)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_filter[0]" refers to "non_existent_field", which does not refer to a Field.',
            'admin.E117')

    def test_not_filter(self):
        class RandomClass(object):
            pass

        class ValidationTestModelAdmin(ModelAdmin):
            list_filter = (RandomClass,)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_filter[0]" must inherit from ListFilter.',
            'admin.E114')

    def test_not_filter_again(self):
        class RandomClass(object):
            pass

        class ValidationTestModelAdmin(ModelAdmin):
            list_filter = (('is_active', RandomClass),)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_filter[0][1]" must inherit from FieldListFilter.',
            'admin.E116')

    def test_not_filter_again_again(self):
        class AwesomeFilter(SimpleListFilter):
            def get_title(self):
                return 'awesomeness'

            def get_choices(self, request):
                return (('bit', 'A bit awesome'), ('very', 'Very awesome'), )

            def get_queryset(self, cl, qs):
                return qs

        class ValidationTestModelAdmin(ModelAdmin):
            list_filter = (('is_active', AwesomeFilter),)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_filter[0][1]" must inherit from FieldListFilter.',
            'admin.E116')

    def test_not_associated_with_field_name(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_filter = (BooleanFieldListFilter,)

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_filter[0]" must not inherit from FieldListFilter.',
            'admin.E115')

    def test_valid_case(self):
        class AwesomeFilter(SimpleListFilter):
            def get_title(self):
                return 'awesomeness'

            def get_choices(self, request):
                return (('bit', 'A bit awesome'), ('very', 'Very awesome'), )

            def get_queryset(self, cl, qs):
                return qs

        class ValidationTestModelAdmin(ModelAdmin):
            list_filter = ('is_active', AwesomeFilter, ('is_active', BooleanFieldListFilter), 'no')

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class ListPerPageCheckTests(CheckTestCase):

    def test_not_integer(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_per_page = 'hello'

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_per_page" must be an integer.',
            'admin.E119')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_per_page = 100

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class ListMaxShowAllCheckTests(CheckTestCase):

    def test_not_integer(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_max_show_all = 'hello'

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"list_max_show_all" must be an integer.',
            'admin.E120')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_max_show_all = 200

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class SearchFieldsCheckTests(CheckTestCase):

    def test_not_iterable(self):

        class ValidationTestModelAdmin(ModelAdmin):
            search_fields = 10

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"search_fields" must be a list or tuple.',
            'admin.E127')


class DateHierarchyCheckTests(CheckTestCase):

    def test_missing_field(self):

        class ValidationTestModelAdmin(ModelAdmin):
            date_hierarchy = 'non_existent_field'

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"date_hierarchy" refers to field "non_existent_field", which '
             'is missing from model modeladmin.ValidationTestModel.'),
            'admin.E128')

    def test_invalid_field_type(self):
        class ValidationTestModelAdmin(ModelAdmin):
            date_hierarchy = 'name'

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"date_hierarchy" must be a DateField or DateTimeField.',
            'admin.E129')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            date_hierarchy = 'pub_date'

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class OrderingCheckTests(CheckTestCase):

    def test_not_iterable(self):
        class ValidationTestModelAdmin(ModelAdmin):
            ordering = 10

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"ordering" must be a list or tuple.',
            'admin.E031')

        class ValidationTestModelAdmin(ModelAdmin):
            ordering = ('non_existent_field',)

        self.assertIsInvalid(
            ValidationTestModelAdmin,
            ValidationTestModel,
            '"ordering[0]" refers to field "non_existent_field", which is missing from model modeladmin.ValidationTestModel.',
            'admin.E033',
        )

    def test_random_marker_not_alone(self):
        class ValidationTestModelAdmin(ModelAdmin):
            ordering = ('?', 'name')

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            ('"ordering" has the random ordering marker "?", but contains '
             'other fields as well.'),
            'admin.E032',
            hint='Either remove the "?", or remove the other fields.')

    def test_valid_random_marker_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            ordering = ('?',)

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)

    def test_valid_complex_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            ordering = ('band__name',)

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            ordering = ('name',)

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class ListSelectRelatedCheckTests(CheckTestCase):

    def test_invalid_type(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_select_related = 1

        self.assertIsInvalid(ValidationTestModelAdmin, ValidationTestModel,
            '"list_select_related" must be a boolean, tuple or list.',
            'admin.E118')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            list_select_related = False

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class SaveAsCheckTests(CheckTestCase):

    def test_not_boolean(self):
        class ValidationTestModelAdmin(ModelAdmin):
            save_as = 1

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"save_as" must be a boolean.',
            'admin.E101')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            save_as = True

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class SaveOnTopCheckTests(CheckTestCase):

    def test_not_boolean(self):
        class ValidationTestModelAdmin(ModelAdmin):
            save_on_top = 1

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"save_on_top" must be a boolean.',
            'admin.E102')

    def test_valid_case(self):
        class ValidationTestModelAdmin(ModelAdmin):
            save_on_top = True

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class InlinesCheckTests(CheckTestCase):

    def test_not_iterable(self):
        class ValidationTestModelAdmin(ModelAdmin):
            inlines = 10

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"inlines" must be a list or tuple.',
            'admin.E103')

    def test_not_model_admin(self):
        class ValidationTestInline(object):
            pass

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"inlines[0]" must inherit from BaseModelAdmin.',
            'admin.E104')

    def test_missing_model_field(self):
        class ValidationTestInline(TabularInline):
            pass

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"model" is a required attribute of "inlines[0]".',
            'admin.E105')

    def test_invalid_model_type(self):
        """ Test if `model` attribute on inline model admin is a models.Model.
        """

        class SomethingBad(object):
            pass

        class ValidationTestInline(TabularInline):
            model = SomethingBad

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"inlines[0].model" must be a Model.',
            'admin.E106')

    def test_valid_case(self):
        class ValidationTestInline(TabularInline):
            model = ValidationTestInlineModel

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class FkNameCheckTests(CheckTestCase):

    def test_missing_field(self):
        class ValidationTestInline(TabularInline):
            model = ValidationTestInlineModel
            fk_name = "non_existent_field"

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            "'modeladmin.ValidationTestInlineModel' has no field named 'non_existent_field'.",
            'admin.E202',
            invalid_obj=ValidationTestInline)

    def test_valid_case(self):
        class ValidationTestInline(TabularInline):
            model = ValidationTestInlineModel
            fk_name = "parent"

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class ExtraCheckTests(CheckTestCase):

    def test_not_integer(self):
        class ValidationTestInline(TabularInline):
            model = ValidationTestInlineModel
            extra = "hello"

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"extra" must be an integer.',
            'admin.E203',
            invalid_obj=ValidationTestInline)

    def test_valid_case(self):
        class ValidationTestInline(TabularInline):
            model = ValidationTestInlineModel
            extra = 2

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class MaxNumCheckTests(CheckTestCase):

    def test_not_integer(self):
        class ValidationTestInline(TabularInline):
            model = ValidationTestInlineModel
            max_num = "hello"

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"max_num" must be an integer.',
            'admin.E204',
            invalid_obj=ValidationTestInline)

    def test_valid_case(self):
        class ValidationTestInline(TabularInline):
            model = ValidationTestInlineModel
            max_num = 2

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class FormsetCheckTests(CheckTestCase):

    def test_invalid_type(self):
        class FakeFormSet(object):
            pass

        class ValidationTestInline(TabularInline):
            model = ValidationTestInlineModel
            formset = FakeFormSet

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsInvalid(
            ValidationTestModelAdmin, ValidationTestModel,
            '"formset" must inherit from BaseModelFormSet.',
            'admin.E205',
            invalid_obj=ValidationTestInline)

    def test_valid_case(self):
        class RealModelFormSet(BaseModelFormSet):
            pass

        class ValidationTestInline(TabularInline):
            model = ValidationTestInlineModel
            formset = RealModelFormSet

        class ValidationTestModelAdmin(ModelAdmin):
            inlines = [ValidationTestInline]

        self.assertIsValid(ValidationTestModelAdmin, ValidationTestModel)


class CustomModelAdminTests(CheckTestCase):
    def test_deprecation(self):
        "Deprecated Custom Validator definitions still work with the check framework."
        with warnings.catch_warnings():
            warnings.simplefilter("ignore", category=PendingDeprecationWarning)

            class CustomValidator(ModelAdminValidator):
                def validate_me(self, model_admin, model):
                    raise ImproperlyConfigured('error!')

            class CustomModelAdmin(ModelAdmin):
                validator_class = CustomValidator

            self.assertIsInvalid(CustomModelAdmin, ValidationTestModel, 'error!')
