from django import forms
from django.contrib.admin import AdminSite
from django.test import TestCase
from django.test.utils import override_settings

from django.contrib.auth import get_user_model

from mock import Mock

from osusers.models import (
    Group,
    User,
)
from osusers.admin import (
    GroupAdmin,
    PASSWORD_MISMATCH_ERROR,
    UserAdmin,
    UserCreationForm,
)

Customer = get_user_model()


class CustomerTestCase(TestCase):
    def setUp(self):
        self.customer = Customer.objects.create_user('test')
        super(CustomerTestCase, self).setUp()


class UserCreationFormTest(CustomerTestCase):

    def test_clean_password2_same(self):
        form = UserCreationForm()
        form.cleaned_data = {
            'customer': self.customer,
            'password1': 'secret',
            'password2': 'secret'
        }
        self.assertEqual(form.clean_password2(), 'secret')

    def test_clean_password2_empty(self):
        form = UserCreationForm()
        form.cleaned_data = {}
        self.assertIsNone(form.clean_password2())

    def test_clean_password2_mismatch(self):
        form = UserCreationForm()
        form.cleaned_data = {
            'customer': self.customer,
            'password1': 'secretx',
            'password2': 'secrety'
        }
        with self.assertRaises(forms.ValidationError) as cm:
            form.clean_password2()
        self.assertEqual(cm.exception.message, PASSWORD_MISMATCH_ERROR)

    @override_settings(
        CELERY_ALWAYS_EAGER=True,
        CELERY_CACHE_BACKEND='memory',
        BROKER_BACKEND='memory'
    )
    def test_save_commit(self):
        form = UserCreationForm()
        form.cleaned_data = {
            'customer': self.customer,
            'password1': 'secret',
            'password2': 'secret'
        }
        user = form.save()
        self.assertIsNotNone(user)
        self.assertEqual(User.objects.get(pk=user.uid), user)

    def test_save_m2m_returns_none(self):
        form = UserCreationForm()
        self.assertIsNone(form.save_m2m())


class UserAdminTest(CustomerTestCase):
    def setUp(self):
        site = AdminSite()
        self.uadmin = UserAdmin(User, site)
        super(UserAdminTest, self).setUp()

    def test_get_form_without_object(self):
        form = self.uadmin.get_form(Mock(name='request'))
        self.assertEqual(
            form.Meta.fields,
            ['customer', 'password1', 'password2']
        )

    @override_settings(
        CELERY_ALWAYS_EAGER=True,
        CELERY_CACHE_BACKEND='memory',
        BROKER_BACKEND='memory'
    )
    def test_get_form_with_object(self):
        user = User.objects.create_user(customer=self.customer)
        form = self.uadmin.get_form(Mock(name='request'), user)
        self.assertEqual(
            form.Meta.fields,
            ['username', 'group', 'gecos', 'homedir', 'shell', 'customer',
             'uid']
        )

    def test_get_inline_instances_without_object(self):
        inlines = self.uadmin.get_inline_instances(Mock(name='request'))
        self.assertEqual(len(inlines), 2)

    @override_settings(
        CELERY_ALWAYS_EAGER=True,
        CELERY_CACHE_BACKEND='memory',
        BROKER_BACKEND='memory'
    )
    def test_get_inline_instances_with_object(self):
        user = User.objects.create_user(customer=self.customer)
        inlines = self.uadmin.get_inline_instances(
            Mock(name='request'), user)
        self.assertEqual(len(inlines), len(UserAdmin.inlines))
        for index in range(len(inlines)):
            self.assertIsInstance(inlines[index], UserAdmin.inlines[index])


class GroupAdminTest(TestCase):
    def setUp(self):
        site = AdminSite()
        self.gadmin = GroupAdmin(Group, site)
        super(GroupAdminTest, self).setUp()

    def test_get_inline_instances_without_object(self):
        inlines = self.gadmin.get_inline_instances(Mock(name='request'))
        self.assertEqual(inlines, [])

    @override_settings(
        CELERY_ALWAYS_EAGER=True,
        CELERY_CACHE_BACKEND='memory',
        BROKER_BACKEND='memory'
    )
    def test_get_inline_instances_with_object(self):
        group = Group.objects.create(gid=1000, groupname='test')
        inlines = self.gadmin.get_inline_instances(
            Mock(name='request'), group)
        self.assertEqual(len(inlines), len(GroupAdmin.inlines))
        for index in range(len(inlines)):
            self.assertIsInstance(inlines[index], GroupAdmin.inlines[index])