from django.contrib.auth import get_user_model
from django.contrib.auth.models import Permission
from django.test import TestCase

from members.models import Member

User = get_user_model()


class MembersTestCase(TestCase):
    def setUp(self):
        self.user_a = User.objects.create(username="user_a", first_name="User", last_name="A", email="user_a@test.com")

    def testMemberName(self):
        self.assertEqual(str(self.user_a.member), "User A")

    def testMemberCreation(self):
        self.assertTrue(hasattr(self.user_a, "member"))

    def testMemberManager(self):
        self.assertFalse(self.user_a.has_perm("members.member_manager"))
        self.assertFalse(self.user_a.has_perm("members.add_member"))
        self.assertFalse(self.user_a.is_superuser)

        member_manager_permission = Permission.objects.get(codename="member_manager")

        self.user_a.user_permissions.add(member_manager_permission)
        self.user_a = User.objects.get(pk=self.user_a.pk)

        self.assertTrue(self.user_a.has_perm("members.member_manager"))
        self.assertTrue(self.user_a.has_perm("members.add_member"))
        self.assertFalse(self.user_a.is_superuser)


class MemberCreateTest(TestCase):
    def test_create_new_member(self):
        member = Member.create(first_name="Alice", last_name="Smith", email="alice@test.com")
        self.assertIsNotNone(member.pk)
        self.assertEqual(member.user.first_name, "Alice")
        self.assertEqual(member.user.last_name, "Smith")
        self.assertEqual(member.user.email, "alice@test.com")

    def test_create_sets_initial_password_note(self):
        member = Member.create(first_name="Alice", last_name="Smith", email="alice@test.com")
        self.assertIn("Initial password:", member.notes)

    def test_create_with_explicit_password(self):
        member = Member.create(first_name="Alice", last_name="Smith", email="alice@test.com", password="secret123")
        self.assertTrue(member.user.check_password("secret123"))
        self.assertIsNone(member.notes)

    def test_create_existing_user_reuses_member(self):
        existing_user = User.objects.create(username="bob@test.com", email="bob@test.com", first_name="Bob", last_name="Old")
        original_member_pk = existing_user.member.pk

        member = Member.create(first_name="Bob", last_name="New", email="bob@test.com")
        self.assertEqual(member.pk, original_member_pk)
        self.assertEqual(member.user.last_name, "New")

    def test_create_update_existing_member(self):
        existing_member = Member.create(first_name="Carol", last_name="Old", email="carol@test.com")
        updated_member = Member.create(first_name="Carol", last_name="Updated", email="carol@test.com", member=existing_member)

        self.assertEqual(updated_member.pk, existing_member.pk)
        self.assertEqual(updated_member.user.last_name, "Updated")

    def test_create_update_existing_member_with_password(self):
        existing_member = Member.create(first_name="Dave", last_name="D", email="dave@test.com")
        Member.create(first_name="Dave", last_name="D", email="dave@test.com", password="newpass", member=existing_member)
        existing_member.user.refresh_from_db()
        self.assertTrue(existing_member.user.check_password("newpass"))

    def test_create_reactivates_inactive_user(self):
        member = Member.create(first_name="Eve", last_name="E", email="eve@test.com")
        member.user.is_active = False
        member.user.save()

        reactivated = Member.create(first_name="Eve", last_name="E", email="eve@test.com", member=member)
        self.assertTrue(reactivated.user.is_active)

    def test_create_member_is_active_by_default(self):
        member = Member.create(first_name="Frank", last_name="F", email="frank@test.com")
        self.assertTrue(member.user.is_active)


class MemberManagerTest(TestCase):
    def test_queryset_select_related(self):
        User.objects.create(username="user_mgr", first_name="Mgr", last_name="Test", email="mgr@test.com")
        # select_related means no extra query is needed to access member.user
        with self.assertNumQueries(1):
            members = list(Member.objects.all())
            _ = [m.user.get_full_name() for m in members]