"""Tests for core permissions"""

from apps.core.permissions import (
    IsAdmin,
    IsAdminOrReadOnly,
    IsOwner,
    IsOwnerOrAdmin,
    IsOwnerOrReadOnly,
    IsSuperuser,
    IsVerified,
)
from django.contrib.auth import get_user_model
from django.test import RequestFactory, TestCase
from rest_framework.views import APIView

from tests.apps.user.factories import UserFactory

User = get_user_model()


class MockObject:
    """Mock object for testing ownership"""

    def __init__(self, user=None, owner=None):
        self.user = user
        self.owner = owner


class IsOwnerTest(TestCase):
    """Tests for IsOwner permission"""

    def setUp(self):
        self.factory = RequestFactory()
        self.permission = IsOwner()
        self.user = UserFactory.create_user()
        self.other_user = UserFactory.create_user()

    def test_owner_has_permission(self):
        """Test owner has permission to object"""
        request = self.factory.get("/")
        request.user = self.user
        obj = MockObject(user=self.user)

        result = self.permission.has_object_permission(request, APIView(), obj)
        self.assertTrue(result)

    def test_non_owner_denied(self):
        """Test non-owner is denied"""
        request = self.factory.get("/")
        request.user = self.other_user
        obj = MockObject(user=self.user)

        result = self.permission.has_object_permission(request, APIView(), obj)
        self.assertFalse(result)

    def test_owner_field_fallback(self):
        """Test fallback to 'owner' field"""
        request = self.factory.get("/")
        request.user = self.user
        obj = MockObject(owner=self.user)

        result = self.permission.has_object_permission(request, APIView(), obj)
        self.assertTrue(result)


class IsOwnerOrReadOnlyTest(TestCase):
    """Tests for IsOwnerOrReadOnly permission"""

    def setUp(self):
        self.factory = RequestFactory()
        self.permission = IsOwnerOrReadOnly()
        self.user = UserFactory.create_user()
        self.other_user = UserFactory.create_user()

    def test_safe_methods_allowed_for_all(self):
        """Test GET/HEAD/OPTIONS allowed for non-owners"""
        for method in ["get", "head", "options"]:
            request = getattr(self.factory, method)("/")
            request.user = self.other_user
            obj = MockObject(user=self.user)

            result = self.permission.has_object_permission(request, APIView(), obj)
            self.assertTrue(result, f"{method.upper()} should be allowed")

    def test_unsafe_methods_denied_for_non_owner(self):
        """Test POST/PUT/PATCH/DELETE denied for non-owners"""
        for method in ["post", "put", "patch", "delete"]:
            request = getattr(self.factory, method)("/")
            request.user = self.other_user
            obj = MockObject(user=self.user)

            result = self.permission.has_object_permission(request, APIView(), obj)
            self.assertFalse(result, f"{method.upper()} should be denied")

    def test_unsafe_methods_allowed_for_owner(self):
        """Test unsafe methods allowed for owner"""
        request = self.factory.put("/")
        request.user = self.user
        obj = MockObject(user=self.user)

        result = self.permission.has_object_permission(request, APIView(), obj)
        self.assertTrue(result)


class IsAdminOrReadOnlyTest(TestCase):
    """Tests for IsAdminOrReadOnly permission"""

    def setUp(self):
        self.factory = RequestFactory()
        self.permission = IsAdminOrReadOnly()
        self.user = UserFactory.create_user()
        self.admin = UserFactory.create_user(is_staff=True)

    def test_safe_methods_allowed_for_all(self):
        """Test GET allowed for non-admins"""
        request = self.factory.get("/")
        request.user = self.user

        result = self.permission.has_permission(request, APIView())
        self.assertTrue(result)

    def test_unsafe_methods_denied_for_non_admin(self):
        """Test POST denied for non-admins"""
        request = self.factory.post("/")
        request.user = self.user

        result = self.permission.has_permission(request, APIView())
        self.assertFalse(result)

    def test_unsafe_methods_allowed_for_admin(self):
        """Test POST allowed for admins"""
        request = self.factory.post("/")
        request.user = self.admin

        result = self.permission.has_permission(request, APIView())
        self.assertTrue(result)


class IsAdminTest(TestCase):
    """Tests for IsAdmin permission"""

    def setUp(self):
        self.factory = RequestFactory()
        self.permission = IsAdmin()
        self.user = UserFactory.create_user()
        self.admin = UserFactory.create_user(is_staff=True)

    def test_admin_has_permission(self):
        """Test admin has permission"""
        request = self.factory.get("/")
        request.user = self.admin

        result = self.permission.has_permission(request, APIView())
        self.assertTrue(result)

    def test_non_admin_denied(self):
        """Test non-admin is denied"""
        request = self.factory.get("/")
        request.user = self.user

        result = self.permission.has_permission(request, APIView())
        self.assertFalse(result)


class IsSuperuserTest(TestCase):
    """Tests for IsSuperuser permission"""

    def setUp(self):
        self.factory = RequestFactory()
        self.permission = IsSuperuser()
        self.user = UserFactory.create_user()
        self.superuser = UserFactory.create_superuser()

    def test_superuser_has_permission(self):
        """Test superuser has permission"""
        request = self.factory.get("/")
        request.user = self.superuser

        result = self.permission.has_permission(request, APIView())
        self.assertTrue(result)

    def test_non_superuser_denied(self):
        """Test non-superuser is denied"""
        request = self.factory.get("/")
        request.user = self.user

        result = self.permission.has_permission(request, APIView())
        self.assertFalse(result)


class IsVerifiedTest(TestCase):
    """Tests for IsVerified permission"""

    def setUp(self):
        self.factory = RequestFactory()
        self.permission = IsVerified()
        self.user = UserFactory.create_user(is_verified=False)
        self.verified_user = UserFactory.create_user(is_verified=True)

    def test_verified_user_has_permission(self):
        """Test verified user has permission"""
        request = self.factory.get("/")
        request.user = self.verified_user

        result = self.permission.has_permission(request, APIView())
        self.assertTrue(result)

    def test_unverified_user_denied(self):
        """Test unverified user is denied"""
        request = self.factory.get("/")
        request.user = self.user

        result = self.permission.has_permission(request, APIView())
        self.assertFalse(result)


class IsOwnerOrAdminTest(TestCase):
    """Tests for IsOwnerOrAdmin permission"""

    def setUp(self):
        self.factory = RequestFactory()
        self.permission = IsOwnerOrAdmin()
        self.user = UserFactory.create_user()
        self.other_user = UserFactory.create_user()
        self.admin = UserFactory.create_user(is_staff=True)

    def test_owner_has_permission(self):
        """Test owner has permission"""
        request = self.factory.get("/")
        request.user = self.user
        obj = MockObject(user=self.user)

        result = self.permission.has_object_permission(request, APIView(), obj)
        self.assertTrue(result)

    def test_admin_has_permission(self):
        """Test admin has permission to any object"""
        request = self.factory.get("/")
        request.user = self.admin
        obj = MockObject(user=self.user)

        result = self.permission.has_object_permission(request, APIView(), obj)
        self.assertTrue(result)

    def test_non_owner_non_admin_denied(self):
        """Test non-owner non-admin is denied"""
        request = self.factory.get("/")
        request.user = self.other_user
        obj = MockObject(user=self.user)

        result = self.permission.has_object_permission(request, APIView(), obj)
        self.assertFalse(result)