from django.test import TestCase, RequestFactory
from django.utils import timezone
from datetime import date, datetime
from decimal import Decimal
from unittest.mock import Mock
from material.models import MaterialCategory, MaterialPart, Ownership, yearsago
from material.admin import NotTooOldFilter, MaterialAdmin
from members.models import Member, MALE, FEMALE, DIVERSE


class MaterialCategoryTestCase(TestCase):
    def setUp(self):
        self.category = MaterialCategory.objects.create(name="Climbing Gear")

    def test_str(self):
        """Test string representation of MaterialCategory"""
        self.assertEqual(str(self.category), "Climbing Gear")

    def test_verbose_names(self):
        """Test verbose names are set correctly"""
        meta = MaterialCategory._meta
        self.assertTrue(hasattr(meta, 'verbose_name'))
        self.assertTrue(hasattr(meta, 'verbose_name_plural'))


class MaterialPartTestCase(TestCase):
    def setUp(self):
        self.category = MaterialCategory.objects.create(name="Ropes")
        self.material_part = MaterialPart.objects.create(
            name="Dynamic Rope 10mm",
            description="60m dynamic climbing rope",
            quantity=5,
            buy_date=date(2020, 1, 15),
            lifetime=Decimal('8')
        )
        self.material_part.material_cat.add(self.category)

        self.member = Member.objects.create(
            prename="John",
            lastname="Doe",
            birth_date=date(1990, 1, 1),
            email="john@example.com",
            gender=MALE
        )

    def test_str(self):
        """Test string representation of MaterialPart"""
        self.assertEqual(str(self.material_part), "Dynamic Rope 10mm")

    def test_quantity_real_no_ownership(self):
        """Test quantity_real when no ownership exists"""
        result = self.material_part.quantity_real()
        self.assertEqual(result, "0/5")

    def test_quantity_real_with_ownership(self):
        """Test quantity_real with ownership records"""
        Ownership.objects.create(
            material=self.material_part,
            owner=self.member,
            count=3
        )
        Ownership.objects.create(
            material=self.material_part,
            owner=self.member,
            count=1
        )
        result = self.material_part.quantity_real()
        self.assertEqual(result, "4/5")

    def test_verbose_names(self):
        """Test field verbose names"""
        # Just test that verbose names exist, since they might be translated
        field_names = ['name', 'description', 'quantity', 'buy_date', 'lifetime', 'photo', 'material_cat']

        for field_name in field_names:
            field = self.material_part._meta.get_field(field_name)
            self.assertTrue(hasattr(field, 'verbose_name'))
            self.assertIsNotNone(field.verbose_name)

    def test_admin_thumbnail_with_photo(self):
        """Test admin_thumbnail when photo exists"""
        mock_photo = Mock()
        mock_photo.url = "/media/test.jpg"
        self.material_part.photo = mock_photo
        result = self.material_part.admin_thumbnail()
        self.assertIn("/media/test.jpg", result)
        self.assertIn("<img", result)

    def test_admin_thumbnail_without_photo(self):
        """Test admin_thumbnail when no photo exists"""
        self.material_part.photo = None
        result = self.material_part.admin_thumbnail()
        self.assertIn("kein Bild", result)

    def test_ownership_overview(self):
        """Test ownership_overview method"""
        Ownership.objects.create(material=self.material_part, owner=self.member, count=2)
        result = self.material_part.ownership_overview()
        self.assertIn(str(self.member), result)
        self.assertIn("2", result)

    def test_not_too_old(self):
        """Test not_too_old method"""
        # Set a buy_date that makes the material old
        old_date = date(2000, 1, 1)
        self.material_part.buy_date = old_date
        self.material_part.lifetime = Decimal('5')
        result = self.material_part.not_too_old()
        self.assertFalse(result)


class OwnershipTestCase(TestCase):
    def setUp(self):
        self.category = MaterialCategory.objects.create(name="Hardware")
        self.material_part = MaterialPart.objects.create(
            name="Carabiner Set",
            description="Lightweight aluminum carabiners",
            quantity=10,
            buy_date=date(2021, 6, 1),
            lifetime=Decimal('10')
        )

        self.member = Member.objects.create(
            prename="Alice",
            lastname="Smith",
            birth_date=date(1985, 3, 15),
            email="alice@example.com",
            gender=FEMALE
        )

        self.ownership = Ownership.objects.create(
            material=self.material_part,
            owner=self.member,
            count=6
        )

    def test_ownership_creation(self):
        """Test ownership record creation"""
        self.assertEqual(self.ownership.material, self.material_part)
        self.assertEqual(self.ownership.owner, self.member)
        self.assertEqual(self.ownership.count, 6)

    def test_material_part_relationship(self):
        """Test relationship between MaterialPart and Ownership"""
        ownerships = Ownership.objects.filter(material=self.material_part)
        self.assertEqual(ownerships.count(), 1)
        self.assertEqual(ownerships.first(), self.ownership)

    def test_str(self):
        """Test string representation of Ownership"""
        result = str(self.ownership)
        self.assertEqual(result, str(self.member))


class UtilityFunctionTestCase(TestCase):
    def test_yearsago_with_from_date(self):
        """Test yearsago function with explicit from_date"""
        test_date = timezone.make_aware(datetime(2020, 5, 15, 12, 0, 0))
        result = yearsago(5, from_date=test_date)
        expected = timezone.make_aware(datetime(2015, 5, 15, 12, 0, 0))
        self.assertEqual(result, expected)

    def test_yearsago_default_from_date(self):
        """Test yearsago function with default from_date (None)"""
        # This will use timezone.now() internally
        result = yearsago(1)
        self.assertIsNotNone(result)
        self.assertLess(result, timezone.now())

    def test_yearsago_leap_year_edge_case(self):
        """Test yearsago function with leap year edge case (Feb 29)"""
        # Feb 29, 2020 (leap year) minus 1 year should become Feb 28, 2019
        leap_date = timezone.make_aware(datetime(2020, 2, 29, 12, 0, 0))
        result = yearsago(1, from_date=leap_date)
        expected = timezone.make_aware(datetime(2019, 2, 28, 12, 0, 0))
        self.assertEqual(result, expected)


class NotTooOldFilterTestCase(TestCase):
    def setUp(self):
        self.factory = RequestFactory()
        self.filter = NotTooOldFilter(None, {}, MaterialPart, MaterialAdmin)

        # Create test data
        self.member = Member.objects.create(
            prename="Test", lastname="User", birth_date=date(1990, 1, 1),
            email="test@example.com", gender=MALE
        )

        # Create old material (should be too old)
        self.old_material = MaterialPart.objects.create(
            name="Old Material",
            description="Old material",
            quantity=1,
            buy_date=date(2000, 1, 1),  # Very old
            lifetime=Decimal('5')
        )

        # Create new material (should not be too old)
        self.new_material = MaterialPart.objects.create(
            name="New Material",
            description="New material",
            quantity=1,
            buy_date=date.today(),  # Today
            lifetime=Decimal('10')
        )

    def test_not_too_old_filter_lookups(self):
        """Test NotTooOldFilter lookups method"""
        request = self.factory.get('/')
        lookups = self.filter.lookups(request, None)
        self.assertEqual(len(lookups), 2)
        self.assertEqual(lookups[0][0], 'too_old')
        self.assertEqual(lookups[1][0], 'not_too_old')

    def test_not_too_old_filter_queryset_too_old(self):
        """Test NotTooOldFilter queryset method with 'too_old' value"""
        request = self.factory.get('/?age=too_old')
        self.filter.used_parameters = {'age': 'too_old'}

        queryset = MaterialPart.objects.all()
        filtered = self.filter.queryset(request, queryset)

        # Should return materials that are not too old (i.e., new materials)
        self.assertIn(self.new_material, filtered)
        self.assertNotIn(self.old_material, filtered)

    def test_not_too_old_filter_queryset_not_too_old(self):
        """Test NotTooOldFilter queryset method with 'not_too_old' value"""
        request = self.factory.get('/?age=not_too_old')
        self.filter.used_parameters = {'age': 'not_too_old'}

        queryset = MaterialPart.objects.all()
        filtered = self.filter.queryset(request, queryset)

        # Should return materials that are too old
        self.assertIn(self.old_material, filtered)
        self.assertNotIn(self.new_material, filtered)