from collections.abc import Generator

from xsdata.codegen.handlers import VacuumInnerClasses
from xsdata.models.enums import DataType
from xsdata.utils.testing import (
    AttrFactory,
    AttrTypeFactory,
    ClassFactory,
    ExtensionFactory,
    FactoryTestCase,
)


class VacuumInnerClassesTests(FactoryTestCase):
    def setUp(self) -> None:
        super().setUp()
        self.processor = VacuumInnerClasses()

    def test_remove_duplicate_inners(self) -> None:
        target = ClassFactory.elements(3)

        inner_1 = ClassFactory.elements(2)
        inner_2 = inner_1.clone()

        target.inner.extend([inner_1, inner_2])

        target.attrs[1].types[0].qname = inner_1.qname
        target.attrs[1].types[0].forward = True
        target.attrs[1].types[0].reference = 4

        target.attrs[2].types[0].qname = inner_2.qname
        target.attrs[2].types[0].forward = True
        target.attrs[2].types[0].circular = True
        target.attrs[2].types[0].reference = 5

        self.processor.process(target)
        self.assertEqual(1, len(target.inner))

    def test_remove_inner(self) -> None:
        target = ClassFactory.elements(3)

        inner_1 = ClassFactory.elements(2)
        inner_2 = ClassFactory.create(extensions=ExtensionFactory.list(2))

        inner_3 = ClassFactory.create()
        inner_4 = ClassFactory.create(
            extensions=[ExtensionFactory.reference("foo", reference=15)]
        )

        target.inner.extend([inner_1, inner_2, inner_3, inner_4])

        target.attrs[1].types[0].qname = inner_3.qname
        target.attrs[1].types[0].forward = True
        target.attrs[1].types[0].reference = 4

        target.attrs[2].types[0].qname = inner_4.qname
        target.attrs[2].types[0].forward = True
        target.attrs[2].types[0].circular = True
        target.attrs[2].types[0].reference = 5

        self.processor.process(target)

        self.assertEqual(2, len(target.inner))

        # Not bare: has attrs
        self.assertIn(inner_1, target.inner)
        # Not bare: has more than one extension
        self.assertIn(inner_2, target.inner)

        self.assertEqual(str(DataType.ANY_SIMPLE_TYPE), target.attrs[1].types[0].qname)
        self.assertEqual(0, target.attrs[1].types[0].reference)
        self.assertFalse(target.attrs[1].types[0].forward)
        self.assertFalse(target.attrs[1].types[0].circular)
        self.assertTrue(target.attrs[1].types[0].native)

        self.assertEqual(
            inner_4.extensions[0].type.qname, target.attrs[2].types[0].qname
        )
        self.assertEqual(
            inner_4.extensions[0].type.reference, target.attrs[2].types[0].reference
        )
        self.assertFalse(target.attrs[2].types[0].forward)
        self.assertFalse(target.attrs[2].types[0].circular)
        self.assertFalse(target.attrs[2].types[0].native)

    def test_rename_inner(self) -> None:
        outer = ClassFactory.create(qname="{xsdata}foo")
        inner = ClassFactory.elements(1, qname="{xsdata}foo")
        outer.attrs.append(AttrFactory.reference(inner.qname, forward=True))
        outer.inner.append(inner)

        self.assertEqual("{xsdata}foo", outer.attrs[0].types[0].qname)
        self.assertEqual("{xsdata}foo", outer.inner[0].qname)

        self.processor.process(outer)

        self.assertEqual("{xsdata}foo_Inner", outer.attrs[0].types[0].qname)
        self.assertEqual("{xsdata}foo_Inner", outer.inner[0].qname)

    def test_find_attr_types_with_attr_choices(self) -> None:
        choices = [
            AttrFactory.create(
                types=[
                    AttrTypeFactory.create("bar", forward=True),
                    AttrTypeFactory.create("foo", forward=True),
                ]
            ),
            AttrFactory.reference("foo"),
            AttrFactory.reference("foo", forward=True),
            AttrFactory.reference("bar", forward=True),
        ]
        choice = AttrFactory.create(
            name="attr_B_Or_attr_C",
            tag="Choice",
            index=0,
            types=[AttrTypeFactory.native(DataType.ANY_TYPE)],
            choices=choices,
        )
        target = ClassFactory.create()
        target.attrs.append(choice)

        result = self.processor.find_attr_types(target, "foo")
        self.assertIsInstance(result, Generator)

        self.assertEqual(choices[0].types[1], next(result))
        self.assertEqual(choices[2].types[0], next(result))
        self.assertIsNone(next(result, None))

        result = self.processor.find_attr_types(target, "bar")
        self.assertEqual(choices[0].types[0], next(result))
        self.assertEqual(choices[3].types[0], next(result))
        self.assertIsNone(next(result, None))
