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# |_|    |___/                          |___/                                                                          #
# ==================================================================================================================== #
# Authors:                                                                                                             #
#   Patrick Lehmann                                                                                                    #
#                                                                                                                      #
# License:                                                                                                             #
# ==================================================================================================================== #
# Copyright 2017-2026 Patrick Lehmann - Bötzingen, Germany                                                             #
#                                                                                                                      #
# Licensed under the Apache License, Version 2.0 (the "License");                                                      #
# you may not use this file except in compliance with the License.                                                     #
# You may obtain a copy of the License at                                                                              #
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#   http://www.apache.org/licenses/LICENSE-2.0                                                                         #
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# distributed under the License is distributed on an "AS IS" BASIS,                                                    #
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# SPDX-License-Identifier: Apache-2.0                                                                                  #
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"""
Unit tests for class :class:`pyTooling.MetaClasses.ExtendedType`.

This test suite tests decorators:

* :func:`@abstractmethod <pyTooling.MetaClasses.abstractmethod>`
* :func:`@mustoverride <pyTooling.MetaClasses.mustoverride>`
"""
from unittest              import TestCase

from pyTooling.Decorators  import notimplemented
from pyTooling.MetaClasses import ExtendedType, abstractmethod, mustoverride, AbstractClassError


if __name__ == "__main__":  # pragma: no cover
	print("ERROR: you called a testcase declaration file as an executable module.")
	print("Use: 'python -m unittest <testcase module>'")
	exit(1)


class AbstractMethod(TestCase):
	def test_AbstractBase(self) -> None:
		class AbstractBase(metaclass=ExtendedType):
			_data: int

			def __init__(self, data: int) -> None:
				self._data = data

			@abstractmethod
			def AbstractMethod(self) -> bool:
				return False

		with self.assertRaises(AbstractClassError) as ExceptionCapture:
			AbstractBase(1)

		self.assertIn("AbstractBase", str(ExceptionCapture.exception))
		self.assertIn("AbstractMethod", str(ExceptionCapture.exception))

	def test_AbstractClass(self) -> None:
		class AbstractBase(metaclass=ExtendedType):
			_data: int

			def __init__(self, data: int) -> None:
				self._data = data

			@abstractmethod
			def AbstractMethod(self) -> bool:
				return False

		class AbstractClass(AbstractBase):
			pass

		with self.assertRaises(AbstractClassError) as ExceptionCapture:
			AbstractClass(2)

		self.assertIn("AbstractClass", str(ExceptionCapture.exception))
		self.assertIn("AbstractMethod", str(ExceptionCapture.exception))

	def test_DerivedAbstractBase(self) -> None:
		class AbstractBase(metaclass=ExtendedType):
			_data: int

			def __init__(self, data: int) -> None:
				self._data = data

			@abstractmethod
			def AbstractMethod(self) -> bool:
				return False

		class DerivedAbstractBase(AbstractBase):
			def AbstractMethod(self) -> bool:
				return super().AbstractMethod()

		derived = DerivedAbstractBase(3)

		with self.assertRaises(NotImplementedError) as ExceptionCapture:
			derived.AbstractMethod()

		self.assertEqual("Method 'AbstractMethod' is abstract and needs to be overridden in a derived class.", str(ExceptionCapture.exception))

	def test_DoubleDerivedAbstractBase(self) -> None:
		class AbstractBase(metaclass=ExtendedType):
			_data: int

			def __init__(self, data: int) -> None:
				self._data = data

			@abstractmethod
			def AbstractMethod(self) -> bool:
				return False

		class DerivedAbstractBase(AbstractBase):
			def AbstractMethod(self) -> bool:
				return super().AbstractMethod()

		class DoubleDerivedAbstractBase(DerivedAbstractBase):
			pass

		derived = DoubleDerivedAbstractBase(4)

		with self.assertRaises(NotImplementedError) as ExceptionCapture:
			derived.AbstractMethod()

		self.assertEqual("Method 'AbstractMethod' is abstract and needs to be overridden in a derived class.", str(ExceptionCapture.exception))

	def test_DerivedAbstractClass(self) -> None:
		class AbstractBase(metaclass=ExtendedType):
			_data: int

			def __init__(self, data: int) -> None:
				self._data = data

			@abstractmethod
			def AbstractMethod(self) -> bool:
				return False

		class AbstractClass(AbstractBase):
			pass

		class DerivedAbstractClass(AbstractClass):
			def AbstractMethod(self) -> bool:
				return super().AbstractMethod()

		derived = DerivedAbstractClass(5)

		with self.assertRaises(NotImplementedError) as ExceptionCapture:
			derived.AbstractMethod()

		self.assertEqual("Method 'AbstractMethod' is abstract and needs to be overridden in a derived class.", str(ExceptionCapture.exception))

	def test_MultipleInheritance(self) -> None:
		class AbstractBase(metaclass=ExtendedType):
			_data: int

			def __init__(self, data: int) -> None:
				self._data = data

			@abstractmethod
			def AbstractMethod(self) -> bool:
				return False

		class Mixin:
			def AbstractMethod(self) -> bool:
				return True

		class MultipleInheritance(AbstractBase, Mixin):
			pass

		derived = MultipleInheritance(6)
		derived.AbstractMethod()


class MustOverride(TestCase):
	def test_MustOverrideBase(self) -> None:
		class MustOverrideBase(metaclass=ExtendedType):
			@mustoverride
			def MustOverrideMethod(self) -> bool:
				return False

		with self.assertRaises(AbstractClassError) as ExceptionCapture:
			MustOverrideBase()

		self.assertIn("MustOverrideBase", str(ExceptionCapture.exception))
		self.assertIn("MustOverrideMethod", str(ExceptionCapture.exception))

	def test_MustOverrideClass(self) -> None:
		class MustOverrideBase(metaclass=ExtendedType):
			@mustoverride
			def MustOverrideMethod(self) -> bool:
				return False

		class MustOverrideClass(MustOverrideBase):
			pass

		with self.assertRaises(AbstractClassError) as ExceptionCapture:
			MustOverrideClass()

		self.assertIn("MustOverrideClass", str(ExceptionCapture.exception))
		self.assertIn("MustOverrideMethod", str(ExceptionCapture.exception))

	def test_DerivedMustOverride(self) -> None:
		class MustOverrideBase(metaclass=ExtendedType):
			@mustoverride
			def MustOverrideMethod(self) -> bool:
				return False

		class DerivedMustOverrideClass(MustOverrideBase):
			def MustOverrideMethod(self) -> bool:
				return super().MustOverrideMethod()

		DerivedMustOverrideClass()


class NotImplemented(TestCase):
	def test_NotImplementedBase(self) -> None:
		class NotImplementedBase(metaclass=ExtendedType):
			@notimplemented("It's not working.")
			def NotYetFinished(self, param: int) -> bool:
				"""Documentation is unfinished."""
				return False

		c = NotImplementedBase()

		self.assertEqual("Documentation is unfinished.", c.NotYetFinished.__doc__)
		self.assertEqual("NotYetFinished", c.NotYetFinished.__name__)

		with self.assertRaises(NotImplementedError) as ExceptionCapture:
			c.NotYetFinished(4)

		self.assertEqual("It's not working.", str(ExceptionCapture.exception))
