from __future__ import annotations

from . import debug

from typing import Coroutine, Tuple, Type, Callable, TypeVar, Optional, List, Any, Dict
from types import FunctionType

import abc

APP_VERSION = 3004000
TDF_MAGIC = b"TDF$"

_T = TypeVar("_T")
_TCLS = TypeVar("_TCLS", bound=type)
_RT = TypeVar("_RT")
_F = TypeVar("_F", bound=Callable[..., Any])


class BaseMetaClass(abc.ABCMeta):  # pragma: no cover
    def __new__(
        cls: Type[_T], clsName: str, bases: Tuple[type], attrs: Dict[str, Any]
    ) -> _T:

        # Hook all subclass methods
        if debug.IS_DEBUG_MODE:  # pragma: no cover
            ignore_list = [
                "__new__",
                "__del__",
                "__get__",
                "__call__",
                "__set_name__",
                "__str__",
                "__repr__",
            ]

            for attr, val in attrs.items():
                if (
                    not attr in ignore_list
                    and callable(val)
                    and not isinstance(val, type)
                ):
                    newVal = debug.DebugMethod(val)
                    attrs[attr] = newVal

        result = super().__new__(cls, clsName, bases, attrs)

        return result


class BaseObject(object, metaclass=BaseMetaClass):
    pass


class override(object):  # nocov
    """
    To use inside a class decorated with @extend_class\n
    Any attributes decorated with @override will be replaced
    """

    def __new__(cls, decorated_func: _F) -> _F:

        # check if decorated_cls really is a function
        if not isinstance(decorated_func, FunctionType):
            raise BaseException(
                "@override decorator is only for functions, not classes"
            )

        decorated_func.__isOverride__ = True  # type: ignore
        return decorated_func  # type: ignore

    @staticmethod
    def isOverride(func: _F) -> bool:
        if not hasattr(func, "__isOverride__"):
            return False
        return func.__isOverride__


class extend_class(object):  # nocov
    """
    Extend a class, all attributes will be added to its parents\n
    This won't override attributes that are already existed, please refer to @override or @extend_override_class to do this
    """

    def __new__(cls, decorated_cls: _TCLS, isOverride: bool = False) -> _TCLS:

        # check if decorated_cls really is a class (type)
        if not isinstance(cls, type):
            raise BaseException(
                "@extend_class decorator is only for classes, not functions"
            )

        newAttributes = dict(decorated_cls.__dict__)
        crossDelete = ["__abstractmethods__", "__module__", "_abc_impl", "__doc__"]
        [
            (newAttributes.pop(cross) if cross in newAttributes else None)
            for cross in crossDelete
        ]

        crossDelete = {}

        base = decorated_cls.__bases__[0]

        if not isOverride:
            # loop through its parents and add attributes

            for attributeName, attributeValue in newAttributes.items():

                # check if class base already has this attribute
                result = extend_class.getattr(base, attributeName)

                if result != None:
                    if id(result["value"]) == id(attributeValue):
                        crossDelete[attributeName] = attributeValue
                    else:

                        # if not override this attribute
                        if not override.isOverride(attributeValue):
                            print(
                                f"[{attributeName}] {id(result['value'])} - {id(attributeValue)}"
                            )
                            raise BaseException("err")

            [newAttributes.pop(cross) for cross in crossDelete]

        for attributeName, attributeValue in newAttributes.items():

            # let's backup this attribute for future uses
            result = extend_class.getattr(base, attributeName)

            if result != None:
                # ! dirty code, gonna fix it later, it's okay for now
                setattr(
                    base,
                    f"__{decorated_cls.__name__}__{attributeName}",
                    result["value"],
                )
                setattr(
                    decorated_cls,
                    f"__{decorated_cls.__name__}__{attributeName}",
                    result["value"],
                )

            setattr(base, attributeName, attributeValue)

        return decorated_cls

    @staticmethod
    def object_hierarchy_getattr(obj: object, attributeName: str) -> List[str]:

        results = []
        if type(obj) == object:
            return results

        if attributeName in obj.__dict__:
            val = obj.__dict__[attributeName]
            results.append({"owner": obj, "value": val})

        if attributeName in obj.__class__.__dict__:
            val = obj.__class__.__dict__[attributeName]
            results.append({"owner": obj, "value": val})

        for base in obj.__bases__:  # type: ignore
            results += extend_class.object_hierarchy_getattr(base, attributeName)

        results.reverse()
        return results

    @staticmethod
    def getattr(obj: object, attributeName: str) -> Optional[dict]:
        try:
            value = getattr(obj, attributeName)
            return {"owner": obj, "value": value}
        except BaseException as e:
            return None


class extend_override_class(extend_class):
    """
    Extend a class, all attributes will be added to its parents\n
    If those attributes are already existed, they will be replaced by the new one
    """

    def __new__(cls, decorated_cls: _TCLS) -> _TCLS:
        return super().__new__(cls, decorated_cls, True)


class sharemethod(type):
    def __get__(self, obj, cls):
        self.__owner__ = obj if obj else cls
        return self

    def __call__(self, *args) -> Any:
        return self.__fget__.__get__(self.__owner__)(*args)  # type: ignore

    def __set_name__(self, owner, name):
        self.__owner__ = owner

    def __new__(cls: Type[_T], func: _F) -> Type[_F]:

        clsName = func.__class__.__name__
        bases = func.__class__.__bases__
        attrs = func.__dict__
        # attrs = dict(func.__class__.__dict__)
        result = super().__new__(cls, clsName, bases, attrs)
        result.__fget__ = func

        return result