import os
from pathlib import Path, PurePath, PurePosixPath, PureWindowsPath

from PyTeX.build.build import PyTeXBuilder
from PyTeX.build.build.enums import PyTeXRootDirType


class PyTeXPurePath:
    pass


class PyTeXPurePath(PurePath):
    def __new__(cls, pytex_root_dir_type: PyTeXRootDirType, *args):
        if cls is PyTeXPurePath:
            cls = PyTeXPureWindowsPath if os.name == 'nt' else PyTeXPurePosixPath
        self = cls._from_parts(args)
        self.__init(pytex_root_dir_type)
        return self

    def __init(self, pytex_root_dir_type: PyTeXRootDirType):
        self._pytex_root_dir_type: PyTeXRootDirType = pytex_root_dir_type
        self._root_dir: Path = {
            PyTeXRootDirType.BUILD: PyTeXBuilder.build_root(),
            PyTeXRootDirType.PYTEX_SOURCE: PyTeXBuilder.source_root(),
            PyTeXRootDirType.DOC: PyTeXBuilder.doc_root(),
            PyTeXRootDirType.TEX_SOURCE: PyTeXBuilder.tex_root()
        }[self._pytex_root_dir_type]
        try:
            if self._pytex_root_dir_type == PyTeXRootDirType.PYTEX_SOURCE:
                self._relative_path = self.relative_to(self._root_dir)
            else:
                self._relative_path = self.relative_to(
                    self._root_dir / PyTeXBuilder.wrapper_dir()
                )
        except ValueError as e:
            raise NotImplementedError

    def root_dir_type(self) -> PyTeXRootDirType:
        return self._pytex_root_dir_type

    @property
    def relative_path(self) -> PyTeXPurePath:
        return self._relative_path

    def __truediv__(self, other):
        if self._pytex_root_dir_type == PyTeXRootDirType.PYTEX_SOURCE:
            return super().__truediv__(other)
        else:
            return super().__truediv__(PyTeXBuilder.wrapper_dir()).__truediv__(other)


class PyTeXPurePosixPath(PurePosixPath, PyTeXPurePath):
    pass


class PyTeXPureWindowsPath(PureWindowsPath, PyTeXPurePath):
    pass


class PyTeXPath(Path, PyTeXPurePath):
    def __new__(cls, pytex_root_dir_type: PyTeXRootDirType, *args, **kwargs):
        if cls is PyTeXPath:
            cls = PyTeXWindowsPath if os.name == 'nt' else PyTeXPosixPath
        return super().__new__(cls, *args, **kwargs)


class PyTeXPosixPath(PyTeXPath, PyTeXPurePosixPath):
    pass


class PyTeXWindowsPath(PyTeXPath, PyTeXPureWindowsPath):
    pass