from pathlib import Path, PurePath
from typing import Optional
from PyTeX.format.formatting_config import FormattingConfig

from ..enums import PyTeXRootDirType


class GlobalPyTeXConfig:
    _source_root: Optional[Path] = None
    _build_root: Optional[Path] = None
    _doc_root: Optional[Path] = None
    _tex_root: Optional[Path] = None
    _wrapper_dir: Optional[PurePath] = None

    _default_formatting_config: Optional[FormattingConfig] = None

    _recursive: bool = True
    _overwrite_existing_files: bool = False
    _clean_old_files: True

    _allow_dirty: bool = False

    _build_target: PyTeXRootDirType = None

    @classmethod
    def init(
            cls,
            source_root: Optional[Path] = None,
            build_root: Optional[Path] = None,
            doc_root: Optional[Path] = None,
            tex_root: Optional[Path] = None,
            wrapper_dir: Optional[PurePath] = None
    ):
        cls._source_root = source_root
        cls._build_root = build_root
        cls._doc_root = doc_root
        cls._tex_root = tex_root
        cls._wrapper_dir = wrapper_dir

    @classmethod
    def build_root(cls) -> Path:
        return cls._build_root

    @classmethod
    def doc_root(cls) -> Path:
        return cls._doc_root

    @classmethod
    def source_root(cls) -> Path:
        return cls._source_root

    @classmethod
    def tex_root(cls) -> Path:
        return cls._tex_root

    @classmethod
    def wrapper_dir(cls) -> PurePath:
        raise NotImplementedError

    @classmethod
    def build_mode(cls) -> PyTeXRootDirType:
        return cls._build_target

    @classmethod
    def target_root(cls) -> Path:
        return {
            PyTeXRootDirType.BUILD: cls.build_root(),
            PyTeXRootDirType.DOC: cls.doc_root(),
            PyTeXRootDirType.TEX_SOURCE: cls.tex_root(),
            PyTeXRootDirType.PYTEX_SOURCE: cls.source_root()
        }[cls._build_target]