from __future__ import annotations

import importlib
from pathlib import Path


def repository_root() -> Path:
    """Absolute path to the repository root (the directory that contains ``src/``)."""
    return Path(__file__).resolve().parent.parent.parent


def resolve_repo_path(path: str | Path) -> Path:
    """
    Resolve *path* against the repository root when it is relative; absolute paths are only ``.resolve()``-ed.
    Use this so ``cache/...`` and ``configs/...`` work no matter the process working directory.
    """
    p = Path(path)
    if p.is_absolute():
        return p.resolve()
    return (repository_root() / p).resolve()


def import_from_path(path: str):
    if ":" not in path:
        raise ValueError("Expected class path format 'module.submodule:ClassName'.")
    module_name, symbol_name = path.split(":", maxsplit=1)
    module = importlib.import_module(module_name)
    return getattr(module, symbol_name)