#!/usr/bin/env python
#
# Copyright 2021, Heidelberg University Clinic
#
# File author(s): Sebastian Lobentanzer
#                 ...
#
# Distributed under MIT licence, see the file `LICENSE`.
#
"""
Package metadata (version, authors, etc).
"""

__all__ = ["get_metadata"]

import os
import pathlib
import importlib.metadata

import toml

_VERSION = "0.6.0"


def get_metadata():
    """
    Basic package metadata.

    Retrieves package metadata from the current project directory or from
    the installed package.
    """

    here = pathlib.Path(__file__).parent
    pyproj_toml = "pyproject.toml"
    meta = {}

    for project_dir in (here, here.parent):
        toml_path = str(project_dir.joinpath(pyproj_toml).absolute())

        if os.path.exists(toml_path):
            pyproject = toml.load(toml_path)

            meta = {
                "name": pyproject["tool"]["poetry"]["name"],
                "version": pyproject["tool"]["poetry"]["version"],
                "author": pyproject["tool"]["poetry"]["authors"],
                "license": pyproject["tool"]["poetry"]["license"],
                "full_metadata": pyproject,
            }

            break

    if not meta:
        try:
            meta = {
                k.lower(): v
                for k, v in importlib.metadata.metadata(here.name).items()
            }

        except importlib.metadata.PackageNotFoundError:
            pass

    meta["version"] = meta.get("version", None) or _VERSION

    return meta


metadata = get_metadata()
__version__ = metadata.get("version", None)
__author__ = metadata.get("author", None)
__license__ = metadata.get("license", None)