"""Packaging sanity: pyproject.toml is parseable and declares expected metadata.

Verifies the metadata we rely on (name, version, console-script entry points)
is well-formed, so `pip install .` + `fastengen` CLI work. Runs without network
or install; reads the toml file directly (Python 3.11+ tomllib) or a minimal
fallback parser for 3.10.

No em-dash in code: Python 3.10 source lacks UTF-8 mode (no PEP 540).
"""

from __future__ import annotations

import os
import sys

sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "src"))

try:
    import tomllib  # Python 3.11+
    def _load_toml(path: str) -> dict:
        with open(path, "rb") as f:
            return tomllib.load(f)
except ModuleNotFoundError:  # Python 3.10
    tomllib = None

    def _load_toml(path: str) -> dict:
        # Minimal parser for the flat pyproject we own: name/version/deps/scripts.
        # Sufficient to assert presence of the keys we depend on.
        # configparser can't parse TOML; fall back to simple key scanning.
        text = open(path, encoding="utf-8").read()
        def _field(name):
            import re
            m = re.search(name + r'\s*=\s*"([^"]+)"', text)
            return m.group(1) if m else None
        return {
            "name": _field("name"),
            "version": _field("version"),
            "scripts_present": "fastengen" in text,
        }


PROJECT_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


def _pyproject():
    return _load_toml(os.path.join(PROJECT_ROOT, "pyproject.toml"))


def test_pyproject_has_name_and_version():
    cfg = _pyproject()
    # tomllib result has [project] table; minimal fallback has top-level keys.
    if tomllib is not None:
        assert cfg["project"]["name"]
        assert cfg["project"]["version"]
        assert "cadquery" in cfg["project"]["dependencies"]
        assert "fastengen" in cfg["project"]["scripts"]
    else:
        assert cfg["name"] == "FastenGen"
        assert cfg["version"]
        assert cfg["scripts_present"]