#!/usr/bin/env python3
"""Draft artifact: md_inspect.py — lightweight Markdown structure inspector."""
import re
import sys
from pathlib import Path


def inspect(path: str) -> dict:
    text = Path(path).read_text(encoding="utf-8")
    lines = text.splitlines()
    headings = [ln for ln in lines if re.match(r"^#{1,6}\s", ln)]
    words = len(text.split())
    links = re.findall(r"\[[^\]]+\]\([^\)]+\)", text)
    return {
        "file": path,
        "lines": len(lines),
        "headings": len(headings),
        "words": words,
        "links": len(links),
    }


def main() -> int:
    if len(sys.argv) < 2:
        print("usage: md_inspect.py <file.md>", file=sys.stderr)
        return 2
    data = inspect(sys.argv[1])
    for k, v in data.items():
        print(f"{k}={v}")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())