#!/usr/bin/env python3
"""Refresh the root README's pass status from the tier's own audit.

The root README's inventory and summary tables say how far each project
got.  `_tools/audit_promoted.py` knows whether a project meets every item
of `PROMPTS.md`'s promotion checklist, so the status column is derived from
it rather than kept by hand.

Only the pass wording changes: the coverage figure, the vectors and the
promotion dates are left as they are.

Usage:
    python3 _tools/refresh_readme_status.py [--write]
"""

import argparse
import importlib.util
import re
import sys
from pathlib import Path

ROOT = Path(__file__).resolve().parent.parent


def load_audit():
    spec = importlib.util.spec_from_file_location(
        "audit_promoted", ROOT / "_tools" / "audit_promoted.py")
    m = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(m)
    return m


def main():
    ap = argparse.ArgumentParser(description=__doc__.splitlines()[0])
    ap.add_argument("--write", action="store_true")
    args = ap.parse_args()

    audit = load_audit()
    projects = []
    for base in ("NROM", "CNROM", "UNROM", "MAPPER8"):
        for d in sorted((ROOT / base).iterdir()):
            if d.is_dir() and (d / "prg.s").is_file():
                projects.append(f"{base}/{d.name}")

    ok = set()
    for p in projects:
        res = audit.audit(p, build=False)
        res.pop("5b", None)      # the informational entry-point count
        if not res:
            ok.add(p.split("/", 1)[1])

    readme = ROOT / "README.md"
    lines = readme.read_text().split("\n")
    out, changed = [], 0
    for line in lines:
        m = re.match(r"^\| (\d+) \| (.+?) \| (.*)$", line)
        if m and m.group(2).strip() in ok and "partial" in line:
            new = line.replace("Pass 3 partial", "Pass 3 complete")
            new = new.replace("Pass 2/3 partial", "Pass 2/3 complete")
            if new != line:
                changed += 1
            line = new
        out.append(line)

    print(f"{changed} row(s) updated; {len(ok)} project(s) pass the checklist")
    if args.write:
        readme.write_text("\n".join(out))
        print("written")


if __name__ == "__main__":
    sys.exit(main())