#!/usr/bin/env python3
"""What has never been looked at.

RISK-WP-0005-T07, deliberately minimal. The register knows what was reported.
Without this it has no view of what was never assessed, so a system with zero
findings is indistinguishable from a system nobody has examined — while
RISK-N-0003 records that every repo which *has* examined its own boundary this
month found a defect.

This does not assess anything and does not grade anyone. It counts.
"""
from __future__ import annotations

import json
import urllib.error
import urllib.request

import register_lib as lib

HUB = "http://127.0.0.1:8000/repos/"


def repos() -> list[dict] | None:
    for url in (HUB, "http://127.0.0.1:8000/repos"):
        try:
            with urllib.request.urlopen(url, timeout=8) as r:
                data = json.load(r)
                return data if isinstance(data, list) else data.get("items", [])
        except (urllib.error.URLError, TimeoutError, json.JSONDecodeError, OSError):
            continue
    return None


def main() -> int:
    all_repos = repos()
    seen: dict[str, list[str]] = {}
    for f in lib.findings():
        for key in (f.get("system"), f.get("fix_owner"), f.get("reported_by")):
            if key and isinstance(key, str):
                seen.setdefault(key, []).append(f["id"])

    print("Coverage — what the register has heard from\n")
    print(f"  systems that have produced or carried a finding: {len(seen)}")
    for name in sorted(seen):
        print(f"    {name}: {', '.join(sorted(set(seen[name])))}")

    if all_repos is None:
        print("\n  Hub unreachable — the denominator is unknown, which is the whole point of this report.")
        return 0

    names = {r.get("slug") for r in all_repos if r.get("slug")}
    unheard = sorted(names - set(seen))
    print(f"\n  registered repos: {len(names)}")
    print(f"  never appeared in any finding: {len(unheard)}")
    print("\n  A repo in that list has either nothing wrong with it or nobody looking.")
    print("  This register cannot tell which, and does not guess.\n")
    for name in unheard[:40]:
        print(f"    {name}")
    if len(unheard) > 40:
        print(f"    … and {len(unheard) - 40} more")
    return 0


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