#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""check-test-record.py — catalog gate: every ladder is well-formed and agrees with its compose.

    python3 scripts/check-test-record.py                 # every template
    python3 scripts/check-test-record.py navidrome romm  # only these
    python3 scripts/check-test-record.py --root DIR ...  # another checkout (decoy tests)

`09-update-architecture.md` §3 decision 13 (the test decides, not the tag) and §6.4 part 4. This is
the STATIC half: no git history, no network — so it runs in the pre-push hook AND in CI, whose clone
is shallow (the R-452 gap that skips every history gate there). Its twin
`check-test-record-move.py` is the half that needs history: an image MOVE must add a proven entry.

WHAT IT CHECKS, per template that carries `update_ladder:` (format and field rules: ladder.py):
  1. every line of the block is a one-line JSON entry, and every entry is well-formed
     (verdict proven|unrecorded only; a sha256 digest per `to` service; the memory watch's peak on
     any entry not backfilled; marks.memory_tight agrees with the peak);
  2. the ladder is CONTINUOUS — each entry's `from` is the previous entry's `to`;
  3. the NEWEST entry's `to` is EXACTLY the compose's current image per service. This is the fact
     that makes the rule hold without history: a compose moved without a new entry no longer
     matches its ladder's head, whoever pushed it and however.

A template WITHOUT a ladder passes here — it has never been moved since the gate existed, and its
first move is refused by the twin unless that move brings the first entry.

Exit 0 clean · 1 convicted · 2 inconclusive (nothing to read).
"""
import os
import sys

sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
import ladder  # noqa: E402

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


def check_app(app_dir):
    """List of problem sentences for one template directory ([] = clean or no ladder)."""
    fy = os.path.join(app_dir, ".felhom.yml")
    comp = os.path.join(app_dir, "docker-compose.yml")
    if not os.path.exists(fy) or not os.path.exists(comp):
        return []
    entries, _raws, errors = ladder.parse(open(fy, encoding="utf-8").read())
    if not entries and not errors:
        return []
    problems = list(errors)
    for i, e in enumerate(entries):
        for p in ladder.check_entry(e):
            problems.append("entry %d: %s" % (i + 1, p))
    for i in range(1, len(entries)):
        if entries[i].get("from") != entries[i - 1].get("to"):
            problems.append("entry %d's `from` is not entry %d's `to` — the ladder has a gap" % (i + 1, i))
    if entries:
        current = ladder.images_in(open(comp, encoding="utf-8").read())
        head = entries[-1].get("to")
        if head != current:
            diff = sorted(set(current.items()) ^ set((head or {}).items()))
            problems.append("the compose's images are not the ladder's newest step — an image moved "
                            "without a test record, or the record names other refs: %s" % diff)
    return problems


def main(argv):
    root = ROOT
    if "--root" in argv:
        i = argv.index("--root")
        root = argv[i + 1]
        argv = argv[:i] + argv[i + 2:]
    only = [a for a in argv if not a.startswith("-")]
    tdir = os.path.join(root, "templates")
    apps = sorted(only) if only else sorted(os.listdir(tdir))
    seen = with_ladder = 0
    convicted = []
    for app in apps:
        d = os.path.join(tdir, app)
        if not os.path.isdir(d):
            print("test-record: no such template %r" % app)
            return 2
        seen += 1
        text = open(os.path.join(d, ".felhom.yml"), encoding="utf-8").read() if os.path.exists(
            os.path.join(d, ".felhom.yml")) else ""
        if "update_ladder:" in text:
            with_ladder += 1
        probs = check_app(d)
        if probs:
            convicted.append(app)
            for p in probs:
                print("FAIL %s: %s" % (app, p))
    if seen == 0:
        print("TEST-RECORD GATE INCONCLUSIVE: no template read")
        return 2
    print("test-record gate — %d template(s) read, %d carry a ladder, %d convicted"
          % (seen, with_ladder, len(convicted)))
    return 1 if convicted else 0


if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))