#!/usr/bin/env python3
"""CHECK-file-tree-census — verify the ledger file-tree census against git.

Exit code 0 = the artifact matches the git source of truth at the revision it
documents (verdict PASS). Non-zero = mismatch (verdict FAIL).

The artifact is a snapshot of `wizard-work/ledger/` at the revision it records
in its own `summary.head_sha`, taken BEFORE the five artifact files themselves
were added to the tree. So it must be re-derived from THAT pinned revision, not
from the moving HEAD (re-deriving from HEAD would count the artifact files
themselves and wrongly fail).

Run: python3 CHECK-file-tree-census   (from wizard-work/ledger/)
"""
import json
import subprocess
import sys

REPO = "/root/troupe-standup"
OUT = "/root/troupe-standup/wizard-work/ledger"
DAY = "2026-10-30"
JSON_PATH = "%s/%s-file-tree-census.json" % (OUT, DAY)
CSV_PATH = "%s/%s-file-tree-census.csv" % (OUT, DAY)


def git(args):
    return subprocess.check_output(["git"] + args, cwd=REPO, text=True)


def main():
    with open(JSON_PATH) as f:
        j = json.load(f)
    s = j["summary"]
    json_files = s["total_files"]
    json_bytes = s["total_bytes"]
    rev = s["head_sha"]  # revision the artifact describes

    # Independently re-derive the same figures from the pinned revision.
    git_files = 0
    git_bytes = 0
    for line in git(["ls-tree", "-r", "--format=%(objecttype) %(objectname) %(path) %(objectsize)", rev]).strip().splitlines():
        otype, _obj, path, size_s = line.split(" ", 3)
        if otype == "blob" and path.startswith("wizard-work/ledger/"):
            git_files += 1
            git_bytes += int(size_s)

    with open(CSV_PATH) as f:
        csv_rows = [l for l in f.read().splitlines() if l][1:]  # drop header
    csv_files = len(csv_rows)
    csv_bytes = sum(int(r.split(",")[1]) for r in csv_rows)
    json_manifest = j.get("manifest", [])
    json_csv_consistency = (len(json_manifest) == csv_files)

    print("pinned_rev=%s" % rev)
    print("git_files=%d  git_bytes=%d" % (git_files, git_bytes))
    print("json_files=%d  json_bytes=%d" % (json_files, json_bytes))
    print("csv_files=%d  csv_bytes=%d  json_manifest_matches_csv=%s" % (csv_files, csv_bytes, json_csv_consistency))

    ok = True
    if (json_files, json_bytes) != (git_files, git_bytes):
        ok = False
        print("MISMATCH: json(%d,%d) != git(%d,%d)" % (json_files, json_bytes, git_files, git_bytes))
    if (csv_files, csv_bytes) != (git_files, git_bytes):
        ok = False
        print("MISMATCH: csv(%d,%d) != git(%d,%d)" % (csv_files, csv_bytes, git_files, git_bytes))
    if not json_csv_consistency:
        ok = False
        print("MISMATCH: json manifest rows != csv rows")
    # Confirm the recorded revision actually resolves in the repo (no fabricated rev).
    if git(["rev-parse", rev]) != "":
        pass
    else:
        ok = False
        print("MISMATCH: recorded revision %s does not resolve" % rev)
    print("VERDICT: %s" % ("PASS" if ok else "FAIL"))
    sys.exit(0 if ok else 1)


if __name__ == "__main__":
    main()