#!/usr/bin/env bash
# CHECK — ledger churn artifact verification.
# Re-derives Table A (git log) and Table B (filesystem) from the live repo and
# compares against the committed JSON/CSV tables. Exits 0 only on exact match.
set -u
REPO=/root/troupe-standup
OUT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# --- Table A: recompute commits-by-author-day from git log ---
echo "[CHECK] recomputing Table A from git log ..."
python3 - "$OUT" <<'PY'
import sys, json, subprocess, collections
OUT = sys.argv[1]
git = subprocess.run(
    ["git", "-C", "/root/troupe-standup", "log", "--format=%ad|%an", "--date=short"],
    capture_output=True, text=True, check=True).stdout
exp = collections.Counter()
for line in git.splitlines():
    if line.strip():
        d, a = line.split("|", 1)
        exp[(d, a)] += 1
got = collections.Counter()
for x in json.load(open(OUT + "/commits_by_author_day.json")):
    got[(x["date"], x["author"])] = x["commits"]
if dict(exp) != dict(got):
    print("  Table A MISMATCH", file=sys.stderr)
    print("  expected %d pairs, committed %d pairs" % (len(exp), len(got)), file=sys.stderr)
    sys.exit(1)
PY
if [ $? -ne 0 ]; then exit 1; fi

# --- Table B: recompute work inventory from filesystem ---
echo "[CHECK] recomputing Table B from filesystem ..."
python3 - "$OUT" <<'PY'
import sys, os, json
OUT = sys.argv[1]
REPO = "/root/troupe-standup"
inv = {}
for d in os.listdir(os.path.join(REPO, "wizard-work")):
    p = os.path.join(REPO, "wizard-work", d)
    if not os.path.isdir(p):
        continue
    fl = []
    for root, _, names in os.walk(p):
        for n in names:
            f = os.path.join(root, n)
            st = os.stat(f)
            fl.append({"bytes": st.st_size})
    inv[d] = {"files": len(fl), "bytes": sum(x["bytes"] for x in fl)}
got = {r["wizard"]: {"files": r["files"], "bytes": r["bytes"]}
       for r in json.load(open(OUT + "/wizard_inventory.json"))}
if inv != got:
    print("  Table B MISMATCH", file=sys.stderr)
    sys.exit(1)
PY
if [ $? -ne 0 ]; then exit 1; fi

# --- Table C: spot-check headline totals in the md artifact ---
echo "[CHECK] re-deriving headline totals ..."
python3 - "$OUT" <<'PY'
import sys, json
OUT = sys.argv[1]
commits = sum(x["commits"] for x in json.load(open(OUT + "/commits_by_author_day.json")))
files = sum(r["files"] for r in json.load(open(OUT + "/wizard_inventory.json")))
bytes_ = sum(r["bytes"] for r in json.load(open(OUT + "/wizard_inventory.json")))
head = open(OUT + "/troupe-churn.md").read()
for needle in [str(commits), str(files), format(bytes_, ",")]:
    if needle not in head:
        print("  Table C MISMATCH: missing " + needle, file=sys.stderr)
        sys.exit(1)
PY
if [ $? -ne 0 ]; then exit 1; fi

echo "CHECK PASS: Table A, Table B, and headline totals all re-derive cleanly."
exit 0