#!/usr/bin/env bash
# Row 56 byte-identity check. Runs `mosaic-task.mjs list` and `show` from a
# baseline tree and a candidate tree against the same seeded data roots and
# compares stdout, stderr and exit codes byte for byte. It also checks that
# neither tree changed the data root.
# Usage: byte-check.sh BASE_TREE CAND_TREE WORK_DIR   (WORK_DIR must not exist)
set -euo pipefail
BASE="$(cd "$1" && pwd)"; CAND="$(cd "$2" && pwd)"; W="$3"
HERE="$(cd "$(dirname "$0")" && pwd)"
[ ! -e "$W" ] || { echo "byte-check: $W exists" >&2; exit 4; }
mkdir -p "$W/out"; W="$(cd "$W" && pwd)"
"$HERE/seed.sh" "$W/data"
mkdir -p "$W/empty"
conf() { printf '{"configVersion":1,"environment":"development","dataRoot":"%s","execution":{"backend":"docker","provider":"zai","model":"m"}}\n' "$2" > "$W/$1.json"; }
conf seeded "$W/data"; conf empty "$W/empty"; conf absent "$W/no-such-root"

snapshot() { (cd "$W/data" && find . -printf '%p %y %s %T@ %l\n' | sort && find . -type f -print0 | sort -z | xargs -0 sha256sum); }
snapshot > "$W/before.txt"

CASES=(
  "seeded list"
  "empty list"
  "absent list"
  "seeded show r-20260101T000000Z-aaaaaa"
  "seeded show r-20260101T000100Z-bbbbbb"
  "seeded show r-20260101T000200Z-cccccc"
  "seeded show r-20260101T000300Z-dddddd"
  "seeded show r-20260101T000400Z-eeeeee"
  "seeded show r-20260101T000500Z-ffffff"
  "seeded show r-20260101T000700Z-hhhhhh"
  "seeded show r-20260101T000800Z-iiiiii"
  "seeded show r-zz.weird_name-1"
  "seeded show r-missing"
  "seeded show ../escape"
  "seeded show"
  "absent show r-20260101T000000Z-aaaaaa"
)
for tree in base cand; do
  root="$BASE"; [ "$tree" = cand ] && root="$CAND"
  i=0
  for c in "${CASES[@]}"; do
    i=$((i + 1))
    read -r cfg op arg <<<"$c"
    o="$W/out/$tree/$(printf '%02d' "$i")"
    mkdir -p "$o"
    printf '%s\n' "$c" > "$o/case"
    rc=0
    (cd "$root" && env -u NODE_OPTIONS MOSAIC_CONFIG="$W/$cfg.json" node scripts/mosaic-task.mjs "$op" ${arg:+"$arg"} >"$o/stdout" 2>"$o/stderr") || rc=$?
    printf '%s\n' "$rc" > "$o/exit"
    [ -f "$o/stdout" ] && [ -f "$o/stderr" ] || { echo "byte-check: case $i ($c) left no output in $o" >&2; exit 4; }
  done
done
snapshot > "$W/after.txt"

status=0
if diff -r "$W/out/base" "$W/out/cand" > "$W/diff.txt"; then
  echo "byte-check: ${#CASES[@]} cases, stdout, stderr and exit identical"
else
  echo "byte-check: DIFFERENCES (see $W/diff.txt)"; status=1
fi
if cmp -s "$W/before.txt" "$W/after.txt"; then
  echo "byte-check: data root unchanged"
else
  echo "byte-check: DATA ROOT CHANGED"; status=1
fi
exit "$status"