#!/usr/bin/env bash
# Updates the vendored CEM template model set (Ewan Howell / wynem: vanilla Java entity models as JSON). It is
# only the rest-pose FALLBACK for entity types missing from the vanilla client dump (+ the elytra fallback);
# mob and block-entity models come from tools/update-vanilla-models.sh.
#
# Usage:  tools/update-cem-models.sh           # update if newer
#         tools/update-cem-models.sh --force   # always overwrite
set -euo pipefail

URL="https://wynem.com/assets/json/cem_template_models.json"
DEST="$(cd "$(dirname "$0")/.." && pwd)/src/main/resources/cem/cem_template_models.json"
TMP="$(mktemp)"
trap 'rm -f "$TMP"' EXIT

echo "Fetching $URL ..."
curl -fsSL "$URL" -o "$TMP"

# Validates the download, prints "<new version> <model count> <current version>".
read -r NEW_VER NEW_COUNT CUR_VER < <(python3 - "$TMP" "$DEST" <<'PY'
import json, os, sys
d = json.load(open(sys.argv[1]))
assert 'models' in d and len(d['models']) > 50, 'unexpected structure'
cur = '(none)'
if os.path.exists(sys.argv[2]):
    try: cur = json.load(open(sys.argv[2])).get('version', '?')
    except Exception: cur = '?'
print(d.get('version', '?'), len(d['models']), cur)
PY
)

echo "Current: $CUR_VER   Remote: $NEW_VER   ($NEW_COUNT models)"
if [ "${1:-}" != "--force" ] && [ "$CUR_VER" = "$NEW_VER" ]; then
  echo "Already up to date. (use --force to overwrite)"
  exit 0
fi

mkdir -p "$(dirname "$DEST")"
cp "$TMP" "$DEST"
echo "Updated -> $DEST  (version $NEW_VER, $NEW_COUNT models)"
echo "Rebuild/redeploy the plugin to apply."