#!/usr/bin/env bash
# Rebrand peardata → your product name.
# Usage: bash scripts/rename-template.sh my-app MyApp
set -euo pipefail

OLD_SLUG="peardata"
OLD_NAME="peardata"
OLD_PRODUCT="PearData"
OLD_PROTOCOL="peardata/rpc"
OLD_PREFIX="pd1."
OLD_ENV="PEARDATA_"

NEW_SLUG="${1:-}"
NEW_PRODUCT="${2:-}"

if [[ -z "$NEW_SLUG" || -z "$NEW_PRODUCT" ]]; then
  echo "Usage: $0 <slug> <ProductName>"
  echo "  example: $0 notes-mesh NotesMesh"
  exit 1
fi

if [[ ! "$NEW_SLUG" =~ ^[a-z][a-z0-9-]*$ ]]; then
  echo "slug must be lowercase alphanumeric + dashes"
  exit 1
fi

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
cd "$ROOT"

PREFIX="$(echo "$NEW_SLUG" | tr -cd 'a-z' | cut -c1-2)1."
ENV_PREFIX="$(echo "$NEW_SLUG" | tr 'a-z-' 'A-Z_')_"
ENV_PREFIX="${ENV_PREFIX//__/_}"

echo "Renaming:"
echo "  package: $OLD_NAME → $NEW_SLUG"
echo "  product: $OLD_PRODUCT → $NEW_PRODUCT"
echo "  protocol: $OLD_PROTOCOL → ${NEW_SLUG}/rpc"
echo "  invite: $OLD_PREFIX → $PREFIX"
echo "  env: $OLD_ENV → $ENV_PREFIX"

export LC_ALL=C
# Use python for safe replacements (perl struggles with slashes in protocol id)
python3 - "$OLD_NAME" "$NEW_SLUG" "$OLD_PRODUCT" "$NEW_PRODUCT" "$OLD_PROTOCOL" "${NEW_SLUG}/rpc" "$OLD_SLUG" "$NEW_SLUG" "$OLD_PREFIX" "$PREFIX" "$OLD_ENV" "$ENV_PREFIX" <<'PY'
import os, sys
from pathlib import Path

pairs = list(zip(sys.argv[1::2], sys.argv[2::2]))
# longer keys first
pairs.sort(key=lambda x: -len(x[0]))
SKIP = {'node_modules', '.git', 'data'}
EXTS = {'.js','.mjs','.cjs','.json','.md','.html','.css','.yml','.yaml','.service','.example','.sh'}

for dirpath, dirnames, filenames in os.walk('.'):
    dirnames[:] = [d for d in dirnames if d not in SKIP]
    for name in filenames:
        p = Path(dirpath) / name
        if p.suffix not in EXTS:
            continue
        try:
            text = p.read_text(encoding='utf-8')
        except Exception:
            continue
        orig = text
        for a, b in pairs:
            text = text.replace(a, b)
        if text != orig:
            p.write_text(text, encoding='utf-8')
            print('updated', p)
PY

if [[ -f bin/peardata-server.mjs && "$NEW_SLUG" != "peardata" ]]; then
  mv bin/peardata-server.mjs "bin/${NEW_SLUG}-server.mjs"
fi
if [[ -f deploy/peardata.service && "$NEW_SLUG" != "peardata" ]]; then
  mv deploy/peardata.service "deploy/${NEW_SLUG}.service"
fi

echo "Done. Review git diff, then: npm install && npm test"