#!/usr/bin/env bash
set -euo pipefail

# OS guard – must be macOS
if [ "$(uname)" != "Darwin" ]; then
  echo "This command only works on macOS." >&2
  exit 1
fi


# === Arguments ===
NEW_APP_NAME="${1:-}"

if [ -z "$NEW_APP_NAME" ]; then
  echo "Usage: $0 \"New App Name (e.g. Cursor Enterprise)\"" >&2
  exit 1
fi

# === Config based on name ===
ORIG_APP_NAME="Cursor"
ORIG_APP="/Applications/$ORIG_APP_NAME.app"

# slug: lowercase, alphanumeric only, used in bundle id / data dir
SLUG="$(echo "$NEW_APP_NAME" | tr '[:upper:]' '[:lower:]' | tr -cd '[:alnum:]')"
[ -z "$SLUG" ] && SLUG="custom"

BUNDLE_ID="com.cursor.$SLUG"
TARGET_APP="$HOME/Applications/$NEW_APP_NAME.app"
DATA_DIR="$HOME/Library/Application Support/${NEW_APP_NAME// /}"

echo "New app name:      $NEW_APP_NAME"
echo "Bundle identifier: $BUNDLE_ID"
echo "Target app:        $TARGET_APP"
echo "Data dir:          $DATA_DIR"
echo

# === Step 1: Copy original app ===
if [ ! -d "$ORIG_APP" ]; then
  echo "❌ Original app not found at: $ORIG_APP" >&2
  exit 1
fi

echo "📁 Creating $HOME/Applications if needed..."
mkdir -p "$HOME/Applications"

echo "📦 Copying $ORIG_APP -> $TARGET_APP ..."
cp -R "$ORIG_APP" "$TARGET_APP"

# === Step 3: Give each app its own identity ===
APP="$TARGET_APP"
PLIST="$APP/Contents/Info.plist"

echo "📝 Setting CFBundleIdentifier to $BUNDLE_ID in $PLIST ..."
if /usr/libexec/PlistBuddy -c "Set :CFBundleIdentifier $BUNDLE_ID" "$PLIST"; then
  echo "✅ CFBundleIdentifier updated."
else
  echo "ℹ️ CFBundleIdentifier not found, adding..."
  /usr/libexec/PlistBuddy -c "Add :CFBundleIdentifier string $BUNDLE_ID" "$PLIST"
  echo "✅ CFBundleIdentifier added."
fi

echo "🔏 Re-signing app (ad-hoc signature)..."
codesign --force --deep --sign - "$APP"

# === Step 4: Create separate data folders ===
echo "📂 Creating data dir: $DATA_DIR ..."
mkdir -p "$DATA_DIR"

# === Step 5: Launch ===
echo "🚀 Launching $NEW_APP_NAME..."
open -n "$APP" --args --user-data-dir "$DATA_DIR"

echo "✅ Done."