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

usage() {
  cat <<'EOF'
Usage: scripts/new-package.sh <AppName> [--id <com.example.app>] [--title <Title>] [--port <port>]

Creates CloudronPackages/<AppName> from PackageTemplate and replaces placeholders:
  __APP_ID__, __APP_TITLE__, __HTTP_PORT__

Examples:
  scripts/new-package.sh MyApp --id com.example.myapp --title "My App" --port 3000
EOF
}

if [[ $# -lt 1 ]]; then
  usage; exit 1
fi

APP_NAME="$1"; shift
APP_ID="com.example.${APP_NAME,,}"
APP_TITLE="$APP_NAME"
HTTP_PORT="3000"
BASE_TAG="5.0.0"

while [[ $# -gt 0 ]]; do
  case "$1" in
    --id) APP_ID="$2"; shift 2;;
    --title) APP_TITLE="$2"; shift 2;;
    --port) HTTP_PORT="$2"; shift 2;;
    --base) BASE_TAG="$2"; shift 2;;
    -h|--help) usage; exit 0;;
    *) echo "Unknown argument: $1"; usage; exit 1;;
  esac
done

SRC_DIR="CloudronPackages/PackageTemplate"
DEST_DIR="CloudronPackages/${APP_NAME}"

[[ -d "$SRC_DIR" ]] || { echo "Template not found: $SRC_DIR"; exit 1; }
[[ -e "$DEST_DIR" ]] && { echo "Destination already exists: $DEST_DIR"; exit 1; }

mkdir -p "$DEST_DIR"
cp -a "$SRC_DIR"/. "$DEST_DIR"/

# Replace placeholders in text files
find "$DEST_DIR" -type f \( -name "*" ! -name "*.png" \) -print0 | while IFS= read -r -d '' f; do
  sed -i "s#__APP_ID__#${APP_ID}#g" "$f"
  sed -i "s#__APP_TITLE__#${APP_TITLE}#g" "$f"
  sed -i "s#__HTTP_PORT__#${HTTP_PORT}#g" "$f"
  sed -i "s#__CLOUDRON_BASE__#${BASE_TAG}#g" "$f"
done

echo "Created package at: $DEST_DIR"
echo "Next steps: edit Dockerfile and start.sh to run your app. Add logo.png if desired."