#!/usr/bin/env bash
# =============================================================
#  start.sh — Run Node-RED 5.0 locally for s2s-reasoning-engine
#
#  Usage:
#      ./start.sh                    # default port 1881
#      PORT=1900 ./start.sh          # custom port
#      LOG_LEVEL=debug ./start.sh    # detailed logging
#      DEBUG=nodes:* ./start.sh      # internal Node-RED diagnostics
#  Stop:  Ctrl+C
# =============================================================
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PARENT_DIR="$(dirname "$ROOT_DIR")"

cd "$ROOT_DIR"

# ----------------------------------------------------------
# 1) Load the local .env first, then the parent ../.env when present.
#    The parent file takes precedence when both define the same variable.
# ----------------------------------------------------------
set -a
if [ -f "$ROOT_DIR/.env" ]; then
  echo "[env] loaded  $ROOT_DIR/.env"
  # shellcheck disable=SC1091
  source "$ROOT_DIR/.env"
fi
if [ -f "$PARENT_DIR/.env" ]; then
  echo "[env] loaded  $PARENT_DIR/.env"
  # shellcheck disable=SC1091
  source "$PARENT_DIR/.env"
fi
set +a

# ----------------------------------------------------------
# 2) Node-RED runtime parameters
# ----------------------------------------------------------
PORT="${PORT:-${NODE_RED_PORT:-1881}}"
export PORT
export NODE_RED_PORT="$PORT"
export NODE_RED_LOG_LEVEL="${LOG_LEVEL:-${NODE_RED_LOG_LEVEL:-info}}"
export NODE_RED_CREDENTIAL_SECRET="${NODE_RED_CREDENTIAL_SECRET:-s2s-reasoning-local-dev}"
export FLOWS="${FLOWS:-$ROOT_DIR/.node-red/flows.json}"

# Local user directory; keep state here rather than in ~/.node-red.
USERDIR="${USERDIR:-$ROOT_DIR/.node-red}"
SETTINGS="${SETTINGS:-$USERDIR/settings.js}"

# Create the user directory and refresh its configuration from the source files.
mkdir -p "$USERDIR"
if [ ! -f "$SETTINGS" ] || [ "$ROOT_DIR/settings.js" -nt "$SETTINGS" ]; then
  cp -f "$ROOT_DIR/settings.js" "$SETTINGS"
  echo "[init] copied settings.js -> $SETTINGS"
fi
if [ ! -f "$FLOWS" ] || [ "$ROOT_DIR/flows.json" -nt "$FLOWS" ]; then
  cp -f "$ROOT_DIR/flows.json" "$FLOWS"
  echo "[init] copied flows.json -> $FLOWS"
fi

# Check that the local Node-RED dependencies are installed.
if [ ! -d "$ROOT_DIR/node_modules/node-red" ]; then
  echo "[init] node_modules was not found. Running npm install..."
  npm install --no-audit --no-fund
fi

echo ""
echo "╔════════════════════════════════════════════════════════════╗"
echo "║   s2s-reasoning-engine  —  Local Node-RED v5              ║"
echo "╠════════════════════════════════════════════════════════════╣"
echo "║   Editor:   http://localhost:${PORT}/                      ║"
echo "║   API:      http://localhost:${PORT}/api/reasoning         ║"
echo "║   UserDir:  ${USERDIR}"
echo "║   LogLevel: ${NODE_RED_LOG_LEVEL}"
echo "╚════════════════════════════════════════════════════════════╝"
echo ""

# ----------------------------------------------------------
# 3) Start Node-RED
# ----------------------------------------------------------
exec "$ROOT_DIR/node_modules/.bin/node-red" \
  --userDir "$USERDIR" \
  --settings "$SETTINGS" \
  --port "$PORT"