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

APP_PUBLIC_PORT="${APP_PUBLIC_PORT:-8080}"
APP_FRONTEND_PORT="${APP_FRONTEND_PORT:-3000}"
APP_BACKEND_PORT="${APP_BACKEND_PORT:-18080}"
NANOBOT_HOME="${NANOBOT_HOME:-/root/.nanobot}"
NANOBOT_AUTH_FILE="${NANOBOT_AUTH_FILE:-$NANOBOT_HOME/web_auth_users.json}"

log() {
  printf '[app-instance] %s\n' "$*"
}

require_file() {
  local path="$1"
  local message="$2"
  if [[ ! -f "$path" ]]; then
    printf '[app-instance] %s: %s\n' "$message" "$path" >&2
    exit 1
  fi
}

cleanup() {
  local status=$?

  if [[ -n "${NGINX_PID:-}" ]]; then
    kill "${NGINX_PID}" 2>/dev/null || true
  fi
  if [[ -n "${FRONTEND_PID:-}" ]]; then
    kill "${FRONTEND_PID}" 2>/dev/null || true
  fi
  if [[ -n "${BACKEND_PID:-}" ]]; then
    kill "${BACKEND_PID}" 2>/dev/null || true
  fi

  wait 2>/dev/null || true
  exit "$status"
}

trap cleanup EXIT INT TERM

mkdir -p "$NANOBOT_HOME" "$NANOBOT_HOME/workspace"

require_file "$NANOBOT_HOME/config.json" "Missing nanobot config"
require_file "$NANOBOT_AUTH_FILE" "Missing web auth users file"

export NANOBOT_AUTH_FILE
export PORT="$APP_FRONTEND_PORT"
export HOSTNAME="127.0.0.1"

log "starting backend on 127.0.0.1:${APP_BACKEND_PORT}"
nanobot web --host 127.0.0.1 --port "$APP_BACKEND_PORT" &
BACKEND_PID=$!

log "starting frontend on 127.0.0.1:${APP_FRONTEND_PORT}"
(
  cd /opt/app/frontend
  node server.js
) &
FRONTEND_PID=$!

log "starting nginx on 0.0.0.0:${APP_PUBLIC_PORT}"
nginx -c /opt/app/nginx.conf -g 'daemon off;' &
NGINX_PID=$!

wait -n "$BACKEND_PID" "$FRONTEND_PID" "$NGINX_PID"