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

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/runtime-lib.sh"

TOKEN="${MYNETSPEEDER_RELAY_TCP_TOKEN:-${1:-}}"
LISTEN_HOST="${MYNETSPEEDER_RELAY_TCP_HOST:-0.0.0.0}"
LISTEN_PORT="${MYNETSPEEDER_RELAY_TCP_PORT:-9009}"
INSTALL_DIR="${MYNETSPEEDER_INSTALL_DIR:-/opt/mynetspeeder}"
INSTALL_PARENT="$(dirname "$INSTALL_DIR")"
PACKAGE_NAME="$(basename "$INSTALL_DIR")"
RUNTIME_USER="${MYNETSPEEDER_RELAY_TCP_USER:-mynetspeeder}"
PID_FILE="/var/run/mynetspeeder-relay-tcp.pid"
LOG_FILE="/var/log/mynetspeeder-relay-tcp.log"

require_root

if [[ -z "$TOKEN" ]]; then
  echo "missing tcp relay token"
  exit 1
fi
if ! [[ "$LISTEN_PORT" =~ ^[0-9]+$ ]]; then
  echo "listen port must be numeric"
  exit 1
fi

ensure_runtime_user "$RUNTIME_USER"
ensure_log_file "$LOG_FILE" "$RUNTIME_USER"
stop_pid_file "$PID_FILE" "relay-tcp --listen-host ${LISTEN_HOST} --listen-port ${LISTEN_PORT} --token ${TOKEN}"

ARGV_JSON="$(python3 - <<'PY' "$PACKAGE_NAME" "$LISTEN_HOST" "$LISTEN_PORT" "$TOKEN"
import json, sys
package_name, listen_host, listen_port, token = sys.argv[1:]
print(json.dumps([
    "python3", "-m", package_name, "relay-tcp",
    "--listen-host", listen_host,
    "--listen-port", listen_port,
    "--token", token,
]))
PY
)"

start_python_service "$RUNTIME_USER" "$INSTALL_PARENT" "$INSTALL_PARENT" "$LOG_FILE" "$PID_FILE" \
  "relay-tcp --listen-host ${LISTEN_HOST} --listen-port ${LISTEN_PORT} --token ${TOKEN}" "$ARGV_JSON" >/dev/null

if ! wait_for_tcp_listen "$LISTEN_HOST" "$LISTEN_PORT" 15; then
  tail -n 50 "$LOG_FILE" || true
  stop_pid_file "$PID_FILE" "relay-tcp --listen-host ${LISTEN_HOST} --listen-port ${LISTEN_PORT} --token ${TOKEN}"
  exit 1
fi

echo "tcp relay started on ${LISTEN_HOST}:${LISTEN_PORT}"