#!/usr/bin/env bash
# ---------------------------------------------------------------
# Shared helpers for OPC UA discovery integration tests.
#
# Source this file from test scripts:
#   source "$(dirname "$0")/test_helpers.sh"
# ---------------------------------------------------------------

FAILURES=0

# Waits up to 5 seconds for a process to listen on a TCP port.
# Exits immediately if the process dies before the port opens.
#
#   wait_for_port <port> <pid> <label>
wait_for_port() {
  local port="$1" pid="$2" label="$3" i=0
  while [ $i -lt 50 ]; do
    if ! kill -0 "$pid" 2>/dev/null; then
      echo "FAIL: $label exited prematurely"
      exit 1
    fi
    if ss -tlnp 2>/dev/null | grep -q ":${port} "; then
      return 0
    fi
    sleep 0.1
    i=$((i + 1))
  done
  echo "FAIL: $label did not listen on port $port within 5 s"
  exit 1
}

# Records a PASS/FAIL result.  Increments FAILURES on failure.
#
#   check <label> <exit-code>
check() {
  local label="$1" result="$2"
  if [ "$result" -eq 0 ]; then
    echo "PASS: $label"
  else
    echo "FAIL: $label"
    FAILURES=$((FAILURES + 1))
  fi
}

# Asserts that the given TCP ports are not already in use.
# Exits immediately if any port is occupied.
#
#   assert_ports_free <port> [port...]
assert_ports_free() {
  for port in "$@"; do
    if ss -tlnp 2>/dev/null | grep -q ":${port} "; then
      echo "FAIL: port $port is already in use"
      exit 1
    fi
  done
}