#!/usr/bin/with-contenv bashio
# shellcheck shell=bash
export LOG_FD

# Netclient has no queryable status socket, so this treats the app as:
# - healthy while it is still trying to join (within HEALTHCHECK_RESTART_TIMEOUT)
# - healthy once it has joined a network and the daemon process is running
# - unhealthy if it never manages to join within HEALTHCHECK_RESTART_TIMEOUT

# Redirect outputs to the log (&1 and &2 are not initialized by Docker)
exec &> /proc/1/fd/1
if [[ "${LOG_FD:-}" =~ ^[0-9]+$ ]]; then
  eval "exec ${LOG_FD}>&1" || true
fi

readonly HEALTHCHECK_RESTART_TIMEOUT=3600  # 1 hour
readonly NODES_FILE="/etc/netclient/nodes.json"

# STARTED_TIMESTAMP is stored in contenv at /var/run/s6/container_environment
if ! bashio::var.has_value "${STARTED_TIMESTAMP-}"; then
  STARTED_TIMESTAMP=$(date +"%s")
  printf "%s" "${STARTED_TIMESTAMP}" > /var/run/s6/container_environment/STARTED_TIMESTAMP
fi

# Healthy as soon as we are joined to at least one network.
if bashio::fs.file_exists "${NODES_FILE}" \
  && jq --exit-status 'length > 0' "${NODES_FILE}" > /dev/null 2>&1; then
  exit 0
fi

# Not joined yet: stay healthy during the initial window, then fail so the
# container is restarted.
if (( $(date +"%s") - STARTED_TIMESTAMP > HEALTHCHECK_RESTART_TIMEOUT )); then
  bashio::exit.nok "netclient has not joined a network within the expected time"
fi