#!/bin/bash -eu

set +u -o pipefail

checkEnvVar() {
  local envVar=${1}
  local msg=${2}
  local exitCode=${3}

  if [ -z "${envVar}" ]; then
    echo "${msg}"
    exit "${exitCode}"
  fi
}
# SystemD will do for the unit, decomment
#  for testing outside systemd
. /etc/sysconfig/keycloak

readonly KEYCLOAK_HOME={{ keycloak_jboss_home }}
readonly KEYCLOAK_BIND_ADDRESS=${KEYCLOAK_BIND_ADDRESS}
readonly KEYCLOAK_HTTP_PORT=${KEYCLOAK_HTTP_PORT}
readonly KEYCLOAK_HTTPS_PORT=${KEYCLOAK_HTTPS_PORT}
readonly KEYCLOAK_MANAGEMENT_HTTP_PORT=${KEYCLOAK_MANAGEMENT_HTTP_PORT}
readonly KEYCLOAK_MANAGEMENT_HTTPS_PORT=${KEYCLOAK_MANAGEMENT_HTTPS_PORT}
readonly KEYCLOAK_LOGFILE={{ keycloak_service_logfile }}
readonly KEYCLOAK_PIDFILE={{ keycloak_service_pidfile }}

set -u
if [ ! -d "${KEYCLOAK_HOME}" ]; then
  echo "KEYCLOAK_HOME (${KEYCLOAK_HOME}) is not a director or does not exists."
  exit 1
fi

checkEnvVar "${KEYCLOAK_PIDFILE}" 'KEYCLOAK_PIDFILE not provided' 2

getKeycloakPID() {

  local pid
  if [ -e "${KEYCLOAK_PIDFILE}" ]; then
    cat "${KEYCLOAK_PIDFILE}"
  fi
}

statusKeycloak() {

  if [ "$(isKeyCloakRunning)" -eq 1 ]; then
    echo "Keycloak is running (PID:$(getKeycloakPID ))"
  else
    echo "Keycloak is NOT running."
  fi
}

isKeyCloakRunning() {
  set +e
  local statusKeycloak=0
  local pid=$(getKeycloakPID )
  if [ -n "${pid}" ]; then
    kill -0 "${pid}" 2> /dev/null
    if [ "${?}" -eq 0 ]; then
      statusKeycloak=1
    fi
  fi
  set -e
  echo "${statusKeycloak}"
}

startKeycloak() {
  checkEnvVar "${KEYCLOAK_BIND_ADDRESS}" 'KEYCLOAK_BIND_ADDRESS not provided' 2
  checkEnvVar "${KEYCLOAK_HTTP_PORT}"    'KEYCLOAK_HTTP_PORT not provided' 4
  checkEnvVar "${KEYCLOAK_HTTPS_PORT}"   'KEYCLOAK_HTTPS_PORT not provided' 5
  checkEnvVar "${KEYCLOAK_MANAGEMENT_HTTP_PORT}" 'KEYCLOAK_MANAGEMENT_HTTP_PORT not provided' 6
  checkEnvVar "${KEYCLOAK_MANAGEMENT_HTTPS_PORT}" 'KEYCLOAK_MANAGEMENT_HTTPS_PORT not provided' 7
  checkEnvVar "${KEYCLOAK_LOGFILE}" 'KEYCLOAK_LOGFILE not provided' 8

  if [ "$(isKeyCloakRunning)" -eq 1 ]; then
    statusKeycloak
  else
    ${KEYCLOAK_HOME}/bin/standalone.sh \
	-Djboss.bind.address=${KEYCLOAK_BIND_ADDRESS} \
	-Djboss.http.port=${KEYCLOAK_HTTP_PORT} \
	-Djboss.https.port=${KEYCLOAK_HTTPS_PORT} \
	-Djboss.management.http.port=${KEYCLOAK_MANAGEMENT_HTTP_PORT} \
	-Djboss.management.https.port=${KEYCLOAK_MANAGEMENT_HTTPS_PORT} \
	-Djboss.node.name={{ inventory_hostname }} {% if ansible_facts.virtualization_type in ['docker','containerd'] %}-Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true {% endif %}\
    2>&1 >> "${KEYCLOAK_LOGFILE}" &
    echo "${!}" > "${KEYCLOAK_PIDFILE}"
  fi
}

stopKeycloak() {
  local pid=$(getKeycloakPID)
  if [ -n "${pid}" ]; then
    set +e
    kill ${pid} 2> /dev/null
    kill -0 "${pid}" 2> /dev/null
#    if [ "${?}" -eq 0 ]; then
#      sleep 5
#      kill -9 "${pid}" > /dev/null
#    fi
    set -e
    deletePidFile
  fi
}

deletePidFile() {
  rm -f "${KEYCLOAK_PIDFILE}"
}

case "$1" in
    start)
      startKeycloak
      ;;
    stop)
      stopKeycloak
      ;;
    restart)
      stopKeycloak
      startKeycloak
      ;;
    status)
      statusKeycloak
      ;;
    *)
      echo "usage: $0 start|stop|restart" >&2
      exit 1
       ;;
esac