#!/usr/bin/env bash

source /etc/profile

pid=0
JVM_ARGS=" -Xms3g -Xmx3g -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+UseCMSInitiatingOccupancyOnly -Xloggc:/home/data1/gc.log -XX:+PrintGCDetails"
PACKAGE_NAME="daedalus-server.jar"
BACK_NAME="${PACKAGE_NAME}.back"
BUILD_NAME="${PACKAGE_NAME}.build"

JAVA_HOME="/usr/local/jdk1.8.0_65"

if [ -d "${JAVA_HOME}" ]; then
  JAVA_COMMAND=${JAVA_HOME}/bin/java
else
  JAVA_COMMAND=java
fi

if [ ${2}x = "test"x -o ${2}x = "pre"x ]; then
  JVM_ARGS="${JVM_ARGS} -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,address=8983,suspend=n"
fi

if [ "${2}"x = "test"x -o "${2}"x = "prod"x -o "${2}"x = "dev"x -o "${2}"x = "pre"x ]; then
  PROFILE=$2
else
  PROFILE="test"
fi

function checkProfile() {
  local cluster_file=".deploy/service.cluster.txt"
  if [ -f "$cluster_file" ]; then
    cluster=$(cat ${cluster_file})
    if [[ $cluster =~ "-pre" ]]; then
      PROFILE="pre"
      JVM_ARGS="${JVM_ARGS} -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,address=8010,suspend=n"
    else
      PROFILE="prod"
    fi
  else
    echo "not found cluster file"
  fi
}

start() {
  cp ${BUILD_NAME} ${PACKAGE_NAME}
  checkPid
  if [ "${pid}"x != "0"x ]; then
    echo "please do not repeat "
    return 1
  fi
  checkJava
  if [ "${pid}"x != "0"x ]; then
    echo "please do not repeat "
    return 1
  fi

  echo "starting java process"
  checkProfile
  echo "current profile:"${PROFILE}
  nohup ${JAVA_COMMAND} -jar ${JVM_ARGS} -Dspring.profiles.active=${PROFILE} ${PACKAGE_NAME} >/dev/null 2>&1 &
  sleep 1s
  healthCheck
  return $?
}

stop() {
  cp ${PACKAGE_NAME} ${BACK_NAME}
  apiShutdown=false
  result=$(curl -s --connect-timeout 3 -m 3 -X POST 'http://127.0.0.1:8080/shutdown')
  if [ "$?"x = "0"x -a "${result}"x = "{\"eventContext\":\"Shutting down, bye...\"}"x ]; then
    echo "shutdown api call success, server return :${result}"
    apiShutdown=true
    for ((i = 1; i < 60; i++)); do
      checkPid
      if [ "${pid}"x != "0"x ]; then
        echo "server ${pid} is running, waiting to shutdown"
        sleep 1s
        continue
      else
        checkJava
        if [ "${pid}"x != "0"x ]; then
          echo "server ${pid} is running,waiting to shutdown "
          sleep 1s
          continue
        else
          echo "server is shutdown success"
          return 0
        fi

      fi
    done
  else
    echo "server shutdown interface is closed,check pid"
    checkPid
    if [ "${pid}"x != "0"x ]; then
      echo "server is running,kill process ${pid}"
      kill -9 "${pid}"
      rm -fr app.pid
      return 0
    fi
    echo "pid not exist check java process"
    checkJava
    if [ "${pid}"x != "0"x ]; then
      echo "process is running,kill process ${pid}"
      kill -9 "${pid}"
      rm -fr app.pid
      return 0
    fi
    echo "no process is running,nothing need stop"
    return 0
  fi
}

checkJava() {
  v_pid=$(pgrep -f "${PACKAGE_NAME}" | head -1)
  if [ "${v_pid}"x = x ]; then
    echo "java process is shutdown"
    pid=0
  else
    echo "java process is running pid:${v_pid}"
    echo "${v_pid}" >app.pid
    pid=$((v_pid))
  fi
}

checkPid() {
  if [ -f "app.pid" ]; then
    v_pid=$(head -1 app.pid)
    if [ "${v_pid}"x = "0"x ]; then
      pid=0
    else
      ps -ax | awk '{ print $1 }' | grep -e "^${v_pid}$" >/dev/null
      if [ "$?" = "0" ]; then
        echo "pid<${v_pid}> process is running"
        pid=$((v_pid))
      else
        echo "pid<${v_pid}> is not running"
        echo "clean app.pid"
        rm -fr app.pid
        pid=0
      fi
    fi
  else
    pid=0
  fi
}

healthCheck() {
  echo "starting health check......"
  sleep 1s
  for ((i = 1; i <= 60; i++)); do
    result=$(curl -s --connect-timeout 1 -m 1 -X GET 'http://127.0.0.1:8080/health')
    if [ "$?" = 0 -a "${result}"x = "{\"status\":\"UP\"}"x ]; then
      echo ""
      echo "system start up success"
      return 0
    else
      sleep 1s
      echo -e " ${i}\c"
    fi
  done
  echo ""
  echo "system start failed"
  exit 1
}

reload() {
  checkProfile
  stop
  start
  exit $?
}

case $1 in
start)
  start
  ;;
stop)
  stop
  ;;
reload)
  reload
  ;;
healthCheck)
  healthCheck
  ;;
*)
  echo "arg start|stop|reload|healthCheck"
  ;;
esac
exit $?