#!/usr/bin/env bash

help="Usage: fcgi <ip or dns for check> <port> <check type, maybe ping or status> <parameter, only for status>\nExample: fcgi 127.0.0.1 3000 ping"

function ping {
  SCRIPT_NAME=/ping SCRIPT_FILENAME=/ping REQUEST_METHOD=GET cgi-fcgi -bind -connect $address:$port
}

function status {
  SCRIPT_NAME=/status SCRIPT_FILENAME=/status REQUEST_METHOD=GET cgi-fcgi -bind -connect $address:$port | sed -n "$1p;$1q" | awk -F: '{print $2}' | sed 's/^[ \t]*//;s/[ \t]*$//'
}

function status_clear {
  SCRIPT_NAME=/status SCRIPT_FILENAME=/status REQUEST_METHOD=GET cgi-fcgi -bind -connect $address:$port
}

address=$1
port=$2
parameter=$4

case "$3" in
  "ping" )
    ping | tail -n1
  ;;
  "status" )
    case "$parameter" in
      "pool" )
        status_clear | sed -n '6p;6q' | awk '{print $2}'
      ;;
      "version" )
        status_clear | sed -n '1p;1q' | awk -F/ '{print $2}'
      ;;
      "process_manager" )
        status 7
      ;;
      "accepted_conn" )
        status 10
      ;;
      "listen_queue" )
        status 11
      ;;
      "max_listen_queue" )
        status 12
      ;;
      "listen_queue_len" )
        status 13
      ;;
      "idle_processes" )
        status 14
      ;;
      "active_processes" )
        status 15
      ;;
      "total_processes" )
        status 16
      ;;
      "max_active_processes" )
        status 17
      ;;
      "max_children_reached" )
        status 18
      ;;
      "slow_requests" )
        status 19
      ;;
      "latency" )
        time=$(date +%s%N)
        ping >> /dev/null
        echo "$(( ($(date +%s%N)-$time) / 1000000 ))"
      ;;
      "all" )
        status_clear
      ;;
      * )
        echo -e "Bad command!\n$help"
      ;;
    esac
  ;;
  * )
  echo -e "Bad command $3!\n$help"
  ;;
esac