#!/usr/bin/env bash

unset -v progname
progname="${0##*/}"

unset -f msg err

msg() {
   case $# in
   [1-9]*)
      echo "${progname}: $*" >&2
      ;;
   esac
}

err() {
   local code
   code="${1}"
   shift 1
   msg "$@"
   exit "${code}"
}

# https://www.linuxjournal.com/content/validating-ip-address-bash-script
function valid_ip()
{
  local  ip=$1
  local  stat=1

  if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
    OIFS=$IFS
    IFS='.'
    ip=($ip)
    IFS=$OIFS
    [[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
      && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
    stat=$?
  fi
  return $stat
}

function myip() {
# get ipv4 address only, right now only support ipv4 addresses
   PUB_IP=$(dig -4 @resolver1.opendns.com ANY myip.opendns.com +short)
   if valid_ip $PUB_IP; then
      msg "public IP address autodetected: $PUB_IP"
   else
      err 1 "NO valid public IP found: $PUB_IP"
   fi
}

function add_env
{
   filename=$1
   shift
   grep -qxF "$@" $filename || echo "$@" >> $filename
}

function setup_env
{
   sysctl -w net.core.somaxconn=1024
   sysctl -w net.core.netdev_max_backlog=65536
   sysctl -w net.ipv4.tcp_tw_reuse=1
   sysctl -w net.ipv4.tcp_rmem='4096 65536 16777216'
   sysctl -w net.ipv4.tcp_wmem='4096 65536 16777216'
   sysctl -w net.ipv4.tcp_mem='65536 131072 262144'

   add_env /etc/security/limits.conf "* soft     nproc          65535"
   add_env /etc/security/limits.conf "* hard     nproc          65535"
   add_env /etc/security/limits.conf "* soft     nofile         65535"
   add_env /etc/security/limits.conf "* hard     nofile         65535"
   add_env /etc/security/limits.conf "root soft     nproc          65535"
   add_env /etc/security/limits.conf "root hard     nproc          65535"
   add_env /etc/security/limits.conf "root soft     nofile         65535"
   add_env /etc/security/limits.conf "root hard     nofile         65535"
   add_env /etc/pam.d/common-session "session required pam_limits.so"
}

# find my public ip address
myip

# setup runtime environment
setup_env

keydir=/harmony/.hmy

args=(
      -log_folder "/harmony/log"
      -node_type "validator"
      -network_type "mainnet"
      -bootnodes "$NODE_BN_MNET"
      -ip "$PUB_IP"
      -port "$NODE_PORT"
      -dns_zone "$NODE_DNS_ZONE"
      -blspass "file:${keydir}/$NODE_BLSPASS"
      -blskey_file "${keydir}/$NODE_BLSKEY"
     )

if [ "$NODE_BLACKLIST" != "" ]; then
  args+=(
    -blacklist "$NODE_BLACKLIST"
    )
fi

if [ "$NODE_RPC" == "true" ]; then
  args+=(
    -public_rpc
  )
fi

msg "harmony ${args[@]}"
ls -al ${keydir}

harmony "${args[@]}"

# vim: ai ts=2 sw=2 et sts=2 ft=sh