#!/bin/bash

TMP_FOLDER=$(mktemp -d)
CONFIG_FILE='Olympic.conf'
CONFIGFOLDER='/root/.Olympic'
COIN_DAEMON='/usr/local/bin/Olympicd'
COIN_CLI='/usr/local/bin/Olympicd'
COIN_REPO='https://github.com/OlympicCoinTeam/OlympicCoin/releases/download/v4.1.0.2/Olympicd'
COIN_NAME='Olympic'
COIN_BLOCK='https://github.com/OlympicCoinTeam/OlympicCoin/releases/download/v4.1.0.2/bootstrap.zip'
COIN_PORT=26667
RPC_PORT=26666

NODEIP=$(curl -s4 api.ipify.org)


RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m'

function compile_node() {
  echo -e "Prepare to download $COIN_NAME"
  cd $TMP_FOLDER
  wget -q $COIN_REPO
  chmod +x Olympicd
  cp Olympicd /usr/local/bin
  cd -
  rm -rf $TMP_FOLDER >/dev/null 2>&1
  clear
}

function configure_systemd() {
  cat << EOF > /etc/systemd/system/$COIN_NAME.service
[Unit]
Description=$COIN_NAME service
After=network.target

[Service]
User=root
Group=root

Type=forking
#PIDFile=$CONFIGFOLDER/$COIN_NAME.pid

ExecStart=$COIN_DAEMON -daemon -conf=$CONFIGFOLDER/$CONFIG_FILE -datadir=$CONFIGFOLDER
ExecStop=-$COIN_CLI -conf=$CONFIGFOLDER/$CONFIG_FILE -datadir=$CONFIGFOLDER stop

Restart=always
PrivateTmp=true
TimeoutStopSec=60s
TimeoutStartSec=10s
StartLimitInterval=120s
StartLimitBurst=5

[Install]
WantedBy=multi-user.target
EOF

  systemctl daemon-reload
  sleep 3
  systemctl start $COIN_NAME.service
  systemctl enable $COIN_NAME.service >/dev/null 2>&1
}



function create_config() {
  mkdir $CONFIGFOLDER >/dev/null 2>&1
  RPCUSER=$(tr -cd '[:alnum:]' < /dev/urandom | fold -w12 | head -n1)
  RPCPASSWORD=$(tr -cd '[:alnum:]' < /dev/urandom | fold -w24 | head -n1)
  cat << EOF > $CONFIGFOLDER/$CONFIG_FILE
rpcuser=$RPCUSER
rpcpassword=$RPCPASSWORD
rpcallowip=127.0.0.1
rpcport=$RPC_PORT
listen=1
server=1
daemon=1
port=$COIN_PORT
EOF
}

function download_blocks() {
 echo -e "Syncing ${RED}$COIN_NAME${NC} block chain, it might take a while and the screen will not move."
 cd $CONFIGFOLDER >/dev/null 2>&1
 wget -q $COIN_BLOCK
 unzip -o bootstrap.zip >/dev/null 2>&1
 rm bootstrap.zip >/dev/null 2>&1
 cd - >/dev/null 2>&1
 clear
}

function create_key() {
  echo -e "Enter your ${RED}$COIN_NAME Masternode Private Key${NC}. Leave it blank to generate a new ${RED}Masternode Private Key${NC} for you:"
  read -e COINKEY
  if [[ -z "$COINKEY" ]]; then
  $COIN_DAEMON -daemon
  sleep 30
  if [ -z "$(ps axo cmd:100 | grep $COIN_DAEMON)" ]; then
   echo -e "${RED}$COIN_NAME server couldn not start. Check /var/log/syslog for errors.{$NC}"
   exit 1
  fi
  COINKEY=$($COIN_CLI masternode genkey)
  if [ "$?" -gt "0" ];
    then
    echo -e "${RED}Wallet not fully loaded. Let us wait and try again to generate the Private Key${NC}"
    sleep 30
    COINKEY=$($COIN_CLI masternode genkey)
  fi
  $COIN_CLI stop
fi
clear
}

function update_config() {
  sed -i 's/daemon=1/daemon=0/' $CONFIGFOLDER/$CONFIG_FILE
  cat << EOF >> $CONFIGFOLDER/$CONFIG_FILE
logintimestamps=1
maxconnections=256
masternode=1
#bind=$NODEIP
masternodeaddr=$NODEIP:$COIN_PORT
masternodeprivkey=$COINKEY
EOF
}


function enable_firewall() {
  echo -e "Installing and setting up firewall to allow ingress on port ${GREEN}$COIN_PORT${NC}"
  ufw allow $COIN_PORT/tcp >/dev/null 2>&1
  ufw allow $RPC_PORT/tcp >/dev/null 2>&1
  ufw allow ssh comment "SSH" >/dev/null 2>&1
  ufw limit ssh/tcp >/dev/null 2>&1
  ufw default allow outgoing >/dev/null 2>&1
  echo "y" | ufw enable >/dev/null 2>&1
}

function get_ip() {
  declare -a NODE_IPS
  for ips in $(netstat -i | awk '!/Kernel|Iface|lo/ {print $1," "}')
  do
    NODE_IPS+=($(curl --interface $ips --connect-timeout 2 -s4 api.ipify.org))
  done

  if [ ${#NODE_IPS[@]} -gt 1 ]
    then
      echo -e "${GREEN}More than one IP. Please type 0 to use the first IP, 1 for the second and so on...${NC}"
      INDEX=0
      for ip in "${NODE_IPS[@]}"
      do
        echo ${INDEX} $ip
        let INDEX=${INDEX}+1
      done
      read -e choose_ip
      NODEIP=${NODE_IPS[$choose_ip]}
  else
    NODEIP=${NODE_IPS[0]}
  fi
}


function compile_error() {
if [ "$?" -gt "0" ];
 then
  echo -e "${RED}Failed to compile $COIN_NAME. Please investigate.${NC}"
  exit 1
fi
}


function checks() {
if [[ $(lsb_release -d) != *16.04* ]]; then
  echo -e "${RED}You are not running Ubuntu 14.04. Installation is cancelled.${NC}"
  exit 1
fi

if [[ $EUID -ne 0 ]]; then
   echo -e "${RED}$0 must be run as root.${NC}"
   exit 1
fi

if [ -n "$(pidof $COIN_DAEMON)" ] || [ -e "$COIN_DAEMOM" ] ; then
  echo -e "${RED}$COIN_NAME is already installed.${NC}"
  exit 1
fi
}

function prepare_system() {
echo -e "Prepare the system to install ${GREEN}$COIN_NAME${NC} master node."
apt-get update >/dev/null 2>&1
DEBIAN_FRONTEND=noninteractive apt-get update >/dev/null 2>&1
DEBIAN_FRONTEND=noninteractive apt-get -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" -y -qq upgrade >/dev/null 2>&1
apt-get install -y software-properties-common >/dev/null 2>&1
echo -e "${GREEN}Adding bitcoin PPA repository"
apt-add-repository -y ppa:bitcoin/bitcoin >/dev/null 2>&1
echo -e "Installing required packages, it may take some time to finish.${NC}"
apt-get update >/dev/null 2>&1
apt-get install -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" make software-properties-common \
build-essential libtool autoconf libssl-dev libboost-dev libboost-chrono-dev libboost-filesystem-dev libboost-program-options-dev \
libboost-system-dev libboost-test-dev libboost-thread-dev sudo automake git wget curl libdb4.8-dev bsdmainutils libdb4.8++-dev \
libminiupnpc-dev libgmp3-dev ufw pkg-config libevent-dev unzip >/dev/null 2>&1
if [ "$?" -gt "0" ];
  then
    echo -e "${RED}Not all required packages were installed properly. Try to install them manually by running the following commands:${NC}\n"
    echo "apt-get update"
    echo "apt -y install software-properties-common"
    echo "apt-add-repository -y ppa:bitcoin/bitcoin"
    echo "apt-get update"
    echo "apt install -y make build-essential libtool software-properties-common autoconf libssl-dev libboost-dev libboost-chrono-dev libboost-filesystem-dev \
libboost-program-options-dev libboost-system-dev libboost-test-dev libboost-thread-dev sudo automake git pwgen curl libdb4.8-dev \
bsdmainutils libdb4.8++-dev libminiupnpc-dev libgmp3-dev ufw pkg-config libevent-dev unzip"
 exit 1
fi
}

function create_swap() {
PHYMEM=$(free -g|awk '/^Mem:/{print $2}')
SWAP=$(swapon -s)
if [[ "$PHYMEM" -lt "2" && -z "$SWAP" ]];
  then
    echo -e "${GREEN}Server is running with less than 2G of RAM, creating 2G swap file.${NC}"
    dd if=/dev/zero of=/swapfile bs=1024 count=2M
    chmod 600 /swapfile
    mkswap /swapfile
    swapon -a /swapfile
else
  echo -e "${GREEN}The server running with at least 2G of RAM, or SWAP exists.${NC}"
fi
clear
}


function important_information() {
 echo
 echo -e "================================================================================================================================"
 echo -e "$COIN_NAME Masternode is up and running listening on port ${RED}$COIN_PORT${NC}."
 echo -e "Configuration file is: ${RED}$CONFIGFOLDER/$CONFIG_FILE${NC}"
 echo -e "Start: ${RED}systemctl start $COIN_NAME.service${NC}"
 echo -e "Stop: ${RED}systemctl stop $COIN_NAME.service${NC}"
 echo -e "VPS_IP:PORT ${RED}$NODEIP:$COIN_PORT${NC}"
 echo -e "MASTERNODE PRIVATEKEY is: ${RED}$COINKEY${NC}"
 echo -e "Please check ${RED}$COIN_NAME${NC} is running with the following command: ${RED}systemctl status $COIN_NAME.service${NC}"
 echo -e "================================================================================================================================"
}

function setup_node() {
  get_ip
  create_config
  download_blocks
  create_key
  update_config
  enable_firewall
  important_information
  configure_systemd
}


##### Main #####
clear

checks
prepare_system
create_swap
compile_node
setup_node