#!/bin/bash

# Config
SCRIPT_ROOT_PATH="/tmp/init-script"
VERTSYS_PATH="$SCRIPT_ROOT_PATH/verteilte-systeme-bsc-ai-examples/VerteilteSysteme-Examples/build/"
#JARS = "TCPServer.jar TCPServerMulti.jar UDPServer.jar UDPServerMulti.jar UDPTimeCounterServer.jar TCPPerfServer.jar"
JARS="TCPServer.jar TCPPerfServer.jar UDPServer.jar UDPTimeCounterServer.jar"
REPO="https://gogs.informatik.hs-fulda.de/srieger/verteilte-systeme-bsc-ai-examples.git"

# Create path to run the script and store the output
mkdir $SCRIPT_ROOT_PATH
cd $SCRIPT_ROOT_PATH
# fetch user-data (should be the content of this script itself ;)) to check and run it later again
wget http://169.254.169.254/latest/user-data
chmod +x user-data
wget http://169.254.169.254/latest/meta-data/placement/availability-zone
# setting console prompt to include location (availability zone and region in AWS)
echo "PS1='[\u@\h@\e[32m`cat /tmp/init-script/availability-zone`\e[32m \W]$ '" >>/root/.bashrc
echo "PS1='[\u@\h@\e[32m`cat /tmp/init-script/availability-zone`\e[39m \W]$ '" >>/home/ec2-user/.bashrc

# wait for internet connection, should not be necessary, but just in case ;)
while ! ping -c 1 -W 1 8.8.8.8; do
    echo "Waiting for 8.8.8.8 - network interface might be down..."
    sleep 1
done

echo "Installing packages..."
sudo yum update -y
sudo yum install -y java git
#rm -rf verteilte-systeme-bsc-ai-examples
if [ ! -d $VERTSYS_PATH ]; then
  echo "Cloning repo..."
  git clone $REPO
fi

# killall running screens if script is run again
killall screen
# start all jars
echo "Starting JARS: ${JARS}..."
for JAR in $JARS; do
  echo "Starting ${JAR}..."
  sudo screen -dmS $JAR -L java -jar $VERTSYS_PATH/$JAR
done

sleep 1

echo "Status:"
sudo netstat -taupen | grep 36[0,1][0-9][0-9]
sudo ps aux | grep java

# Example for path and contents:
#
# ./verteilte-systeme-bsc-ai-examples/VerteilteSysteme-Examples/build/
#
#build-server-jars.xml                TCPServerMulti.jar
#RMIEchoServer.jar                    UDPServer.jar
#RMIMandelbrotCalculationsServer.jar  UDPServerMulti.jar
#TCPPerfServer.jar                    UDPTimeCounterServer.jar
#TCPServer.jar