#!/bin/bash

# Example of how to run this script -> sh start.sh 1 1024 20 192.168.1.100 2000
# And that means........
# Argument 1 = Hey0 Mod, Yes or No... 0 or 1
# Argument 2 = Amount of RAM to allocate to the Java Process (IN MB)
# Argument 3 = Maxium slots for the server
# Argument 4 = IP Address to run the server on
# Argument 5 = Port to run the server on
# ${user} = is passed by default, this is the user that runs the script.

# Setup Variables which are required in order to run the server.

if [ $# -ne 5 ]
then
    echo "Sorry but we're missing vital information to start the server."
    exit
fi


SERVER_MOD=$1
SERVER_MEM=$2
SERVER_SLOTS=$3
SERVER_IP=$4
SERVER_PORT=$5

SERVER_PROPERTIES=/home/${USER}/minecraft/server.properties
SERVER_TMP_PROPERTIES=${SERVER_PROPERTIES}.tmp

MC_PATH=/home/${USER}/minecraft/

touch ${MC_PATH}ONLINE-DONTDELETE #Create a file to say the server SHOULD be online.

server_launch() {

    sed '/max-players/d' ${SERVER_PROPERTIES} | sed '/server-port/d' | sed '/server-ip/d' > ${SERVER_TMP_PROPERTIES}

    echo max-players=${SERVER_SLOTS} >> ${SERVER_TMP_PROPERTIES}
    echo server-ip=${SERVER_IP} >> ${SERVER_TMP_PROPERTIES}
    echo server-port=${SERVER_PORT} >> ${SERVER_TMP_PROPERTIES}

    mv ${SERVER_TMP_PROPERTIES} ${SERVER_PROPERTIES}

    cd ${MC_PATH}

    case $SERVER_MOD in

        "1")
        echo "###############################################"
        echo "Starting Modded Server with" ${SERVER_MEM}"MB RAM"
        echo "###############################################"
        java -Xmx${SERVER_MEM}M -Xms${SERVER_MEM}M -Djava.net.preferIPv4Stack=true -jar Minecraft_Mod.jar nogui
        sleep 1
        ;;

        *)
        echo "#################################################"
        echo "Starting Standard Server with" ${SERVER_MEM}"MB RAM"
        echo "#################################################"
        java -Xmx${SERVER_MEM}M -Xms${SERVER_MEM}M -Djava.net.preferIPv4Stack=true -jar minecraft_server.jar nogui
        sleep 1
        ;;

    esac

}

server_launch

while [ -f ${MC_PATH}AUTORESTART-DONTDELETE ]
do
    server_launch
done

rm -f ${MC_PATH}ONLINE-DONTDELETE