#!/bin/bash

printf "Better to run as root, because of permisions handeling.\n"

sleep 2


### RAM ###

printf "How much of RAM are you willing to allocate in GB (Max) [4G/?G]: \n"
read maxRam

printf "How little you want to let RAM go down to in GB (Min) [1G/?G]: \n"
read minRam

### Proxy ###

printf "Are you planing to use Velocity proxy to acces this server? [Y/n]: \n"
read ansVeloProxy

if [[ "$ansVeloProxy" =~ ("y"|"Y") || -z $ansVeloProxy ]]; then
	
	printf "Do you wish to set up moder forwarding? [Y/n]: \n"
	read ansModernFarward
fi

printf "Do you want to set up SkinRestorer [Y/n]: \n"
read ansSkinRestorer


printf "Do you want to set up PlayerSync [Y/n]: \n"
read ansPlayerSync

sleep 2

### Update ###

printf "\n+ Starting to upgrade base system\n\n"

apt update
apt upgrade -y
apt autoremove --purge -y


### Installing depandencies ###

#TODO Tailscale tunel?

printf "\n+ Installing depandencies \n\n" 
 apt install openjdk-21-jre-headless screen p7zip-full -y


### User and groupe managment ###

printf "\n+ Creating user minecraft and basic file structure"
groupadd minecraft

useradd --system --shell /usr/sbin/nologin --home /opt/minecraft -g minecraft minecraft

###  File strukture ###
mkdir /opt/minecraft 

cd /opt/minecraft/

### Download forge server ###
printf "+ Downloading and installing Forge 1.21.1 \n \n"

wget https://maven.neoforged.net/releases/net/neoforged/neoforge/21.1.217/neoforge-21.1.217-installer.jar

mv *neoforge*. NeoForge.jar

### Installing server ###

java -Xms512M -Xmx2048M -jar NeoForge.jar --installServer

### RAM configuration ###

if [[ "$minRam" > "$maxRam" ]]; then
	pritf "\n You allocated too low max ram or too much min ram. Manual intervention at the end will be needed\n"
	echo "-Xmx?G # in place of ? put number of RAM you want to set ass maximum"
	$maxRam="Error"
elif [[ "$maxRam" =~ ("G"|"M") ]]; then
	printf "\n+ Allocating $maxRam as RAM maximum."
	echo "-Xmx$maxRam" >> user_jvm_args.txt
elif [[ -z $maxRam ]]; then
	$maxRam=4G
	printf "\n+ Allocating $MaxRam as RAM maximum"
	echo "-Xmx$maxRam" >> user_jvm_args.txt
elif [[ ! "$maxRam" =~ ("G"|"MB") ]]; then
	printf "\n+ Allocating ${maxRam}G as RAM maximum"
	echo "-Xmx${maxRam}G" >> user_jvm_args.txt
else
	pritnf "\n \n!!! Sorry I have no idea what are you trying to do :/ Manual intervention will be needed at the end \n"
	$maxRam="Error"
	echo "-Xmx?G # in place of ? put number of RAM you want to set ass maximum"
fi


if [[ "$minRam" > "$maxRam" ]]; then
	echo "-Xms?G # in place of ? put number of RAM you want to se ass minimum"
elif [[ "$minRam" =~ ("G"|"M") ]]; then
	printf "\n+ Allocating $minRam as RAM minimum."
	echo "-Xms$minRam" >> user_jvm_args.txt
elif [[ -z $minRam ]]; then
	$minRam=1G
	printf "\n+ Allocating $minRam as RAM minimum"
	echo "-Xms$minRam" >> user_jvm_args.txt
elif [[ ! "$minRam" =~ ("G"|"MB") ]]; then
	printf "Allocating ${minRam}G as RAM maximum"
	echo "-Xms${minRam}G" >> user_jvm_args.txt
else
	pritnf "\n!!! Sorry I have no idea what are you trying to do :/ Manual intervention will be needed at the end \n"
	$minRam="Error"
	echo "-Xms?G # in place of ? put number of RAM you want to set ass minimum"
fi

### Other configuraton ###
echo eula=true > eula.txt

cd -
cd data/
mv server-icon.png server.properties /opt/minecraft/
cd /opt/minecraft/

### Mods handling ###
mkdir /opt/minecraft/mods

printf "\n+ Unpacking mods \n \n"

#TODO Not like this, what about to downlad them
cd -
cd data
7z x Mods.zip -o/opt/minecraft/mods/
cd /opt/minecraft/

#		TODO neoforge now
## adds mode to help comunicate with VeloProxy
#if [[ "$ansVeloProxy" =~ ["y"|"Y"] || -z $ansVeloProxy ]]; then
#	wget https://cdn.modrinth.com/data/vDyrHl8l/versions/jfiEc2mQ/proxy-compatible-forge-1.1.7.jar
#	mv proxy-compatible-forge*.jar /opt/minecraft/mods/
#
#	if [[ "$ansModernFarward" =~ ["y"|"Y"] || -z $ansModernFarward ]]; then
#		mkdir /opt/minecraft/config
#		mv data/pcf-common.toml /opt/minecraft/config/ #TODO Research this shit
#	fi
#fi
#
## adds aditional mods
#if [[ "$ansSkinRestorer" =~ ["y"|"Y"] || -z $ansSkinRestorer ]]; then
#	wget https://mediafilez.forgecdn.net/files/6897/64/skinrestorer-2.4.3%2B1.21-forge.jar
#	mv skinrestorer*.jar /opt/minecraft/mods/
#fi
#
#if [[ "$ansPlayerSync" =~ ["y"|"Y"] || -z $ansPlayerSync ]]; then
#	cd -
#		# Not using wget because of castom modification to this mod
#	mv data/playersync-1.21.1.jar /opt/minecraft/mods 
#	cd /opt/minecarft/
#	# TODO what abou configuration of this?
#fi
#

### Permisions ###
printf "\n+ Permision handeling\n"
chown -R minecraft:minecraft /opt/minecraft

### SystemD service ###
printf "+ Preparign systemD service\n"
mv data/mc-forge.service /etc/systemd/system/

systemctl daemon-reload


  ### Error handeling ###
if [[ "$minRam" = "Error" || "$maxRam" = "Error" ]]; then

	printf "\n Encountred some eror in Ram settings"
	printf "\n Manual configuration needed" 
	printf "\n Open /opt/minecraft/user_jvm_args.txt in your favorite editor. File contains more instructions"

else
	
	printf "Do you want to start server right now? [Y/n]: \n"
	read startServer

	if [[ "$startServer" =~ ("y"|"Y") || -z $startServer ]]; then
		systemctl start mc-forge.serice
	fi
	
	systemctl enable mc-forge

fi

printf "\n+ Done, thanks for your time. It is goode idea to chack if everythink is alright by running:"
printf "\nsystemctl status mc-forge"
printf "\nsu minecraft -s /bin/bash"
printf "\n+ it is good idea to have some fun with screen before trying to open minecraft conesole 'screen -r' while loged wia minecraft user"