#!/bin/bash

# kf2-srv is a command line tool for managing a set of Killing Floor 2 servers.
# Copyright (C) 2019, 2020 GenZmeY
# mailto: genzmey@gmail.com
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

source /etc/steamcmd/steamcmd.conf

ScriptFullname=$(readlink -e "$0")
ScriptName=$(echo "$ScriptFullname" | awk -F '/' '{print $NF;}')
ScriptVersion="0.8.0"

AppServerNum="232130"
AppClientNum="232090"
StrangeConstUID="17825793"

DiffArray=('Normal' 'Hard' 'Suicide' 'Hell')
WaveArray=('4' '7' '10')
declare -A ModeArray
ModeArray['KFGameContent.KFGameInfo_Survival']='Survival'
ModeArray['KFGameContent.KFGameInfo_WeeklySurvival']='Weekly'
ModeArray['KFGameContent.KFGameInfo_Endless']='Endless'
ModeArray['KFGameContent.KFGameInfo_Objective']='Objective'
ModeArray['KFGameContent.KFGameInfo_VersusSurvival']='Versus'

function show_help ()
{
#	echo "TODO: English description"
	echo "$ScriptName v$ScriptVersion"
	echo "Централизование управление серверами Killing Floor 2"
	echo "Usage:"
	echo "${ScriptName}           OPTIONS   stable branch"
	echo "${ScriptName}-beta      OPTIONS   beta branch"
	echo ""
	echo "Mandatory arguments to long options are mandatory for short options too."
	echo "  -n, --new       INSTANCE  создает новый ЭКЗЕМПЛЯР сервера"
	echo "  -d, --delete   [INSTANCE] удаляет указанный ЭКЗМПЛЯР сервера; если"
	echo "                            ЭКЗЕМПЛЯР не указан, удаляет все сервера"
	echo "  -s, --status   [INSTANCE] отображает состояние указанного ЭКЗЕМПЛЯРА"
	echo "                            сервера; если ЭКЗЕМПЛЯР не указан,"
	echo "                            отображает состояние всех экземпляров сервера"
	echo "  -u, --update              при первом запуске производит установку KF2;"
	echo "                            в дальнейшем устанавливает обновления при их" 
	echo "                            наличии"
	echo "  -v, --validate            проверяет целостность файлов, при"
	echo "                            необходимости перекачивает их."
	echo "  -r, --run      [OPTIONS]  запускает экземпляр сервера с указанными"
	echo "                            ПАРАМЕТРАМИ"
	echo " -st, --start    [INSTANCE] запускает указанный ЭКЗЕМПЛЯР сервера; если"
	echo "                            ЭКЗЕМПЛЯР не указан, запускает все"
	echo "                            автозапускаемые экземпляры сервера"
	echo " -sp, --stop     [INSTANCE] останавливает указанный ЭКЗЕМПЛЯР сервера;"
	echo "                            если ЭКЗЕМПЛЯР не указан, останавливает все"
	echo "                            экземпляры сервера"
	echo " -rs, --restart  [INSTANCE] перезапускает указанный ЭКЗЕМПЛЯР сервера;"
	echo "                            если ЭКЗЕМПЛЯР не указан, перезапускает"
	echo "                            все автозапускаемые экземпляры сервера"
	echo " -en, --enable   [INSTANCE] добавляет указанный ЭКЗЕМПЛЯР сервера в"
	echo "                            автозапуск; если ЭКЗЕМПЛЯР не указан,"
	echo "                            добавляет все экземпляры сервера в автозапуск"
	echo " -di, --disable  [INSTANCE] удаляет указанный ЭКЗЕМПЛЯР сервера из"
	echo "                            автозапуска; если ЭКЗЕМПЛЯР не указан,"
	echo "                            удаляет все экземпляры сервера из автозапуска"
	echo " -wl, --workshop-list       отображает список ресурсов из SteamWorkshop"
	echo " -wa, --workshop-add [MAP_ID] добавляет ресурс из SteamWorkshop по URL или"
	echo "                            WorkshopID"
	echo " -wd, --workshop-del [MAP_ID] удаляет ресурс SteamWorkshop по URL или WorkshopID"
	echo " -ws, --workshop-sync       синхронизирует списки сторонних карт в"
	echo "                            конфигурационных файлах с имеющимися файлами"
	echo "                            сторонних карт; синхронизирует списки карт из"
	echo "                            SteamWorkshop между всеми экземплярами серверов"
	echo "-mrs, --map-rotate-save [INSTANCE] сохраняет текущий порядок карт для"
	echo "                            указанного ЭКЗЕМПЛЯРА сервера; если ЭКЗЕМПЛЯР"
	echo "                            не указан, сохраняет порядок для всех ЭКЗЕМПЛЯРОВ"
	echo "-mrl, --map-rotate-load [INSTANCE] применяет ранее сохраненный порядок карт"
	echo "                            для указанного ЭКЗЕМПЛЯРА сервера; если ЭКЗЕМПЛЯР"
	echo "                            не указан, применяет сохраненные порядки для"
	echo "                            всех ЭКЗЕМПЛЯРОВ сервера"
	echo " -bl, --ban-list            отображает список заблокированных пользователей"
	echo " -bs, --ban-sync            синхронизирует список заблокированных"
	echo "                            пользователей между всеми экземплярами сервера"
	echo " -ba, --ban-add    [BAN_ID] добавляет пользователя в список заблокированных"
	echo "                            допустимо использовать ID3, SteamID, а также"
	echo "                            ссылку на профиль пользователя"
	echo " -bd, --ban-del    [BAN_ID] удаляет пользователя из списка заблокированных"
	echo "                            допустимо использовать ID3, SteamID, а также"
	echo "                            ссылку на профиль пользователя"
	echo "  -h, --help                display this help and exit"
}
	 
# Use this function with non-root user only!!!
function run_as_root () # $*: Args
{
	if [[ -n "$BetaPostfix" ]]; then
		BetaPostfix="beta"
	fi
        
	if [[ -n $(groups "$USER" | grep -Fo 'wheel') ]]; then
		sudo "$ScriptFullname" $BetaPostfix $*
	else
		echo "You must be root or sudo-user to run this command."
		return 1
	fi
}

function service_name () # $*: Instance[s]
{
	local Services=""
	for Instance in $*
	do
		Services+=" kf2-srv$BetaPostfix@$Instance.service"
	done
	echo "$Services"
}

function show_instances ()
{
	find "$InstanceConfigDir" -maxdepth 1 -mindepth 1 -type d -printf "%f\n"
}

function show_enabled_instances ()
{
	local EnabledInstances=""
	for Instance in $(show_instances)
	do
		if systemctl -q is-enabled $(service_name "$Instance") ; then
			EnabledInstances+=" $Instance"
		fi
	done
	echo "$EnabledInstances"
}

function instance_exists () # $1: Instance
{
	if [[ -d "$InstanceConfigDir/$1" ]]; then
		return 0
	else
		return 1
	fi
}

function server_exists ()
{
	if [[ -x "$AppBin" ]]; then
		return 0
	else
		return 1
	fi
}

function updates_aviable ()
{
	return 0 # steamcmd does not show updates even if they are :(
	# TODO: check updates correctly (but how?)
	if [[ -n "$BetaPostfix" ]]; then
		local BetaArg="-beta preview"
	fi
	if steamcmd +login anonymous \
				+force_install_dir $InstallDir \
				+app_info_update 1 \
				+app_status $AppServerNum $BetaArg \
				+quit | \
				grep 'install state:' | \
				grep -qiF 'Update Required'; then
		return 0
	else
		return 1
	fi
}

function new_instance () # $*: InstanceName[s]
{
	if [[ -z "$*" ]]; then
		echo "Name of instance[s] must be set"
		exit 1
	elif ! server_exists; then
		echo "You must install server first"
		echo "Run \"$ScriptName --update\" to install it"
		exit 1
	fi
	
	local MaxGamePort='7777'
	local MaxQueryPort='27015'
	local MaxWebAdminPort='8080'
	for Instance in $(show_instances)
	do
		local Config="$InstanceConfigDir/$Instance/main.conf"
		local GamePort=$(grep -Po '"-port=([0-9]+)' "$Config" | grep -Po '[0-9]+$')
		local WebAdminPort=$(grep -Po '"-webadminport=([0-9]+)' "$Config" | grep -Po '[0-9]+$')
		local QueryPort=$(grep -Po '"-queryport=([0-9]+)' "$Config" | grep -Po '[0-9]+$')
		if [[ "$GamePort" -gt "$MaxGamePort" ]]; then MaxGamePort="$GamePort"; fi
		if [[ "$QueryPort" -gt "$MaxQueryPort" ]]; then MaxQueryPort="$QueryPort"; fi
		if [[ "$WebAdminPort" -gt "$MaxWebAdminPort" ]]; then MaxWebAdminPort="$WebAdminPort"; fi
	done
	
	for Instance in $*
	do
		if instance_exists "$Instance"; then
			echo "Instance $Instance already exists - skip"
			continue
		fi

		local InstanceDir="$InstanceConfigDir/$Instance"
		
		local DirMode="-d -g $SteamUser -o $SteamUser -m 775"
		local FileMode="  -g $SteamUser -o $SteamUser -m 664"
		
		install $DirMode "$InstanceDir"
		install $DirMode "$InstanceDir/LinuxServer"

		install $FileMode "$MainConfigTemplate"                                         "$InstanceDir/main.conf"
		install $FileMode "$DefaultConfigDir/KFAI.ini"                                  "$InstanceDir"
		install $FileMode "$DefaultConfigDir/KFWeb.ini"                                 "$InstanceDir"
		install $FileMode "$DefaultConfigDir/LinuxServer-KFEngine.ini"                  "$InstanceDir"
		install $FileMode "$DefaultConfigDir/LinuxServer-KFGame.ini"                    "$InstanceDir"
		install $FileMode "$DefaultConfigDir/LinuxServer-KFInput.ini"                   "$InstanceDir"
		install $FileMode "$DefaultConfigDir/LinuxServer-KFSystemSettings.ini"          "$InstanceDir"
		install $FileMode "$DefaultConfigDir/LinuxServer/LinuxServerEngine.ini"         "$InstanceDir/LinuxServer"
		install $FileMode "$DefaultConfigDir/LinuxServer/LinuxServerGame.ini"           "$InstanceDir/LinuxServer"
		install $FileMode "$DefaultConfigDir/LinuxServer/LinuxServerInput.ini"          "$InstanceDir/LinuxServer"
		install $FileMode "$DefaultConfigDir/LinuxServer/LinuxServerSystemSettings.ini" "$InstanceDir/LinuxServer"
		
		((MaxGamePort++)); ((MaxQueryPort++)); ((MaxWebAdminPort++))
		
		sed -i -r --follow-symlinks "s/-port=[0-9]+/-port=$MaxGamePort/g"                     "$InstanceDir/main.conf"
		sed -i -r --follow-symlinks "s/-queryport=[0-9]+/-queryport=$MaxQueryPort/g"          "$InstanceDir/main.conf"
		sed -i -r --follow-symlinks "s/-webadminport=[0-9]+/-webadminport=$MaxWebAdminPort/g" "$InstanceDir/main.conf"

		echo "Instance $Instance created. See /etc/$ScriptName/instances$BetaPostfix/$Instance for edit configuration"
	done
}

function delete_instance () # $*: [InstanceName[s]]
{
	if [[ -z "$*" ]]; then
		echo "Are you sure you want to delete all instances? [y/N]"
		local Answ="N"
		read Answ
		if [[ "$Answ" == "y" || "$Answ" == "Y" ]]; then
			for Instance in $(show_instances)
			do
				stop_instance "$Instance"
				delete_instance "$Instance"
			done
		fi
	else
		for Instance in $*
		do 
			if instance_exists "$Instance"; then
				local InstanceDir="$InstanceConfigDir/$Instance"
				stop_instance "$Instance"
				rm -rf "$InstanceDir"
				echo "Instance $Instance removed"
			else
				echo "Instance $Instance not exists"
			fi
		done
	fi
}

function show_status_implementation_body () # $*: [InstanceName[s]]
{
	for Instance in $InstanceList
	do
		if systemctl -q is-enabled $(service_name "$Instance"); then
			local IsEnabled="enabled"
		else
			local IsEnabled="disabled"
		fi
		if systemctl | grep $(service_name "$Instance") | grep -q 'running' ; then
			local IsRuning="running"
		else
			local IsRuning="stopped"
		fi
		
		local Description=$(grep -P 'Description=' "$InstanceConfigDir/$Instance/main.conf" | sed -r 's/(Description=|")//g')
		local GamePort=$(grep -Po '"-port=([0-9]+)' "$InstanceConfigDir/$Instance/main.conf" | grep -Po '[0-9]+$')
		local WebAdminPort=$(grep -Po '"-webadminport=([0-9]+)' "$InstanceConfigDir/$Instance/main.conf" | grep -Po '[0-9]+$')
		local QueryPort=$(grep -Po '"-queryport=([0-9]+)' "$InstanceConfigDir/$Instance/main.conf" | grep -Po '[0-9]+$')
		local GameType=$(grep -Po 'Game=([^\?]+)' "$InstanceConfigDir/$Instance/main.conf" | sed -r 's/Game=([^?]+)/\1/g' )
		local GameLength=$(grep -Po 'GameLength=([0-9]+)' "$InstanceConfigDir/$Instance/main.conf" | grep -Po '[0-9]+$')
		local GameDifficulty=$(grep -Po 'Difficulty=([0-9]+)' "$InstanceConfigDir/$Instance/main.conf" | grep -Po '[0-9]+$')
		
		local DisplayGameType=${ModeArray[$GameType]}
		local DisplayGameLength=${WaveArray[$GameLength]}
		local DisplayDifficulty=${DiffArray[$GameDifficulty]}
		
		if [[ "$DisplayGameType" == 'Weekly' || \
			  "$DisplayGameType" == 'Endless' || \
			  "$DisplayGameType" == 'Versus' || \
			  "$DisplayGameType" == 'Objective' ]]; then
			DisplayGameLength='-'
		fi
		
		if [[ "$DisplayGameType" == 'Weekly' || \
			  "$DisplayGameType" == 'Versus' ]]; then
			DisplayDifficulty='-'
		fi
		
		echo -e "$Instance:$IsEnabled:$IsRuning:$GamePort:$QueryPort:$WebAdminPort:$DisplayGameType:$DisplayGameLength:$DisplayDifficulty:$Description"
	done
}

function show_status_implementation_full () # $*: [InstanceName[s]]
{
	local InstanceList=""
	if [[ -z "$*" ]] ; then
		InstanceList=$(show_instances)
	else
		for Instance in $*
		do
			if instance_exists "$Instance"; then
				InstanceList+=" $Instance" 
			fi
		done
	fi
	
	echo -e "INSTANCE:AUTORUN:STATE:P_GAME:P_QUERY:P_WEB:TYPE:LEN:DIFF:DESCRIPTION"
	show_status_implementation_body "$InstanceList" | sort -t : -k 4
}

function show_status () # $*: [InstanceName[s]]
{
	show_status_implementation_full $* | column -t -s :
}

function validate ()
{
	if [[ -n "$BetaPostfix" ]]; then
		local BetaArg="-beta preview"
	fi
	stop_instance
	steamcmd +login $SteamLogin +force_install_dir $InstallDir +app_update $AppServerNum $BetaArg validate +exit
	fix_steamclient_so
	start_instance
}

function make_default_instance ()
{
	local InstanceDir="$InstanceConfigDir/default"

	chmod 664                                                     \
	"$DefaultConfigDir/KFAI.ini"                                  \
	"$DefaultConfigDir/KFWeb.ini"                                 \
	"$DefaultConfigDir/LinuxServer-KFEngine.ini"                  \
	"$DefaultConfigDir/LinuxServer-KFGame.ini"                    \
	"$DefaultConfigDir/LinuxServer-KFInput.ini"                   \
	"$DefaultConfigDir/LinuxServer-KFSystemSettings.ini"          \
	"$DefaultConfigDir/LinuxServer/LinuxServerEngine.ini"         \
	"$DefaultConfigDir/LinuxServer/LinuxServerGame.ini"           \
	"$DefaultConfigDir/LinuxServer/LinuxServerInput.ini"          \
	"$DefaultConfigDir/LinuxServer/LinuxServerSystemSettings.ini"
	
	dos2unix                                                      \
	"$DefaultConfigDir/KFAI.ini"                                  \
	"$DefaultConfigDir/KFWeb.ini"                                 \
	"$DefaultConfigDir/LinuxServer-KFEngine.ini"                  \
	"$DefaultConfigDir/LinuxServer-KFGame.ini"                    \
	"$DefaultConfigDir/LinuxServer-KFInput.ini"                   \
	"$DefaultConfigDir/LinuxServer-KFSystemSettings.ini"          \
	"$DefaultConfigDir/LinuxServer/LinuxServerEngine.ini"         \
	"$DefaultConfigDir/LinuxServer/LinuxServerGame.ini"           \
	"$DefaultConfigDir/LinuxServer/LinuxServerInput.ini"          \
	"$DefaultConfigDir/LinuxServer/LinuxServerSystemSettings.ini"
	
	install -d -g "$SteamUser" -o "$SteamUser" -m 775 "$InstanceDir"
	install -d -g "$SteamUser" -o "$SteamUser" -m 775 "$InstanceDir/LinuxServer"
	install    -g "$SteamUser" -o "$SteamUser" -m 664 "$MainConfigTemplate" "$InstanceDir/main.conf"
	ln -s "$DefaultConfigDir/KFAI.ini"                                      "$InstanceDir/KFAI.ini"
	ln -s "$DefaultConfigDir/KFWeb.ini"                                     "$InstanceDir/KFWeb.ini"
	ln -s "$DefaultConfigDir/KFWebAdmin.ini"                                "$InstanceDir/KFWebAdmin.ini"
	ln -s "$DefaultConfigDir/LinuxServer-KFEngine.ini"                      "$InstanceDir/LinuxServer-KFEngine.ini"
	ln -s "$DefaultConfigDir/LinuxServer-KFGame.ini"                        "$InstanceDir/LinuxServer-KFGame.ini"
	ln -s "$DefaultConfigDir/LinuxServer-KFInput.ini"                       "$InstanceDir/LinuxServer-KFInput.ini"
	ln -s "$DefaultConfigDir/LinuxServer-KFSystemSettings.ini"              "$InstanceDir/LinuxServer-KFSystemSettings.ini"
	ln -s "$DefaultConfigDir/LinuxServer/LinuxServerEngine.ini"             "$InstanceDir/LinuxServer/LinuxServerEngine.ini"
	ln -s "$DefaultConfigDir/LinuxServer/LinuxServerGame.ini"               "$InstanceDir/LinuxServer/LinuxServerGame.ini"
	ln -s "$DefaultConfigDir/LinuxServer/LinuxServerInput.ini"              "$InstanceDir/LinuxServer/LinuxServerInput.ini"
	ln -s "$DefaultConfigDir/LinuxServer/LinuxServerSystemSettings.ini"     "$InstanceDir/LinuxServer/LinuxServerSystemSettings.ini"
}

function fix_steamclient_so ()
{
	rm -f "$InstallDir/linux64/steamclient.so"
	rm -f "$InstallDir/steamclient.so"
	rm -f "$InstallDir/Binaries/Win64/lib64/steamclient.so"
	ln -s "/usr/share/steamcmd/linux64/steamclient.so" "$InstallDir/linux64/steamclient.so"
	ln -s "/usr/share/steamcmd/linux64/steamclient.so" "$InstallDir/steamclient.so"
	ln -s "/usr/share/steamcmd/linux64/steamclient.so" "$InstallDir/Binaries/Win64/lib64/steamclient.so"
}

function create_map_dirs () 
{
	# space saving
	local InstallDirOrig="/usr/games/kf2-srv"
	local InstallDirBeta="/usr/games/kf2-srv-beta"
	local DownloadDirOrig="$InstallDirOrig/Binaries/Win64/steamapps/workshop/content/$AppClientNum"
	local CacheDirOrig="$InstallDirOrig/KFGame/Cache"
	local DownloadDirBeta="$InstallDirBeta/Binaries/Win64/steamapps/workshop/content/$AppClientNum"
	local CacheDirBeta="$InstallDirBeta/KFGame/Cache"
	
	if [[ -z "$BetaPostfix" ]]; then # Orig
		sudo -u "$SteamUser" install -d -m 775 "$DownloadDirOrig"
		if [[ -d "$CacheDirBeta" ]]; then
			ln -s "$CacheDirBeta" "$CacheDirOrig"
			rm -rf "$DownloadDirOrig"
			ln -s "$DownloadDirBeta" "$DownloadDirOrig"
		else
			sudo -u "$SteamUser" install -d -m 775 "$CacheDirOrig"
		fi
	else # Beta
		sudo -u "$SteamUser" install -d -m 775 "$DownloadDirBeta"
		if [[ -d "$CacheDirOrig" ]]; then
			ln -s "$CacheDirOrig" "$CacheDirBeta"
			rm -rf "$DownloadDirBeta"
			ln -s "$DownloadDirOrig" "$DownloadDirBeta"
		else
			sudo -u "$SteamUser" install -d -m 775 "$CacheDirBeta"
		fi
	fi
}

function update_kf2 ()
{
	if [[ -n "$BetaPostfix" ]]; then
		local BetaArg="-beta preview"
	fi
	if ! server_exists; then # First install
		if ! steamcmd +login $SteamLogin +force_install_dir $InstallDir +app_update $AppServerNum $BetaArg validate +exit; then
			echo "Errors during installation - exit"
			exit 1
		fi
		sudo -u "$SteamUser" $AppBin &
		while true
		do
			if [[ -e "$DefaultConfigDir/KFAI.ini" ]] &&
			   [[ -e "$DefaultConfigDir/KFWeb.ini" ]] &&
			   [[ -e "$DefaultConfigDir/LinuxServer-KFEngine.ini" ]] &&
			   [[ -e "$DefaultConfigDir/LinuxServer-KFGame.ini" ]] &&
			   [[ -e "$DefaultConfigDir/LinuxServer-KFInput.ini" ]] &&
			   [[ -e "$DefaultConfigDir/LinuxServer-KFSystemSettings.ini" ]] &&
			   [[ -e "$DefaultConfigDir/LinuxServer/LinuxServerEngine.ini" ]] &&
			   [[ -e "$DefaultConfigDir/LinuxServer/LinuxServerGame.ini" ]] &&
			   [[ -e "$DefaultConfigDir/LinuxServer/LinuxServerInput.ini" ]] &&
			   [[ -e "$DefaultConfigDir/LinuxServer/LinuxServerSystemSettings.ini" ]]; then
			   	break
			fi
			sleep 2
		done
		killall -KILL KFGameSteamServer.bin.x86_64
		multini -s "$DefaultConfigDir/KFWeb.ini" "IpDrv.WebServer" "bEnabled" "true"
		create_map_dirs
		fix_steamclient_so
		ln -s "$InstanceConfigDir" "$InstanceConfigLnk"
		make_default_instance
		echo "KF2 succesfully installed"
	elif updates_aviable; then # Update
		stop_instance
		steamcmd +login $SteamLogin +force_install_dir $InstallDir +app_update $AppServerNum $BetaArg +exit
		start_instance
	fi
}

function start_instance () # $*: [InstanceName[s]]
{
	local InstanceList="$*"
	if [[ -z "$InstanceList" ]] ; then
		InstanceList=$(show_enabled_instances)
	fi
	
	local InactiveServiceList=""
	for Instance in $InstanceList
	do
		if instance_exists "$Instance"; then
			local Service=$(service_name "$Instance")
			if systemctl -q is-active $Service ; then
				echo "Instance $Instance already running - skip"
			else
				InactiveServiceList+=" $Service"
			fi
		else
			echo "Instance $Instance not exitst"
		fi
	done
	
	if [[ -n "$InactiveServiceList" ]]; then
		systemctl start $InactiveServiceList
	else
		echo "Nothing to do"
	fi
}

function stop_instance () # $*: [InstanceName[s]]
{
	local InstanceList="$*"
	if [[ -z "$InstanceList" ]] ; then
		InstanceList=$(show_instances)
	fi
	
	local ToStopInstanceList=""
	for Instance in $InstanceList
	do
		if instance_exists "$Instance"; then
			ToStopInstanceList+=" $Instance"
		else
			echo "Instance $Instance not exitst"
		fi
	done
	
	if [[ -n "$ToStopInstanceList" ]]; then
		systemctl stop $(service_name "$ToStopInstanceList")
	else
		echo "Nothing to do"
	fi
}

function restart_instance () # $*: [InstanceName[s]]
{
	local InstanceList="$*"
	if [[ -z "$InstanceList" ]] ; then
		InstanceList=$(show_enabled_instances)
	fi
	
	local ToRestartInstancesList=""
	for Instance in $InstanceList
	do
		if instance_exists "$Instance"; then
			ToRestartInstancesList+=" $Instance"
		else
			echo "Instance $Instance not exitst"
		fi
	done
	
	if [[ -n "$ToRestartInstancesList" ]]; then
		systemctl restart $(service_name "$ToRestartInstancesList")
	else
		echo "Nothing to do"
	fi
}

function enable_instance () # $1*: [InstanceName[s]]
{
	local InstanceList="$*"
	if [[ -z "$InstanceList" ]] ; then
		InstanceList=$(show_instances)
	fi
	
	local ToEnableInstanceList=""
	for Instance in $InstanceList
	do
		if instance_exists "$Instance"; then
			ToEnableInstanceList+=" $Instance"
		else
			echo "Instance $Instance not exist"
		fi
	done
	
	if [[ -n "$ToEnableInstanceList" ]]; then
		systemctl enable $(service_name "$ToEnableInstanceList")
	else
		echo "Nothing to do"
	fi
}

function disable_instance () # $*: [InstanceName[s]]
{
	local InstanceList="$*"
	if [[ -z "$InstanceList" ]] ; then
		InstanceList=$(show_instances)
	fi
	
	local ToDisableInstanceList=""
	for Instance in $InstanceList
	do
		if instance_exists "$Instance"; then
			ToDisableInstanceList+=" $Instance"
		else
			echo "Instance $Instance not exitst"
		fi
	done
	
	if [[ -n "$ToDisableInstanceList" ]]; then
		systemctl disable $(service_name "$ToDisableInstanceList")
	else
		echo "Nothing to do"
	fi
}

function run ()
{
	if [[ "$USER" == "$SteamUser" ]]; then
		"$AppBin" $*
	elif [[ -n $(groups "$USER" | grep -Fo 'wheel') ]] || [[ "$EUID" -eq 0 ]]; then
		sudo -u "$SteamUser" "$AppBin" $*
	else
		echo "You must be a $SteamUser, root or sudo-user to run this command."
	fi
}

function name_by_workshopID () # $1: WorkshopID
{
	local WorkshopID="$1"
	local Cache="$CacheDir/$WorkshopID"
	local Result=""
	if [[ -d "$Cache" ]]; then
		Result=$(find "$Cache" -type f -name '*.kfm' -printf '%f\n' | head -n 1)
		if [[ -z "$Result" ]]; then
			Result=$(find "$Cache" -type f -name '*.u' -printf '%f\n' | head -n 1)
		fi
	fi
	echo "$Result"
}

function workshop_list_body () # $1: WorkshopListFile
{
	while read WorkshopID
	do
		local Cache="$CacheDir/$WorkshopID"
		local Downl="$DownloadDir/$WorkshopID"
		local Url="https://steamcommunity.com/sharedfiles/filedetails/?id=$WorkshopID"
		local WsName=$(name_by_workshopID "$WorkshopID")
		if [[ -n "$WsName" ]]; then
			local WsSize=$(du -sch "$Downl" "$Cache" | tail -n 1 | grep -Po '^[^\s]+')
		else
			local WsSize="-"; WsName="-"
		fi
		echo "$WorkshopID $WsName $WsSize $Url"
	done < "$1"
}

function workshop_list_full () # $1: WorkshoplistFile
{
	echo "WORKSHOP_ID NAME SIZE WORKSHOP_URL"
	workshop_list_body "$1" | sort -k 2
}

function workshop_list () # $1: [--human-readable]
{
	local WsList=$(mktemp)
	for Instance in $(show_instances)
	do
		local Config="$InstanceConfigDir/$Instance/LinuxServer-KFEngine.ini"
		if multini -gq "$Config" "OnlineSubsystemSteamworks.KFWorkshopSteamworks" "ServerSubscribedWorkshopItems"; then
			multini -g "$Config" "OnlineSubsystemSteamworks.KFWorkshopSteamworks" "ServerSubscribedWorkshopItems" >> "$WsList"
		fi
	done
	sort -u "$WsList" -o "$WsList"
	if [[ -n "$1" ]]; then
		workshop_list_full "$WsList" | column -t
	else
		cat "$WsList"
	fi
	rm -f "$WsList"
}

function any_to_workshopID () # $1: WorkshopID/URL
{
	if echo "$1" | grep -qP '^http.+'; then
		local WorkshopID=$(echo "$1" | sed -r 's/.+=([0-9]+)$/\1/') 
	else
		local WorkshopID="$1"
	fi
	echo "$WorkshopID"
}

function workshop_add () # $*: WorkshopID[s]
{
	for Instance in $(show_instances)
	do
		local Config="$InstanceConfigDir/$Instance/LinuxServer-KFEngine.ini"
		multini -ar "$Config" "IpDrv.TcpNetDriver" "DownloadManagers" "OnlineSubsystemSteamworks.SteamWorkshopDownload"
		for Map in $*
		do
			local WorkshopID=$(any_to_workshopID "$Map")
			if ! multini -gq "$Config" "OnlineSubsystemSteamworks.KFWorkshopSteamworks" "ServerSubscribedWorkshopItems" "$WorkshopID"; then
				echo "Add workshop $WorkshopID to $Instance"
				multini -ar "$Config" "OnlineSubsystemSteamworks.KFWorkshopSteamworks" "ServerSubscribedWorkshopItems" "$WorkshopID"
			fi
		done
	done
}

function workshop_del () # $*: WorkshopID[s]
{
	for Map in $*
	do
		local WorkshopID=$(any_to_workshopID "$Map")
		local WsName=$(name_by_workshopID "$WorkshopID")
		local Cache="$CacheDir/$WorkshopID"
		local Downl="$DownloadDir/$WorkshopID"
		echo -e "Clear cache:
$Cache
$Downl"
		rm -rf "$Cache" "$Downl"
		for Instance in $(show_instances)
		do
			local ConfigEngine="$InstanceConfigDir/$Instance/LinuxServer-KFEngine.ini"
			multini -d "$ConfigEngine" "OnlineSubsystemSteamworks.KFWorkshopSteamworks" "ServerSubscribedWorkshopItems" "$WorkshopID"
			if echo "$WsName" | grep -qP '\.kfm$' ; then
				echo "Remove map $WorkshopID ($WsName) from $Instance"
				local WsNameShort=$(echo "$WsName" | sed 's/\.kfm$//')
				local ConfigGame="$InstanceConfigDir/$Instance/LinuxServer-KFGame.ini"
				multini -d "$ConfigGame" "$WsNameShort KFMapSummary"
			fi
		done 
	done
}

function workshop_sync ()
{
	workshop_add $(workshop_list)
	
	for Instance in $(show_instances)
	do
		if instance_exists "$Instance"; then
			local Config="$InstanceConfigDir/$Instance/LinuxServer-KFGame.ini"
			for MapFile in $(find -L "$CacheDir" -type f -name '*.kfm' -printf "%f\n")
			do
				MapName=$(echo "$MapFile" | sed -r 's|.kfm$||')
				if ! multini -gq "$Config" "$MapName KFMapSummary"; then
					echo "Adding $MapName to $Instance."
					multini -s "$Config" "$MapName KFMapSummary" "MapName" "$MapName"
					multini -s "$Config" "$MapName KFMapSummary" "bPlayableInSurvival"   "True"
					multini -s "$Config" "$MapName KFMapSummary" "bPlayableInWeekly"     "True"
					multini -s "$Config" "$MapName KFMapSummary" "bPlayableInVsSurvival" "True"
					multini -s "$Config" "$MapName KFMapSummary" "bPlayableInEndless"    "True"
					multini -s "$Config" "$MapName KFMapSummary" "bPlayableInObjective"  "False"
				fi
			done
			for MutFile in $(find -L "$CacheDir" -type f -name '*.u' -printf "%f\n")
			do
				MutName=$(echo "$MutFile" | sed -r 's|.u$||')
				if ! multini -gq "$Config" "$MutName KFMutatorSummary"; then
					echo "Adding $MutName to $Instance."
					multini -s "$Config" "$MutName KFMutatorSummary" "ClassName" ""
				fi
			done
		else
			echo "Instance $Instance not exitst"
		fi
	done
}

function map_rotate_save () # $*: Instance[s]
{
	local InstanceList="$*"
	if [[ -z "$InstanceList" ]] ; then
		InstanceList=$(show_instances)
	fi
	
	for Instance in $InstanceList
	do
		if instance_exists "$Instance"; then
			local Config="$InstanceConfigDir/$Instance/LinuxServer-KFGame.ini"
			local MapRotate="$InstanceConfigDir/$Instance/MapRotate.ini"
			grep -F 'ActiveMapCycle=' "$Config" > "$MapRotate"
			grep -F 'GameMapCycles=' "$Config" >> "$MapRotate"
		else
			echo "Instance $Instance not exitst"
		fi
	done
}

function map_rotate_load () # $*: Instance[s]
{
	local InstanceList="$*"
	if [[ -z "$InstanceList" ]] ; then
		InstanceList=$(show_instances)
	fi
	
	for Instance in $InstanceList
	do
		if instance_exists "$Instance"; then	
			local Config="$InstanceConfigDir/$Instance/LinuxServer-KFGame.ini"
			local MapRotate="$InstanceConfigDir/$Instance/MapRotate.ini"
			if [[ -e "$MapRotate" ]]; then
				sed -i --follow-symlinks -r "/(ActiveMapCycle=|GameMapCycles=)/d" "$Config"
				sed -i --follow-symlinks "/\[KFGame\.KFGameInfo\]/ r $MapRotate" "$Config"
			else
				echo "$MapRotate not found - skip"
			fi
		else
			echo "Instance $Instance not exitst"
		fi
	done
}

# conversion algorithm taken from here:
# https://github.com/noobient/killinuxfloor/blob/master/share/killinuxfloor
# thank bviktor for that :)
function steamID3_to_steamID64 () # $1: ID3
{
    # steamID64 = "7656" + (steamID3 + 1197960265728)
    ID64=$1
    ((ID64+=1197960265728))
    ID64="7656${ID64}"
    echo "$ID64"
}

function steamID64_to_steamID3 () # $1: ID4
{
    # steamID3 = substr(steamID64, 4) - 1197960265728
    ID3=${1:4}
    ((ID3-=1197960265728))
    echo "$ID3"
}

function ban_list_ext () # $1: BanlistFile
{
	local Num=1
	echo "NUM STEAM_ID3 STEAM_ID64 PROFILE_URL"
	while read ID3
	do
		local ID64=$(steamID3_to_steamID64 "$ID3")
		local Url=$(curl "https://steamcommunity.com/profiles/$ID64" -s -L -I -o /dev/null -w '%{url_effective}')
		echo "$Num $ID3 $ID64 $Url"
		((Num++))
	done < "$1"
}

function ban_list () # $1: [--human-readable]
{
	local BanList=$(mktemp)
	for Instance in $(show_instances)
	do
		local Config="$InstanceConfigDir/$Instance/LinuxServer-KFGame.ini"
		if multini -gq "$Config" "Engine.AccessControl" "BannedIDs"; then
			multini -g "$Config" "Engine.AccessControl" "BannedIDs" | sed -r 's/.+A=([0-9]+),.+/\1/' >> "$BanList"
		fi
	done
	sort -u "$BanList" -o "$BanList"
	if [[ -n "$1" ]]; then
		ban_list_ext "$BanList" | column -t
	else
		cat "$BanList"
	fi
	rm -f "$BanList"
}

function ban_ID3 () # $1: ID3
{
	ID3="$1"
	for Instance in $(show_instances)
	do
		local Config="$InstanceConfigDir/$Instance/LinuxServer-KFGame.ini"
		local BanStr="(Uid=(A=$ID3,B=$StrangeConstUID))"
		if ! multini -gq "$Config" "Engine.AccessControl" "BannedIDs" "$BanStr"; then
			echo "Add ban $ID3 to $Instance"
			multini -a "$Config" "Engine.AccessControl" "BannedIDs" "$BanStr"
		fi
	done 
}

function unban_ID3 () # $1: ID3
{
	ID3="$1"
	for Instance in $(show_instances)
	do
		local Config="$InstanceConfigDir/$Instance/LinuxServer-KFGame.ini"
		local BanStr="(Uid=(A=$ID3,B=$StrangeConstUID))"
		if multini -gq "$Config" "Engine.AccessControl" "BannedIDs" "$BanStr"; then
			echo "Remove ban $ID3 from $Instance"
			multini -d "$Config" "Engine.AccessControl" "BannedIDs" "$BanStr"
		fi
	done 
}

function any_to_ID3 () # $1: ID3/ID64/Url
{
	if echo "$1" | grep -qP '^http.+'; then
		local Xml=$(mktemp)
		curl -ss "$1/?xml=1" > "$Xml"
		local ID64=$(xmllint --xpath 'string(//steamID64/text())' "$Xml")
		local ID3=$(steamID64_to_steamID3 "$ID64") 
		rm -f "$Xml"
	elif [[ $(echo "$1" | wc -m) -eq 18 ]] && echo "$1" | grep -qP '^76561[0-9]+' ; then
		local ID3=$(steamID64_to_steamID3 "$1")
	else
		local ID3="$1"
	fi
	echo "$ID3"
}

function ban_add () # $*: ban list
{
	if [[ -z "$*" ]]; then
		echo "Nothing to do"
		exit 1
	fi
	
	for Ban in $*
	do
		ban_ID3 $(any_to_ID3 "$Ban")
	done
}

function ban_del () # $*: ban list
{
	if [[ -z "$*" ]]; then
		echo "Nothing to do"
		exit 1
	fi
	
	for Ban in $*
	do
		unban_ID3 $(any_to_ID3 "$Ban")
	done
}

function ban_sync ()
{
	ban_list | \
	while read ID3
	do
		ban_ID3 "$ID3"
	done
}

if [[ "$1" == "beta" ]]; then
	BetaPostfix="-beta"; shift
fi

InstallDir="/usr/games/kf2-srv$BetaPostfix"
AppBin="$InstallDir/Binaries/Win64/KFGameSteamServer.bin.x86_64"
DefaultConfigDir="$InstallDir/KFGame/Config"
DownloadDir="$InstallDir/Binaries/Win64/steamapps/workshop/content/$AppClientNum"
CacheDir="$InstallDir/KFGame/Cache"
InstanceConfigDir="/etc/kf2-srv/instances$BetaPostfix"
InstanceConfigLnk="$DefaultConfigDir/instances"
MainConfigTemplate="/etc/kf2-srv/main.conf.template"

if [[ $# -eq 0 ]]; then show_help; exit 0; fi
case $1 in
	  -h|--help            )                                     show_help;                                   ;;
	  -n|--new             ) if [[ "$EUID" -eq 0 ]]; then shift; new_instance     $*; else run_as_root $*; fi ;;
	  -d|--delete          ) if [[ "$EUID" -eq 0 ]]; then shift; delete_instance  $*; else run_as_root $*; fi ;;
	  -s|--status          )                              shift; show_status      $*;                         ;;
	  -u|--update          ) if [[ "$EUID" -eq 0 ]]; then        update_kf2         ; else run_as_root $*; fi ;;
	  -v|--validate        ) if [[ "$EUID" -eq 0 ]]; then        validate           ; else run_as_root $*; fi ;;
	  -r|--run             )                              shift; run              $*;                         ;;
	 -st|--start           ) if [[ "$EUID" -eq 0 ]]; then shift; start_instance   $*; else run_as_root $*; fi ;;
	 -sp|--stop            ) if [[ "$EUID" -eq 0 ]]; then shift; stop_instance    $*; else run_as_root $*; fi ;;
	 -rs|--restart         ) if [[ "$EUID" -eq 0 ]]; then shift; restart_instance $*; else run_as_root $*; fi ;;
	 -en|--enable          ) if [[ "$EUID" -eq 0 ]]; then shift; enable_instance  $*; else run_as_root $*; fi ;;
	 -di|--disable         ) if [[ "$EUID" -eq 0 ]]; then shift; disable_instance $*; else run_as_root $*; fi ;;
	 -wl|--workshop-list   ) if [[ "$EUID" -eq 0 ]]; then shift; workshop_list "-h" ; else run_as_root $*; fi ;;
	 -wa|--workshop-add    ) if [[ "$EUID" -eq 0 ]]; then shift; workshop_add     $*; else run_as_root $*; fi ;;
	 -wd|--workshop-del    ) if [[ "$EUID" -eq 0 ]]; then shift; workshop_del     $*; else run_as_root $*; fi ;;
	 -ws|--workshop-sync   ) if [[ "$EUID" -eq 0 ]]; then shift; workshop_sync      ; else run_as_root $*; fi ;;
	-mrs|--map-rotate-save ) if [[ "$EUID" -eq 0 ]]; then shift; map_rotate_save  $*; else run_as_root $*; fi ;;
	-mrl|--map-rotate-load ) if [[ "$EUID" -eq 0 ]]; then shift; map_rotate_load  $*; else run_as_root $*; fi ;;
	 -bl|--ban-list        ) if [[ "$EUID" -eq 0 ]]; then shift; ban_list "-h"      ; else run_as_root $*; fi ;;
	 -bs|--ban-sync        ) if [[ "$EUID" -eq 0 ]]; then shift; ban_sync           ; else run_as_root $*; fi ;;
	 -ba|--ban-add         ) if [[ "$EUID" -eq 0 ]]; then shift; ban_add          $*; else run_as_root $*; fi ;;
	 -bd|--ban-del         ) if [[ "$EUID" -eq 0 ]]; then shift; ban_del          $*; else run_as_root $*; fi ;;
	    *                  ) echo "Command not recognized: $1"; exit 1                                        ;;
esac