#!/bin/bash

declare BASE_URL=https://git.netm.ch/m/os-init/raw/branch/main
declare DIR_URL=ubuntu-20.04
declare IPV4=127.0.0.1
declare ISLXC=0

showHelp() {
	echo "init.sh"
	echo ""
	echo "use :"
	echo "bash init.sh [options]"
	echo " -b | --base-url url"
}

InitConst() {
	IPV4=$(ip addr | grep 'inet ' | grep -v '127.0' | head -n1 | awk '{print $2}' | cut -f1 -d /)
	
	grep -q -v -a lxc /proc/1/environ
	ISLXC=$?
}

Main() {
	InitConst
	if [[ ${ISLXC} == 0 ]]; then
		NetSetHostname
		NetIPConfig
	else
		APTCleanupLXCPackage
	fi
	NetCleanUpSystemdResolved
	APTSetProxy
	APTUpdateDist
	APTInstallBase
	APTCleanAll
	BashSetAlias
	BashSetPS
	BashRMbashrc
	NanoSetConfig
	IssueSetContent
	SSHEnableRootLogin
	GrubSetConfig
	InstApps
	Reboot
}

NetSetHostname() {
	hostname=$(hostname)
	hostname=$(whiptail --title "Hostname + Domain" --inputbox "" 0 30 "${hostname}" 3>&1 1>&2 2>&3)
	# shellcheck disable=SC2181
	if [ "$?" = "0" ] && [ "${hostname}" != "" ]; then
		hostnamectl set-hostname "${hostname}"
	fi
}
NetIPConfig() {
	options=()
	options+=("DHCP" "")
	options+=("Static" "")
	sel=$(whiptail --title "Network" --menu "" 0 0 0 "${options[@]}" 3>&1 1>&2 2>&3)
	# shellcheck disable=SC2181
	if [ "$?" = "0" ]; then
		case ${sel} in
			"Static") NetIPConfigStatic;;
		esac
	fi
}
NetIPConfigStatic() {
	netif="$(ip a | grep ens | head -n1 | cut -d: -f2)"
	netif=${netif:1}
	netip="${IPV4}"
	netmask="255.255.255.0"
	netgw="$(echo "${IPV4}" | cut -d. -f1-3).1"
	netdns="$(echo "${IPV4}" | cut -d. -f1-3).1"
	netip=$(whiptail --title "Network" --inputbox "IP" 0 30 "${netip}" 3>&1 1>&2 2>&3)
	# shellcheck disable=SC2181
	if [ "$?" = "0" ] && [ "${netip}" != "" ]; then
		netmask=$(whiptail --title "Network" --inputbox "Mask" 0 30 "${netmask}" 3>&1 1>&2 2>&3)
		if [ "$?" = "0" ] && [ "${netmask}" != "" ]; then
			netgw=$(whiptail --title "Network" --inputbox "Route" 0 30 "${netgw}" 3>&1 1>&2 2>&3)
			if [ "$?" = "0" ] && [ "${netgw}" != "" ]; then
				netdns=$(whiptail --title "Network" --inputbox "DNS" 0 30 "${netdns}" 3>&1 1>&2 2>&3)
				if [ "$?" = "0" ] && [ "${netdns}" != "" ]; then
					echo "allow-hotplug ${netif}" > /etc/network/interfaces.d/${netif}
					echo "iface ${netif} inet static" >> /etc/network/interfaces.d/${netif}
					echo -e "\taddress ${netip}" >> /etc/network/interfaces.d/${netif}
					echo -e "\tnetmask ${netmask}" >> /etc/network/interfaces.d/${netif}
					echo -e "\tgateway ${netgw}" >> /etc/network/interfaces.d/${netif}
					sed -i "/${netif}/d" /etc/network/interfaces
					echo "nameserver ${netdns}" > /etc/resolv.conf
				fi
			fi
		fi
	fi
}
NetCleanUpSystemdResolved() {
	sed -i s/#LLMNR=yes/LLMNR=no/ /etc/systemd/resolved.conf
	sed -i s/#DNSStubListener=yes/DNSStubListener=no/ /etc/systemd/resolved.conf
	systemctl restart systemd-resolved
}

APTSetProxy() {
	proxy=""
	proxy=$(whiptail --title "Proxy" --inputbox "ex : http://192.168.1.200/ or leave empty for none" 0 30 "${proxy}" 3>&1 1>&2 2>&3)
	# shellcheck disable=SC2181
	if [ "$?" = "0" ]; then
		if [ "${proxy}" != "" ]; then
			echo "Acquire::http { Proxy \"${proxy}\"; };" > /etc/apt/apt.conf.d/02proxy
		fi
	fi
}
APTCleanupLXCPackage() {
	echo "Skip"
	# apt remove -y bind9-host debian-faq doc-debian postfix x11-common fontconfig-config fonts-dejavu-core gdbm-l10n python-apt-common
}
APTUpdateDist() {
	apt update -y
	apt dist-upgrade -y
}
APTInstallBase() {
	options=()
	options+=("curl" "" on)
	options+=("wget" "" on)
	options+=("lsof" "" on)
	options+=("acpi" "" on)
	options+=("bash-completion" "" on)
	options+=("iptables" "" on)
	options+=("iptables-persistent" "" on)
	options+=("openssh-server" "" on)
	options+=("gnupg" "" on)
	options+=("rsync" "" on)
	options+=("nmon" "" on)
	options+=("snmpd" "" on)
	options+=("clevis-net" "" off)
  sel=$(whiptail --title "Basic Install" --checklist "" 0 0 0 "${options[@]}" 3>&1 1>&2 2>&3)
	# shellcheck disable=SC2181
	# shellcheck disable=SC2001
	if [ "$?" = "0" ]; then
		pkg=""
		for itm in ${sel}; do
			case ${itm} in
			'"iptables-persistent"')
				pkg="${pkg} $(echo "${itm}" | sed 's/"//g')"
				IPTablesPostInstall;;
			'"clevis-net"')
				pkg="${pkg} clevis clevis-luks clevis-systemd clevis-initramfs clevis-tpm2";;
			*)
				pkg="${pkg} $(echo "${itm}" | sed 's/"//g')";;
			esac
		done
		# shellcheck disable=SC2086
		apt install -y ${pkg}
		for itm in ${sel}; do
			case ${itm} in
			'"iptables-persistent"')
				IPTablesConfig;;
			'"snmpd"')
				SNMPDConfig;;
			'"clevis-net"')
				ClevisNetInit;;
			esac
		done
	fi
}
APTCleanAll() {
	apt-get autoremove -y
	apt-get autoclean -y
}

BashSetAlias() {
	wget -O /etc/profile.d/alias.sh "${BASE_URL}"/"${DIR_URL}"/files/alias.sh
}
BashSetPS() {
	wget -O /etc/profile.d/ps1.sh "${BASE_URL}"/"${DIR_URL}"/files/ps1.sh
}
BashRMbashrc() {
	rm /root/.bashrc
}

NanoSetConfig() {
	sed -i "/tabsize/c\set tabsize 2" /etc/nanorc
	{
		echo "set numbercolor brightwhite"
		echo "set statuscolor brightwhite,green"
		echo "set keycolor cyan"
		echo "set functioncolor green"
	} >> /etc/nanorc
	{
		echo "set titlecolor brightwhite,red"
		echo "set statuscolor brightwhite,red"
	} > /root/.nanorc
}

IssueSetContent() {
	wget -O /etc/issue "${BASE_URL}"/"${DIR_URL}"/files/issue
}

IPTablesPostInstall() {
	echo iptables-persistent iptables-persistent/autosave_v4 boolean true | debconf-set-selections
	echo iptables-persistent iptables-persistent/autosave_v6 boolean true | debconf-set-selections
}
IPTablesConfig() {
	wget -O /etc/iptables/rules.v4 "${BASE_URL}"/"${DIR_URL}"/files/rules.v4
	wget -O /etc/iptables/rules.v6 "${BASE_URL}"/"${DIR_URL}"/files/rules.v6
	iptables-restore /etc/iptables/rules.v4
	ip6tables-restore /etc/iptables/rules.v6
}

SNMPDConfig() {
	cummunityname=public
	cummunityname=$(whiptail --title "SNMP Community name" --inputbox "" 0 30 "${cummunityname}" 3>&1 1>&2 2>&3)
	sed -i "s/public/${cummunityname}/" /etc/snmp/snmpd.conf
	sed -i "s/127.0.0.1,\[::1\]/0.0.0.0/" /etc/snmp/snmpd.conf
	systemctl restart snmpd
}

ClevisNetInit() {
	LUKSPARTS=$(lsblk -p -l --fs |grep LUKS |cut -d " " -f1)
	options=()
	IFS_ORIG=$IFS
	IFS=$'\n'
	for LUKSPART in ${LUKSPARTS}
	do  
		options+=("${LUKSPART}" "")
	done
	IFS=$IFS_ORIG
	DEV=$(whiptail --title "Select root LUKS part" --menu "" 0 0 0 "${options[@]}" 3>&1 1>&2 2>&3)
	# shellcheck disable=SC2181
	if [ "$?" = "0" ]; then
		TANGURL=$(whiptail --title "Tang Server" --inputbox "URL" 0 30 "" 3>&1 1>&2 2>&3)
		if [ "$?" = "0" ]; then
			clevis luks bind -d "${DEV}" tang "{\"url\": \"${TANGURL}\"}"
			systemctl enable clevis-luks-askpass.path
		fi
	fi
}

SSHEnableRootLogin() {
	sed -i "/PermitRootLogin prohibit-password/c\PermitRootLogin yes #prohibit-password" /etc/ssh/sshd_config
	systemctl restart sshd
}

GrubSetConfig() {
	if [ -f "/etc/default/grub" ]; then
		sed -i "/GRUB_TIMEOUT/c\GRUB_TIMEOUT=1" /etc/default/grub
		update-grub
	fi
}

InstApps() {
	options=()
	#if [[ ${ISLXC} == 0 ]]; then
	#	options+=("docker" "" off)
	#	options+=("portainer" "" off)
	#fi
	options+=("zimbra-10" "Need Debian 12 zm-builder" off)
	options+=("zimbra-10-zpush" "Need zimbra 10" off)
	options+=("misc-apps" "..." off)
	SEL=$(whiptail --title "More Apps" --checklist "" 0 0 0 "${options[@]}" 3>&1 1>&2 2>&3)
	# shellcheck disable=SC2181
	if [ "$?" = "0" ]; then
		for ITM in ${SEL}; do
			case ${ITM//\"/} in
			misc-apps)
				InstMiscApps;;
			archived-apps)
				InstArchivedApps;;
			*)
				cd /tmp || exit
				wget "${BASE_URL}"/${DIR_URL}/apps/"${ITM//\"/}"/"${ITM//\"/}".sh
				bash ./"${ITM//\"/}".sh "${BASE_URL}"/${DIR_URL}/apps/"${ITM//\"/}";;
			esac
		done
	fi
}
InstMiscApps() {
	options=()
	options+=("bind9" "" off)
	options+=("iperf3" "" off)
	SEL=$(whiptail --title "Misc Apps" --checklist "" 0 0 0 "${options[@]}" 3>&1 1>&2 2>&3)
	# shellcheck disable=SC2181
	if [ "$?" = "0" ]; then
		for ITM in ${SEL}; do
			cd /tmp || exit
			wget "${BASE_URL}"/${DIR_URL}/apps/"${ITM//\"/}"/"${ITM//\"/}".sh
			bash ./"${ITM//\"/}".sh "${BASE_URL}"/${DIR_URL}/apps/"${ITM//\"/}"
		done
	fi
}

Reboot() {
	if whiptail --yesno "Reboot ?" 0 0 3>&1 1>&2 2>&3; then
		reboot
	fi
}

while [ ${#} -gt 0 ]; do
	case ${1} in
		--help) showHelp; exit 0;;
		-b | --base-url) BASE_URL="${2}"; shift;;
		*) shift;;
	esac
done

Main