#!/bin/bash
#
# Copyright (c) Authors: https://www.armbian.com/authors
#
# This file is licensed under the terms of the GNU General Public
# License version 2. This program is licensed "as is" without any
# warranty of any kind, whether express or implied.

# read distribution status
# shellcheck source=/dev/null
[[ -f /etc/lsb-release ]] && . /etc/lsb-release
[[ -f /etc/os-release ]] && . /etc/os-release
[[ -z "$DISTRIB_CODENAME" ]] && DISTRIB_CODENAME="${VERSION_CODENAME}"
[[ -n "$DISTRIB_CODENAME" && -f /etc/armbian-distribution-status ]] && DISTRIBUTION_STATUS=$(grep "$DISTRIB_CODENAME" /etc/armbian-distribution-status | cut -d"=" -f2)

. /etc/armbian-release


check_abort()
{

	echo -e "\nDisabling user account creation procedure\n"
	rm -f /root/.not_logged_in_yet
	if [[ ${USER_SHELL} == zsh ]]; then
		printf "\nYou selected \e[0;91mZSH\x1B[0m as your default shell. If you want to use it right away, please logout and login! \n\n"
	fi
	trap - INT
	exit 0

}


read_password()
{

	unset password
	unset charcount
	prompt="$1 password: "

	stty -echo

	charcount=0
	while IFS= read -p "$prompt" -r -s -n 1 char
	do
		if [[ $char == $'\0' ]]
		then
			break
		fi

		# Handle backspace
		if [[ $char == $'\177' ]]
		then
			if [ $charcount -gt 0 ]
			then
				charcount=$((charcount-1))
				prompt=$'\b \b'
				password="${password%?}"
			else
				prompt=''
			fi
		else
			charcount=$((charcount+1))
			prompt='*'
			password+="$char"
		fi
	done

	stty echo

}


set_shell()
{

	readarray -t optionsAudits <<<"$(grep "zsh\|/bash" /etc/shells | sed 's/\/bin\///g' | sed 's/\/usr//g' | uniq)"
	USER_SHELL="bash"

	if [[ "${#optionsAudits[@]}" -gt 1 ]]; then
		while :
			do
				i=1
				echo -e "\nChoose default system command shell:\n"
				for o in  "${optionsAudits[@]}"; do
					echo "$i) $o"
					(( i++ )) || true
				done
				read -r -n1 -s reply
				case $reply in
					"1"|"${optionsAudits[0]}") USER_SHELL="${optionsAudits[0]}"; break;;
					"2"|"${optionsAudits[1]}") USER_SHELL="${optionsAudits[1]}"; break;;
					*) USER_SHELL="${optionsAudits[0]}"; break;;
				esac
			done
	fi
	SHELL_PATH=$(grep "/$USER_SHELL$" /etc/shells | tail -1)

	chsh -s "$(grep -iF "/$USER_SHELL" /etc/shells | tail -1)"
	echo -e "\nShell: \x1B[92m${USER_SHELL^^}\x1B[0m"

	# change shell for future users
	sed -i "s|^SHELL=.*|SHELL=${SHELL_PATH}|" /etc/default/useradd
	sed -i "s|^DSHELL=.*|DSHELL=${SHELL_PATH}|" /etc/adduser.conf

}

set_timezone_and_locales()
{

	# Grab this machine's public IP address
	PUBLIC_IP=$(curl --max-time 5 -s https://ipinfo.io/ip)

	# Check if we have wireless adaptor
	WIFI_DEVICE=$(LC_ALL=C nmcli dev status | grep  " wifi " 2>/dev/null)

	if [ -z "$PUBLIC_IP" ]; then

		# ask for connecting to wireless if wifi device is found
		if [[ -n "$WIFI_DEVICE" ]]; then
			echo -e "Internet connection was \x1B[91mnot detected\x1B[0m."
			echo ""
			read -n1 -s -r -p "Connect via wireless? [Y/n] " response
			echo ""
			if [[ "${response}" =~ ^(Y|y|"")$ ]]; then
				nmtui-connect
			fi
			echo ""
		fi
	fi

	# Grab IP once again if not found
	[[ -z "$PUBLIC_IP" && -n "$WIFI_DEVICE" ]] && PUBLIC_IP=$(curl --max-time 5 -s https://ipinfo.io/ip)

	# Call the geolocation API and capture the output
	RES=$(
		curl --max-time 5 -s "http://ipwhois.app/json/${PUBLIC_IP}" | \
			jq '.timezone, .country, .country_code' | \
			while read -r TIMEZONE; do
				read -r COUNTRY
				echo "${TIMEZONE},${COUNTRY},${COUNTRYCODE}" | tr --delete '"\n'
			done
		)

	TZDATA=$(echo "${RES}" | cut -d"," -f1)
	CCODE=$(echo "${RES}" | cut -d"," -f3 | xargs)
	echo -e "Detected timezone: \x1B[92m$TZDATA\x1B[0m"
	echo ""
	unset response
	while [[ ! "${response}" =~ ^(Y|y|N|n)$ ]]; do
		read -n1 -s -r -p "Set user language based on your location? [Y/n] " response
		echo ""
	done
	# change it only if we have a match and if we agree
	if [[ "${response}" =~ ^(N|n)$ ]]; then
		unset CCODE TZDATA
	fi

	LOCALES=$(grep territory /usr/share/i18n/locales/* | grep _"$CCODE" | cut -d ":" -f 1 | cut -d "/" -f 6 |  \
	xargs -I{} grep {} /usr/share/i18n/SUPPORTED | grep "\.UTF-8" | cut -d " " -f 1)
	# UTF8 is not present everywhere so check again in case it returns empty value
	[[ -z "$LOCALES" ]] && LOCALES=$(grep territory /usr/share/i18n/locales/* | grep _"$CCODE" | cut -d ":" -f 1 | cut -d "/" -f 6 |  \
	xargs -I{} grep {} /usr/share/i18n/SUPPORTED | cut -d " " -f 1)

	readarray -t options <<<"${LOCALES}"

	# when having more locales, prompt for choosing one
	if [[ "${#options[@]}" -gt 1 ]]; then

		options+=("Skip generating locales")
		echo -e "\nAt your location, more locales are possible:\n"
		PS3='Please enter your choice:'
		select opt in "${options[@]}"
			do
				if [[ " ${options[*]} " == *" ${opt} "* ]]; then
					LOCALES=${opt}
					break
				fi
			done
	fi

	if [[ "${LOCALES}" != *Skip* ]]; then

		# if TZDATA was not detected, we need to select one
		if [[ -z ${TZDATA} ]]; then
			TZDATA=$(tzselect | tail -1)
		fi

		timedatectl set-timezone "${TZDATA}"
		dpkg-reconfigure --frontend=noninteractive tzdata > /dev/null 2>&1

		# generate locales
		echo ""
		sed -i 's/# '"${LOCALES}"'/'"${LOCALES}"'/' /etc/locale.gen
		echo -e "Generating locales: \x1B[92m${LOCALES}\x1B[0m"
		locale-gen "${LOCALES}" > /dev/null 2>&1

		# setting detected locales only for user
		{
			echo "export LC_ALL=$LOCALES"
			echo "export LANG=$LOCALES"
			echo "export LANGUAGE=$LOCALES"
		} >> /home/"$RealUserName"/.bashrc
		{
			echo "export LC_ALL=$LOCALES"
			echo "export LANG=$LOCALES"
			echo "export LANGUAGE=$LOCALES"
		} >> /home/"$RealUserName"/.xsessionrc

	fi
}




add_profile_sync_settings()
{
	/usr/bin/psd >/dev/null 2>&1
	config_file="${HOME}/.config/psd/psd.conf"
	if [ -f "${config_file}" ]; then
		# test for overlayfs
		sed -i 's/#USE_OVERLAYFS=.*/USE_OVERLAYFS="yes"/' "${config_file}"
		case $(/usr/bin/psd p 2>/dev/null | grep Overlayfs) in
			*active*)
				echo -e "\nConfigured profile sync daemon with overlayfs."
				;;
			*)
				echo -e "\nConfigured profile sync daemon."
				sed -i 's/USE_OVERLAYFS="yes"/#USE_OVERLAYFS="no"/' "${config_file}"
				;;
		esac
	fi
	systemctl --user enable psd.service >/dev/null 2>&1
	systemctl --user start psd.service >/dev/null 2>&1
}





add_user()
{
	read -r -t 0 _
	REPEATS=3
	while [ -f "/root/.not_logged_in_yet" ]; do
		echo -e "\nPlease provide a username (eg. your first name): \c"
		read -r -e username
		if ! grep '^[a-zA-Z]*$' <<< "$username" > /dev/null ; then
			echo -e "\n\x1B[91mError\x1B[0m: illegal characters in username"
			return
		fi


		RealUserName="$(echo "$username" | tr '[:upper:]' '[:lower:]' | tr -d -c '[:alnum:]')"
		[ -z "$RealUserName" ] && return
		if ! id "$RealUserName" >/dev/null 2>&1; then break; else echo -e "Username \e[0;31m$RealUserName\x1B[0m already exists on the system."; fi
	done

	while [ -f "/root/.not_logged_in_yet" ]; do
		read_password "Create user ($username)"
		first_input="$password"
		echo ""
		read_password "Repeat user ($username)"
		second_input="$password"
		echo ""
		if [[ "$first_input" == "$second_input" ]]; then
			result="$(cracklib-check <<<"$password")"
			okay="$(awk -F': ' '{ print $2}' <<<"$result")"
			if [[ "$okay" != "OK" ]]; then
				echo -e "\n\e[0;31mWarning:\x1B[0m Weak password, $okay \b!"
			fi
			echo -e ""
			read -r -e -p "Please provide your real name: " -i "${RealUserName^}" RealName

			adduser --quiet --disabled-password --home /home/"$RealUserName" --gecos "$RealName" "$RealUserName"
			(echo "$first_input";echo "$second_input";) | passwd "$RealUserName" >/dev/null 2>&1
			for additionalgroup in sudo netdev audio video disk tty users games dialout plugdev input bluetooth systemd-journal ssh; do
				usermod -aG "${additionalgroup}" "${RealUserName}" 2>/dev/null
			done

			# fix for gksu in Xenial
			touch /home/"$RealUserName"/.Xauthority
			chown "$RealUserName":"$RealUserName" /home/"$RealUserName"/.Xauthority
			RealName="$(awk -F":" "/^${RealUserName}:/ {print \$5}" </etc/passwd | cut -d',' -f1)"
			[ -z "$RealName" ] && RealName="$RealUserName"
			echo -e "\nDear \e[0;92m${RealName}\x1B[0m, your account \e[0;92m${RealUserName}\x1B[0m has been created and is sudo enabled."
			echo -e "Please use this account for your daily work from now on.\n"
			rm -f /root/.not_logged_in_yet
			chmod +x /etc/update-motd.d/*
			# set up profile sync daemon on desktop systems
			if command -v psd >/dev/null 2>&1; then
				echo -e "${RealUserName} ALL=(ALL) NOPASSWD: /usr/bin/psd-overlay-helper" >> /etc/sudoers
				touch /home/"${RealUserName}"/.activate_psd
				chown "$RealUserName":"$RealUserName" /home/"${RealUserName}"/.activate_psd
			fi
			break
		elif [[ -n $password ]]; then
			echo -e "Rejected - \e[0;31mpasswords do not match.\x1B[0m Try again [${REPEATS}]."
			REPEATS=$((REPEATS - 1))
		fi
		[[ "$REPEATS" -eq 0 ]] && logout
	done

}

if [[ -f /root/.not_logged_in_yet && -n $(tty) ]]; then
	# disable autologin
	rm -f /etc/systemd/system/getty@.service.d/override.conf
	rm -f /etc/systemd/system/serial-getty@.service.d/override.conf
	systemctl daemon-reload

	# detect display manager
	desktop_lightdm=$(dpkg-query -W -f='${db:Status-Abbrev}\n' lightdm 2>/dev/null)
	desktop_gdm3=$(dpkg-query -W -f='${db:Status-Abbrev}\n' gdm3 2>/dev/null)

	echo -e "\nWaiting for system to finish booting ..."

	systemctl is-system-running --wait >/dev/null

	# enable hiDPI support
	if [[ "$(cut -d, -f1 < /sys/class/graphics/fb0/virtual_size 2> /dev/null)" -gt 1920 ]]; then
		# lightdm
		[[ -f /etc/lightdm/slick-greeter.conf ]] && echo "enable-hidpi = on" >> /etc/lightdm/slick-greeter.conf
		# xfce
		[[ -f /etc/skel/.config/xfce4/xfconf/xfce-perchannel-xml/xsettings.xml ]] && sed -i 's|<property name="WindowScalingFactor" type="int" value=".*|<property name="WindowScalingFactor" type="int" value="2">|g' /etc/skel/.config/xfce4/xfconf/xfce-perchannel-xml/xsettings.xml
		setfont /usr/share/consolefonts/Uni3-TerminusBold32x16.psf.gz
	fi

	clear

	echo -e "Welcome to \e[1m\e[97mARMBIAN\x1B[0m! \n"
	echo -e "Documentation: \e[1m\e[92mhttps://docs.armbian.com\x1B[0m | Community: \e[1m\e[92mhttps://forum.armbian.com\x1B[0m\n"
	GET_IP=$(bash /etc/update-motd.d/30-armbian-sysinfo | grep IP | sed "s/.*IP://" | sed 's/^[ \t]*//')
	[[ -n "$GET_IP" ]] && echo -e "IP address: $GET_IP\n"

	trap '' 2
	REPEATS=3
	while [ -f "/root/.not_logged_in_yet" ]; do

		read_password "Create root"

		# only allow one login. Once you enter root password, kill others.
		loginfrom=$(who am i | awk '{print $2}')
		who -la | grep root | grep -v "$loginfrom" | awk '{print $7}' | xargs --no-run-if-empty kill -9

		first_input="$password"
		echo ""
		read_password "Repeat root"
		second_input="$password"
		echo ""
		if [[ "$first_input" == "$second_input" ]]; then
			result="$(cracklib-check <<<"$password")"
			okay="$(awk -F': ' '{ print $2}' <<<"$result")"
			if [[ "$okay" != "OK" ]]; then
				echo -e "\n\e[0;31mWarning:\x1B[0m Weak password, $okay \b!"
				(echo "$first_input";echo "$second_input";) | passwd root >/dev/null 2>&1
			fi
			break
		elif [[ -n $password ]]; then
			echo -e "Rejected - \e[0;31mpasswords do not match.\x1B[0m Try again [${REPEATS}]."
			REPEATS=$((REPEATS - 1))
		fi
		[[ "$REPEATS" -eq 0 ]] && exit
	done
	trap - INT TERM EXIT

	# display support status
	if [ "$IMAGE_TYPE" != "nightly" ]; then
		if [[ "$BRANCH" == "edge" ]]; then
			echo -e "\nSupport status: \e[0;31mcommunity support\x1B[0m (edge kernel branch)"
		elif [[ "$DISTRIBUTION_STATUS" != "supported" ]]; then
			echo -e "\nSupport status: \e[0;31mcommunity support\x1B[0m (unsupported userspace)"
		elif [[ "$BOARD_TYPE" != "conf" ]]; then
			echo -e "\nSupport status: \e[0;31mcommunity support\x1B[0m (looking for a dedicated maintainer)"
		fi
	else

	echo -e "\e[0;31m\nWARNING!\x1B[0m\n\nYou are using an \e[0;31mautomated build\x1B[0m meant only for developers to provide"
	echo -e	"constructive feedback to improve build system, OS settings or UX.\n"

	echo -e "If this does not apply to you, \e[0;31mSTOP NOW!\x1B[0m  Especially don't use this "
	echo -e "image for production since things might not work as expected or at "
	echo -e "all. They may  break anytime with next update."

	fi

	# ask user to select shell
	trap '' 2
	set_shell
	trap - INT TERM EXIT

	trap check_abort INT

	while [ -f "/root/.not_logged_in_yet" ]; do
		echo -e "\nCreating a new user account. Press <Ctrl-C> to abort"
		[ -n "$desktop_lightdm" ] && echo -e "\n\e[0;31mDesktop environment will not be enabled if you abort the new user creation\x1B[0m"
		add_user
	done
	trap - INT TERM EXIT

	# ask user to select automated locales or not
	trap '' 2
	set_timezone_and_locales
	trap - INT TERM EXIT

	if [[ ${USER_SHELL} == zsh ]]; then
		printf "\nYou selected \e[0;91mZSH\x1B[0m as your default shell. If you want to use it right away, please logout and login! \n\n"
	fi

	declare ConfigureDisplay
	# check whether desktop environment has to be considered
	if [ -n "$desktop_lightdm" ] && [ -n "$RealName" ] ; then

			# 1st run goes without login
			mkdir -p /etc/lightdm/lightdm.conf.d
			cat <<-EOF > /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf
			[Seat:*]
			autologin-user=$RealUserName
			autologin-user-timeout=0
			user-session=xfce
			EOF

			# select gnome session (has to be first or it breaks budgie/cinnamon desktop autologin and user-session)
			[[ -x $(command -v gnome-session) ]] && sed -i "s/user-session.*/user-session=ubuntu/" /etc/lightdm/lightdm.conf.d/11-armbian.conf
			[[ -x $(command -v gnome-session) ]] && sed -i "s/user-session.*/user-session=ubuntu/" /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf

			# select budgie session
			[[ -x $(command -v budgie-desktop) ]] && sed -i "s/user-session.*/user-session=budgie-desktop/" /etc/lightdm/lightdm.conf.d/11-armbian.conf
			[[ -x $(command -v budgie-desktop) ]] && sed -i "s/user-session.*/user-session=budgie-desktop/" /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf

			# select deepin session
			[[ -x $(command -v deepin-wm) ]] && sed -i "s/user-session.*/user-session=deepin/" /etc/lightdm/lightdm.conf.d/11-armbian.conf
			[[ -x $(command -v deepin-wm) ]] && sed -i "s/user-session.*/user-session=deepin/" /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf

			# select cinnamon session
			[[ -x $(command -v cinnamon) ]] && sed -i "s/user-session.*/user-session=cinnamon/" /etc/lightdm/lightdm.conf.d/11-armbian.conf
			[[ -x $(command -v cinnamon) ]] && sed -i "s/user-session.*/user-session=cinnamon/" /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf

			# select mate session
			[[ -x $(command -v mate-wm) ]] && sed -i "s/user-session.*/user-session=mate/" /etc/lightdm/lightdm.conf.d/11-armbian.conf
			[[ -x $(command -v mate-wm) ]] && sed -i "s/user-session.*/user-session=mate/" /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf

			# select plasma wayland session
			[[ -x $(command -v plasmashell) ]] && sed -i "s/user-session.*/user-session=plasmawayland/" /etc/lightdm/lightdm.conf.d/11-armbian.conf
			[[ -x $(command -v plasmashell) ]] && sed -i "s/user-session.*/user-session=plasmawayland/" /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf

			ln -sf /lib/systemd/system/lightdm.service /etc/systemd/system/display-manager.service

			if [[ -f /var/run/resize2fs-reboot ]]; then
				# Let the user reboot now otherwise start desktop environment
				printf "\n\n\e[0;91mWarning: a reboot is needed to finish resizing the filesystem \x1B[0m \n"
				printf "\e[0;91mPlease reboot the system now \x1B[0m \n\n"
			elif [ -z "$ConfigureDisplay" ] || [ "$ConfigureDisplay" = "n" ] || [ "$ConfigureDisplay" = "N" ]; then
				echo -e "\n\e[1m\e[39mNow starting desktop environment...\x1B[0m\n"
				sleep 1
				service lightdm start 2>/dev/null
				if [ -f /root/.desktop_autologin ]; then
					rm /root/.desktop_autologin
				else
					systemctl -q enable armbian-disable-autologin.timer
					systemctl start armbian-disable-autologin.timer
				fi
				# logout if logged at console
				who -la | grep root | grep -q tty1 && exit 1
			fi

	elif [ -n "$desktop_gdm3" ] && [ -n "$RealName" ] ; then

			# 1st run goes without login
			mkdir -p /etc/gdm3
			cat <<-EOF > /etc/gdm3/custom.conf
			[daemon]
			AutomaticLoginEnable = true
			AutomaticLogin = $RealUserName
			EOF

			ln -sf /lib/systemd/system/gdm3.service /etc/systemd/system/display-manager.service

				if [[ -f /var/run/resize2fs-reboot ]]; then

					# Let the user reboot now otherwise start desktop environment
					printf "\n\n\e[0;91mWarning: a reboot is needed to finish resizing the filesystem \x1B[0m \n"
					printf "\e[0;91mPlease reboot the system now \x1B[0m \n\n"

				elif [ -z "$ConfigureDisplay" ] || [ "$ConfigureDisplay" = "n" ] || [ "$ConfigureDisplay" = "N" ]; then

					echo -e "\n\e[1m\e[39mNow starting desktop environment...\x1B[0m\n"
					sleep 1
					service gdm3 start 2>/dev/null
					if [ -f /root/.desktop_autologin ]; then
						rm /root/.desktop_autologin
					else
						(sleep 20; sed -i "s/AutomaticLoginEnable.*/AutomaticLoginEnable = false/" /etc/gdm3/custom.conf) &
					fi
					# logout if logged at console
					who -la | grep root | grep -q tty1 && exit 1

				fi

	else

		# Display reboot recommendation if necessary
		if [[ -f /var/run/resize2fs-reboot ]]; then
			printf "\n\n\e[0;91mWarning: a reboot is needed to finish resizing the filesystem \x1B[0m \n"
			printf "\e[0;91mPlease reboot the system now \x1B[0m \n\n"
		fi

	fi

fi