#!/bin/sh


if [ -f /etc/os-release ]; then
  . /etc/os-release
  DISTRO=$ID

  if [ "$DISTRO" = "ubuntu" ] || [ "$DISTRO" = "debian" ]; then
    OS=DEBIAN
  elif [ "$DISTRO" = "fedora" ] || [ "$DISTRO" = "centos" ]; then
    OS=CENTOS
  else
    echo "OS not detected"
    exit 1 
  fi
else
  echo "/etc/os-release not found, cannot determine OS."
  exit 1
fi


PREFIX=/usr/local/bin/wmde

copy_files() {
	mkdir -p $PREFIX
	cp wmde-rp-init.sh $PREFIX/
	cp wmde-rp-check-pam-user.sh $PREFIX/
	#cp wmde-rp-unison-initial-sync-nfs.sh $PREFIX/
	cp wmde-rp-generate-known-hosts.sh $PREFIX/
	#cp wmde-rp-usersync-nfs.sh $PREFIX/
	cp wmde-rp-unison-ssh.sh $PREFIX/
	cp wmde-rp-common.sh $PREFIX/
	cp wmde-rp-osync-ssh.sh $PREFIX/
	chmod 755 $PREFIX/*
	cp osync.conf.template $PREFIX/

	cp wmde-rp-sync.service /etc/systemd/user/wmde-rp-sync.service
	mkdir -p /etc/systemd/user/default.target.wants
	rm -rf /etc/systemd/user/default.target.wants/wmde-rp-sync.service
	ln -s /etc/systemd/user/wmde-rp-sync.service /etc/systemd/user/default.target.wants/wmde-rp-sync.service

#	cp wmde-rp-full.prf /etc
#	cp wmde-rp-config.prf /etc
#	cp wmde-rp-perm.prf /etc
	cp wmde-rp.conf /etc

	git clone https://srcsrv.wikimedia.de/WMDE/osync.git /tmp/osync
	cp -p /tmp/osync/osync.sh /usr/local/bin/osync.sh
	chmod 755 /usr/local/bin/osync.sh
	systemctl daemon-reload
}

update_pam() {
	rm -rf /etc/authselect/custom/wmde
	authselect create-profile wmde -b sssd --symlink-meta
	
	cp postlogin /etc/authselect/custom/wmde/postlogin

	authselect select custom/wmde with-mkhomedir with-sudo 
	authselect apply-changes
}

if [ "$OS" = "CENTOS" ]; then
	dnf install -y unison
	copy_files
	update_pam
fi

if [ "$OS" = "DEBIAN" ]; then
	apt purge -y unison
	mkdir -p unison_temp
	cd unison_temp
	wget https://github.com/bcpierce00/unison/releases/download/v2.53.7/unison-2.53.7-ubuntu-x86_64-static.tar.gz
	tar xvfz unison-2.53.7-ubuntu-x86_64-static.tar.gz
	cd bin
	chmod +x unison unison-fsmonitor
	sudo mv unison unison-fsmonitor /usr/local/bin/
	cd ..
	cd ..
	rm -rf unison_temp

	copy_files

	FILE="/etc/pam.d/common-session"
	LINE="session required pam_exec.so stdout /usr/local/bin/wmde/wmde-rp-init.sh"
	FOUND=0

	# Datei zeilenweise prüfen
	while IFS= read -r existing_line; do
		if [ "$existing_line" = "$LINE" ]; then
        		FOUND=1
	        	break
		fi
	done < "$FILE"

	if [ "$FOUND" -eq 0 ]; then
		echo "$LINE" >> "$FILE"
		echo "Zeile hinzugefügt."
	else
		echo "Zeile ist bereits vorhanden."
	fi

fi