#!/usr/bin/env bash 

dir=$(readlink -f $(dirname $0)); 
dist=$(echo $dir | sed -re 's,/.*/([^/]+/[^/]+)$,\1,')

GUEST_RELEASE=$dist

[ -z "$http_proxy" ] && http_proxy=""
[ -z "$https_proxy" ] && https_proxy=""

set -eu

#http_proxy=http://193.49.118.36:8080
#https_proxy=http://193.49.118.36:8080


installAll() {
	vdn-ssh -t root@$GUEST_NAME "
		export http_proxy=$http_proxy
		apt-get update -y; apt-get dist-upgrade -y; apt-get install rsync git mingetty
	"
	preInstallForTgz
	installModulesReseaux
	installDocker
	installLamp
	#installNagios3
	#installBackportKernel # NE FONCTIONNE PAS, pas utile.
	#installVdn
	installForTgz
}

##
### Modules réseaux-1 et réseaux-2 ###
###

installModulesReseaux() {

	# Bad to stretch from squeeze
	# php5 php5-mysql smbfs cifs-utils console-tools dhcp3-client samba-doc dhcp3-server sux fuse-utils gproftpd xsmbrowser netkit-ping heartbeat-gui hapm
	
	# Aucune version du paquet smbfs n'est disponible, mais il existe dans la base
	#de données. Cela signifie en général que le paquet est manquant, qu'il est devenu obsolète
	#ou qu'il n'est disponible que sur une autre source
	#Cependant les paquets suivants le remplacent :
	#  cifs-utils
	
	#Aucune version du paquet samba-doc n'est disponible, mais il existe dans la base
	#de données. Cela signifie en général que le paquet est manquant, qu'il est devenu obsolète
	#ou qu'il n'est disponible que sur une autre source
	#Cependant les paquets suivants le remplacent :
	#  winbind smbclient samba-testsuite samba-common-bin samba-common samba
	#  registry-tools libsmbclient libpam-winbind
	
	DEBS="less ssh mingetty rsync net-tools haveged rng-tools dnsutils zerofree"
	#DEBS="$DEBS dhcp3-client dhcp3-server sux fuse-utils gproftpd xsmbrowser netkit-ping heartbeat-gui hapm"
	#DEBS="$DEBS python-gtk-vnc"
	#console-tools console-data console-common
	DEBS="$DEBS vim slirp nfs-common nfs-kernel-server"
	DEBS="$DEBS sshfs psmisc bsdutils strace busybox-static"
	DEBS="$DEBS tcpdump wireshark-gtk nmap"
	DEBS="$DEBS manpages"
	DEBS="$DEBS curlftpfs ftp curl dillo"
	DEBS="$DEBS libapache2-mod-php apache2-doc"
	DEBS="$DEBS xbase-clients"
	DEBS="$DEBS lynx psmisc file strace lsof telnet links links2"
	DEBS="$DEBS iputils-ping"
	DEBS="$DEBS rsync dialog"
	DEBS="$DEBS firefox-esr"
	DEBS="$DEBS nautilus"
	DEBS="$DEBS user-mode-linux"
	DEBS="$DEBS openvpn"
	DEBS="$DEBS quagga proftpd isc-dhcp-server"
	
	DEBS="$DEBS busybox-static rpcbind debootstrap"
	DEBS="$DEBS user-mode-linux"
	
	DEBS="$DEBS vim-gtk gedit"
	
	DEBS="$DEBS gpm vde2"
	DEBS="$DEBS spice-vdagent"

	DEBS="$DEBS gcc make autoconf uidmap pkg-config glib-2.0-dev \
		glib-2.0 libglib2.0-dev dpkg-dev \
		libcap-dev libcap2 libseccomp2 libseccomp-dev"

	# TP Pascal :
	DEBS="$DEBS john hashcat sqlmap php default-mysql-server webcheck"

	echo "apt-get..."
	vdn-ssh -t root@$GUEST_NAME "
		export http_proxy=$http_proxy
		echo ==========
		apt-get install -y $DEBS
	"
	# cas de lighttpd
	vdn-ssh -t root@$GUEST_NAME "
		export http_proxy=$http_proxy
		apt-get install -y lighttpd
		systemctl disable lighttpd
	"
	

	# disable services

	local l="ModemManager NetworkManager NetworkManager-dispatcher NetworkManager-wait-online anacron apparmor autovt@ bgpd dbus-fi.w1.wpa_supplicant1 dbus-org.freedesktop.Avahi dbus-org.freedesktop.ModemManager1 dbus-org.freedesktop.nm-dispatcher dbus-org.freedesktop.timesync1 getty@ hddtemp isisd lighttpd lm-sensors network-manager nfs-kernel-server nmbd openbsd-inetd openvpn ospf6d ospfd pimd portmap pppd-dns ripd ripngd rpcbind rsync smbd speech-dispatcher syslog systemd-timesyncd udisks2 wpa_supplicant zebra nfs-blkmap uml-utilities apache2 proftpd isc-dhcp-server nfs-server"

	vdn-ssh -t root@$GUEST_NAME "for i in $l; do echo \"Disable \$i\"; systemctl disable \$i; done"
	
	# services (enable) :
	#l="avahi-daemon console-setup cron inetd keyboard-setup networking rsyslog ssh sshd uml-utilities" 
	#l="$l apache2 haveged isc-dhcp-server nfs-server proftpd"

	

}

installBackportKernel() {

	local kvers=$(vdn-ssh root@$GUEST_NAME uname -r)

	if ! vdn-ssh root@$GUEST_NAME "grep -q backport /etc/apt/sources.list"; then
		vdn-ssh root@$GUEST_NAME 'echo "deb http://ftp.debian.org/debian buster-backports main" >> /etc/apt/sources.list'
	fi

	vdn-ssh -t root@$GUEST_NAME "apt-get update; apt-get -y install linux-image-5.3.0-0.bpo.2-amd64"

	vdn-ssh -t root@$GUEST_NAME 'grep -v buster-backports /etc/apt/sources.list > /tmp/o; mv /tmp/o /etc/apt/sources.list'

	vdn-ssh -t root@$GUEST_NAME "apt-get update; apt-get -y install --reinstall linux-image-amd64; update-initramfs -u -k $kvers"
}

installDocker() {

	set +u
	[ -z "$http_proxy" ] && http_proxy="" || :
	[ -z "$https_proxy" ] && https_proxy="" || :
	set -u

	# désactive le service docker, Voir les scripts de post-configuration
	# n'ajoute aucun utilisateur au groupe docker par défaut. Voir les scripts de post-configuration

	vdn-ssh -t root@$GUEST_NAME "
	export http_proxy=$http_proxy
	export https_proxy=$https_proxy
	apt-get update
	apt-get -y install apt-transport-https ca-certificates curl gnupg2 software-properties-common
	curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add -
	apt-key fingerprint 0EBFCD88
	add-apt-repository \"deb [arch=amd64] https://download.docker.com/linux/debian \$(lsb_release -cs) stable\"
	apt-get update
	apt-get -y install docker-ce docker-ce-cli containerd.io docker-compose
	curl -L https://raw.githubusercontent.com/docker/compose/1.24.1/contrib/completion/bash/docker-compose -o /etc/bash_completion.d/docker-compose

	systemctl mask containerd docker
"
}

installLamp() {
    vdn-ssh root@$GUEST_NAME "
		export http_proxy=$http_proxy
		apt-get -y install apache2 php mariadb-server libapache2-mod-php php-gd php-mysql
		systemctl disable mariadb mysql
	"
}

preInstallForTgz() {

	echo "Set /etc/modprobe.d/blacklist-floppy.conf..."
    vdn-ssh root@$GUEST_NAME "f=/etc/modprobe.d/blacklist-floppy.conf; ! grep -q floppy \$f && echo \"blacklist floppy\" >> \$f || :"

	echo "Set /etc/initramfs-tools/modules..."
    vdn-ssh root@$GUEST_NAME "f=/etc/initramfs-tools/modules; ! grep -q ne2k_pci \$f && echo ne2k_pci >> \$f || :"
    vdn-ssh root@$GUEST_NAME "f=/etc/initramfs-tools/modules; ! grep -q 8390 \$f && echo 8390 >> \$f || :"
    vdn-ssh root@$GUEST_NAME "f=/etc/initramfs-tools/modules; ! grep -q virtio_net \$f && echo virtio_net >> \$f || :"

    vdn-ssh root@$GUEST_NAME "f=/etc/initramfs-tools/modules; ! grep -q overlay \$f && echo overlay >> \$f || :"
    vdn-ssh root@$GUEST_NAME "f=/etc/initramfs-tools/modules; ! grep -q aufs \$f && echo aufs >> \$f || :"

	echo "Create /etc/initramfs-tools/scripts/local-bottom/overlay.sh ..."


		cat << EOF | vdn-ssh root@$GUEST_NAME "cat > /etc/initramfs-tools/scripts/local-bottom/overlay.sh"
#!/bin/sh

	listDisks() {
        if [ "\$EMULATOR" = linux ]; then
                ls  /dev/ubd[[:lower:]] # | grep -E 'udb[[:lower:]]r?'
        else
                ls /dev/?d[[:lower:]]
        fi
	}


PREREQ=""

	prereqs()
	{
		echo "\$PREREQ"
	}

case \$1 in
	prereqs)
           prereqs
           exit 0
           ;;
	esac


! grep -E -q 'vdn-mode=(tgz|overlay)' /proc/cmdline && {
	echo "*** local-bottom/overlay.sh : exit (no mode tgz or overlay)" >&2
	exit 0
}



echo
echo "*** local-bottom/overlay.sh ***"

echo "Extract configuration..."

listDisks

confDisk=\$(listDisks | tail -n 1)

echo confDisk=\$confDisk

mkdir /vdn
tar -C / -xvzf \$confDisk

if [ \$? -ne 0 ]; then
    echo "Erreur lors de l'extraction de la configuration" >&2
    echo "Lancement d'un shell pour inspection..." >&2
    export PS1="initramfs:\w# "
    /bin/sh -i
fi

if [ -e /etc/vdn/mount-root ]; then
    sh /etc/vdn/mount-root
else
    echo "/etc/vdn/mount-root introuvable !" >&2
    echo "ARRÊT du système !">&2
    while :; do sleep 1000; done
fi

EOF

		vdn-ssh root@$GUEST_NAME chmod 755 /etc/initramfs-tools/scripts/local-bottom/overlay.sh
}


installForTgz() {

    echo "Install for tgz..."


    local kvers

	kvers=$(vdn-ssh root@$GUEST_NAME ls /lib/modules | sort -Vr | head -n1)
	[ -z "$kvers" ] && {
		echo "Warning : /lib/modules is empty !" >&2
		kvers=$(vdn-ssh root@$GUEST_NAME uname -r)
		echo "Use current kernel : $kvers"
	}

    rsync -e vdn-ssh root@$GUEST_NAME:/boot/vmlinuz-$kvers $VDN_PATH/files

    # initramfs (created it if necessary)


	vdn-ssh root@$GUEST_NAME "
		rm -f /boot/initrd.img-$kvers.keep
		if [ -e /boot/initrd.img-$kvers ]; then
			cp /boot/initrd.img-$kvers /boot/initrd.img-$kvers.keep 
		fi

		echo \"update-initramfs ...\" >&2
		update-initramfs -u -k $kvers

		#cat /etc/initramfs-tools/scripts/local-bottom/overlay.sh
		rm /etc/initramfs-tools/scripts/local-bottom/overlay.sh

		cp /boot/initrd.img-$kvers /boot/initrd-tgz.img-$kvers
		
		if [ -e /boot/initrd.img-$kvers.keep ]; then
            mv /boot/initrd.img-$kvers.keep /boot/initrd.img-$kvers
        fi
"

	rsync -e vdn-ssh root@$GUEST_NAME:/boot/initrd-tgz.img-$kvers $VDN_PATH/files

}

installNagios1() {
	# from https://www.itzgeek.com/how-tos/linux/debian/how-to-install-nagios-on-debian-9-stretch.html

	vdn-ssh root@$GUEST_NAME "
	export http_proxy=$http_proxy
	apt update 
	apt install -y build-essential apache2 php openssl perl make php-gd libgd2-xpm-dev libapache2-mod-php libperl-dev libssl-dev daemon wget apache2-utils unzip
	useradd nagios
	groupadd nagcmd
	usermod -a -G nagcmd nagios
	usermod -a -G nagcmd www-data
	cd /tmp/ 
	wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.4.5.tar.gz 
	tar -zxvf nagios-4.4.5.tar.gz 
	cd /tmp/nagios-4.4.5/
	./configure --with-nagios-group=nagios --with-command-group=nagcmd --with-httpd_conf=/etc/apache2/sites-enabled/
	make all
	make install
	make install-init
	make install-config
	make install-commandmode
	make install-webconf
"
}

installNagios2() {

	### sudo nano /usr/local/nagios/etc/objects/contacts.cfg
    vdn-ssh root@$GUEST_NAME "
	export http_proxy=$http_proxy
	#sed -i -re 's/^.*email.*$/email                  root@localhost ;/' /usr/local/nagios/etc/objects/contacts.cfg
	htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
	a2enmod cgi
	systemctl restart apache2
	cd /tmp
	wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz
	tar -zxvf /tmp/nagios-plugins-2.2.1.tar.gz
	cd /tmp/nagios-plugins-2.2.1/
	./configure --with-nagios-user=nagios --with-nagios-group=nagios
	make
	make install
	/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
"

}

installNagios3() {
	vdn-ssh root@$GUEST_NAME "
	export http_proxy=$http_proxy
	apt install -y nagios-nrpe-server nagios-plugins
	apt -y install nagios-nrpe-plugin
"
}

installVdn() {
	vdn-ssh root@$GUEST_NAME "
	export http_proxy=$http_proxy
	cd /tmp
	rm -Rf vdn
	git clone http://opale.u-clermont1.fr/vdn/git/vdn.git
	echo "vdn/bin/vdn-prepare $GUEST_RELEASE"
	vdn/bin/vdn-prepare $GUEST_RELEASE 
"
}




# début des fonctions

synopsis() {
	cat << EOF
Usage : `basename $0` [-i identity] system
EOF
}

help() {
	cat << EOF

`basename $0` prepare un système virtuel pour fonctionner en mode DIRECT.

`synopsis`

Une identification par clé pour ssh est mise en place (cf. -i identity)
pour éviter les identification par mot de passe lors des connexions ssh 
de l'hôte vers l'invité nécessaires à l'opération.

Les mots de passes sont fixés de façon aléatoire

-h            : affiche cette aide
-i identity   : chemin de la clé publique à utiliser.

EOF
}

usage() {
	synopsis
	exit 2
}

args() {
	local opt
	while getopts "hi:" opt; do
		case $opt in
			h) help; exit 0;;
			i) IDENTITY="$OPTARG";;
			?) usage;;
		esac
	done
	shift $(($OPTIND - 1))
	[ $# -ne 1 ] && usage

	GUEST_NAME="$1"
	if echo $GUEST_NAME | grep -q '/'; then
		error "$GUEST_NAME est un nom de système invalide"
	fi
}


# Programme principal

VDN_PATH=$(readlink -f $(dirname $0)/../../../../..); . $VDN_PATH/bin/functions.sh

args "$@"

PROG_DIR=$(readlink -f $(dirname $0))

if ! $VDN_PATH/bin/vdn-alive $GUEST_NAME; then
	error "Le système $GUEST_NAME n'est pas démarré"
fi

loadGuestVars $GUEST_NAME

foundIdentity=0
for i in $SSH_IDENTITY; do
	if [ -e   $i ]; then
		IDENTITY=$i
		foundIdentity=1
	fi
done

[ $foundIdentity = 0 ] && error "Aucune clé SSH !"

if vdn-ssh -n -o PasswordAuthentication=no root@$GUEST_NAME exit 0 ; then
	vdn-ssh-copy-id -i $IDENTITY root@$GUEST_NAME
fi

#echo "apt-get..."
#vdn-ssh root@$GUEST_NAME apt-get install rsync net-tools

#echo "Set /etc/initramfs-tools/modules..."
#vdn-ssh root@$GUEST_NAME "f=/etc/initramfs-tools/modules; ! grep -q ne2k_pci \$f && echo ne2k_pci >> \$f || :"
#vdn-ssh root@$GUEST_NAME "f=/etc/initramfs-tools/modules; ! grep -q 8390 \$f && echo 8390 >> \$f || :"
#vdn-ssh root@$GUEST_NAME "f=/etc/initramfs-tools/modules; ! grep -q virtio_net \$f && echo virtio_net >> \$f || :"

#echo "Set /etc/modprobe.d/blacklist-floppy.conf..."
#vdn-ssh root@$GUEST_NAME "f=/etc/modprobe.d/blacklist-floppy.conf; ! grep -q floppy \$f && echo \"blacklist floppy\" >> \$f || :"


vdn-ssh -t root@$GUEST_NAME chmod 755 /

echo "Add test user to kvm group (for nested)"
vdn-ssh root@$GUEST_NAME "addgroup test kvm"

echo "Add test user to kvm group (for nested)"
vdn-ssh root@$GUEST_NAME "addgroup test docker || :"


#echo "Add test user to sudo group"
#vdn-ssh root@$GUEST_NAME "addgroup test sudo"

echo "Set vim syntax=on"
vdn-ssh root@$GUEST_NAME "cat /etc/vim/vimrc | sed -re 's/^.*syntax on.*$/syntax on/' > /etc/vim/vimrc.new"
vdn-ssh root@$GUEST_NAME "mv /etc/vim/vimrc.new /etc/vim/vimrc"
vdn-ssh root@$GUEST_NAME "cp /etc/vim/vimrc ~/.vimrc"
vdn-ssh root@$GUEST_NAME "cp /etc/vim/vimrc /home/test/.vimrc; chown test: /home/test/.vimrc"

echo "Allow root autologin on ttyS0"
vdn-ssh root@$GUEST_NAME "sed -i -re 's,^ExecStart=.*$,ExecStart=-/sbin/mingetty --noclear --autologin root %I,' /lib/systemd/system/serial-getty@.service"

# kernel params (in grub )

echo "Allow net.ifnames=0 in GRUB "
vdn-ssh root@$GUEST_NAME "sed -i -re 's,^GRUB_CMDLINE_LINUX_DEFAULT=.*$,GRUB_CMDLINE_LINUX_DEFAULT=\"net.ifnames=0 console=ttyS0\,115200n8\",' /etc/default/grub"
echo " 1s timout for menu"
vdn-ssh root@$GUEST_NAME "sed -i -re 's,^GRUB_TIMEOUT=.*$,GRUB_TIMEOUT=1,' /etc/default/grub"
vdn-ssh root@$GUEST_NAME "update-grub"

##########################

export http_proxy=\"$http_proxy\"
export https_proxy=\"$https_proxy\"

echo "http_proxy:$http_proxy"
echo "https_proxy:$https_proxy"

#echo "For debug : exit to guit"
#vdn-ssh root@$GUEST_NAME

installAll

vdn-ssh root@$GUEST_NAME "systemctl mask nagios"

##########################

echo "Set rc.local..."
if [ -e $PROG_DIR/rc.local ]; then
	vdn-scp -p $PROG_DIR/rc.local root@$GUEST_NAME:/etc
	vdn-ssh root@$GUEST_NAME chmod 755 /etc/rc.local
fi

## Install lxdm
#echo "Install lxdm..."
#
#vdn-ssh -t root@$GUEST_NAME "
#apt-get -y install lxdm
#apt-get -y remove openbox
#"

#echo "Default xsession : xfce4 "
#vdn-ssh root@$GUEST_NAME "sed -i -re 's,^# session=.*$,session=/usr/bin/startxfce4,' /etc/lxdm/lxdm.conf"

#echo "For debug : exit to guit"
#vdn-ssh root@$GUEST_NAME 

# Clear

echo "Clear /var/log, history, ..."
vdn-ssh -t root@$GUEST_NAME '
export http_proxy=$http_proxy

rm -Rf /etc/vdn

#for i in $(find /var/log -type f); do cat /dev/null > $i; done
find /var/log -name "*.gz" -delete

echo "Clear .bash_history"

rm -f /root/.bash_history
touch /root/.bash_history
chmod 600 /root/.bash_history
rm -f /home/test/.bash_history
touch /home/test/.bash_history
chmod 600 /home/test/.bash_history

echo "Clear .cache .mozilla"
for d in /root /home/test; do
	rm -Rf $d/.cache
	rm -Rf $d/.mozilla
done

echo "Clear authorized_keys"

for d in /root /home/test; do 
	rm -f $d/.ssh/authorized_keys
	rm -f $d/.ssh/authorized_keys
done

echo "Clear apt-cache..."
apt autoremove -y
sleep 1
apt-get clean

echo end of cleaning !
'