#!/bin/bash
set -e
set -u

# small library for output
. "$(dirname $0)/out.sh"

# questo coso assume che si usa machinectl

# questa macchina e' una debian pulita
sourcemachine=jessie-amd64-base
# questa macchina ha alcune cose di base installate/configurate
# come Apache, PHP, eccetera
intermediate=wwwd8-base
if [[ $# -eq 0 ]]; then
	testmachine=wwwd8-test-$(date +%y%m%d%H%M%S)
elif [[ $# -eq 1 ]]; then
	testmachine=$1
	shift 1
else
	echo "Usage error" >&2
	exit 2
fi


drupal_path=/var/www/d8/
conf="$(dirname $0)/../config.sh"
[[ -f "$conf" ]]  && . "$conf"


machineexists() {
	machinectl list-images|awk '{ print $1 }'|egrep -q "^${1}\$"
}

inm() {
	# execute command IN Machine
	machine=$1
	shift 1
	systemd-nspawn --setenv='DEBIAN_FRONTEND=noninteractive' -D "/var/lib/machines/${machine}" "$@"
}

sourcecreate() {
	progress "Creating source machine"
	debootstrap "/var/lib/machines/${sourcemachine}"
	ok "Source machine created ($sourcemachine)"
}

intermcreate() {
	if ! machineexists "$intermediate"; then
		if ! machineexists "$sourcemachine"; then
			sourcecreate
		fi
		machinectl clone "${sourcemachine}" "${intermediate}"
	fi
	progress "Setting up intermediate machine $intermediate"
	cat <<EOF > /var/lib/machines/${intermediate}/etc/gitconfig
[transfer]
fsckobjects = true
[fetch]
fsckobjects = true
[receive]
fsckObjects = true 
EOF
	cat <<EOF > /var/lib/machines/${intermediate}/etc/apt/apt.conf.d/default.conf
APT::Default-Release "jessie";
EOF
	if [[ ! -f /var/lib/machines/${intermediate}/etc/apt/sources.list.d/stretch.list ]]; then
		cat <<EOF > /var/lib/machines/${intermediate}/etc/apt/sources.list.d/stretch.list
deb http://ftp.debian.org/debian stretch main
EOF
		inm $intermediate /usr/bin/apt-get -q update
	fi
	# those are idempotent, so...
	inm $intermediate /usr/bin/apt-get -q -y install apache2 libapache2-mod-php5 php5-gd php5-mysql mariadb-server git pwgen
	inm $intermediate /usr/bin/apt-get -q -y install -t stretch composer
	inm $intermediate /usr/sbin/a2enmod rewrite
	inm $intermediate /usr/sbin/a2enmod php5
	inm $intermediate /bin/mkdir -p /mig
	inm $intermediate /bin/sed -i "s+DocumentRoot.*$+DocumentRoot ${drupal_path}+" /etc/apache2/sites-enabled/000-default.conf 

	progress "Installation of Drush"
	inm $intermediate /usr/bin/composer global require drush/drush:8.0.3
	if ! inm $intermediate  /usr/bin/test -x /root/.composer/vendor/bin/drush; then
		error Cannot install drush
		exit 1
	else
		inm ${intermediate} /bin/ln -sf /root/.composer/vendor/bin/drush /usr/bin/drush
		ok "Drush installed"
	fi
	ok "Intermediate machine $intermediate set up"
}

testcreate() {
	if ! machineexists "${testmachine}"; then
		intermcreate
		machinectl clone "${intermediate}" "${testmachine}"
	fi
}

testcreate
progress "deploying on ${testmachine}"
systemd-nspawn -D "/var/lib/machines/${testmachine}"\
	--bind-ro="$(readlink -f $(dirname $0)/../):/mig" \
	/mig/deploy/deploy.sh
ok "all done, enjoy!"