#!/bin/sh

set -e

Config ()
{
	FILE="${1}"
	KEY="${2}"
	VALUE="${3}"

	TMPFILE="$(mktemp --dry-run ${FILE}.XXXX)"

	if [ ! -e "${FILE}" ]
	then

cat > "${FILE}" << EOF
# ${FILE}

${KEY}="${VALUE}"
EOF

	fi

	cp -a -f "${FILE}" "${TMPFILE}"

	test -z "${VALUE}" || \
		grep -Eq "^ *$(echo ${KEY})=" "${FILE}" || \
		echo "${KEY}=" >> "$FILE}"

	sed -e "s|^ *\($(echo ${KEY})\)=.*|\1=\"${VALUE}\"|" \
	< "${FILE}" > "${TMPFILE}"

	mv -f "${TMPFILE}" "${FILE}"
}

Install ()
{
	DEFAULT="${1}"
	TARGET="${2}"

	mkdir -p "${DEFAULT}"
	mkdir -p "${TARGET}"

	if [ "${TARGET}" != "${DEFAULT}" ]
	then
		if [ -h "${DEFAULT}" ]
		then
			rm -f "${DEFAULT}"
			ln -s "${TARGET}" "${DEFAULT}"
		else
			if [ -e "${DEFAULT}" ] && [ -z "$(ls -A ${DEFAULT})" ]
			then
				rmdir "${DEFAULT}"
				ln -s "${TARGET}" "${DEFAULT}"
			fi
		fi
	fi

	if ! dpkg-statoverride --list "${DEFAULT}" > /dev/null 2>&1 &&
	   ! dpkg-statoverride --list "${TARGET}" > /dev/null 2>&1
	then
		if getent group ssl-cert > /dev/null 2>&1
		then
			GROUP="ssl-cert"
		else
			GROUP="root"
		fi

		chmod 0770 "${TARGET}"
		chown root:"${GROUP}" "${TARGET}"

		chmod 0770 "${DEFAULT}"
		chown root:"${GROUP}" "${DEFAULT}"
	fi
}

case "${1}" in
	configure)
		. /usr/share/debconf/confmodule

		db_get open-infrastructure-dehydrated-tools/ca
		CA="${RET}" # select

		db_get open-infrastructure-dehydrated-tools/challengetype
		CHALLENGETYPE="${RET}" # select

		db_get open-infrastructure-dehydrated-tools/contact-email
		CONTACT_EMAIL="${RET}" # string (w/ empty)

		db_get open-infrastructure-dehydrated-tools/hooks
		HOOKS="${RET}" # multi-select (w/ empty)

		db_get open-infrastructure-dehydrated-tools/basedir
		NEW_BASEDIR="${RET}" # string (w/o empty)

		db_get open-infrastructure-dehydrated-tools/register
		REGISTER="${RET}" # boolean

		db_stop

		Config /etc/dehydrated/conf.d/ca.sh CA ${CA}
		Config /etc/dehydrated/conf.d/challenge.sh CHALLENGETYPE ${CHALLENGETYPE}
		Config /etc/dehydrated/conf.d/contact.sh CONTACT_EMAIL ${CONTACT_EMAIL}

		for HOOK in $(cd /usr/share/dehydrated/hooks && find -maxdepth 1 -not -type d -printf '%P\n' | sort)
		do
			if [ -L "/etc/dehydrated/hook.d/${HOOK}" ]
			then
				rm -f "/etc/dehydrated/hook.d/${HOOK}"
			fi
		done

		if [ -n "${HOOKS}" ]
		then
			Config /etc/dehydrated/conf.d/hook.sh HOOK /usr/bin/dehydrated-hook.d

			HOOKS="$(echo ${HOOKS} | sed -e 's|,| |g')"

			if echo "${HOOKS}" | grep -qs "ALL"
			then
				HOOKS="$(cd /usr/share/dehydrated/hooks && find -maxdepth 1 -not -type d -printf '%P\n' | sort)"
			fi

			for HOOK in ${HOOKS}
			do
				if [ ! -e "/etc/dehydrated/hook.d/${HOOK}" ] && [ -e "/usr/share/dehydrated/hooks/${HOOK}" ]
				then
					ln -sf "/usr/share/dehydrated/hooks/${HOOK}" "/etc/dehydrated/hook.d/${HOOK}"
				fi
			done
		fi

		for FILE in /etc/dehydrated/config /etc/dehydrated/conf.d/*.sh
		do
			if [ -e "${FILE}" ]
			then
				. ${FILE} || true
			fi
		done

		if [ -n "${NEW_BASEDIR}" ] && [ "${BASEDIR}" != "${NEW_BASEDIR}" ]
		then
			Install "${BASEDIR}" "${NEW_BASEDIR}"
		fi

		case "${REGISTER}" in
			true)
				dehydrated --register --accept-terms
				;;
		esac
		;;

	abort-upgrade|abort-remove|abort-deconfigure)

		;;

	*)
		echo "postinst called with unknown argument \`${1}'" >&2
		exit 1
		;;
esac

#DEBHELPER#

exit 0