#!/bin/bash

# Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

if [ "$1" = purge ] && [ -e /usr/share/debconf/confmodule ];
then
. /usr/share/debconf/confmodule
fi

place_upstart_job_back () {
	if [ -e "/var/lib/mysql/.mysql.conf.backup" ];
	then
		mv /var/lib/mysql/.mysql.conf.backup /etc/init/mysql.conf
	fi
}

get_pcount () {
	PSCOUNT=$(ps -ef | grep "/usr/sbin/mysqld" | wc -l)
	echo "${PSCOUNT}"
}

server_stop () {
	PSCOUNT=$(get_pcount)
	COUNT=0
	while :; do
		COUNT=$(( COUNT+1 ))
		echo -n .
		if [ "${PSCOUNT}" -eq 1 ];
		then
			echo
			break
		fi
		if [ "${COUNT}" -gt 15 ];
		then
			echo
			return 1
		fi
		PSCOUNT=$(get_pcount)
		sleep 1
	done
	return 0
}

case "$1" in
	remove)

	set -e

	place_upstart_job_back

	set +e

	;;

	purge)

	set -e

	place_upstart_job_back

	MYSQLDATA=/var/lib/mysql
	MYSQLFILES=/var/lib/mysql-files
	MYSQLLOG=/var/log/mysql
	MYSQLRUN=/var/run/mysqld
	MYSQLKEYRING=/var/lib/mysql-keyring

	server_stop

	db_input high percona-server-server-5.7/remove-data-dir || true
	db_go
	db_get percona-server-server-5.7/remove-data-dir && RMDATADIR=${RET}
	if [ "${RMDATADIR}" = "true" ];
	then
		if [ -d ${MYSQLRUN} ] || [ -L ${MYSQLRUN} ];
		then
			rm -rf ${MYSQLRUN}
		fi

		if [ -d ${MYSQLLOG} ] || [ -L ${MYSQLLOG} ];
		then
			rm -rf ${MYSQLLOG}
		fi

		if [ -d ${MYSQLDATA} ] || [ -L ${MYSQLDATA} ];
		then
			rm -rf ${MYSQLDATA}
		fi

		if [ -d ${MYSQLFILES} ] || [ -L ${MYSQLFILES} ];
		then
			rm -rf ${MYSQLFILES}
		fi

		if [ -d ${MYSQLKEYRING} ] || [ -L ${MYSQLKEYRING} ];
		then
			rm -rf ${MYSQLKEYRING}
		fi

		if getent passwd mysql >/dev/null;
		then
			userdel mysql
		fi
	fi

	set +e
	;;

	abort-install)

	set -e

	place_upstart_job_back

	if [ -x "/etc/init.d/mysql" ];
	then
		invoke-rc.d mysql start || exit $?
	else
	        if [ -d ${MYSQLRUN} ] || [ -L ${MYSQLRUN} ];
		then
			rm -rf ${MYSQLRUN}
		fi

		if [ -d ${MYSQLLOG} ] || [ -L ${MYSQLLOG} ];
		then
			rm -rf ${MYSQLLOG}
		fi

		if [ -d ${MYSQLDATA} ] || [ -L ${MYSQLDATA} ];
		then
			rm -rf ${MYSQLDATA}
		fi

		if [ -d ${MYSQLFILES} ] || [ -L ${MYSQLFILES} ];
		then
			rm -rf ${MYSQLFILES}
		fi

		if getent passwd mysql >/dev/null;
		then
			userdel mysql
		fi
	fi

	set +e
	;;

	upgrade|abort-upgrade)

	;;

	*)
	exit 1
	;;
esac

#DEBHELPER#

exit 0
