#!/bin/bash
#
# Prepare/Configure MySQL
#    Copyright (C) 2017  AleaJactaEst
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    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 Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.

usage()
{
cat << EOF
usage:$0 [options]
  prepare mysql (create directory, update configuration)

options:
  -h, --help              : Show this help
  -d, --debug             : Show debug message
EOF
}

update_mysql_config()
{
   if [ -z "$1" ]
   then
      msg_error "missing configuration file"
      return
   fi
   if [ -f "$1" ]
   then
      msg_debug "update configuration $1"
      sed -i -r 's/^user[[:space:]]+=[[:space:]]+(.*)/user = gameserver/g' $1 || exit 2
      sed -i -r 's/^datadir[[:space:]]+=[[:space:]]+(.*)/datadir = \/home\/gameserver\/database/g' $1 || exit 2
      sed -i -r 's/^log_error[[:space:]]+=[[:space:]]+(.*)/log_error = \/home\/gameserver\/log\/mysql\/error\.log/g' $1 || exit 2
      sed -i -r 's/^(#*)general_log_file[[:space:]]+=(.*)/general_log_file = \/home\/gameserver\/log\/mysql\/mysql\.log/g' $1 || exit 2
      sed -i -r 's/^(#*)general_log[[:space:]]+=(.*)/general_log = 1/g' $1 || exit 2
      sed -i -r 's/^(#*)slow_query_log_file[[:space:]]+=(.*)/slow_query_log_file = \/home\/gameserver\/log\/mysql\/mysql-slow\.log/g' $1 || exit 2
      sed -i -r 's/^(#*)slow_query_log[[:space:]]+=(.*)/slow_query_log = 1/g' $1 || exit 2
      sed -i -r 's/^(#*)long_query_time[[:space:]]+=(.*)/long_query_time = 2/g' $1 || exit 2
      sed -i -r 's/^(#*)log_queries_not_using_indexes(.*)/log_queries_not_using_indexes/g' $1 || exit 2
   else
      msg_debug "nothing for $1"
   fi
}

#####################
# MAIN
#####################
source /opt/servercontainer_function.sh
msg_info "$(basename $0) => START"

while test $# -gt 0
do
   case "$1" in
      -h|--help)
         usage
         exit 1
         ;;
      -d|--debug)
         set_debug 1
         shift
         ;;
      *)
         msg_error "options '$1' not recognize"
         usage
         exit 1
         ;;
   esac
done

####################################
# Load Environment
####################################
msg_debug "Load environment"
if [[ ! -f /opt/khanat_config.sh ]]
then
   echo "ERROR - missing /opt/khanat_config.sh"
   exit 2
fi
source /opt/khanat_config.sh

msg_debug "Create database for account gameserver"
# Create database on gameserver account (and change directory database)
if [ $(get_debian_version) -lt 9 ]
then
   msg_info "[$(basename $0):$LINENO] update mysql configuration /etc/mysql/my.cnf"
   # old configuration mysql (on debian 8-)
   update_mysql_config '/etc/mysql/my.cnf'
else
   msg_info "[$(basename $0):$LINENO] update mysql configuration /etc/mysql/mariadb.conf.d/50-server.cnf"
   # For mariadb (on debian 9)
   update_mysql_config '/etc/mysql/mariadb.conf.d/50-server.cnf'
fi

mkdir -p /home/gameserver/database/ || exit 2
chown gameserver:$(id -g -n gameserver) /home/gameserver/database/ || exit 2

mkdir -p /home/gameserver/log/mysql || exit 2
chown -R gameserver:$(id -g -n gameserver) /home/gameserver/log || exit 2

mkdir -p /var/run/mysqld || exit 2
chown gameserver:$(id -g -n gameserver) /var/run/mysqld/ || exit 2

####################################
# End
####################################
msg_info "$(basename $0) => END"