#!/bin/bash

if [ "$(id -u)" != "0" ]; then
    echo -e "\033[31mThis script requires superuser rights\033[0m"
    exit 0
fi

if [ -z "$1" ]; then
  echo "Please provide the MYSQL_DB as argument"
  exit 1
fi

SECRETS_PATH=/data/secrets/$SERVER_DOMAIN/$SERVER_DOMAIN.env

trap 'echo -e "\033[31mmariadb.sh: Something went wrong\033[0m"; exit 1' ERR
set -e

export DEBIAN_FRONTEND=noninteractive

source $SECRETS_PATH

if [ -z "$MARIADB_ROOT_PASSWORD" ]; then
    echo "Error: MARIADB_ROOT_PASSWORD is not set or is empty"
    exit 1
fi

MYSQL_DB="$1"
MYSQL_USER=root

CURRENT_MONTH=$(date +%Y-%m)
CURRENT_DATE=$(date +%Y-%m-%d)
CURRENT_DATETIME=$(date +%d-%m-%Y_%H%M%S)
BACKUPS_PATH=/backups/mariadb
DOCKER_SERVICE_NAME=mariadb

BACKUP_FOLDER=$BACKUPS_PATH/$MYSQL_DB

echo 'check BACKUP_FOLDER...'
mkdir -p "$BACKUP_FOLDER"

echo 'Creating mariadb backups...'
cd "$BACKUP_FOLDER"
if [ -f 'dump_'"$MYSQL_DB"'.sql' ]; then
   rm 'dump_'"$MYSQL_DB"'.sql'
fi
DB_BACKUP_FILENAME=$MYSQL_DB'_'$CURRENT_DATETIME'.tar.gz'

echo 'Exec mariadb-dump...'
docker exec -t $DOCKER_SERVICE_NAME mariadb-dump -u $MYSQL_USER -p$MARIADB_ROOT_PASSWORD $MYSQL_DB > 'dump_'"$MYSQL_DB"'.sql'

echo 'Pack to tar.gz...'
tar -cf - 'dump_'"$MYSQL_DB"'.sql' | gzip -9 > "$DB_BACKUP_FILENAME"
rm 'dump_'"$MYSQL_DB"'.sql'

cd "$BACKUP_FOLDER"

echo 'Write md5 sum...'
md5sum * > MD5SUMS

trap - ERR
echo 'The backup of the '"$MYSQL_DB"' database was completed successfully'