#!/bin/bash
currentTime=$(date +"%Y-%m-%d-%H")
userName=$1
password=$2
dbName=$3
host=$4
# 定义备份文件存放目录
backUpPath=$5
ossPath=$6


# 获取上次备份的binlog文件名和位置
LAST_BACKUP=$(cat "$backUpPath/last_backup.txt")
LAST_BINLOG=$(echo "$LAST_BACKUP" | awk '{print $1}')
LAST_POSITION=$(echo "$LAST_BACKUP" | awk '{print $2}')

# 如果是第一次运行，设置初始值
if [[ -z "$LAST_BACKUP" ]]; then
    LAST_BINLOG="none"
    LAST_POSITION="0"
fi
echo ""

# 获取当前binlog文件名和位置
CURRENT_BINLOG=$(mysql -u$userName -p$password -h$host -e "SHOW MASTER STATUS\G"  | grep File | awk '{print substr($1, 4)}')
CURRENT_POSITION=$(mysql -u$userName -p$password -h$host -e "SHOW MASTER STATUS\G" | grep Position | awk '{print $2}')

# 备份增量变更到文件
# 如果上次备份的binlog文件名和位置为空，则进行全量备份
cd $backUpPath
#if [ -z "$LAST_BINLOG" ]; then
#    mysqldump -u $MYSQL_USER -p$MYSQL_PASSWORD -h $MYSQL_HOST $MYSQL_DATABASE > "$BACKUP_DIR/full_backup.sql"
#else
    echo "docker exec maria /usr/bin/mysqlbinlog -u"${userName}" -p"${password}" -h"${host}" --start-position="${LAST_BINLOG}" --stop-position="${CURRENT_POSITION}" --result-file='"${backUpPath}"/"${dbName}"-"${currentTime}".sql' "${LAST_BINLOG}
    docker exec maria /usr/bin/mysqlbinlog -u${userName} -p${password} -h${host} --start-position=${LAST_BINLOG} --stop-position=${CURRENT_POSITION} --result-file="${backUpPath}/${dbName}-${currentTime}.sql" ${LAST_BINLOG}
#fi
# 更新上次备份的binlog文件名和位置
echo "$CURRENT_BINLOG $CURRENT_POSITION" > "last_backup.txt"

# 获取备份文件列表
backup_files=($(find "$backUpPath" -name "$dbName-*.sql" -type f -printf "%f\n"))

# 打印备份文件列表
for file in "${backup_files[@]}"; do
    echo "$file"
done