#!/bin/bash

# 获取当前日期和时间
current_time=$(date +"%Y%m%d%H")
userName=$1
password=$2
dbName=$3
host=$4
backUpPath=$5
ossPath=$6

# 备份文件名
backup_file="${dbName}_backUp_${current_time}.sql"

echo "backup_file: "${backup_file}
mkdir ${backUpPath} -p || true
# 备份MySQL数据库
mysqldump --column-statistics=0 -R --opt -u${userName} -p"${password}" -h${host} ${dbName} > ${backUpPath}/"$backup_file"
cd ${backUpPath}
rm sql -rf || true
mkdir sql || true
mv ${backup_file} sql/
tar -czvf ${backup_file}".tar.gz" "sql/"
ossutil cp ${backup_file}".tar.gz" oss://${ossPath}/${backup_file}".tar.gz"
rm -fr sql

calculate_hour_diff() {
    # 传入两个时间字符串作为参数
    local time1=$1
    local time2=$2

    # 截取时间字符串中的年、月、日和小时部分
    local year1=${time1:0:4}
    local month1=${time1:4:2}
    local day1=${time1:6:2}
    local hour1=${time1:8:2}

    local year2=${time2:0:4}
    local month2=${time2:4:2}
    local day2=${time2:6:2}
    local hour2=${time2:8:2}

    # 将时间字符串转换为时间戳
    local timestamp1=$(date -d "$year1-$month1-$day1 $hour1:00:00" +%s)
    local timestamp2=$(date -d "$year2-$month2-$day2 $hour2:00:00" +%s)

    # 计算两个时间戳的差值，单位为小时
    local diff_hours=$(( ($timestamp2 - $timestamp1) / 3600 ))

    # 返回计算结果
    echo $diff_hours
}
# 存储60个小时前的备份文件名的数组
old_backup_files=()

cd ${backUpPath}
# 遍168个小时前的备份文件，并将文件名存入数组
CURRENT_DATE=$(date +%Y%m%d%H)
for file in ${dbName}--*.sql.tar.gz; do
    file_date=$(echo "$file" | grep -oP "\d{10}(?=.sql.tar.gz)")
    if [ ${#file_date} -le 1 ]; then
      continue
    fi
    echo $file_date
    difft=$(calculate_hour_diff $file_date $CURRENT_DATE )
    echo difft $difft
    if [[ difft -gt 168 ]]; then
    	echo $file  $CURRENT_DATE $file_date $((CURRENT_DATE - file_date))
        old_bacup_files+=("$file")
    fi
done

# 遍历数组，删除备份文件
for file in "${old_backup_files[@]}"; do
    rm "$file" || true
    ossutil rm $file oss://${ossPath}/$file -f || true
done

#删除10天前的备份
#delete_date=$(date -d "10 days ago" +%Y-%m-%d)
#delete_file="${dbName}_backup_${delete_date}.sql.tar.gz"
#rm ${backUpPath}/"$delete_file"

# 输出日志
echo "[$current_date $current_time] 执行${dbName}数据库备份并删除10天前备份成功"