#!/bin/bash

# 基础配置
backup_dir="/mnt/mydata/backup"  # 本地备份路径
data_dir="/mnt/mydata"          # 要备份的目录
hostname=$(hostname)            # 获取主机名
cloud_dir="backup/$hostname"    # 云端存储路径，使用hostname区分
log_file="/var/log/bypy_backup.log"  # 日志文件
max_cloud_backups=2             # 云端最多保留的备份数量

# 日志函数
log_message() {
    echo "$(date +'%Y-%m-%d %H:%M:%S') - $1" >> "$log_file"
    echo "$1"
}

# 创建本地备份目录
mkdir -p "$backup_dir"

# 生成备份文件名
backup_file="backup-$hostname-$(date +'%Y-%m-%d').tar.gz"
backup_path="$backup_dir/$backup_file"

# 1. 创建新备份
log_message "开始创建备份文件..."
tar -czf "$backup_path" \
    --exclude="$data_dir/.Recycle_bin" \
    --exclude="$backup_dir" \
    "$data_dir" 2>/dev/null

if [ $? -eq 0 ]; then
    log_message "备份文件创建成功: $backup_path"
else
    log_message "备份文件创建失败"
    exit 1
fi

# 2. 清理本地旧备份
num_local_backups=$(ls -l "$backup_dir" | grep ^- | grep 'backup-' | wc -l)
if [ $num_local_backups -gt 1 ]; then
    oldest_local_backup=$(ls -t "$backup_dir" | grep 'backup-' | tail -1)
    rm "$backup_dir/$oldest_local_backup"
    log_message "删除本地旧备份: $oldest_local_backup"
fi

# 3. 同步到云端
log_message "确保云端目录存在..."
/www/server/pyporject_evn/versions/3.13.0/bin/bypy mkdir "$cloud_dir"

log_message "开始上传到云端..."
/www/server/pyporject_evn/versions/3.13.0/bin/bypy syncup "$backup_dir" "$cloud_dir" 2>&1 | while IFS= read -r line; do
    if [[ $line =~ ^\[.*%.*MB\/.*MB.*ETA.* ]] || [[ $line =~ ^Done$ ]] || [[ $line == *"100%"* ]]; then
        echo "$line"
        echo "$(date +'%Y-%m-%d %H:%M:%S') - $line" >> "$log_file"
    fi
done

# 4. 清理云端旧备份
log_message "清理云端旧备份..."
cloud_backups=$(/www/server/pyporject_evn/versions/3.13.0/bin/bypy list "$cloud_dir" | grep "backup-" | awk '{print $NF}')
cloud_backup_count=$(echo "$cloud_backups" | wc -l)

if [ "$cloud_backup_count" -gt "$max_cloud_backups" ]; then
    old_cloud_backups=$(echo "$cloud_backups" | head -n -$max_cloud_backups)
    while IFS= read -r backup; do
        /www/server/pyporject_evn/versions/3.13.0/bin/bypy delete "$cloud_dir/$backup"
        log_message "删除云端旧备份: $backup"
    done <<< "$old_cloud_backups"
fi

log_message "云端备份清理完成"

# 显示当前云端备份列表
log_message "当前云端备份列表:"
/www/server/pyporject_evn/versions/3.13.0/bin/bypy list "$cloud_dir" >> "$log_file"