#!/bin/bash

# 备份脚本
# 用法: ./scripts/backup.sh

set -e

BACKUP_DIR="./backups"
DATE=$(date +%Y%m%d_%H%M%S)
BACKUP_NAME="backup_$DATE"

# 创建备份目录
mkdir -p "$BACKUP_DIR/$BACKUP_NAME"

echo "开始备份..."

# 备份数据库
if [ -f "./data/prod.db" ]; then
  echo "备份数据库..."
  cp ./data/prod.db "$BACKUP_DIR/$BACKUP_NAME/database.db"
else
  echo "警告: 数据库文件不存在"
fi

# 备份上传文件
if [ -d "./uploads" ]; then
  echo "备份上传文件..."
  cp -r ./uploads "$BACKUP_DIR/$BACKUP_NAME/uploads"
else
  echo "警告: uploads目录不存在"
fi

# 备份配置
if [ -f ".env.production" ]; then
  echo "备份配置..."
  cp .env.production "$BACKUP_DIR/$BACKUP_NAME/.env.production"
else
  echo "警告: .env.production文件不存在"
fi

# 压缩备份
echo "压缩备份..."
tar -czf "$BACKUP_DIR/$BACKUP_NAME.tar.gz" -C "$BACKUP_DIR" "$BACKUP_NAME"

# 删除临时目录
rm -rf "$BACKUP_DIR/$BACKUP_NAME"

# 保留最近7天的备份
echo "清理旧备份..."
find "$BACKUP_DIR" -name "backup_*.tar.gz" -mtime +7 -delete

echo "备份完成: $BACKUP_DIR/$BACKUP_NAME.tar.gz"
echo "备份大小: $(du -h "$BACKUP_DIR/$BACKUP_NAME.tar.gz" | cut -f1)"