#!/usr/bin/env sh
set -eu

PROJECT_ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
cd "$PROJECT_ROOT"

if [ ! -f ".env" ] && [ -f ".env.example" ]; then
  echo "未找到 .env，先从 .env.example 复制一份："
  echo "  cp .env.example .env"
  exit 1
fi

DATA_DIR_VALUE=$(grep '^DATA_DIR=' .env 2>/dev/null | tail -n 1 | cut -d '=' -f 2- || true)
DATA_DIR=${DATA_DIR_VALUE:-./data}
DB_PATH="$DATA_DIR/app.db"

if [ ! -f "$DB_PATH" ]; then
  echo "未找到数据库文件：$DB_PATH"
  exit 1
fi

mkdir -p backups
TIMESTAMP=$(date +"%Y%m%d-%H%M%S")
DESTINATION="backups/app-$TIMESTAMP.db"

cp "$DB_PATH" "$DESTINATION"
echo "备份已创建：$DESTINATION"