package cmd

import (
	"fmt"
	"time"

	"github.com/lerko/nib/internal/db"
	"github.com/spf13/cobra"
)

var backupCmd = &cobra.Command{
	Use:   "backup [path]",
	Short: "create a safe backup of the database",
	Long:  "Creates an atomic backup using VACUUM INTO. Safe with WAL mode — no need to stop the server.",
	Args:  cobra.MaximumNArgs(1),
	RunE:  runBackup,
}

func init() {
	rootCmd.AddCommand(backupCmd)
}

func runBackup(cmd *cobra.Command, args []string) error {
	srcPath, err := db.DefaultPath()
	if err != nil {
		return err
	}

	dst := fmt.Sprintf("%s.backup-%s", srcPath, time.Now().Format("20060102-150405.000"))
	if len(args) > 0 {
		dst = args[0]
	}

	store, err := db.Open(srcPath)
	if err != nil {
		return err
	}
	defer store.Close()

	if err := store.Backup(dst); err != nil {
		return fmt.Errorf("backup failed: %w", err)
	}

	fmt.Printf("backed up to %s\n", dst)
	return nil
}