package cmd

import (
	"os"
	"fmt"
	//"log"
	"time"
)


// Internal usage only
func updateJail(jail *Jail) error {
	// Create default config as temporary file
	cfgFile, err := os.CreateTemp("", "gocage-jail-update-")
	if err != nil {
		return err
	}

	cfgFile.Write([]byte(fbsdUpdateConfig))

	defer cfgFile.Close()
	defer os.Remove(cfgFile.Name())

	// Folder containing update/uipgrade temporary files. Common so we save bandwith when upgrading multiple jails
	// TODO: Variabilize /iocage/freebsd-update
	_, err = os.Stat("/iocage/freebsd-update")
	if os.IsNotExist(err) {
		if err := os.Mkdir("/iocage/freebsd-update", 0755); err != nil {
			return err
		}
	}

	cmd := fmt.Sprintf("/usr/sbin/freebsd-update --not-running-from-cron -f %s -b %s --currently-running %s fetch install", 
					   cfgFile.Name(), jail.RootPath, jail.Config.Release)

	//fmt.Printf("DEBUG: Prepare to execute \"%s\"\n", cmd)

	err = executeCommandWithOutputToStdout(cmd)
	if err != nil {
		return err
	}

	// Get and write new release into config.json
	updateVersion(jail)

	return nil
}

func UpdateJail(args []string) {
	// Current jail were stopping
	var cj *Jail
	var err error

	for _, a := range args {
		// Check if jail exist and is distinctly named
		cj, err = getJailFromArray(a, []string{""}, gJails)
		if err != nil {
			fmt.Printf("Error getting jail: %s\n", err)
			continue
		}
		
		fmt.Printf("  > Snapshot jail %s\n", cj.Name)
		// Set snapshot name
		dt := time.Now()
		curDate := fmt.Sprintf("%s", dt.Format("2006-01-02_15-04-05"))
		gSnapshotName = fmt.Sprintf("goc_update_%s_%s", cj.Config.Release, curDate)
		err := createJailSnapshot(*cj)
		if err != nil {
			fmt.Printf("  > Snapshot jail %s: ERROR: %s\n", cj.Name, err.Error())
			return
		}
		fmt.Printf("  > Snapshot jail %s: OK\n", cj.Name)
		
		fmt.Printf("  > Update jail %s\n", cj.Name)
		err = updateJail(cj)
		if err != nil {
			fmt.Printf("ERROR: %s\n", err.Error())
		} else {
			fmt.Printf("  > Update jail %s: OK\n", cj.Name)
		}
	}
}