package cmd

import (
	"fmt"
	"io"
	"os"

	"github.com/spf13/cobra"
	"github.com/warkanum/unitdore/config"
	"github.com/warkanum/unitdore/initsys"
)

var enableAll bool

var enableCmd = &cobra.Command{
	Use:   "enable <name> | --all",
	Short: "Enable at boot and start a unit (or all with --all)",
	Long: `Enable enables the named installed unit at boot and starts it.

With --all (same as 'enableall') it does so for every enabled, installed unit
in startup order, like 'start --all'.`,
	Args: nameOrAll(&enableAll),
	RunE: func(cmd *cobra.Command, args []string) error {
		cfg, ini, err := loadInit()
		if err != nil {
			return err
		}
		if enableAll {
			bulkStart(cfg, ini, os.Stdout, initsys.Init.Enable, "enabled")
			return nil
		}
		return enableOne(cfg, ini, args[0], os.Stdout)
	},
}

func init() {
	enableCmd.Flags().BoolVar(&enableAll, "all", false, "enable all enabled, installed units")
	rootCmd.AddCommand(enableCmd)
}

func enableOne(cfg *config.Config, ini initsys.Init, name string, w io.Writer) error {
	u, err := installedUnit(cfg, ini, name)
	if err != nil {
		return err
	}
	fmt.Fprintf(w, "  ▶ enabling %s...\n", ini.ServiceName(*u, cfg.Prefix, cfg.Suffix))
	if err := ini.Enable(*u, cfg.Prefix, cfg.Suffix); err != nil {
		return err
	}
	fmt.Fprintf(w, "  ✓ enabled: %s\n", name)
	return nil
}