package cmd

import (
	"fmt"
	"io"
	"os"

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

var startAll bool

var startCmd = &cobra.Command{
	Use:   "start <name> | --all",
	Short: "Start a unit by name (or all with --all)",
	Long: `Start starts the named installed unit without enabling it at boot.

With --all (same as 'startall') it starts every enabled, installed unit in
startup order: equal 'order' values in parallel, groups one after another.
'delay' is waited inside the generated service.`,
	Args: nameOrAll(&startAll),
	RunE: func(cmd *cobra.Command, args []string) error {
		cfg, ini, err := loadInit()
		if err != nil {
			return err
		}
		if startAll {
			bulkStart(cfg, ini, os.Stdout, initsys.Init.Start, "started")
			return nil
		}
		return startOne(cfg, ini, args[0], os.Stdout)
	},
}

func init() {
	startCmd.Flags().BoolVar(&startAll, "all", false, "start all enabled, installed units")
	rootCmd.AddCommand(startCmd)
}

func startOne(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, "  ▶ starting %s...\n", ini.ServiceName(*u, cfg.Prefix, cfg.Suffix))
	if err := ini.Start(*u, cfg.Prefix, cfg.Suffix); err != nil {
		return err
	}
	fmt.Fprintf(w, "  ✓ started: %s\n", name)
	return nil
}