package cmd

import (
	"flag"
	"fmt"
	"strings"
)

type Runner interface {
	Parse([]string) error
	Name() string
	Run() error
}

func SpruceUsage() {
	usage := `A tool for building CVs

Usage:
  spruce [flags]
  spruce [command]

Available Commands:
  create    create a new CV JSON file
  generate  generate a PDF file from an existing CV JSON file
  version   print the application's build information

Flags:
  -h, --help
        print the help message for spruce

Use "spruce [command] --help" for more information about a command.
`

	fmt.Print(usage)
}

func usageFunc(name, summary string, flagset *flag.FlagSet) func() {
	return func() {
		var b strings.Builder

		w := flag.CommandLine.Output()

		fmt.Fprintf(&b, "%s\n\nUsage:\n  spruce %s [flags]\n\nFlags:", summary, name)

		flagset.VisitAll(func(f *flag.Flag) {
			fmt.Fprintf(&b, "\n  --%s\n        %s\n", f.Name, f.Usage)
		})

		fmt.Fprint(w, b.String())
	}
}