package slug

import (
	"strings"
	"unicode"
)

func Make(raw string) string {
	raw = strings.TrimSpace(strings.ToLower(raw))
	var builder strings.Builder
	lastDash := false

	for _, r := range raw {
		switch {
		case unicode.IsLetter(r), unicode.IsDigit(r):
			builder.WriteRune(r)
			lastDash = false
		default:
			if !lastDash && builder.Len() > 0 {
				builder.WriteRune('-')
				lastDash = true
			}
		}
	}

	return strings.Trim(builder.String(), "-")
}