package nomino

import "fmt"

// Make generates a random filename. The behavior can be controlled by specifying Options
// In general, the final filename will be [prefix]_[generated_string]_[original_filename]_[suffix].[extension].
// If the name generator returns an error (generally, it shouldn't), that will be returned instead.
func Make(conf Config, opts ...Option) (string, error) {
	for _, opt := range opts {
		opt(&conf)
	}

	name, err := conf.generator(&conf)
	if err != nil {
		return "", err
	}
	seperateConf(&conf)

	return fmt.Sprintf("%s%s%s%s%s", conf.prefix, name, conf.original, conf.suffix, conf.extension), nil
}

func seperateConf(conf *Config) {
	if conf.prefix != "" {
		conf.prefix += conf.separator
	}
	if conf.original != "" {
		conf.original = conf.separator + conf.original
	}
	if conf.suffix != "" {
		conf.suffix = conf.separator + conf.suffix
	}
}