package gosimpleconf

import "os"

func Configure(filename string) (ConfigMap, error) {
	var err error

	configMap, err := ReadFile(filename)
	if err != nil {
		return nil, err
	}

	flagMap := SetupFlagOverrides(configMap)
	configMap = ParseFlags(configMap, flagMap)

	return configMap, nil
}

func ConfigureWithDefaults(filename string, defaultConf ConfigMap) (ConfigMap, error) {
	var err error

	_, err = os.Stat(filename)
	if os.IsNotExist(err) {
		// Config file does not exist, return a default configMap
		return defaultConf, nil
	} else if err != nil {
		return nil, err
	}

	return Configure(filename)
}