package config

import (
	"gelvin/app/application"
	"os"
)

const EnvPrefix = "GELVIN_"

type environment struct {
	Mode    application.Mode
	UrlRoot string
	Version application.Version
}

func Environment() environment {

	var mode application.Mode
	switch getEnv("MODE") {
	case "TEST":
		mode = application.Test
	case "PRODUCTION":
		mode = application.Production
	default:
		mode = application.Debug
	}

	var urlRoot string
	if urlRoot = getEnv("URL_ROOT"); urlRoot == "" {
		urlRoot = "/"
	}

	version := parseVersion(getEnv("API_VERSION"))
	return environment{
		Mode:    mode,
		UrlRoot: urlRoot,
		Version: version,
	}
}

func getEnv(key string) string {
	return os.Getenv(EnvPrefix + key)
}

func parseVersion(s string) application.Version {
	version := application.Version{Major: 1}
	if s != "" {
		// TODO
	}
	return version
}