package main

import (
	"github.com/alecthomas/kingpin/v2"
)

type configuration struct {
	casDirectory             string
	applicationListenAddress string
	metricsListenAddress     string
}

func parseConfiguration(args []string) *configuration {
	config := &configuration{}
	app := kingpin.New("ocspcrl", "OCSP responder / CRL server (multi-CA)")
	app.HelpFlag.Short('h')
	app.Flag("cas-directory", "Path to a directory containing one subdirectory per CA. Each subdirectory must contain ca.crt, responder.crt, key.pem and crl.pem. The subdirectory name is used as the route prefix.").
		Envar("CAS_DIRECTORY").Required().ExistingDirVar(&config.casDirectory)
	app.Flag("web.listen-address", "Address for application endpoint").
		Envar("WEB_LISTEN_ADDRESS").Default(":8080").StringVar(&config.applicationListenAddress)
	app.Flag("metrics.listen-address", "Address for metrics endpoint").
		Envar("METRICS_LISTEN_ADDRESS").Default("[::1]:8081").StringVar(&config.metricsListenAddress)
	kingpin.MustParse(app.Parse(args))
	return config
}