package authservice

import (
	"flag"
	"fmt"
)

const (
	defaultRulesEngineHost = "rulesengine"
	defaultUserServiceHost = "userservice"
	confUserServiceHost    = "ea-user-service-host"
	confRulesEngineHost    = "ea-rules-engine-host"
	confEdgeAPI            = "edge-api"
)

// Config is a struct that stores the cli or env flags at runtime.
type Config struct {
	UserServiceHost string
	RulesEngineHost string
	EdgeAPI         string
}

// Bind flags updates the flags at runtime when ffparse is called (usually in main)
func (config *Config) BindFlags(flags *flag.FlagSet) {
	flags.StringVar(
		&config.UserServiceHost,
		confUserServiceHost,
		defaultUserServiceHost,
		"IP address at which user service endpoints are hosted",
	)

	flags.StringVar(
		&config.RulesEngineHost,
		confRulesEngineHost,
		defaultRulesEngineHost,
		"IP address at which rules engine endpoints are hosted",
	)

	flags.StringVar(
		&config.EdgeAPI,
		confEdgeAPI,
		config.EdgeAPI,
		"URL of the Edge API to be used to authenticate users.",
	)
}

func (config *Config) Validate() error {
	if config.EdgeAPI == "" {
		return fmt.Errorf("edge api url required")
	}

	return nil
}