package config

import (
	"fmt"
	"local/args"
	"local/storage"
)

type Config struct {
	Addr string
	DB   storage.DB
}

var config Config

func New() error {
	as := args.NewArgSet()
	as.Append(args.INT, "p", "port to listen on", 39981)
	as.Append(args.STRING, "db", "db type to use", "map")
	as.Append(args.STRING, "dbns", "db namespace", "")
	as.Append(args.STRING, "dbaddr", "db's address or path", "")
	as.Append(args.STRING, "dbuser", "db's username", "")
	as.Append(args.STRING, "dbpass", "db's password", "")
	err := as.Parse()
	if err != nil {
		return err
	}
	db, err := storage.New(
		storage.TypeFromString(as.Get("db").GetString()),
		as.Get("dbaddr").GetString(),
		as.Get("dbuser").GetString(),
		as.Get("dbpass").GetString(),
	)
	if err != nil {
		return err
	}
	was := config.DB
	config = Config{
		Addr: fmt.Sprintf(":%d", as.Get("p").GetInt()),
		DB:   db,
	}
	if was != nil {
		was.Close()
	}
	storage.DefaultNamespace = as.Get("dbns").GetString()
	return err
}

func Get() Config {
	return config
}