package config

import (
	"local/storage"
	"os"
)

func New() error {
	config = Config{
		db:               orEnv(storage.MAP.String(), "DB", "DATABASE"),
		Addr:             orEnv("", "ADDR", "FILE"),
		Username:         orEnv("", "USER", "USERNAME"),
		Password:         orEnv("", "PASS", "PASSWORD"),
		Port:             orEnv("21412", "PORT", "LISTEN"),
		DefaultNamespace: orEnv(storage.DefaultNamespace, "NS", "NAMESPACE"),
	}
	storage.DefaultNamespace = config.DefaultNamespace
	DB, err := storage.New(storage.TypeFromString(config.db), config.Addr, config.Username, config.Password)
	config.DB = DB
	return err
}

func orEnv(def, key string, keys ...string) string {
	for _, key := range append(keys, key) {
		if v, ok := os.LookupEnv(key); ok {
			return v
		}
	}
	return def
}