package config

import (
	"context"
	"local/args"
	"local/storage"
	"os"
)

func New() error {
	as := args.NewArgSet()
	as.Append(args.STRING, "addr", "address/path to database/file", "")
	as.Append(args.STRING, "user", "username to database", "")
	as.Append(args.STRING, "pass", "password to database", "")
	as.Append(args.STRING, "port", "port to listen on", "33419")
	as.Append(args.STRING, "db", "database type code", storage.MAP.String())
	as.Append(args.STRING, "ns", "namespace", storage.DefaultNamespace)
	if err := as.Parse(); err != nil {
		return err
	}
	ctx, can := context.WithCancel(context.Background())
	config = Config{
		db:               as.Get("db").GetString(),
		Addr:             as.Get("addr").GetString(),
		Username:         as.Get("user").GetString(),
		Password:         as.Get("pass").GetString(),
		Port:             as.Get("port").GetString(),
		DefaultNamespace: as.Get("ns").GetString(),
		Ctx:              ctx,
		Can:              can,
	}
	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
}