package config

import (
	"flag"
	"fmt"
	"os"
	"strings"
)

const cdbpath = "DBPath"
const port = "port"

type Config struct {
	DBPath string
	Port   string
}

func New() *Config {
	lookups := make(map[string]*string)
	add(cdbpath, "./db", lookups)
	add(port, ":9101", lookups)
	flag.Parse()
	return &Config{
		DBPath: *lookups[cdbpath],
		Port:   *lookups[port],
	}
}

func (c *Config) String() string {
	return fmt.Sprintf("Port:%q, DBPath:%q", c.Port, c.DBPath)
}

func add(key string, value string, lookups map[string]*string) {
	env := os.Getenv(strings.ToUpper(key))
	if env != "" {
		value = env
	}
	lookups[key] = flag.String(key, value, "")
}