package internal

import (
	"errors"
	"os"
	"strconv"
)

var (
	SALT         string
	POSTGRES_URL string
	JWT_SECRET   string
	FETCH_LENGTH int32
	PREFORK      bool
	err          error
	conv         int64
)

func ReadFromENV() error {
	SALT = os.Getenv("SALT")
	if len(SALT) < 8 {
		return errors.New("Invalid Salt")
	}
	POSTGRES_URL = os.Getenv("POSTGRES_URL")
	if len(POSTGRES_URL) < 1 {
		return errors.New("POSTGRES_URL NOT FOUND")
	}
	JWT_SECRET = os.Getenv("JWT_SECRET")
	if len(JWT_SECRET) < 10 {
		return errors.New("INVALID JWT SECRET")
	}
	fetch_len_str := os.Getenv("FETCH_LENGTH")
	if len(fetch_len_str) == 0 {
		FETCH_LENGTH = 10
	} else {
		conv, err = strconv.ParseInt(fetch_len_str, 10, 32)
		if err != nil {
			return err
		}
		if conv < 1 {
			return errors.New("FETCH_LENGTH should be a positive number as well over 0")
		}
		FETCH_LENGTH = int32(conv)

	}
	prefork_str := os.Getenv("PREFORK")
	if len(prefork_str) == 0 {
		PREFORK = false
	} else {
		PREFORK, err = strconv.ParseBool(prefork_str)
		if err != nil {
			return err
		}
	}
	return nil
}