import "dotenv/config";
import ms from "ms";

export const DB_TYPE = process.env.DB_TYPE ?? "mysql";
export const DB_HOST = process.env.DB_HOST ?? "";
export const DB_PORT = Number(process.env.DB_PORT ?? 3306);
export const DB_NAME = process.env.DB_NAME ?? "";
export const DB_USERNAME = process.env.DB_USERNAME ?? "";
export const DB_PASSWORD = process.env.DB_PASSWORD ?? "";

export const SERVER_PORT = Number(process.env.SERVER_PORT ?? 5000);

export const JWT_SECRET = process.env.JWT_SECRET ?? "my_jwt_secret_string_ilughfnadiuhgq§$IUZGFVRweiouarbt1oub3h5q4a";
export const JWT_EXPIRATION = process.env.JWT_EXPIRATION ?? "15m";
export const REFRESH_EXPIRATION = process.env.REFRESH_EXPIRATION ?? "1d";
export const PWA_REFRESH_EXPIRATION = process.env.PWA_REFRESH_EXPIRATION ?? "5d";

export const MAIL_USERNAME = process.env.MAIL_USERNAME ?? "";
export const MAIL_PASSWORD = process.env.MAIL_PASSWORD ?? "";
export const MAIL_HOST = process.env.MAIL_HOST ?? "";
export const MAIL_PORT = Number(process.env.MAIL_PORT ?? "587");
export const MAIL_SECURE = process.env.MAIL_SECURE ?? "false";

export const CLUB_NAME = process.env.CLUB_NAME ?? "FF Admin";
export const CLUB_WEBSITE = process.env.CLUB_WEBSITE ?? "";

export const BACKUP_INTERVAL = Number(process.env.BACKUP_INTERVAL ?? "1");
export const BACKUP_COPIES = Number(process.env.BACKUP_COPIES ?? "7");
export const BACKUP_AUTO_RESTORE = process.env.BACKUP_AUTO_RESTORE ?? "true";

export const USE_SECURITY_STRICT_LIMIT = process.env.USE_SECURITY_STRICT_LIMIT ?? "true";
export const SECURITY_STRICT_LIMIT_WINDOW = process.env.SECURITY_STRICT_LIMIT_WINDOW ?? "15m";
export const SECURITY_STRICT_LIMIT_REQUEST_COUNT = Number(process.env.SECURITY_STRICT_LIMIT_REQUEST_COUNT ?? "15");
export const USE_SECURITY_LIMIT = process.env.USE_SECURITY_LIMIT ?? "true";
export const SECURITY_LIMIT_WINDOW = process.env.SECURITY_LIMIT_WINDOW ?? "1m";
export const SECURITY_LIMIT_REQUEST_COUNT = Number(process.env.SECURITY_LIMIT_REQUEST_COUNT ?? "500");

export function configCheck() {
  if (DB_TYPE != "mysql" && DB_TYPE != "sqlite" && DB_TYPE != "postgres")
    throw new Error("set valid value to DB_TYPE (mysql|sqlite|postgres)");
  if ((DB_HOST == "" || typeof DB_HOST != "string") && DB_TYPE != "sqlite")
    throw new Error("set valid value to DB_HOST");
  if (DB_NAME == "" || typeof DB_NAME != "string") throw new Error("set valid value to DB_NAME");
  if ((DB_USERNAME == "" || typeof DB_USERNAME != "string") && DB_TYPE != "sqlite")
    throw new Error("set valid value to DB_USERNAME");
  if ((DB_PASSWORD == "" || typeof DB_PASSWORD != "string") && DB_TYPE != "sqlite")
    throw new Error("set valid value to DB_PASSWORD");

  if (typeof SERVER_PORT != "number") throw new Error("set valid numeric value to SERVER_PORT");

  if (JWT_SECRET == "" || typeof JWT_SECRET != "string") throw new Error("set valid value to JWT_SECRET");
  checkMS(JWT_EXPIRATION, "JWT_EXPIRATION");
  checkMS(REFRESH_EXPIRATION, "REFRESH_EXPIRATION");
  checkMS(PWA_REFRESH_EXPIRATION, "PWA_REFRESH_EXPIRATION");

  if (MAIL_USERNAME == "" || typeof MAIL_USERNAME != "string") throw new Error("set valid value to MAIL_USERNAME");
  if (MAIL_PASSWORD == "" || typeof MAIL_PASSWORD != "string") throw new Error("set valid value to MAIL_PASSWORD");
  if (MAIL_HOST == "" || typeof MAIL_HOST != "string") throw new Error("set valid value to MAIL_HOST");
  if (typeof MAIL_PORT != "number") throw new Error("set valid numeric value to MAIL_PORT");
  if (MAIL_SECURE != "true" && MAIL_SECURE != "false") throw new Error("set 'true' or 'false' to MAIL_SECURE");

  if (
    CLUB_WEBSITE != "" &&
    !/^(http(s):\/\/.)[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=]*)$/.test(CLUB_WEBSITE)
  )
    throw new Error("CLUB_WEBSITE is not valid url");

  if (BACKUP_AUTO_RESTORE != "true" && BACKUP_AUTO_RESTORE != "false")
    throw new Error("set 'true' or 'false' to BACKUP_AUTO_RESTORE");
  if (BACKUP_INTERVAL < 1) throw new Error("BACKUP_INTERVAL has to be at least 1");
  if (BACKUP_COPIES < 1) throw new Error("BACKUP_COPIES has to be at least 1");

  if (USE_SECURITY_STRICT_LIMIT != "true" && USE_SECURITY_STRICT_LIMIT != "false")
    throw new Error("set 'true' or 'false' to USE_SECURITY_STRICT_LIMIT");
  checkMS(SECURITY_STRICT_LIMIT_WINDOW, "SECURITY_STRICT_LIMIT_WINDOW");
  if (typeof SECURITY_STRICT_LIMIT_REQUEST_COUNT != "number")
    throw new Error("set valid numeric value to SECURITY_STRICT_LIMIT_REQUEST_COUNT");
  if (USE_SECURITY_LIMIT != "true" && USE_SECURITY_LIMIT != "false")
    throw new Error("set 'true' or 'false' to USE_SECURITY_LIMIT");
  checkMS(SECURITY_LIMIT_WINDOW, "SECURITY_LIMIT_WINDOW");
  if (typeof SECURITY_LIMIT_REQUEST_COUNT != "number")
    throw new Error("set valid numeric value to SECURITY_LIMIT_REQUEST_COUNT");
}

function checkMS(input: string, origin: string) {
  try {
    const result = ms(input);
    if (result === undefined) {
      throw new Error(`set valid ms value to ${origin} -> [0-9]*(y|d|h|m|s)`);
    }
  } catch (e) {
    throw new Error(`set valid ms value to ${origin} -> [0-9]*(y|d|h|m|s)`);
  }
}