const fs = require('fs');

const serverEnv = process.env['SERVER_ENV'];

function rspErr(rsp, errCode, errMsg) {
  rsp.send(JSON.stringify({
    'errcode': errCode,
    'errmsg': errMsg
  }));
}

function rspOk(rsp) {
  rsp.send(JSON.stringify({
    'errcode': 0,
    'errmsg': ''
  }));
}

function rspData(rsp, data) {
  data['errcode'] = 0;
  data['errmsg'] = '';
  rsp.send(JSON.stringify(data));
}

function readJsonFromFile(url) {
  let jsondata = fs.readFileSync(url, "utf8");
  let json = JSON.parse(jsondata);
  return json;
}

async function sleep(timeout) {
  return new Promise(function (resolve, reject) {
    setTimeout(function () {
      resolve();
    }, timeout);
  });
}

function emptyReplace(val, newVal) {
  return !val ? newVal : val;
}

function throwError(msg) {
  console.log(msg);
  throw msg;
}

function isOnlineEnv() {
  return !serverEnv;
}

function getUtcTime() {
  return Math.floor((new Date()).getTime() / 1000);
}

exports.rspErr = rspErr;
exports.rspOk = rspOk;
exports.rspData = rspData;
exports.readJsonFromFile = readJsonFromFile;
exports.sleep = sleep;
exports.emptyReplace = emptyReplace;
exports.throwError = throwError;
exports.isOnlineEnv = isOnlineEnv;
exports.getUtcTime = getUtcTime;