export { forceDownload } from './forcedownload';

/**
 *
 * @param obj: simple javascript object, for example, the result returned from formObjToObj()
 */
export function objToParameterUrl(obj) {
  let parameter,
    parameterArray = [];

  for (const p in obj) {
    if (Object.prototype.hasOwnProperty.call(obj, p)) {
      const v = obj[p];
      if (Array.isArray(v)) {
        for (let i = 0; i < v.length; i++) {
          parameter = p + '=' + encodeURIComponent(v[i]);
          parameterArray.push(parameter);
        }
      } else {
        parameter = p + '=' + encodeURIComponent(v);
        parameterArray.push(parameter);
      }
    }
  }

  return parameterArray.join('&');
}

/**
 * @param obj: an object returned from formToObj() method, which adds additional function such as 'hasValue()' to the object
 * return: an uri with special characters encoded, the uri represents all the parameters sent from the form
 */
export function formObjToParameterUrl(obj) {
  let parameter,
    parameterArray = [];

  for (const p in obj) {
    if (Object.prototype.hasOwnProperty.call(obj, p)) {
      const v = obj[p];
      if (Array.isArray(v)) {
        for (let i = 0; i < v.length; i++) {
          if (v[i].hasValue()) {
            parameter = p + '=' + v[i].value;
            parameterArray.push(parameter);
          }
        }
      } else {
        if (v.hasValue()) {
          parameter = p + '=' + v.value;
          parameterArray.push(parameter);
        }
      }
    }
  }

  return encodeURI(parameterArray.join('&'));
}

export function getFutureDateInDays(days) {
  // returns a date that is the number of provided days in the future
  const d = new Date();
  d.setTime(d.getTime() + days * 24 * 60 * 60 * 1000);
  return d;
}

export function getFutureDateInMinutes(minutes) {
  // returns a date that is the number of provided minutes in the future
  const d = new Date();
  d.setTime(d.getTime() + minutes * 60 * 1000);
  return d;
}

export function setCookie(
  cname,
  cvalue,
  path = '/',
  expirationDate = undefined
) {
  /** no return value
   * @cname: {string} cookie name
   * @cvalue {string} cookie value
   * @path: {string} what path the cookie belongs to, by default it belongs to current page
   * @expirationDate {date}
   */
  let cookie = `${cname}=${cvalue};`;

  if (expirationDate) {
    cookie = cookie + 'expires=' + expirationDate.toUTCString();
  }

  cookie = cookie + `;path=${path}`;

  document.cookie = cookie;
}

export function getCookie(cname) {
  /** return cookie value or empty string if nothing found
   * @cname: {string} cookie name
   */
  let i,
    c,
    name = cname + '=',
    ca = document.cookie.split(';');
  for (i = 0; i < ca.length; i++) {
    c = ca[i];
    while (c.charAt(0) == ' ') {
      c = c.substring(1);
    }

    if (c.indexOf(name) == 0) {
      return c.substring(name.length, c.length);
    }
  }

  return '';
}

export function getCookieLayoutObj() {
  const layoutCookie = getCookie('layout');
  let layoutObj;

  try {
    layoutObj = JSON.parse(layoutCookie);
  } catch (e) {
    console.error('Error parsing layout cookie.');
  }

  if (!layoutObj) {
    layoutObj = {};
  }

  return layoutObj;
}

export function setCookieLayoutObj(layoutObj, expirationInMinutes = 30) {
  const expiration = getFutureDateInMinutes(expirationInMinutes);
  setCookie('layout', JSON.stringify(layoutObj), undefined, expiration);
}