const getQueryString = params => {
  return Object.keys(params)
    .map(k => {
      if (Array.isArray(params[k])) {
        return params[k]
          .map(val => `${encodeURIComponent(k)}[]=${encodeURIComponent(val)}`)
          .join("&");
      }

      return `${encodeURIComponent(k)}=${encodeURIComponent(params[k])}`;
    })
    .join("&");
};

const request = params => {
  var method = params.method || "GET";
  var qs = "";
  var body;
  var headers = params.headers || {
    Accept: "application/json",
    "Content-Type": "application/json"
  };

  if (["GET", "DELETE"].indexOf(method) > -1)
    qs = "?" + getQueryString(params.data);
  // POST or PUT
  else body = JSON.stringify(params.data);

  var url = params.url + qs;

  return fetch(url, { method, headers, body }).then(response =>
    response.json()
  // .then(data => ({ status: response.status, data: data }))
  );
};

export default {
  get: params => request(Object.assign({ method: "GET" }, params)),
  post: params => request(Object.assign({ method: "POST" }, params)),
  put: params => request(Object.assign({ method: "PUT" }, params)),
  patch: params => request(Object.assign({ method: "PATCH" }, params)),
  delete: params => request(Object.assign({ method: "DELETE" }, params))
};