import { hasOwn } from '../_util/utils';

function getError(action, option, xhr) {
  let msg;
  if (xhr.response) {
    msg = `${xhr.response.error || xhr.response}`;
  } else if (xhr.responseText) {
    msg = `${xhr.responseText}`;
  } else {
    msg = `fail to post ${action} ${xhr.status}`;
  }
  const err = new Error(msg);
  err.status = xhr.status;
  err.method = 'post';
  err.url = action;
  return err;
}
function getBody(xhr) {
  const text = xhr.responseText || xhr.response;
  if (!text) {
    return text;
  }
  try {
    return JSON.parse(text);
  } catch (e) {
    return text;
  }
}
function upload(option) {
  if (typeof XMLHttpRequest === 'undefined') {
    return;
  }
  const xhr = new XMLHttpRequest();
  const action = option.action;
  if (xhr.upload) {
    xhr.upload.onprogress = function progress(e) {
      if (e.total > 0) {
        e.percent = e.loaded / e.total * 100;
      }
      option.onProgress(e);
    };
  }
  const formData = new FormData();
  if (option.data) {
    Object.keys(option.data).forEach(key => {
      formData.append(key, option.data[key]);
    });
  }
  formData.append(option.fileName, option.file, option.file.name);
  xhr.onerror = function error() {
    option.onError(getError(action, option, xhr));
  };
  xhr.onload = function onload() {
    if (xhr.status < 200 || xhr.status >= 300) {
      return option.onError(getError(action, option, xhr));
    }
    if (option.transformResponse) {
      try {
        option.onSuccess(option.transformResponse(xhr));
      } catch (e) {
        const msg = (e === null || e === void 0 ? void 0 : e.message) || `fail to post ${action} ${xhr.status}`;
        const err = new Error(msg);
        err.status = xhr.status;
        err.method = 'post';
        err.url = action;
        option.onError(err);
      }
    } else {
      option.onSuccess(getBody(xhr));
    }
  };
  xhr.open('post', action, true);
  if (option.withCredentials && 'withCredentials' in xhr) {
    xhr.withCredentials = true;
  }
  if (option.timeout) {
    xhr.timeout = option.timeout;
  }
  const headers = option.headers || {};
  Object.keys(headers).forEach(item => {
    if (hasOwn(headers, item) && headers[item] !== null) {
      xhr.setRequestHeader(item, headers[item]);
    }
  });
  xhr.send(formData);
  return xhr;
}

export { upload as default };
