import React, { useState, useRef,useCallback } from 'react';
import {
  ProgressBar,
  Classes,
  Intent,
} from '@blueprintjs/core';
import classNames from 'classnames';
import AppToaster from 'components/AppToaster';
import { saveFilesInAsync } from 'utils';

const useMedia = ({ saveCallback, deleteCallback }) => {
  const [files, setFiles] = useState([]);
  const [deletedFiles, setDeletedFiles] = useState([]);
  const toastKey = useRef(0);

  const openProgressToast = useCallback((amount) => ({
    message: (
      <ProgressBar
        className={classNames("toast-progress", {
          [Classes.PROGRESS_NO_STRIPES]: amount >= 100,
        })}
        intent={amount < 100 ? Intent.PRIMARY : Intent.SUCCESS}
        value={amount / 100}
      />
    ),
  }), []);

  const saveMedia = useCallback(() => { 
    const notUploadedFiles = files.filter((file) => file.uploaded === false);

    if (notUploadedFiles.length > 0) {
      toastKey.current = AppToaster.show(openProgressToast(0));

      const saveAction =  (formData, attachment, progressCallback) => {
        return saveCallback(formData, {
          onUploadProgress: (progress) => { progressCallback(progress); }
        }).then((res) => {
          attachment.uploaded = true;
          return res;
        });
      };
      return saveFilesInAsync(notUploadedFiles, saveAction).onProgress((progress) => {
        if (progress > 0) {
          AppToaster.show(openProgressToast(progress * 100), toastKey.current);
        }
      });
    }
    return Promise.resolve([]);
  }, [files, openProgressToast, saveCallback]);

  const deleteMedia = useCallback(() => {
    return deletedFiles.length > 0
      ? deleteCallback(deletedFiles) : Promise.resolve();
  }, [deletedFiles, deleteCallback]);

  return { files, setFiles, saveMedia, deletedFiles, setDeletedFiles, deleteMedia };
}

export default useMedia;