import { Dispatch, SetStateAction } from "react"
import { notification } from 'antd';

const notificationTypeDictionary = new Map([
  ['error', {notifyInstance: notification.error, caption: 'Ошибка'}],
  ['warning', {notifyInstance: notification.warning, caption: 'Предупреждение'}],
  ['info', {notifyInstance: notification.info, caption: 'Инфо'}],
  ['open', {notifyInstance: notification.info, caption: ''}],
])

/**
 * Вызов оповещений всплывающим окошком.
 * @param body string или ReactNode
 * @param notifyType для параметра типа. Допустимые значение 'error', 'warning', 'info'
 */
export const notify = (body: string|any, notifyType:string ='info', other?: any) => {
  if(!body) 
    return
  const instance = notificationTypeDictionary.get(notifyType) ?? 
    notificationTypeDictionary.get('open')

  instance?.notifyInstance({
    description: body,
    message: instance.caption,
    placement: "bottomRight",
    duration: 10,
    ...other
  })
}

type asyncFunction = (...args:any) => Promise<any|void>;

export const invokeWebApiWrapperAsync = async (funcAsync: asyncFunction, setShowLoader: Dispatch<SetStateAction<boolean>>, errorNotifyText: string) => {
  if(setShowLoader)
    setShowLoader(true)
  try{
    await funcAsync()
  } catch (ex) {
    if(process.env.NODE_ENV === 'development')
      console.error(ex)
    if(errorNotifyText)
      notify(errorNotifyText, 'error')
  } finally{
    if(setShowLoader)
      setShowLoader(false)
  }
}

export const download = async (url:string, fileName?:string) => {
  const response = await fetch(url, {
    headers: {
      Authorization: 'Bearer ' + localStorage['token']
    },
    method: 'Get'
  })
  if(response.status !== 200)
    throw response
  const requestFileName = decodeURI(fileName
    ??response.headers
      .get('content-disposition')
      ?.split(';')
      .splice(-1)[0]
      .split("'")
      .splice(-1)[0]
      ?? url.replace('\\','/')
      .split('/')
      .splice(-1)[0]
      ?? 'file')
  const blob = await response.blob()
  const reader = new FileReader();
  reader.readAsDataURL(blob);
  reader.onload = function (e) {
    let a = document.createElement('a');
    a.href = (e.target?.result?.toString() ?? '');
    a.download = requestFileName;
    document.body.appendChild(a); // we need to append the element to the dom -> otherwise it will not work in firefox
    a.click();    
    a.remove();
  };
}

export const upload = async (url:string, formData: FormData) => {
  await fetch(url, {
    headers: {
      Authorization: 'Bearer ' + localStorage['token']
    },
    method: 'Post',
    body: formData,
  })
}

export const formatBytes = (bytes:number) => {  
  if(bytes < 1024)
    return `${bytes.toFixed(0)}b`
  if(bytes < 1024*1024)
    return `${(bytes/1024).toFixed(2)}kb`
  else
    return `${(bytes/1024/1024).toFixed(2)}Mb`
}