// @flow strict

import type {
  callbackFuncTypes,
  contentTypes,
  ToastOptions,
} from '../../types/toast';
import {uuid} from '../../utils/helpers';


const DEFAULT_AUTOCLOSE_TIME = 8000; // default auto close time for with autoClose = true (be default true) but timeout not passed.

export const POSITIONS = {
  TOP_CENTER: 'topCenter',
  TOP_LEFT: 'topLeft',
  TOP_RIGHT: 'topRight',
  BOTTOM_LEFT: 'bottomLeft',
  BOTTOM_RIGHT: 'bottomRight',
  BOTTOM_CENTER: 'bottomCenter',
};

export const ACTIONS = {
  ADD: 'ADD',
  REMOVE: 'REMOVE',
};

const defaultOptions: ToastOptions = {
  autoClose: true,
  timeout: DEFAULT_AUTOCLOSE_TIME,
  position: POSITIONS.BOTTOM_LEFT,
};

export const toastManager: {
  add(content: contentTypes, options?: ToastOptions): string,
  remove(id: string): boolean,
  subscribe(callback: callbackFuncTypes): void,
  ...
} = (() => {
  let callbackFn: callbackFuncTypes;

  const manager = {
    subscribe(callback: callbackFuncTypes): void {
      callbackFn = callback;
    },

    add(content: contentTypes, options?: ToastOptions): string {
      const mergedOptions = {...defaultOptions, ...options};
      const toastId = uuid();
      callbackFn &&
        callbackFn(ACTIONS.ADD, content, {...mergedOptions, id: toastId});
      return toastId;
    },

    remove(id: string) {
      callbackFn(ACTIONS.REMOVE, null, {id});
      return true;
    },
  };

  return manager;
})();

export const toastApi = {
  show: (content: contentTypes, options?: ToastOptions): string =>
    toastManager.add(content, options),
  remove: (id: string): boolean => toastManager.remove(id),
};