/*
 This file is part of TALER
 (C) 2016 GNUnet e.V.

 TALER is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software
 Foundation; either version 3, or (at your option) any later version.

 TALER is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

 You should have received a copy of the GNU General Public License along with
 TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */
import {
  NotificationType, TalerErrorDetail
} from "@gnu-taler/taler-util";
import { TalerError } from "@gnu-taler/taler-wallet-core";
import { useEffect, useMemo, useState } from "preact/hooks";
import * as wxApi from "../wxApi.js";

export interface HookOk<T> {
  hasError: false;
  response: T;
}

export type HookError = HookGenericError | HookOperationalError;

export interface HookGenericError {
  hasError: true;
  operational: false;
  message: string;
}

export interface HookOperationalError {
  hasError: true;
  operational: true;
  details: TalerErrorDetail;
}

export type HookResponse<T> = HookOk<T> | HookError | undefined;

export function useAsyncAsHook<T>(
  fn: () => Promise<T | false>,
  updateOnNotification?: Array<NotificationType>,
  deps?: any[],
): HookResponse<T> {

  const args = useMemo(() => ({
    fn, updateOnNotification
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }), deps || [])
  const [result, setHookResponse] = useState<HookResponse<T>>(undefined);

  useEffect(() => {
    async function doAsync(): Promise<void> {
      try {
        const response = await args.fn();
        if (response === false) return;
        setHookResponse({ hasError: false, response });
      } catch (e) {
        if (e instanceof TalerError) {
          setHookResponse({
            hasError: true,
            operational: true,
            details: e.errorDetail,
          });
        } else if (e instanceof Error) {
          setHookResponse({
            hasError: true,
            operational: false,
            message: e.message,
          });
        }
      }
    }
    doAsync();
    if (args.updateOnNotification && args.updateOnNotification.length > 0) {
      return wxApi.onUpdateNotification(args.updateOnNotification, () => {
        doAsync();
      });
    }
  }, [args]);
  return result;
}