/* eslint-disable @typescript-eslint/no-var-requires */
import { AnyAction, applyMiddleware, createStore } from 'redux';
import thunkMiddleware, { ThunkMiddleware } from 'redux-thunk';
import actionCreatorFactory from 'typescript-fsa';
import { reducerWithInitialState } from 'typescript-fsa-reducers';
import { asyncFactory } from './index';

// https://github.com/node-fetch/node-fetch/issues/1266
const fetch = require('node-fetch');

/** You can optionally use custom Error types */
class CustomError extends Error {}

/** Parameters used for logging in */
interface LoginParams {
  email: string;
  password: string;
}

/** The object that comes back from the server on successful login */
interface UserToken {
  token: string;
}

/** The shape of our Redux store's state */
interface State {
  title: string;
  userToken: UserToken;
  loggingIn?: boolean;
  error?: CustomError;
}

/** The typescript-fsa action creator factory function */
const create = actionCreatorFactory('examples');

/** The typescript-fsa-redux-thunk async action creator factory function */
const createAsync = asyncFactory<State>(create);

/** Normal synchronous action */
const changeTitle = create<string>('Change the title');

/** The asynchronous login action; Error type is optional */
const login = createAsync<LoginParams, UserToken, CustomError>(
  'Login',
  async (params, dispatch) => {
    const url = `https://reqres.in/api/login`;
    const options = {
      method: 'POST',
      body: JSON.stringify(params),
      headers: {
        'Content-Type': 'application/json; charset=utf-8',
      },
    };
    const res = await fetch(url, options);
    if (!res.ok) {
      throw new CustomError(`Error ${res.status}: ${res.statusText}`);
    }

    dispatch(changeTitle('You are logged-in'));

    return (await res.json()) as UserToken;
  },
);

/** An initial value for the application state */
const initial: State = {
  title: 'Please login',
  userToken: {
    token: '',
  },
};

/** Reducer, handling updates to indicate logging-in status/error */
const reducer = reducerWithInitialState(initial)
  .case(changeTitle, (state, title) => ({
    ...state,
    title,
  }))
  .case(login.async.started, (state) => ({
    ...state,
    loggingIn: true,
    error: undefined,
  }))
  .case(login.async.failed, (state, { error }) => ({
    ...state,
    loggingIn: false,
    error,
  }))
  .case(login.async.done, (state, { result: userToken }) => ({
    ...state,
    userToken,
    loggingIn: false,
    error: undefined,
  }))
  .build();

/** Putting it all together */
(async () => {
  // Declaring the type of the redux-thunk middleware is what makes
  // `store.dispatch` work. (redux@4.x, redux-thunk@2.3.x)
  const thunk: ThunkMiddleware<State, AnyAction> = thunkMiddleware;
  const store = createStore(reducer, applyMiddleware(thunk));

  console.log(store.getState().title);

  try {
    // See https://reqres.in/api/users for valid users on this site
    await store.dispatch(
      login({
        email: 'eve.holt@reqres.in',
        password: 'cityslicka',
      }),
    );

    const { title, userToken } = store.getState();

    console.log(title, userToken);
  } catch (err) {
    console.log(err);
  }
})();