import React, { Suspense } from 'react';
import { makeStyles, useTheme } from '@material-ui/core/styles';
import { useMediaQuery } from '@material-ui/core';
import { SnackbarProvider } from 'notistack';
import { Switch, Route } from 'react-router-dom';
import Loading from '../components/Loading/Loading';

const ProfilePage = React.lazy(() => import( './ProfilePage/ProfilePage'));
const FeedPage = React.lazy(() => import( './FeedPage/FeedPage'));
const LoginPage = React.lazy(() => import( './LoginPage/LoginPage'));
const RegistrationPage = React.lazy(() => import( './RegistrationPage/RegistrationPage'));
const HomePage = React.lazy(() => import( './HomePage/HomePage'));
const NotificationsPage = React.lazy(() => import( './NotificationsPage/NotificationsPage'));


const useStyles = makeStyles(theme => ({
  root: {
    [theme.breakpoints.down('sm')]: {
      margin: theme.spacing(2, 0, 12, 0)
    },
    [theme.breakpoints.up('md')]: {
      margin: theme.spacing(15, 5, 8, 5)
    }
  }
}));


const Page: React.FC = () => {
  const classes = useStyles();
  const theme = useTheme();
  const isMobile = useMediaQuery(theme.breakpoints.down('sm'));

  return (
    <SnackbarProvider
      maxSnack={3}
      anchorOrigin={{
        vertical: isMobile ? 'top' : 'bottom',
        horizontal: 'right'
      }}
    >
      <div className={classes.root}>
        <Suspense fallback={<Loading />}>
          <Switch>
            <Route exact path="/" component={HomePage} />
            <Route exact path="/login" component={LoginPage} />
            <Route exact path="/registration" component={RegistrationPage} />
            <Route exact path="/feed" component={FeedPage} />
            <Route exact path="/notifications" component={NotificationsPage} />
            <Route path="/profile/:username" component={ProfilePage} />
          </Switch>
        </Suspense>
      </div>
    </SnackbarProvider>
  );
};


export default Page;