// @flow
import React from 'react';
import { render } from 'react-dom';
import { Provider } from 'mobx-react';
import {
  BrowserRouter as Router,
  Switch,
  Route,
  Redirect,
} from 'react-router-dom';
import Flex from 'shared/components/Flex';

import stores from 'stores';
import DocumentsStore from 'stores/DocumentsStore';
import CollectionsStore from 'stores/CollectionsStore';
import CacheStore from 'stores/CacheStore';
import globalStyles from 'shared/styles/globals';
import 'shared/styles/prism.css';

import Home from 'scenes/Home';
import Dashboard from 'scenes/Dashboard';
import Starred from 'scenes/Starred';
import Collection from 'scenes/Collection';
import Document from 'scenes/Document';
import Search from 'scenes/Search';
import SlackAuth from 'scenes/SlackAuth';
import Flatpage from 'scenes/Flatpage';
import ErrorAuth from 'scenes/ErrorAuth';
import Error404 from 'scenes/Error404';

import ErrorBoundary from 'components/ErrorBoundary';
import ScrollToTop from 'components/ScrollToTop';
import Layout from 'components/Layout';
import RouteSidebarHidden from 'components/RouteSidebarHidden';

import flatpages from 'static/flatpages';

import { matchDocumentSlug } from 'utils/routeHelpers';

let DevTools;
if (__DEV__) {
  DevTools = require('mobx-react-devtools').default; // eslint-disable-line global-require
}

let authenticatedStores;

type AuthProps = {
  children?: React.Element<any>,
};

const Auth = ({ children }: AuthProps) => {
  if (stores.auth.authenticated && stores.auth.team && stores.auth.user) {
    // Only initialize stores once. Kept in global scope
    // because otherwise they will get overriden on route
    // change
    if (!authenticatedStores) {
      // Stores for authenticated user
      const { user, team } = stores.auth;
      const cache = new CacheStore(user.id);
      authenticatedStores = {
        documents: new DocumentsStore({
          ui: stores.ui,
          cache,
        }),
        collections: new CollectionsStore({
          ui: stores.ui,
          teamId: team.id,
          cache,
        }),
      };

      if (window.Bugsnag) {
        Bugsnag.user = {
          id: user.id,
          name: user.name,
          teamId: team.id,
          team: team.name,
        };
      }

      authenticatedStores.collections.fetchAll();
    }

    return (
      <Flex auto>
        <Provider {...authenticatedStores}>{children}</Provider>
      </Flex>
    );
  } else {
    return <Redirect to="/" />;
  }
};

const notFoundSearch = () => <Search notFound />;
const Api = () => <Flatpage title="API" content={flatpages.api} />;
const DocumentNew = () => <Document newDocument />;
const RedirectDocument = ({ match }: { match: Object }) => (
  <Redirect to={`/doc/${match.params.documentSlug}`} />
);

globalStyles();

render(
  <div style={{ display: 'flex', flex: 1, height: '100%' }}>
    <ErrorBoundary>
      <Provider {...stores}>
        <Router>
          <ScrollToTop>
            <Switch>
              <Route exact path="/" component={Home} />

              <Route exact path="/auth/slack" component={SlackAuth} />
              <Route exact path="/auth/slack/commands" component={SlackAuth} />
              <Route exact path="/auth/error" component={ErrorAuth} />

              <Auth>
                <Layout>
                  <Switch>
                    <Route exact path="/dashboard" component={Dashboard} />
                    <Route exact path="/starred" component={Starred} />
                    <Route
                      exact
                      path="/collections/:id"
                      component={Collection}
                    />
                    <Route
                      exact
                      path={`/d/${matchDocumentSlug}`}
                      component={RedirectDocument}
                    />
                    <Route
                      exact
                      path={`/doc/${matchDocumentSlug}`}
                      component={Document}
                    />
                    <Route
                      exact
                      path={`/doc/${matchDocumentSlug}/move`}
                      component={Document}
                    />

                    <Route exact path="/search" component={Search} />
                    <Route exact path="/search/:query" component={Search} />
                    <Route exact path="/developers" component={Api} />

                    <Route path="/404" component={Error404} />

                    <RouteSidebarHidden
                      exact
                      path={`/doc/${matchDocumentSlug}/edit`}
                      component={Document}
                    />
                    <RouteSidebarHidden
                      exact
                      path="/collections/:id/new"
                      component={DocumentNew}
                    />
                    <Route component={notFoundSearch} />
                  </Switch>
                </Layout>
              </Auth>
            </Switch>
          </ScrollToTop>
        </Router>
      </Provider>
    </ErrorBoundary>
    {DevTools && <DevTools position={{ bottom: 0, right: 0 }} />}
  </div>,
  document.getElementById('root')
);

window.authenticatedStores = authenticatedStores;