/*
 * AdminPage
 *
 * This is the first thing users see of our AdminPage, at the '/' route
 *
 * NOTE: while this component should technically be a stateless functional
 * component (SFC), hot reloading does not currently support SFCs. If hot
 * reloading is not a neccessity for you then you can refactor it and remove
 * the linting exception.
 */

import React from 'react';
import ReactGA from 'react-ga';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';
import { createStructuredSelector } from 'reselect';
import { Switch, Route } from 'react-router-dom';
import { get, includes, isFunction, map, omit } from 'lodash';
import { compose } from 'redux';

// Actions required for disabling and enabling the OverlayBlocker
import {
  disableGlobalOverlayBlocker,
  enableGlobalOverlayBlocker,
} from 'actions/overlayBlocker';

import { pluginLoaded, updatePlugin } from 'containers/App/actions';
import {
  makeSelectBlockApp,
  makeSelectShowGlobalAppBlocker,
  selectHasUserPlugin,
  selectPlugins,
} from 'containers/App/selectors';

import { hideNotification } from 'containers/NotificationProvider/actions';

// Design
import ComingSoonPage from 'containers/ComingSoonPage';
import Content from 'containers/Content';
import LocaleToggle from 'containers/LocaleToggle';
import CTAWrapper from 'components/CtaWrapper';
import Header from 'components/Header/index';
import HomePage from 'containers/HomePage/Loadable';
import InstallPluginPage from 'containers/InstallPluginPage/Loadable';
import LeftMenu from 'containers/LeftMenu';
import ListPluginsPage from 'containers/ListPluginsPage/Loadable';
import Logout from 'components/Logout';
import NotFoundPage from 'containers/NotFoundPage/Loadable';
import OverlayBlocker from 'components/OverlayBlocker';
import PluginPage from 'containers/PluginPage/Loadable';

// Utils
import auth from 'utils/auth';
import injectReducer from 'utils/injectReducer';
import injectSaga from 'utils/injectSaga';

import { getGaStatus, getLayout } from './actions';
import reducer from './reducer';
import saga from './saga';
import selectAdminPage from './selectors';

import styles from './styles.scss';

const PLUGINS_TO_BLOCK_PRODUCTION = ['content-type-builder', 'settings-manager'];

export class AdminPage extends React.Component { // eslint-disable-line react/prefer-stateless-function
  state = { hasAlreadyRegistereOtherPlugins: false };

  getChildContext = () => (
    {
      disableGlobalOverlayBlocker: this.props.disableGlobalOverlayBlocker,
      enableGlobalOverlayBlocker: this.props.enableGlobalOverlayBlocker,
      plugins: this.props.plugins,
      updatePlugin: this.props.updatePlugin,
    }
  );

  componentDidMount() {
    this.checkLogin(this.props);
    this.props.getGaStatus();
    this.props.getLayout();
    ReactGA.initialize('UA-54313258-9');
  }

  componentWillReceiveProps(nextProps) {
    if (nextProps.location.pathname !== this.props.location.pathname) {
      this.checkLogin(nextProps);

      if (nextProps.adminPage.allowGa) {
        ReactGA.pageview(nextProps.location.pathname);
      }
    }

    if (get(nextProps.plugins.toJS(), ['users-permissions', 'hasAdminUser']) !== get(this.props.plugins.toJS(), ['users-permissions', 'hasAdminUser'])) {
      this.checkLogin(nextProps, true);
    }

    if (!this.hasUserPluginLoaded(this.props) && this.hasUserPluginLoaded(nextProps)) {
      this.checkLogin(nextProps);
    }
  }

  checkLogin = (props, skipAction = false) => {
    if (props.hasUserPlugin && this.isUrlProtected(props) && !auth.getToken()) {
      if (!this.hasUserPluginLoaded(props)) {
        return;
      }

      const endPoint = this.hasAdminUser(props) ? 'login': 'register';
      this.props.history.push(`/plugins/users-permissions/auth/${endPoint}`);
    }

    if (!this.isUrlProtected(props) && includes(props.location.pathname, 'auth/register') && this.hasAdminUser(props) && !skipAction) {
      this.props.history.push('/plugins/users-permissions/auth/login');
    }

    if (props.hasUserPlugin && !this.isUrlProtected(props) && !includes(props.location.pathname, 'auth/register') && !this.hasAdminUser(props)) {
      this.props.history.push('/plugins/users-permissions/auth/register');
    }

    if (!props.hasUserPlugin || auth.getToken() && !this.state.hasAlreadyRegistereOtherPlugins) {
      map(omit(this.props.plugins.toJS(), ['users-permissions', 'email']), plugin => {
        switch (true) {
          case isFunction(plugin.bootstrap) && isFunction(plugin.pluginRequirements):
            plugin.pluginRequirements(plugin)
              .then(plugin => {
                return plugin.bootstrap(plugin);
              })
              .then(plugin => this.props.pluginLoaded(plugin));
            break;
          case isFunction(plugin.pluginRequirements):
            plugin.pluginRequirements(plugin).then(plugin => this.props.pluginLoaded(plugin));
            break;
          case isFunction(plugin.bootstrap):
            plugin.bootstrap(plugin).then(plugin => this.props.pluginLoaded(plugin));
            break;
          default:
        }
      });

      this.setState({ hasAlreadyRegistereOtherPlugins: true });
    }
  }

  hasUserPluginLoaded = (props) => typeof get(props.plugins.toJS(), ['users-permissions', 'hasAdminUser']) !== 'undefined';

  hasAdminUser = (props) => get(props.plugins.toJS(), ['users-permissions', 'hasAdminUser']);

  isUrlProtected = (props) => !includes(props.location.pathname, get(props.plugins.toJS(), ['users-permissions', 'nonProtectedUrl']));

  shouldDisplayLogout = () => auth.getToken() && this.props.hasUserPlugin && this.isUrlProtected(this.props);

  showLeftMenu = () => !includes(this.props.location.pathname, 'users-permissions/auth/');

  retrievePlugins = () => {
    const { adminPage: { currentEnvironment }, plugins } = this.props;

    if (currentEnvironment === 'production') {
      let pluginsToDisplay = plugins;
      PLUGINS_TO_BLOCK_PRODUCTION.map(plugin =>
        pluginsToDisplay = pluginsToDisplay.delete(plugin));

      return pluginsToDisplay;
    }

    return plugins;
  }

  render() {
    const { adminPage } = this.props;
    const header = this.showLeftMenu() ? <Header /> : '';
    const style = this.showLeftMenu() ? {} : { width: '100%' };

    return (
      <div className={styles.adminPage}>
        {this.showLeftMenu() && (
          <LeftMenu
            plugins={this.retrievePlugins()}
            layout={adminPage.layout}
            version={adminPage.strapiVersion}
          />
        )}
        <CTAWrapper>
          {this.shouldDisplayLogout() && <Logout />}
          <LocaleToggle isLogged={this.shouldDisplayLogout() === true} />
        </CTAWrapper>
        <div className={styles.adminPageRightWrapper} style={style}>
          {header}
          <Content {...this.props} showLeftMenu={this.showLeftMenu()}>
            <Switch>
              <Route path="/" component={HomePage} exact />
              <Route path="/plugins/:pluginId" component={PluginPage} />
              <Route path="/plugins" component={ComingSoonPage} />
              <Route path="/list-plugins" component={ListPluginsPage} exact />
              <Route path="/install-plugin" component={InstallPluginPage} exact />
              <Route path="/configuration" component={ComingSoonPage} exact />
              <Route path="" component={NotFoundPage} />
              <Route path="404" component={NotFoundPage} />
            </Switch>
          </Content>
        </div>
        <OverlayBlocker isOpen={this.props.blockApp && this.props.showGlobalAppBlocker} />
      </div>
    );
  }
}

AdminPage.childContextTypes = {
  disableGlobalOverlayBlocker: PropTypes.func,
  enableGlobalOverlayBlocker: PropTypes.func,
  plugins: PropTypes.object,
  updatePlugin: PropTypes.func,
};

AdminPage.contextTypes = {
  router: PropTypes.object.isRequired,
};

AdminPage.defaultProps = {
  adminPage: {},
  hasUserPlugin: true,
};

AdminPage.propTypes = {
  adminPage: PropTypes.object,
  blockApp: PropTypes.bool.isRequired,
  disableGlobalOverlayBlocker: PropTypes.func.isRequired,
  enableGlobalOverlayBlocker: PropTypes.func.isRequired,
  getGaStatus: PropTypes.func.isRequired,
  getLayout: PropTypes.func.isRequired,
  hasUserPlugin: PropTypes.bool,
  history: PropTypes.object.isRequired,
  location: PropTypes.object.isRequired,
  pluginLoaded: PropTypes.func.isRequired,
  plugins: PropTypes.object.isRequired,
  showGlobalAppBlocker: PropTypes.bool.isRequired,
  updatePlugin: PropTypes.func.isRequired,
};

const mapStateToProps = createStructuredSelector({
  adminPage: selectAdminPage(),
  blockApp: makeSelectBlockApp(),
  hasUserPlugin: selectHasUserPlugin(),
  plugins: selectPlugins(),
  showGlobalAppBlocker: makeSelectShowGlobalAppBlocker(),
});

function mapDispatchToProps(dispatch) {
  return {
    disableGlobalOverlayBlocker: () => { dispatch(disableGlobalOverlayBlocker()); },
    enableGlobalOverlayBlocker: () => { dispatch(enableGlobalOverlayBlocker()); },
    getGaStatus: () => { dispatch(getGaStatus()); },
    getLayout: () => { dispatch(getLayout()); },
    onHideNotification: (id) => { dispatch(hideNotification(id)); },
    pluginLoaded: (plugin) => { dispatch(pluginLoaded(plugin)); },
    updatePlugin: (pluginId, updatedKey, updatedValue) => { dispatch(updatePlugin(pluginId, updatedKey, updatedValue)); },
    dispatch,
  };
}

const withConnect = connect(mapStateToProps, mapDispatchToProps);
const withReducer = injectReducer({ key: 'adminPage', reducer });
const withSaga = injectSaga({ key: 'adminPage', saga });

export default compose(
  withReducer,
  withSaga,
  withConnect,
)(AdminPage);

// export default connect(mapStateToProps, mapDispatchToProps)(AdminPage);