( function ( mw, Redux, ReduxThunk ) {

	/**
	 * A [null](https://en.wikipedia.org/wiki/Null_Object_pattern) reducer.
	 *
	 * @param {Object} state The current state
	 * @param {Object} action The action that was dispatched against the store
	 * @return {Object} The new state
	 */
	function rootReducer( state, action ) {
		/* jshint unused: false */
		return state;
	}

	mw.requestIdleCallback( function () {
		var compose = Redux.compose,
			store,
			userSettings,
			isUserInCondition;

		// If debug mode is enabled, then enable Redux DevTools.
		if ( mw.config.get( 'debug' ) === true ) {
			compose = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
		}

		store = Redux.createStore(
			rootReducer,
			compose( Redux.applyMiddleware(
				ReduxThunk.default
			) )
		);

		userSettings = mw.popups.createUserSettings(
			mw.storage,
			mw.user
		);
		isUserInCondition = mw.popups.createExperiment(
			mw.config,
			mw.user,
			userSettings
		);

		store.dispatch( mw.popups.actions.boot( isUserInCondition ) );
	} );

}( mediaWiki, Redux, ReduxThunk ) );