import { createStore, applyMiddleware, compose } from 'redux'
import thunk from 'redux-thunk'
import DevTools from './modules/App/components/DevTools'
import rootReducer from './reducers'

export default function configureStore(initialState) {

  const enhancers = [
    applyMiddleware(thunk),
  ];

  if (process.env.CLIENT && process.env.NODE_ENV === 'development') {
    // Enable DevTools only when rendering on client and during development.
    enhancers.push(window.devToolsExtension ? window.devToolsExtension() : DevTools.instrument());
  }

  const store = createStore(
    rootReducer,
    initialState,
    compose(...enhancers)
  )

  if (module.hot) {
    // Enable Webpack hot module replacement for reducers
    module.hot.accept('./reducers', () => {
      const nextRootReducer = require('./reducers').default
      store.replaceReducer(nextRootReducer)
    })
  }

  return store
}