import 'react-hot-loader/patch'

import ReactReconciler from 'react-dom/lib/ReactReconciler'

import initOnDemandEntries from './on-demand-entries-client'

import initWebpackHMR from './webpack-hot-middleware-client'

const next = window.next = require('./')

next.default()

.then((emitter) => {

initOnDemandEntries()

initWebpackHMR()

let lastScroll

emitter.on('before-reactdom-render', ({ Component, ErrorComponent }) => {

// Remember scroll when ErrorComponent is being rendered to later restore it

if (!lastScroll && Component === ErrorComponent) {

const { pageXOffset, pageYOffset } = window

lastScroll = {

x: pageXOffset,

y: pageYOffset

}

}

})

emitter.on('after-reactdom-render', ({ Component, ErrorComponent }) => {

if (lastScroll && Component !== ErrorComponent) {

// Restore scroll after ErrorComponent was replaced with a page component by HMR

const { x, y } = lastScroll

window.scroll(x, y)

lastScroll = null

}

})

})

.catch((err) => {

console.error(`${err.message}\n${err.stack}`)

})

// This is a patch to catch most of the errors throw inside React components.

const originalMountComponent = ReactReconciler.mountComponent

ReactReconciler.mountComponent = function (...args) {

}