import React from 'react';
import {StaticRouter} from 'react-router-dom';
import ReactDOMServer from 'react-dom/server';
import Helmet from 'react-helmet';
import App from './App';
import prerender from './prerender';
import routes from '@generated/routes'; // eslint-disable-line
import webpackClientStats from '@build/client.stats.json'; //eslint-disable-line
// Renderer for static-site-generator-webpack-plugin (async rendering via promises)
export default function render(locals) {
return prerender(routes, locals.path).then(() => {
const context = {};
const appHtml = ReactDOMServer.renderToString(
<StaticRouter location={locals.path} context={context}>
<App />
</StaticRouter>
);
const helmet = Helmet.renderStatic();
const htmlAttributes = helmet.htmlAttributes.toString();
const bodyAttributes = helmet.bodyAttributes.toString();
const metaStrings = [
helmet.title.toString(),
helmet.meta.toString(),
helmet.link.toString()
];
const metaHtml = metaStrings.filter(Boolean).join('\n ');
const assets = webpackClientStats.assetsByChunkName.main;
const jsFiles = assets.filter(value => value.match(/\.js$/));
const cssFiles = assets.filter(value => value.match(/\.css$/));
const {baseUrl} = locals;
const html = `
<!DOCTYPE html>
<html${htmlAttributes ? ` ${htmlAttributes}` : ''}>
<head>
${metaHtml}
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
${cssFiles.map(
cssFile =>
`<link rel="stylesheet" type="text/css" href="${baseUrl}${cssFile}" />`
)}
</head>
<body${bodyAttributes ? ` ${bodyAttributes}` : ''}>
<div id="app">${appHtml}</div>
${jsFiles.map(
jsFile =>
`<script type="text/javascript" src="${baseUrl}${jsFile}"></script>`
)}
</body>
</html>
`;
return html;
});
}