import express from 'express';
import webpack, {Configuration} from 'webpack';
import middleware from 'webpack-dev-middleware';
import hotMiddleware from 'webpack-hot-middleware';
import {rootPath, runPath, evalJs, readConfigSync} from './lib';

process.env.NODE_ENV = process.env.NODE_ENV || 'production';

const {NODE_ENV} = process.env;
const config = readConfigSync();
export default function server(mode = NODE_ENV) {
  const app = express();
  if(mode === 'development'){
    const webpackOptions = evalJs(rootPath('./webpack.config.js')) as Configuration;
    const compiler = webpack(webpackOptions);
    app.use(middleware(compiler, {
      publicPath: webpackOptions && webpackOptions.output && webpackOptions.output.publicPath || '/'
    }));
    app.use(hotMiddleware(compiler, {
      log: console.log, path: '/__webpack_hmr', heartbeat: 10 * 1000
    }));
    (config.static || []).forEach((staticPath) => {
      app.use(express.static(runPath(staticPath)));
    })
  } else {
    app.use(express.static(runPath('static')));
  }



  return app;
}