const utils = require('./utils');
const webpack = require('webpack');
const config = require('../config');
const merge = require('webpack-merge');
const baseWebpackConfig = require('../webpack.config');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin');

// add hot-reload related code to entry chunks
Object.keys(baseWebpackConfig.entry).forEach(name => {
    baseWebpackConfig.entry[name] = ['./build/dev-client'].concat(baseWebpackConfig.entry[name]);
});

module.exports = merge(baseWebpackConfig, {
    mode: 'development',
    module: {
        rules: utils.styleLoaders({sourceMap: config.dev.cssSourceMap})
    },
    // cheap-module-eval-source-map is faster for development
    devtool: '#cheap-module-eval-source-map',
    plugins: [
        new webpack.DefinePlugin({
            'process.env': config.dev.env
        }),
        // https://github.com/glenjamin/webpack-hot-middleware#installation--usage
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoEmitOnErrorsPlugin(),
        // https://github.com/ampedandwired/html-webpack-plugin
        new HtmlWebpackPlugin({
            filename: 'index.html',
            template: 'index.html',
            inject: true
        }),
        new FriendlyErrorsPlugin()
    ]
});
