/* eslint-disable no-process-env, no-console */

const path = require('path');
const config = require('./config');
const utils = require('./utils');
const webpack = require('webpack');
const merge = require('webpack-merge');
const baseWebpackConfig = require('./webpack.base.conf');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const env = process.env.NODE_ENV === 'test' ?
  require('./config/test.env') :
  config.build.env;

const webpackConfig = merge(baseWebpackConfig, {
  module: {
    rules: utils.styleLoaders({ sourceMap: config.build.productionSourceMap, extract: true }),
  },
  devtool: config.build.productionSourceMap ? '#source-map' : false,
  output: {
    path: config.build.assetsRoot,
    filename: utils.assetsPath('js/[name].[chunkhash].js'),
    chunkFilename: utils.assetsPath('js/[id].[chunkhash].js'),
  },
  plugins: [
    // http://vuejs.github.io/vue-loader/workflow/production.html
    new webpack.DefinePlugin({
      'process.env': env,
    }),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false,
      },
      sourceMap: true,
    }),
    // extract css into its own file
    new ExtractTextPlugin({
      filename: utils.assetsPath('css/[name].[contenthash].css'),
    }),
    // generate dist index.html with correct asset hash for caching.
    // you can customize output by editing /index.html
    // see https://github.com/ampedandwired/html-webpack-plugin
    new HtmlWebpackPlugin({
      filename: process.env.NODE_ENV === 'test' ?
        'index.html' :
        config.build.index,
      template: './website/client/index.html',
      inject: true,
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true,
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      },
      // necessary to consistently work with multiple chunks via CommonsChunkPlugin
      chunksSortMode: 'dependency',
    }),
    // split vendor js into its own file
    new webpack.optimize.CommonsChunkPlugin({
      name: 'vendor',
      minChunks (scriptModule) {
        // any required modules inside node_modules are extracted to vendor
        return (
          scriptModule.resource &&
          /\.js$/.test(scriptModule.resource) &&
          scriptModule.resource.indexOf(
            path.join(__dirname, '../node_modules')
          ) === 0
        );
      },
    }),
    // extract webpack runtime and module manifest to its own file in order to
    // prevent vendor hash from being updated whenever app bundle is updated
    new webpack.optimize.CommonsChunkPlugin({
      name: 'manifest',
      chunks: ['vendor'],
    }),
  ],
});

if (config.build.productionGzip) {
  const CompressionWebpackPlugin = require('compression-webpack-plugin'); // eslint-disable-line global-require

  webpackConfig.plugins.push(
    new CompressionWebpackPlugin({
      asset: '[path].gz[query]',
      algorithm: 'gzip',
      test: new RegExp(`\\.(${config.build.productionGzipExtensions.join('|')})$`),
      threshold: 10240,
      minRatio: 0.8,
    })
  );
}

if (config.build.bundleAnalyzerReport) {
  const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin; // eslint-disable-line global-require
  webpackConfig.plugins.push(new BundleAnalyzerPlugin());
}

module.exports = webpackConfig;