const path = require('path');
const webpack = require('webpack');
const VueLoaderPlugin = require('vue-loader/lib/plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
const Fiber = require('fibers');


module.exports = (env, options) => {

  let config = {
    mode: options.mode,
    entry: './public/src/app.js',

    output: {
      path: path.resolve(__dirname, './public/dist'),
      publicPath: '/',
      filename: 'build.js'
    },

    module: {
      rules: [
        {
          test: /\.css$/,
          use: [
            'vue-style-loader',
            'css-loader'
          ],
        },
        {
          test: /\.scss$/,
          use: [
            'vue-style-loader',
            'css-loader',
            {
              loader: 'sass-loader',
              options: {
                implementation: require("sass")
              }
            }
          ],
        },
        {
          test: /\.vue$/,
          loader: 'vue-loader',
          options: {
            loaders: {
              'scss': [
                'vue-style-loader',
                'css-loader',
                'sass-loader'
              ]
            }
          }
        },
        {
          test: /\.js$/,
          loader: 'babel-loader',
          exclude: /node_modules/
        },
        {
          test: /\.(png|jpg|gif|svg)$/,
          loader: 'file-loader',
          options: {
            name: '[name].[ext]?[hash]'
          }
        }
      ]
    },

    plugins: [
      new HtmlWebpackPlugin({
        template: path.resolve(__dirname, './public/src/index.html')
      }),
      new VueLoaderPlugin()
    ],

    resolve: {
      alias: {
        'vue$': 'vue/dist/vue.esm.js'
      },
      extensions: ['*', '.js', '.vue', '.json']
    },

    devServer: {
      historyApiFallback: true,
      noInfo: true,
      overlay: true
    },

    performance: {
      hints: false
    },

    devtool: '#eval-source-map'
  };

  if (options.mode === 'production')
  {
    config.devtool = '#source-map'
    config.plugins = (config.plugins || []).concat([
      new webpack.DefinePlugin({
        'process.env': {
          NODE_ENV: '"production"'
        }
      }),
      new webpack.LoaderOptionsPlugin({
        minimize: true
      }),
      new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),

      // To see what's using the space in the bundle, uncomment this
      //new BundleAnalyzerPlugin()
    ]);
  }
  else
  {
    config.entry = [
      config.entry,
      'webpack-hot-middleware/client'
    ];

    config.plugins = (config.plugins || []).concat([
      new webpack.HotModuleReplacementPlugin(),
      new webpack.NoEmitOnErrorsPlugin()
    ]);
  }

  return config;
};