const { resolve } = require('path')
const webpack = require('webpack')
// const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
// const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin')
// const CompressionPlugin = require('compression-webpack-plugin')
const ManifestPlugin = require('webpack-manifest-plugin')
const CleanWebpackPlugin = require('clean-webpack-plugin')
const nodeExternals = require('webpack-node-externals')
const CreateFileWebpack = require('create-file-webpack')

const browserConfig = {
  mode: 'production',
  entry: {
    bundle: [
      './src/app-client.js'
    ]
  },
  output: {
    path: resolve(__dirname, 'public/static'),
    filename: '[name].js',
    // filename: '[name].[contenthash].js',
    publicPath: '/static/'
  },
  devtool: 'eval-source-map',
  module: {
    rules: [
      {
        test: /\.js$/,
        use: [
          'babel-loader'
        ],
        exclude: '/node_modules/'
      },
      {
        test: /\.scss$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              modules: true,
              importLoaders: 2,
              localIdentName: '[name]__[local]___[hash:base64:5]'
            }
          },
          {
            loader: 'postcss-loader'
          },
          {
            loader: 'sass-loader'
          }
        ]
      },
      {
        test: /\.(png|jpg)$/,
        exclude: /node_modules/,
        loader: 'url-loader',
        options: {
          limit: 8192
        }
      }
    ]
  },
  plugins: [
    new webpack.DefinePlugin({ __isBrowser__: 'true' }),
    new CleanWebpackPlugin(['public/static', 'build'], {}),
    new MiniCssExtractPlugin(),
    // new CompressionPlugin({}),
    new ManifestPlugin()
  ],
  node: { fs: 'empty' }
}

const serverConfig = {
  entry: './src/server.js',
  target: 'node',
  externals: [nodeExternals()],
  output: {
    path: resolve(__dirname, 'build'),
    filename: 'server.js',
    publicPath: '/'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        use: [
          'babel-loader'
        ],
        exclude: '/node_modules/'
      },
      {
        test: /\.scss$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              modules: true,
              exportOnlyLocals: true,
              importLoaders: 2,
              localIdentName: '[name]__[local]___[hash:base64:5]'
            }
          },
          {
            loader: 'postcss-loader'
          },
          {
            loader: 'sass-loader'
          }
        ]
      },
      {
        test: /\.(png|jpg)$/,
        exclude: /node_modules/,
        loader: 'url-loader',
        options: {
          limit: 10000
        }
      }
    ]
  },
  plugins: [
    new webpack.DefinePlugin({
      __isBrowser__: 'false'
    }),
    new MiniCssExtractPlugin(),
    new CreateFileWebpack({
      path: './src/utils/',
      fileName: 'data.json',
      content: JSON.stringify({
        'posts': [],
        'other': {}
      })
    })
  ]
}

module.exports = [browserConfig, serverConfig]