const Webpack = require('webpack')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const CleanPlugin = require('clean-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')

const path = require('path')

const isProduction = process.env.NODE_ENV === 'production'

const join = (...paths) => path.join(__dirname, ...paths)

module.exports = {
  resolve: {
    extensions: [
      '.js',
      '.css'
    ],
    modules: [
      'source',
      'node_modules'
    ]
  },
  watch: !isProduction,
  entry: {
    'main.js': join('source', 'js', 'index.js'),
    'menu.js': join('source', 'js', 'menu.js'),
    'theme.js': join('source', 'js', 'theme.js'),
    'prism.js': join('source', 'js', 'prism.js'),
    'style.css': join('source', 'css', 'style.css'),
  },
  output: {
    filename: '[name]',
    path: join('static/assets'),
    publicPath: ''
  },
  performance: {
    hints: false
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env']
          }
        }
      },
      {
        test: /\.(png|jpg|woff|woff2|ttf|eot|svg)$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192
            }
          }
        ]
      },
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            {
              loader: 'css-loader',
              options: {
                minimize: true,
                modules: true,
                importLoaders: 1,
                localIdentName: '[local]'
              }
            },
            {
              loader: 'postcss-loader',
              options: {
                config: {
                  path: 'postcss.config.js'
                }
              }
            }
          ]
        })
      }
    ]
  },
  optimization: {
    splitChunks: {
      name: 'vendor',
      minChunks: 2
    },
    minimizer: [
      new UglifyJsPlugin({
        sourceMap: false,
      })
    ]
  },
  plugins: [
    new CleanPlugin(join('static/assets')),
    new HtmlWebpackPlugin({
      template: join('source', 'html', 'inject.script.ejs'),
      filename: join('layouts', 'partials', 'inject.script.html'),
      inject: false
    }),
    new HtmlWebpackPlugin({
      template: join('source', 'html', 'inject.stylesheet.ejs'),
      filename: join('layouts', 'partials', 'inject.stylesheet.html'),
      inject: false,
    }),
    new ExtractTextPlugin('[name]'),
    new Webpack.LoaderOptionsPlugin({
      minimize: true,
      debug: true
    }),
    new Webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('development')
    })
  ]
}