const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const webpack = require('webpack');
const path = require('path');
const env = process.env;
const exec = require('child_process').execSync;

module.exports = {
  mode: `${env.NODE_ENV ? env.NODE_ENV : 'production'}`,
  entry: [
    path.join(__dirname, './src/index.js')
  ],
  output: {
    path: path.join(__dirname, 'dist'),
    filename: '[name].[hash].js',
    publicPath: '/'
  },
  resolve: {
    extensions: [".ts", ".tsx", ".js", ".jsx"]
  },
  devServer: {
    compress: true,
    port: 8080,
    historyApiFallback: true,
    hot: env.NODE_ENV === 'development',
    proxy: {
      '/api': {
        target: 'http://127.0.0.1:8081',
      }
    }
  },
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        exclude: /node_modules/,
        loaders: ['ts-loader']
      },
      {
        test: /\.module\.css$/,
        use: [
          {
            loader: '@teamsupercell/typings-for-css-modules-loader',
          },
          {
            loader: MiniCssExtractPlugin.loader,
          },
          { loader: "css-loader", options: { modules: true } }
        ]
      },
      {
        test: /^((?!\.module).)*css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
          },
          { loader: "css-loader" },
        ]
      }
    ]
  },
  plugins: [
    new ForkTsCheckerWebpackPlugin(),
    new HtmlWebpackPlugin({
      title: 'Guesstimate',
      scriptLoading: 'defer',

      template: path.join(__dirname, 'src/index.html')    
    }),
    new webpack.WatchIgnorePlugin([
      /css\.d\.ts$/
    ]),
    new MiniCssExtractPlugin({
      filename: '[name].[hash].css'
    }),
    new webpack.DefinePlugin({
      __BUILD__: JSON.stringify({
        version: getCurrentVersion(),
        gitRef: getCurrentGitRef(),
        buildDate: new Date(),
      })
   })
  ]
};

function getCurrentVersion() {
  let version 
  try {
    version = exec("git describe --abbrev=0 2>/dev/null")
  } catch(err) {}
  return version ? version : "0.0.0";
}

function getCurrentGitRef() {
  return exec("git log -n 1 --pretty='format:%h'").toString()
}