/**
 * Forge webpack build rules.
 *
 * @author Digital Bazaar, Inc.
 *
 * Copyright 2011-2016 Digital Bazaar, Inc.
 */
const path = require('path');

// build multiple outputs
module.exports = [];

// custom setup for each output
// all built files will export the "forge" library but with different content
const outputs = [
  // core forge library crypto and utils
  {
    entry: ['./lib/index.js'],
    filenameBase: 'forge'
  },
  // core forge library + extra utils and networking support
  {
    entry: ['./lib/index.all.js'],
    filenameBase: 'forge.all'
  },
  // prime webworker
  {
    entry: ['./lib/prime.worker.js', './lib/forge.js'],
    filenameBase: 'prime.worker',
    library: null,
    libraryTarget: null
  }
  // Custom builds can be created by specifying the high level files you need
  // webpack will pull in dependencies as needed.
  //
  // Note: Some modules, such as pbkdf2, may require explicitly listing other
  // modules they require, such as sha1 or sha256. This is to allow smaller
  // builds when you don't require a default dependency.
  //
  // Note: If using UMD or similar, add forge.js *last* to properly export
  // the top level forge namespace.
  //
  // Example: sha1 + ...
  //{
  //  entry: ['./lib/sha1.js', ..., './lib/forge.js'],
  //  filenameBase: 'forge.custom',
  //  libraryTarget: 'umd'
  //}
  // Example: PBKDF2 + sha1, explicitly include sha1 default
  //{
  //  entry: ['./lib/pbkdf2.js', './lib/sha1.js', './lib/forge.js'],
  //  filenameBase: 'forge.pbkdf2-sha1',
  //  libraryTarget: 'umd'
  //}
  // Example: PBKDF2 + sha256, without the sha1 default
  //{
  //  entry: ['./lib/pbkdf2.js', './lib/sha256.js', './lib/forge.js'],
  //  filenameBase: 'forge.pbkdf2-sha256',
  //  libraryTarget: 'umd'
  //}
];

outputs.forEach(info => {
  // common to bundle and minified
  const common = {
    // each output uses the "forge" name but with different contents
    entry: {
      forge: info.entry
    },
    // disable various node shims as forge handles this manually
    node: {
      Buffer: false,
      process: false,
      crypto: false,
      setImmediate: false
    }
  };

  // plain unoptimized unminified bundle
  const bundle = Object.assign({}, common, {
    mode: 'development',
    output: {
      path: path.join(__dirname, 'dist'),
      filename: info.filenameBase + '.js',
      library: info.library || '[name]',
      libraryTarget: info.libraryTarget || 'umd'
    }
  });
  if(info.library === null) {
    delete bundle.output.library;
  }
  if(info.libraryTarget === null) {
    delete bundle.output.libraryTarget;
  }

  // optimized and minified bundle
  const minify = Object.assign({}, common, {
    mode: 'production',
    output: {
      path: path.join(__dirname, 'dist'),
      filename: info.filenameBase + '.min.js',
      library: info.library || '[name]',
      libraryTarget: info.libraryTarget || 'umd'
    },
    devtool: 'cheap-module-source-map',
    plugins: [
      /*
      new webpack.optimize.UglifyJsPlugin({
        sourceMap: true,
        compress: {
          warnings: true
        },
        output: {
          comments: false
        }
        //beautify: true
      })
      */
    ]
  });
  if(info.library === null) {
    delete minify.output.library;
  }
  if(info.libraryTarget === null) {
    delete minify.output.libraryTarget;
  }

  module.exports.push(bundle);
  module.exports.push(minify);
});