/**
 * React Static Boilerplate
 * https://github.com/koistya/react-static-boilerplate
 *
 * Copyright © 2015-2016 Konstantin Tarkus (@koistya)
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE.txt file in the root directory of this source tree.
 */

const path = require('path');
const webpack = require('webpack');
const extend = require('extend');
const pkg = require('../package.json');

const isDebug = !(process.argv.includes('--release') || process.argv.includes('-r'));
const isVerbose = process.argv.includes('--verbose') || process.argv.includes('-v');

/**
 * Webpack configuration (core/main.js => build/bundle.js)
 * http://webpack.github.io/docs/configuration.html
 */
const config = {

  // The base directory
  context: path.resolve(__dirname, '../'),

  // The entry point for the bundle
  entry: ['./core/app.js'],

  // Options affecting the output of the compilation
  output: {
    path: path.resolve(__dirname, '../build'),
    publicPath: '/',
    file: 'build/[name].js',
    sourcePrefix: '  ',
  },

  // Switch loaders to debug or release mode
  debug: isDebug,

  // Developer tool to enhance debugging, source maps
  // http://webpack.github.io/docs/configuration.html#devtool
  devtool: isDebug ? 'source-map' : false,

  // What information should be printed to the console
  stats: {
    colors: true,
    reasons: isDebug,
    hash: isVerbose,
    version: isVerbose,
    timings: true,
    chunks: isVerbose,
    chunkModules: isVerbose,
    cached: isVerbose,
    cachedAssets: isVerbose,
  },

  // The list of plugins for Webpack compiler
  plugins: [
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': isDebug ? '"development"' : '"production"',
      __DEV__: isDebug,
    }),
  ],

  // Options affecting the normal modules
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        include: [
          path.resolve(__dirname, '../components'),
          path.resolve(__dirname, '../core'),
          path.resolve(__dirname, '../routes'),
        ],
        loader: 'babel-loader',
        query: extend({}, pkg.babel, { babelrc: false }),
      },
      {
        test: /\.css/,
        loaders: [
          'style-loader',
          `css-loader?${JSON.stringify({
            sourceMap: isDebug,
            // CSS Modules https://github.com/css-modules/css-modules
            modules: true,
            localIdentName: isDebug ? '[name]_[local]_[hash:base64:3]' : '[hash:base64:4]',
            // CSS Nano http://cssnano.co/options/
            minimize: !isDebug,
          })}`,
          'postcss-loader',
        ],
      },
      {
        test: /\.json$/,
        loader: 'json-loader',
      },
      {
        test: /\.md$/,
        loader: path.resolve(__dirname, './webpack.markdown-loader.js'),
      },
      {
        test: /\.(png|jpg|jpeg|gif|svg|woff|woff2)$/,
        loader: 'url-loader?limit=10000',
      },
      {
        test: /\.(eot|ttf|wav|mp3)$/,
        loader: 'file-loader',
      },
    ],
  },

  // The list of plugins for PostCSS
  // https://github.com/postcss/postcss
  postcss(bundler) {
    return [
      // Transfer @import rule by inlining content, e.g. @import 'normalize.css'
      // https://github.com/postcss/postcss-import
      require('postcss-import')({ addDependencyTo: bundler }),
      // W3C custom properties for variables, e.g. :root { --color: red; } div { background: var(--color); }
      // https://github.com/postcss/postcss-custom-properties
      require('postcss-custom-properties')(),
      // W3C calc() function, e.g. div { height: calc(100px - 2em); }
      // https://github.com/postcss/postcss-calc
      require('postcss-calc')(),
      // W3C color() function, e.g. div { background: color(red alpha(90%)); }
      // https://github.com/postcss/postcss-color-function
      require('postcss-color-function')(),
      // Convert CSS shorthand filters to SVG equivalent, e.g. .blur { filter: blur(4px); }
      // https://github.com/iamvdo/pleeease-filters
      require('pleeease-filters')(),
      // Generate pixel fallback for "rem" units, e.g. div { margin: 2.5rem 2px 3em 100%; }
      // https://github.com/robwierzbowski/node-pixrem
      require('pixrem')(),
      // Pseudo elements such as a:before { }
      // https://github.com/axa-ch/postcss-pseudoelements
      require('postcss-pseudoelements')(),
      // Transforms :not() W3C CSS Level 4 pseudo class to :not() CSS Level 3 selectors
      // https://github.com/postcss/postcss-selector-not
      require('postcss-selector-not')(),
      // Add vendor prefixes to CSS rules using values from caniuse.com
      // https://github.com/postcss/autoprefixer
      require('autoprefixer')(),
    ];
  },

};

// Optimize the bundle in release (production) mode
if (!isDebug) {
  config.plugins.push(new webpack.optimize.DedupePlugin());
  config.plugins.push(new webpack.optimize.UglifyJsPlugin({ compress: { warnings: isVerbose } }));
  config.plugins.push(new webpack.optimize.AggressiveMergingPlugin());
}

module.exports = config;