require('babel-register')();
const gulp = require('gulp');
const gutil = require('gulp-util');
const webpack = require('webpack');
const opn = require('opn');
const WebpackDevServer = require('webpack-dev-server');
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const siteConfig = require('./site_config/site.js').default;
const webpackConfig = require('./webpack.config.js');

const port = siteConfig.port || 8080;

// The development server (the recommended option for development)
gulp.task('default', ['webpack-dev-server']);

// Production build
gulp.task('build', ['webpack:build']);

gulp.task('webpack-dev-server', () => {
  // modify some webpack config options
  const myConfig = Object.create(webpackConfig);
  myConfig.plugins.push(new webpack.SourceMapDevToolPlugin({}));
  // Start a webpack-dev-server
  new WebpackDevServer(webpack(myConfig), {
    publicPath: `http://127.0.0.1:${port}/build/`,
    stats: {
      colors: true
    }
  }).listen(port, '127.0.0.1', (err) => {
    if (err) throw new gutil.PluginError('webpack-dev-server', err);
    opn(`http://127.0.0.1:${port}/`);
    gutil.log('[webpack-dev-server]', `http://127.0.0.1:${port}/webpack-dev-server/index.html`);
  });
});

gulp.task('webpack:build', (callback) => {
  // modify some webpack config options
  const myConfig = Object.create(webpackConfig);
  myConfig.output.publicPath = `${siteConfig.rootPath}/build/`;
  myConfig.plugins = myConfig.plugins.concat(
    new webpack.DefinePlugin({
      'process.env': {
        // This has effect on the react lib size
        NODE_ENV: JSON.stringify('production')
      }
    }),
    new webpack.optimize.UglifyJsPlugin(),
    // 压缩css代码
    new OptimizeCssAssetsPlugin({
      cssProcessor: require('cssnano'),
      cssProcessorPluginOptions: {
        preset: ['default', { discardComments: { removeAll: true } }],
      },
    })
  );

  // run webpack
  webpack(myConfig, (err, stats) => {
    if (err) throw new gutil.PluginError('webpack:build', err);
    gutil.log('[webpack:build]', stats.toString({
      colors: true
    }));
    callback();
  });
});