const path = require('path');
const webpack = require('webpack');
const WebpackBar = require('webpackbar');
const webpackMerge = require('webpack-merge');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
const postcssConfig = require('./postcssConfig');
const CleanUpStatsPlugin = require('./utils/CleanUpStatsPlugin');

const distFileBaseName = 'antd';

const svgRegex = /\.svg(\?v=\d+\.\d+\.\d+)?$/;
const svgOptions = {
  limit: 10000,
  minetype: 'image/svg+xml',
};

const imageOptions = {
  limit: 10000,
};

function getWebpackConfig(modules) {
  const pkg = require(path.join(process.cwd(), 'package.json'));
  const babelConfig = require('./getBabelCommonConfig')(modules || false);

  const pluginImportOptions = [
    {
      style: true,
      libraryName: distFileBaseName,
      libraryDirectory: 'components',
    },
  ];
  babelConfig.plugins.push([require.resolve('babel-plugin-import'), pluginImportOptions]);

  if (modules === false) {
    babelConfig.plugins.push(require.resolve('./replaceLib'));
  }

  const config = {
    devtool: 'source-map',

    output: {
      path: path.join(process.cwd(), './dist/'),
      filename: '[name].js',
    },

    resolve: {
      modules: ['node_modules', path.join(__dirname, '../node_modules')],
      extensions: ['.js', '.jsx', '.vue', '.md', '.json'],
      alias: {
        vue$: 'vue/dist/vue.esm.js',
        '@': process.cwd(),
      },
    },

    node: [
      'child_process',
      'cluster',
      'dgram',
      'dns',
      'fs',
      'module',
      'net',
      'readline',
      'repl',
      'tls',
    ].reduce((acc, name) => Object.assign({}, acc, { [name]: 'empty' }), {}),

    module: {
      noParse: [/moment.js/],
      rules: [
        {
          test: /\.vue$/,
          exclude: /node_modules/,
          use: [
            {
              loader: 'vue-loader',
              options: {
                loaders: {
                  js: [
                    {
                      loader: 'babel-loader',
                      options: {
                        presets: ['env'],
                        plugins: ['transform-vue-jsx', 'transform-object-rest-spread'],
                      },
                    },
                  ],
                },
              },
            },
          ],
        },
        {
          test: /\.(js|jsx)$/,
          loader: 'babel-loader',
          exclude: /node_modules/,
          options: babelConfig,
        },
        {
          test: /\.css$/,
          use: [
            MiniCssExtractPlugin.loader,
            {
              loader: 'css-loader',
              options: {
                sourceMap: true,
              },
            },
            {
              loader: 'postcss-loader',
              options: Object.assign({}, postcssConfig, { sourceMap: true }),
            },
          ],
        },
        {
          test: /\.less$/,
          use: [
            MiniCssExtractPlugin.loader,
            {
              loader: 'css-loader',
              options: {
                sourceMap: true,
              },
            },
            {
              loader: 'postcss-loader',
              options: Object.assign({}, postcssConfig, { sourceMap: true }),
            },
            {
              loader: 'less-loader',
              options: {
                sourceMap: true,
                javascriptEnabled: true,
              },
            },
          ],
        },
        // Images
        {
          test: svgRegex,
          loader: 'url-loader',
          options: svgOptions,
        },
        {
          test: /\.(png|jpg|jpeg|gif)(\?v=\d+\.\d+\.\d+)?$/i,
          loader: 'url-loader',
          options: imageOptions,
        },
      ],
    },

    plugins: [
      new CaseSensitivePathsPlugin(),
      new webpack.BannerPlugin(`
${pkg.name} v${pkg.version}

Copyright 2017-present, ant-design-vue.
All rights reserved.
      `),
      new WebpackBar({
        name: '🚚  Ant Design Vue Tools',
        color: '#2f54eb',
      }),
      new CleanUpStatsPlugin(),
    ],
  };

  if (process.env.RUN_ENV === 'PRODUCTION') {
    const entry = ['./index'];
    config.externals = {
      vue: {
        root: 'Vue',
        commonjs2: 'vue',
        commonjs: 'vue',
        amd: 'vue',
      },
    };
    config.output.library = distFileBaseName;
    config.output.libraryTarget = 'umd';
    config.optimization = {
      minimizer: [
        new TerserPlugin({
          sourceMap: true,
        }),
      ],
    };

    // Development
    const uncompressedConfig = webpackMerge({}, config, {
      entry: {
        [distFileBaseName]: entry,
      },
      mode: 'development',
      plugins: [
        new MiniCssExtractPlugin({
          filename: '[name].css',
        }),
      ],
    });

    // Production
    const prodConfig = webpackMerge({}, config, {
      entry: {
        [`${distFileBaseName}.min`]: entry,
      },
      mode: 'production',
      plugins: [
        new webpack.optimize.ModuleConcatenationPlugin(),
        new webpack.LoaderOptionsPlugin({
          minimize: true,
        }),
        new MiniCssExtractPlugin({
          filename: '[name].css',
        }),
      ],
      optimization: {
        minimizer: [new OptimizeCSSAssetsPlugin({})],
      },
    });

    return [prodConfig, uncompressedConfig];
  }

  return config;
}

getWebpackConfig.webpack = webpack;
getWebpackConfig.svgRegex = svgRegex;
getWebpackConfig.svgOptions = svgOptions;
getWebpackConfig.imageOptions = imageOptions;

module.exports = getWebpackConfig;