const path = require('path');
const { version } = require('./package.json');
const webpack = require('webpack');


class PrependVersionPlugin {
  apply(compiler) {
    compiler.hooks.emit.tapAsync('PrependVersionPlugin', (compilation, callback) => {
      Object.keys(compilation.assets).forEach((filename) => {
        if (filename.endsWith('.js')) {
          const asset = compilation.assets[filename];

          const headerText = `/*!\n  * LiteRyzJS/Treeview v${version}\n  * Copyright 2023-2024 Ray Lam (https://www.hiimray.co.uk)\n  *\n  */\n`;

          const newContent = headerText + asset.source();

          compilation.assets[filename] = {
            source: () => newContent,
            size: () => newContent.length,
          };
        }
      });

      callback();
    });
  }
}


module.exports = {
  entry: {
    treeview: './src/index.js'
  },
  output: {
    filename: `[name].dist.js`,
    path: path.resolve(__dirname, 'dist'),
    library: 'LiteRyzJS',
    libraryTarget: 'umd',
    globalObject: 'this'
  },
  mode: 'production',  // development|production
  plugins: [
    new webpack.DefinePlugin({
        'process.env.VERSION': JSON.stringify(version)
    }),
    new PrependVersionPlugin()
  ],
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: [
          'style-loader',
          'css-loader',
          'sass-loader'
        ]
      }
    ]
  }
};