// Copyright 2023 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.

'use strict';

const path = require('path');
const NodePolyfillPlugin = require('node-polyfill-webpack-plugin');
const webpack = require('webpack');

/**@type {import('webpack').Configuration}*/
const config = {
  // vscode extensions run in webworker context for VS
  // Code web 📖 -> https://webpack.js.org/configuration/target/#target
  target: 'webworker',

  // the entry point of this extension, 📖 ->
  // https://webpack.js.org/configuration/entry-context/
  entry: './src/extension.ts',

  output: {
    // the bundle is stored in the 'dist' folder (check package.json), 📖 ->
    // https://webpack.js.org/configuration/output/
    path: path.resolve(__dirname, 'dist'),
    filename: 'extension.js',
    libraryTarget: 'commonjs2',
    devtoolModuleFilenameTemplate: '../[resource-path]',
  },
  devtool: 'source-map',
  plugins: [new NodePolyfillPlugin()],
  externals: {
    // the vscode-module is created on-the-fly and must
    // be excluded. Add other modules that cannot be
    // webpack'ed, 📖 -> https://webpack.js.org/configuration/externals/
    vscode: 'commonjs vscode',
  },
  resolve: {
    // support reading TypeScript and JavaScript files, 📖 ->
    // https://github.com/TypeStrong/ts-loader
    // look for `browser` entry point in imported node modules
    mainFields: ['browser', 'module', 'main'],
    extensions: ['.ts', '.js'],
    alias: {
      // provides alternate implementation for node module and source files
    },
    fallback: {
      // Webpack 5 no longer polyfills Node.js core modules automatically.
      // see https://webpack.js.org/configuration/resolve/#resolvefallback
      // for the list of Node.js core module polyfills.
    },
  },
  module: {
    rules: [
      {
        test: /\.ts$/,
        exclude: /node_modules/,
        use: [{ loader: 'ts-loader' }],
      },
    ],
  },
};
module.exports = config;