/**
 * Build config for the v0.5.0 FSE migration (@wordpress/scripts + webpack).
 *
 * Phase 1 (CSS): webpack now produces the site-wide stylesheet `v4-style.min.css`
 * (the old gulp `build` task). The legacy gulp pipeline still handles the JS bundles
 * for now — those migrate later, as their jQuery-era behaviors get modernized during
 * the template phases (see _claude/notes/upgrade-plan.md).
 *
 * Output layout (output.path = theme root so nothing escapes it):
 *   - JS            → build/[name].js   (src/index.js seed; block view scripts later)
 *   - v4-style      → v4-style.min.css  (theme root — keeps the `style-min` enqueue + font url()s valid)
 *   - other CSS     → build/[name].css
 */
const path = require('path');
const webpack = require('webpack');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const BrowserSyncPlugin = require('browser-sync-webpack-plugin');

module.exports = {
  entry: {
    index: './src/index.js',
    // Reproduces gulp `build` → v4-style.min.css (concat of the 5 CSS sources, in order).
    'v4-style': './src/legacy-style.js',
    // Reproduces gulp `jsf` → homepage JS (jquery + svg-morpheus + front-page.js).
    front: './src/front.js',
    // Reproduces gulp `js` → site-wide JS (jquery/bootstrap/fullcalendar/plugins).
    main: './src/main.js',
  },
  output: {
    path: path.resolve(__dirname), // theme root
    // The two bundles overwrite their committed, enqueued paths in place (like
    // v4-style.min.css does) so nothing needs re-pointing and they ship via git.
    // Everything else (the seed, future block scripts) goes under the gitignored build/.
    filename: (pathData) => {
      const n = pathData.chunk.name;
      if (n === 'front') return 'js/v4-front.min.js';
      if (n === 'main') return 'js/v4-script.min.js';
      return 'build/[name].js';
    },
    clean: false, // NEVER clean — output.path is the theme root
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: { loader: 'babel-loader' },
      },
      {
        // svg-morpheus ships a bare global `var SVGMorpheus` (no export) — surface it as a
        // module export so src/front.js can re-expose it on window for front-page.js.
        test: require.resolve('svg-morpheus/compile/minified/svg-morpheus.js'),
        loader: 'exports-loader',
        options: { type: 'commonjs', exports: 'single SVGMorpheus' },
      },
      {
        // fullcalendar/main.js is likewise a bare global `var FullCalendar` build.
        test: require.resolve('fullcalendar/main.js'),
        loader: 'exports-loader',
        options: { type: 'commonjs', exports: 'single FullCalendar' },
      },
      {
        test: /\.css$/,
        use: [
          MiniCssExtractPlugin.loader,
          // url:false / import:false → leave url() + @import untouched (gulp-concat parity,
          // so the relative `fonts/…` paths keep resolving from the theme root).
          { loader: 'css-loader', options: { url: false, import: false } },
        ],
      },
      {
        // styles.scss @imports Bootstrap + bootstrap-icons from node_modules — webpack
        // now compiles it (replaces gulp's `mixin` task). quietDeps silences Bootstrap's
        // internal sass deprecation noise; url:false keeps the bootstrap-icons font path.
        test: /\.scss$/,
        use: [
          MiniCssExtractPlugin.loader,
          { loader: 'css-loader', options: { url: false, import: false } },
          {
            loader: 'sass-loader',
            options: {
              implementation: require('sass'),
              sassOptions: { quietDeps: true },
            },
          },
        ],
      },
    ],
  },
  optimization: {
    // '...' keeps webpack's default JS minifier (terser); add CSS minification.
    minimizer: [
      '...',
      // discardComments.removeAll matches the old gulp clean-css (specialComments:0).
      new CssMinimizerPlugin({
        minimizerOptions: { preset: ['default', { discardComments: { removeAll: true } }] },
      }),
    ],
  },
  plugins: [
    // jQuery globals for the bundled legacy scripts (front-page.js IIFEs, and the
    // scripts.js/validate.js plugin pile in the main bundle).
    new webpack.ProvidePlugin({ $: 'jquery', jQuery: 'jquery' }),
    new MiniCssExtractPlugin({
      filename: ({ chunk }) =>
        chunk.name === 'v4-style' ? 'v4-style.min.css' : 'build/[name].css',
    }),
    new BrowserSyncPlugin({
      host: 'daw.stu',
      port: 81,
      proxy: 'https://daw.stu',
      https: {
        key: '/opt/homebrew/etc/httpd/ssl/daw.stu-key.pem',
        cert: '/opt/homebrew/etc/httpd/ssl/daw.stu-cert.pem',
      },
      files: [
        './**/*.php',
        './src/**/*.js',
        './src/**/*.css',
        './templates/**/*.html',
        './parts/**/*.html',
        './patterns/**/*.php',
        './theme.json',
        './.bs-reload', // touched by save_post (functions.php) → reload after Gutenberg "Update"
      ],
      ignore: ['node_modules', 'build', 'js/v4-*', '*.min.*'],
      open: 'external',
      reloadDelay: 50,
      injectChanges: true,
      notify: false,
      // Serve dev responses uncached so a reload always reflects the latest edit
      // (no stale browser cache while iterating). Pairs with the `files` watch above,
      // which already auto-reloads on .php / template / src changes.
      middleware: function (req, res, next) {
        res.setHeader('Cache-Control', 'no-store, no-cache, must-revalidate, max-age=0');
        res.setHeader('Pragma', 'no-cache');
        res.setHeader('Expires', '0');
        next();
      },
    }),
  ],
};