const webpack = require("webpack");
const { WebpackManifestPlugin } = require("webpack-manifest-plugin");
const WebpackTerserPlugin = require("terser-webpack-plugin");
const WebpackCopyPlugin = require("copy-webpack-plugin");
const path = require("path");
const wpScriptConfig = require("@wordpress/scripts/config/webpack.config");
const DependencyExtractionWebpackPlugin = require("@wordpress/dependency-extraction-webpack-plugin");

const globalPrefix = "MailPoetLib";
const PRODUCTION_ENV = process.env.NODE_ENV === "production";
const manifestSeed = {};

// Base config
const baseConfig = {
  mode: PRODUCTION_ENV ? "production" : "development",
  devtool: PRODUCTION_ENV ? undefined : "eval-source-map",
  cache: true,
  bail: PRODUCTION_ENV,
  context: __dirname,
  watchOptions: {
    aggregateTimeout: 300,
    poll: true,
  },
  optimization: {
    minimizer: [
      new WebpackTerserPlugin({
        terserOptions: {
          // preserve identifier names for easier debugging & support
          mangle: false,
        },
        parallel: false,
      }),
    ],
  },
  output: {
    publicPath: "", // This is needed to have correct names in WebpackManifestPlugin
    path: path.join(__dirname, "assets/dist/js"),
    filename: PRODUCTION_ENV ? "[name].[fullhash:8].js" : "[name].js",
    chunkFilename: PRODUCTION_ENV
      ? "[name].[fullhash:8].chunk.js"
      : "[name].chunk.js",
  },
  resolve: {
    modules: ["node_modules", "assets/js/src"],
    fallback: {
      fs: false,
      // We need path polyfill so that eslint is able to lint webpack.config.js
      // and it is imported in css module, but we don't use the functionality which requires it
      path: require.resolve("path-browserify"),
    },
    extensions: [".js", ".jsx", ".ts", ".tsx"],
    alias: {
      handlebars: "handlebars/dist/handlebars.js",
      "backbone.marionette": "backbone.marionette/lib/backbone.marionette",
      "backbone.supermodel$":
        "backbone.supermodel/build/backbone.supermodel.js",
      "sticky-kit": "vendor/jquery.sticky-kit.js",
      interact$: "interact.js/interact.js",
      spectrum$: "spectrum-colorpicker/spectrum.js",
      "wp-js-hooks": path.resolve(__dirname, "assets/js/src/hooks.js"),
      blob$: "blob-tmp/Blob.js",
      chai: "chai/index.js",
      papaparse: "papaparse/papaparse.min.js",
      html2canvas: "html2canvas/dist/html2canvas.js",
      asyncqueue: "vendor/jquery.asyncqueue.js",
    },
  },
  plugins: [],
  module: {
    noParse: /node_modules\/lodash\/lodash\.js/,
    rules: [
      {
        test: /\.(j|t)sx?$/,
        exclude: /(node_modules|src\/vendor)/,
        loader: "babel-loader",
      },
      {
        include: require.resolve("underscore"),
        loader: "expose-loader",
        options: {
          exposes: "_",
        },
      },
      {
        include: require.resolve("react-tooltip"),
        loader: "expose-loader",
        options: {
          exposes: `${globalPrefix}.ReactTooltip`,
        },
      },
      {
        include: require.resolve("react"),
        loader: "expose-loader",
        options: {
          exposes: `${globalPrefix}.React`,
        },
      },
      {
        include: require.resolve("react-dom"),
        loader: "expose-loader",
        options: {
          exposes: `${globalPrefix}.ReactDOM`,
        },
      },
      {
        include: require.resolve("react-router-dom"),
        loader: "expose-loader",
        options: {
          exposes: `${globalPrefix}.ReactRouter`,
        },
      },
      {
        include: require.resolve("react-string-replace"),
        loader: "expose-loader",
        options: {
          exposes: `${globalPrefix}.ReactStringReplace`,
        },
      },
      {
        include: path.resolve(__dirname, "assets/js/src/hooks.js"),
        loader: "expose-loader",
        options: {
          exposes: {
            globalName: `${globalPrefix}.Hooks`,
            override: true,
          },
        },
      },
      {
        test: /listing.jsx/i,
        use: [
          {
            loader: "expose-loader",
            options: {
              exposes: `${globalPrefix}.Listing`,
            },
          },
          "babel-loader",
        ],
      },
      {
        include: path.resolve(__dirname, "assets/js/src/help-tooltip.jsx"),
        use: [
          {
            loader: "expose-loader",
            options: {
              exposes: `${globalPrefix}.HelpTooltip`,
            },
          },
          "babel-loader",
        ],
      },
      {
        include: path.resolve(__dirname, "assets/js/src/common/index.ts"),
        use: [
          {
            loader: "expose-loader",
            options: {
              exposes: `${globalPrefix}.Common`,
            },
          },
          "babel-loader",
        ],
      },
      {
        include: /Blob.js$/,
        loader: "exports-loader",
        options: {
          exports: "default window.Blob",
        },
      },
      {
        test: /backbone.supermodel/,
        loader: "exports-loader",
        options: {
          exports: "default Backbone.SuperModel",
        },
      },
      {
        include: require.resolve("velocity-animate"),
        loader: "imports-loader",
        options: {
          imports: {
            name: "jQuery",
            moduleName: "jquery",
          },
        },
      },
      {
        include: require.resolve("classnames"),
        use: [
          {
            loader: "expose-loader",
            options: {
              exposes: `${globalPrefix}.ClassNames`,
            },
          },
          "babel-loader",
        ],
      },
      {
        test: /node_modules\/tinymce/,
        loader: "string-replace-loader",
        options: {
          // prefix TinyMCE to avoid conflicts with other plugins
          multiple: [
            {
              search: "window\\.tinymce",
              replace: "window.mailpoetTinymce",
              flags: "g",
            },
            {
              search: "tinymce\\.util",
              replace: "window.mailpoetTinymce.util",
              flags: "g",
            },
            {
              search: "resolve\\('tinymce",
              replace: "resolve('mailpoetTinymce",
              flags: "g",
            },
          ],
        },
      },
    ],
  },
};

// Admin config
const adminConfig = {
  name: "admin",
  entry: {
    vendor: "webpack_vendor_index.jsx",
    mailpoet: "webpack_mailpoet_index.jsx",
    // Admin vendor contains libraries shared between free and premium plugin
    admin_vendor: [
      "react",
      "react-dom",
      require.resolve("react-router-dom"),
      "react-string-replace",
      "prop-types",
      "classnames",
      "lodash",
      "help-tooltip.jsx",
      "listing/listing.jsx",
      "common/index.ts",
    ],
    admin: "webpack_admin_index.jsx",
    newsletter_editor: "newsletter_editor/webpack_index.jsx",
    form_editor: "form_editor/form_editor.jsx",
    settings: "settings/index.tsx",
  },
  plugins: [
    ...baseConfig.plugins,

    new WebpackCopyPlugin({
      patterns: [
        {
          from: "node_modules/tinymce/skins/ui/oxide",
          to: "skins/ui/oxide",
        },
      ],
    }),
    new webpack.ProvidePlugin({
      process: "process/browser",
    }),
  ],
  optimization: {
    runtimeChunk: "single",
    splitChunks: {
      cacheGroups: {
        commons: {
          name: "commons",
          chunks: "initial",
          minChunks: 2,
        },
      },
    },
  },
  externals: {
    jquery: "jQuery",
  },
};

// Public config
const publicConfig = {
  name: "public",
  entry: {
    public: "webpack_public_index.jsx",
  },
  plugins: [
    ...baseConfig.plugins,

    // replace MailPoet definition with a smaller version for public
    new webpack.NormalModuleReplacementPlugin(
      /mailpoet\.js/,
      "./mailpoet_public.js"
    ),
  ],
  externals: {
    jquery: "jQuery",
  },
};

// Migrator config
const migratorConfig = {
  name: "mp2migrator",
  entry: {
    mp2migrator: ["mp2migrator.js"],
  },
  externals: {
    jquery: "jQuery",
    mailpoet: "MailPoet",
  },
};

// Newsletter Editor Tests Config
const testConfig = {
  name: "test",
  entry: {
    vendor: "webpack_vendor_index.jsx",
    testNewsletterEditor: [
      "webpack_mailpoet_index.jsx",
      "newsletter_editor/webpack_index.jsx",

      "components/config.spec.js",
      "components/content.spec.js",
      "components/heading.spec.js",
      "components/history.spec.js",
      "components/save.spec.js",
      "components/sidebar.spec.js",
      "components/styles.spec.js",
      "components/communication.spec.js",

      "blocks/automatedLatestContentLayout.spec.js",
      "blocks/button.spec.js",
      "blocks/container.spec.js",
      "blocks/divider.spec.js",
      "blocks/footer.spec.js",
      "blocks/header.spec.js",
      "blocks/image.spec.js",
      "blocks/posts.spec.js",
      "blocks/products.spec.js",
      "blocks/social.spec.js",
      "blocks/spacer.spec.js",
      "blocks/text.spec.js",
    ],
  },
  output: {
    path: path.join(
      __dirname,
      "tests/javascript_newsletter_editor/testBundles"
    ),
    filename: "[name].js",
  },
  plugins: [
    ...baseConfig.plugins,

    // replace MailPoet definition with a smaller version for public
    new webpack.NormalModuleReplacementPlugin(
      /mailpoet\.js/,
      "./mailpoet_tests.js"
    ),
  ],
  resolve: {
    modules: [
      "node_modules",
      "assets/js/src",
      "tests/javascript_newsletter_editor/newsletter_editor",
    ],
    extensions: [".js", ".jsx", ".ts", ".tsx"],
    alias: {
      handlebars: "handlebars/dist/handlebars.js",
      "sticky-kit": "vendor/jquery.sticky-kit.js",
      "backbone.marionette": "backbone.marionette/lib/backbone.marionette",
      "backbone.supermodel$":
        "backbone.supermodel/build/backbone.supermodel.js",
      blob$: "blob-tmp/Blob.js",
      "wp-js-hooks": path.resolve(__dirname, "assets/js/src/hooks.js"),
    },
    fallback: {
      fs: false,
    },
  },
  externals: {
    jquery: "jQuery",
    interact: "interact",
    spectrum: "spectrum",
  },
};

// Form preview config
const formPreviewConfig = {
  name: "form_preview",
  entry: {
    form_preview: "form_editor/form_preview.ts",
  },
  externals: {
    jquery: "jQuery",
  },
};

// Block config
const postEditorBlock = {
  name: "post_editor_block",
  entry: {
    post_editor_block: "post_editor_block/blocks.jsx",
  },
};

const requestToExternal = (request) => {
  // The following default externals are bundled for compatibility with older versions of WP
  // Note CSS for specific components is bundled via admin/assets/src/index.scss
  // WP 5.4 is the min version for <Card* />, <TabPanel />
  const bundled = [
    "@wordpress/compose",
    "@wordpress/components",
    "@wordpress/warning",
    "@wordpress/primitives",
  ];
  if (bundled.includes(request)) {
    return false;
  }

  const wcDepMap = {
    "@woocommerce/settings": ["wc", "wcSettings"],
    "@woocommerce/blocks-checkout": ["wc", "blocksCheckout"],
  };
  if (wcDepMap[request]) {
    return wcDepMap[request];
  }
};

const requestToHandle = (request) => {
  const wcHandleMap = {
    "@woocommerce/settings": "wc-settings",
    "@woocommerce/blocks-checkout": "wc-blocks-checkout",
  };
  if (wcHandleMap[request]) {
    return wcHandleMap[request];
  }
};

// Marketing Optin config
const marketingOptinBlock = {
  ...wpScriptConfig,
  name: "marketing_optin_block",
  entry: {
    "marketing-optin-block": path.resolve(
      process.cwd(),
      "assets/js/src/marketing_optin_block",
      "index.tsx"
    ),
    "marketing-optin-block-frontend": path.resolve(
      process.cwd(),
      "assets/js/src/marketing_optin_block",
      "frontend.tsx"
    ),
  },
  output: {
    filename: "[name].js",
    path: path.resolve(process.cwd(), "assets/dist/js/marketing_optin_block"),
  },
  module: {
    ...wpScriptConfig.module,
    rules: [
      ...wpScriptConfig.module.rules,
      {
        test: /\.(t|j)sx?$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader?cacheDirectory",
          options: {
            presets: ["@wordpress/babel-preset-default"],
            plugins: [
              require.resolve("@babel/plugin-proposal-class-properties"),
              require.resolve(
                "@babel/plugin-proposal-nullish-coalescing-operator"
              ),
            ].filter(Boolean),
          },
        },
      },
    ],
  },
  resolve: {
    extensions: [".js", ".jsx", ".ts", ".tsx"],
  },
  plugins: [
    ...wpScriptConfig.plugins.filter(
      (plugin) =>
        plugin.constructor.name !== "DependencyExtractionWebpackPlugin"
    ),
    new DependencyExtractionWebpackPlugin({
      injectPolyfill: true,
      requestToExternal,
      requestToHandle,
    }),
  ],
};

const configs = [
  publicConfig,
  adminConfig,
  migratorConfig,
  formPreviewConfig,
  testConfig,
  postEditorBlock,
];

module.exports = [
  ...configs.map((conf) => {
    const config = Object.assign({}, conf);
    if (config.name !== "test") {
      config.plugins = config.plugins || [];
      config.plugins.push(
        new WebpackManifestPlugin({
          // create single manifest file for all Webpack configs
          seed: manifestSeed,
        })
      );
    }
    return Object.assign({}, baseConfig, config);
  }),
  marketingOptinBlock,
];