const path = require('path');
const fs = require('fs');
const webpack = require('webpack');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const HtmlWebpackInjector = require('html-webpack-injector');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const { AngularWebpackPlugin } = require('@ngtools/webpack');
const pjson = require('./package.json');
const config = require('./config.js');

const ENV = process.env.ENV == null ? 'development' : process.env.ENV;
const NODE_ENV = process.env.NODE_ENV == null ? 'development' : process.env.NODE_ENV;

const envConfig = config.load(ENV);
config.log(envConfig);

const moduleRules = [
    {
        test: /\.ts$/,
        enforce: 'pre',
        loader: 'tslint-loader',
    },
    {
        test: /\.(html)$/,
        loader: 'html-loader',
    },
    {
        test: /.(ttf|otf|eot|svg|woff(2)?)(\?[a-z0-9]+)?$/,
        exclude: /loading(|-white).svg/,
        generator: {
            filename: 'fonts/[name].[ext]',
        },
        type: 'asset/resource',
    },
    {
        test: /\.(jpe?g|png|gif|svg)$/i,
        exclude: /.*(fontawesome-webfont)\.svg/,
        generator: {
            filename: 'images/[name].[ext]',
        },
        type: 'asset/resource',
    },
    {
        test: /\.scss$/,
        use: [
            {
                loader: MiniCssExtractPlugin.loader,
            },
            'css-loader',
            'sass-loader',
        ],
    },
    {
        test: /(?:\.ngfactory\.js|\.ngstyle\.js|\.ts)$/,
        loader: '@ngtools/webpack',
    },
];

const plugins = [
    new CleanWebpackPlugin(),
    // ref: https://github.com/angular/angular/issues/20357
    new webpack.ContextReplacementPlugin(/\@angular(\\|\/)core(\\|\/)fesm5/,
        path.resolve(__dirname, './src')),
    new HtmlWebpackPlugin({
        template: './src/index.html',
        filename: 'index.html',
        chunks: ['theme_head', 'app/polyfills', 'app/vendor', 'app/main'],
    }),
    new HtmlWebpackInjector(),
    new HtmlWebpackPlugin({
        template: './src/connectors/duo.html',
        filename: 'duo-connector.html',
        chunks: ['connectors/duo'],
    }),
    new HtmlWebpackPlugin({
        template: './src/connectors/u2f.html',
        filename: 'u2f-connector.html',
        chunks: ['connectors/u2f'],
    }),
    new HtmlWebpackPlugin({
        template: './src/connectors/webauthn.html',
        filename: 'webauthn-connector.html',
        chunks: ['connectors/webauthn'],
    }),
    new HtmlWebpackPlugin({
        template: './src/connectors/webauthn-mobile.html',
        filename: 'webauthn-mobile-connector.html',
        chunks: ['connectors/webauthn'],
    }),
    new HtmlWebpackPlugin({
        template: './src/connectors/webauthn-fallback.html',
        filename: 'webauthn-fallback-connector.html',
        chunks: ['connectors/webauthn-fallback'],
    }),
    new HtmlWebpackPlugin({
        template: './src/connectors/sso.html',
        filename: 'sso-connector.html',
        chunks: ['connectors/sso'],
    }),
    new HtmlWebpackPlugin({
        template: './src/connectors/captcha.html',
        filename: 'captcha-connector.html',
        chunks: ['connectors/captcha'],
    }),
    new HtmlWebpackPlugin({
        template: './src/connectors/captcha-mobile.html',
        filename: 'captcha-mobile-connector.html',
        chunks: ['connectors/captcha'],
    }),
    new CopyWebpackPlugin({
        patterns:[
            { from: './src/.nojekyll' },
            { from: './src/manifest.json' },
            { from: './src/favicon.ico' },
            { from: './src/browserconfig.xml' },
            { from: './src/app-id.json' },
            { from: './src/404.html' },
            { from: './src/404', to: '404' },
            { from: './src/images', to: 'images' },
            { from: './src/locales', to: 'locales' },
            { from: './src/scripts', to: 'scripts' },
            { from: './node_modules/qrious/dist/qrious.min.js', to: 'scripts' },
            { from: './node_modules/braintree-web-drop-in/dist/browser/dropin.js', to: 'scripts' },
            {
                from: './src/version.json',
                transform (content, path) {
                    return content.toString().replace('process.env.APPLICATION_VERSION', pjson.version);
                },
            }
        ],
    }),
    new MiniCssExtractPlugin({
        filename: '[name].[contenthash].css',
        chunkFilename: '[id].[contenthash].css',
    }),
    new webpack.EnvironmentPlugin({
        'ENV': ENV,
        'NODE_ENV': NODE_ENV === 'production' ? 'production' : 'development',
        'APPLICATION_VERSION': pjson.version,
        'CACHE_TAG': Math.random().toString(36).substring(7),
        'URLS': envConfig['urls'] ?? {},
        'STRIPE_KEY': envConfig['stripeKey'] ?? '', 
        'BRAINTREE_KEY': envConfig['braintreeKey'] ?? '',
        'PAYPAL_CONFIG': envConfig['paypal'] ?? {},
    }),
    new webpack.ProvidePlugin({
        process: 'process/browser',
    }),
    new AngularWebpackPlugin({
        tsConfigPath: 'tsconfig.json',
        entryModule: 'src/app/app.module#AppModule',
        sourceMap: true,
    }),
];

// ref: https://webpack.js.org/configuration/dev-server/#devserver
let certSuffix = fs.existsSync('dev-server.local.pem') ? '.local' : '.shared';
const devServer = NODE_ENV !== 'development' ? {} : {
    server: {
        type: 'https',
        options: {
            key: fs.readFileSync('dev-server' + certSuffix + '.pem'),
            cert: fs.readFileSync('dev-server' + certSuffix + '.pem'),
        },
    },
    // host: '192.168.1.9',
    proxy: {
        '/api': {
            target: envConfig.dev?.proxyApi,
            pathRewrite: {'^/api' : ''},
            secure: false,
            changeOrigin: true
        },
        '/identity': {
            target: envConfig.dev?.proxyIdentity,
            pathRewrite: {'^/identity' : ''},
            secure: false,
            changeOrigin: true
        },
        '/events': {
            target: envConfig.dev?.proxyEvents,
            pathRewrite: {'^/events' : ''},
            secure: false,
            changeOrigin: true
        },
        '/notifications': {
            target: envConfig.dev?.proxyNotifications,
            pathRewrite: {'^/notifications' : ''},
            secure: false,
            changeOrigin: true
        },
    },
    hot: false,
    allowedHosts: envConfig.dev?.allowedHosts ?? 'auto',
    client: {
        overlay: {
            errors: true,
            warnings: false,
        },
    },
};

const webpackConfig = {
    mode: NODE_ENV,
    devtool: 'source-map',
    devServer: devServer,
    entry: {
        'app/polyfills': './src/app/polyfills.ts',
        'app/main': './src/app/main.ts',
        'connectors/u2f': './src/connectors/u2f.js',
        'connectors/webauthn': './src/connectors/webauthn.ts',
        'connectors/webauthn-fallback': './src/connectors/webauthn-fallback.ts',
        'connectors/duo': './src/connectors/duo.ts',
        'connectors/sso': './src/connectors/sso.ts',
        'connectors/captcha': './src/connectors/captcha.ts',
        'theme_head': './src/theme.js',
    },
    externals: {
        'u2f': 'u2f',
    },
    optimization: {
        splitChunks: {
            cacheGroups: {
                commons: {
                    test: /[\\/]node_modules[\\/]/,
                    name: 'app/vendor',
                    chunks: (chunk) => {
                        return chunk.name === 'app/main';
                    },
                },
            },
        },
        minimizer: [
            new TerserPlugin({
                terserOptions: {
                    safari10: true,
                },
            }),
        ],
    },
    resolve: {
        extensions: ['.ts', '.js'],
        symlinks: false,
        modules: [path.resolve('node_modules')],
        fallback: {
            "buffer": false,
            "util": require.resolve("util/"),
            "assert": false,
        },
    },
    output: {
        filename: '[name].[contenthash].js',
        path: path.resolve(__dirname, 'build'),
    },
    module: { rules: moduleRules },
    plugins: plugins,
};

module.exports = webpackConfig;