'use strict';

const fs = require('fs');
const evalSourceMapMiddleware = require('react-dev-utils/evalSourceMapMiddleware');
const noopServiceWorkerMiddleware = require('react-dev-utils/noopServiceWorkerMiddleware');
const ignoredFiles = require('react-dev-utils/ignoredFiles');
const redirectServedPath = require('react-dev-utils/redirectServedPathMiddleware');
const paths = require('./paths');
const getHttpsConfig = require('./getHttpsConfig');

const host = process.env.HOST || '0.0.0.0';
const sockHost = process.env.WDS_SOCKET_HOST;
const sockPath = process.env.WDS_SOCKET_PATH; // default: '/sockjs-node'
const sockPort = process.env.WDS_SOCKET_PORT;

module.exports = function (proxy, allowedHost) {
    const disableFirewall =
        !proxy || process.env.DANGEROUSLY_DISABLE_HOST_CHECK === "true";
    return {
        allowedHosts: disableFirewall ? "all" : [allowedHost],
        compress: true,
        static: {
            directory: paths.appPublic,
            publicPath: paths.publicUrlOrPath,
            watch: {
                ignored: ignoredFiles(paths.appSrc),
            }
        },
        client: {
            webSocketURL: {
                hostname: sockHost,
                pathname: sockPath,
                port: sockPort,
            },
            overlay: true,
        },
        devMiddleware: {
            // It is important to tell WebpackDevServer to use the same "publicPath" path as
            // we specified in the webpack config. When homepage is '.', default to serving
            // from the root.
            // remove last slash so user can land on `/test` instead of `/test/`
            publicPath: paths.publicUrlOrPath.slice(0, -1),
        },
        https: getHttpsConfig(),
        host,
        historyApiFallback: {
            // Paths with dots should still use the history fallback.
            // See https://github.com/facebook/create-react-app/issues/387.
            disableDotRule: true,
            index: paths.publicUrlOrPath,
        },
        // `proxy` is run between `before` and `after` `webpack-dev-server` hooks
        proxy,
        onBeforeSetupMiddleware(server) {
            const app = server.app;
            // Keep `evalSourceMapMiddleware`
            // middlewares before `redirectServedPath` otherwise will not have any effect
            // This lets us fetch source contents from webpack for the error overlay
            app.use(evalSourceMapMiddleware(server));

            if (fs.existsSync(paths.proxySetup)) {
                // This registers user provided middleware for proxy reasons
                require(paths.proxySetup)(app);
            }
        },
        onAfterSetupMiddleware(server) {
            const app = server.app;
            // Redirect to `PUBLIC_URL` or `homepage` from `package.json` if url not match
            app.use(redirectServedPath(paths.publicUrlOrPath));

            // This service worker file is effectively a 'no-op' that will reset any
            // previous service worker registered for the same host:port combination.
            // We do this in development to avoid hitting the production cache if
            // it used the same host and port.
            // https://github.com/facebook/create-react-app/issues/2272#issuecomment-302832432
            app.use(noopServiceWorkerMiddleware(paths.publicUrlOrPath));
        },
    };
};