"use strict";
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.dev/license
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.patchBaseMiddleware = patchBaseMiddleware;
const url_1 = require("../../../utils/url");
/**
 * Patches the Vite base middleware to correctly handle the Angular application's base href.
 * This is necessary because Vite's default base middleware might not align with Angular's
 * expected path handling when using SSR, especially when a base href is configured.
 *
 * @param middlewares The Connect server instance containing the middleware stack.
 * @param base The base URL path to be handled by the middleware.
 */
function patchBaseMiddleware(middlewares, base) {
    const entry = middlewares.stack.find(({ handle }) => typeof handle === 'function' && handle.name.startsWith('viteBaseMiddleware'));
    if (typeof entry?.handle !== 'function') {
        return;
    }
    entry.handle = function angularBaseMiddleware(req, res, next) {
        const url = req.url || '/';
        if (url.startsWith(base)) {
            // Rewrite the URL to remove the base prefix before passing it to the next middleware.
            // If the URL is exactly the base, it becomes '/'.
            // Otherwise, we slice off the base and ensure there's a leading slash.
            // See: https://github.com/vitejs/vite/blob/e81c183f8c8ccaf7774ef0d0ee125bf63dbf30b4/packages/vite/src/node/server/middlewares/base.ts#L12
            req.url = url === base ? '/' : (0, url_1.addLeadingSlash)(url.slice(base.length - 1));
            return next();
        }
        const { pathname, hash, search } = new URL(url, 'http://localhost');
        if (pathname === '/' || pathname === '/index.html') {
            res.writeHead(302, { Location: `${base}${search}${hash}` });
            res.end();
            return;
        }
        next();
    };
}
//# sourceMappingURL=base-middleware.js.map