import { PageSignatureError } from "./error";
import { fromNodeOutgoingHttpHeaders } from "./utils";
import { NextFetchEvent } from "./spec-extension/fetch-event";
import { NextRequest } from "./spec-extension/request";
import { NextResponse } from "./spec-extension/response";
import { relativizeURL } from "../../shared/lib/router/utils/relativize-url";
import { waitUntilSymbol } from "./spec-extension/fetch-event";
import { NextURL } from "./next-url";
import { stripInternalSearchParams } from "../internal-utils";
import { normalizeRscPath } from "../../shared/lib/router/utils/app-paths";
import { FETCH_CACHE_HEADER, NEXT_ROUTER_PREFETCH, NEXT_ROUTER_STATE_TREE, RSC } from "../../client/components/app-router-headers";
import { NEXT_QUERY_PARAM_PREFIX } from "../../lib/constants";
import { ensureInstrumentationRegistered } from "./globals";
class NextRequestHint extends NextRequest {
    constructor(params){
        super(params.input, params.init);
        this.sourcePage = params.page;
    }
    get request() {
        throw new PageSignatureError({
            page: this.sourcePage
        });
    }
    respondWith() {
        throw new PageSignatureError({
            page: this.sourcePage
        });
    }
    waitUntil() {
        throw new PageSignatureError({
            page: this.sourcePage
        });
    }
}
const FLIGHT_PARAMETERS = [
    [
        RSC
    ],
    [
        NEXT_ROUTER_STATE_TREE
    ],
    [
        NEXT_ROUTER_PREFETCH
    ],
    [
        FETCH_CACHE_HEADER
    ]
];
export async function adapter(params) {
    await ensureInstrumentationRegistered();
    // TODO-APP: use explicit marker for this
    const isEdgeRendering = typeof self.__BUILD_MANIFEST !== "undefined";
    params.request.url = normalizeRscPath(params.request.url, true);
    const requestUrl = new NextURL(params.request.url, {
        headers: params.request.headers,
        nextConfig: params.request.nextConfig
    });
    // Iterator uses an index to keep track of the current iteration. Because of deleting and appending below we can't just use the iterator.
    // Instead we use the keys before iteration.
    const keys = [
        ...requestUrl.searchParams.keys()
    ];
    for (const key of keys){
        const value = requestUrl.searchParams.getAll(key);
        if (key !== NEXT_QUERY_PARAM_PREFIX && key.startsWith(NEXT_QUERY_PARAM_PREFIX)) {
            const normalizedKey = key.substring(NEXT_QUERY_PARAM_PREFIX.length);
            requestUrl.searchParams.delete(normalizedKey);
            for (const val of value){
                requestUrl.searchParams.append(normalizedKey, val);
            }
            requestUrl.searchParams.delete(key);
        }
    }
    // Ensure users only see page requests, never data requests.
    const buildId = requestUrl.buildId;
    requestUrl.buildId = "";
    const isDataReq = params.request.headers["x-nextjs-data"];
    if (isDataReq && requestUrl.pathname === "/index") {
        requestUrl.pathname = "/";
    }
    const requestHeaders = fromNodeOutgoingHttpHeaders(params.request.headers);
    const flightHeaders = new Map();
    // Parameters should only be stripped for middleware
    if (!isEdgeRendering) {
        for (const param of FLIGHT_PARAMETERS){
            const key = param.toString().toLowerCase();
            const value = requestHeaders.get(key);
            if (value) {
                flightHeaders.set(key, requestHeaders.get(key));
                requestHeaders.delete(key);
            }
        }
    }
    const normalizeUrl = process.env.__NEXT_NO_MIDDLEWARE_URL_NORMALIZE ? new URL(params.request.url) : requestUrl;
    const request = new NextRequestHint({
        page: params.page,
        // Strip internal query parameters off the request.
        input: stripInternalSearchParams(normalizeUrl, true).toString(),
        init: {
            body: params.request.body,
            geo: params.request.geo,
            headers: requestHeaders,
            ip: params.request.ip,
            method: params.request.method,
            nextConfig: params.request.nextConfig,
            signal: params.request.signal
        }
    });
    /**
   * This allows to identify the request as a data request. The user doesn't
   * need to know about this property neither use it. We add it for testing
   * purposes.
   */ if (isDataReq) {
        Object.defineProperty(request, "__isData", {
            enumerable: false,
            value: true
        });
    }
    if (!globalThis.__incrementalCache && params.IncrementalCache) {
        globalThis.__incrementalCache = new params.IncrementalCache({
            appDir: true,
            fetchCache: true,
            minimalMode: process.env.NODE_ENV !== "development",
            fetchCacheKeyPrefix: process.env.__NEXT_FETCH_CACHE_KEY_PREFIX,
            dev: process.env.NODE_ENV === "development",
            requestHeaders: params.request.headers,
            requestProtocol: "https",
            getPrerenderManifest: ()=>{
                return {
                    version: -1,
                    routes: {},
                    dynamicRoutes: {},
                    notFoundRoutes: [],
                    preview: {
                        previewModeId: "development-id"
                    }
                };
            }
        });
    }
    const event = new NextFetchEvent({
        request,
        page: params.page
    });
    let response = await params.handler(request, event);
    // check if response is a Response object
    if (response && !(response instanceof Response)) {
        throw new TypeError("Expected an instance of Response to be returned");
    }
    /**
   * For rewrites we must always include the locale in the final pathname
   * so we re-create the NextURL forcing it to include it when the it is
   * an internal rewrite. Also we make sure the outgoing rewrite URL is
   * a data URL if the request was a data request.
   */ const rewrite = response == null ? void 0 : response.headers.get("x-middleware-rewrite");
    if (response && rewrite) {
        const rewriteUrl = new NextURL(rewrite, {
            forceLocale: true,
            headers: params.request.headers,
            nextConfig: params.request.nextConfig
        });
        if (!process.env.__NEXT_NO_MIDDLEWARE_URL_NORMALIZE) {
            if (rewriteUrl.host === request.nextUrl.host) {
                rewriteUrl.buildId = buildId || rewriteUrl.buildId;
                response.headers.set("x-middleware-rewrite", String(rewriteUrl));
            }
        }
        /**
     * When the request is a data request we must show if there was a rewrite
     * with an internal header so the client knows which component to load
     * from the data request.
     */ const relativizedRewrite = relativizeURL(String(rewriteUrl), String(requestUrl));
        if (isDataReq && // if the rewrite is external and external rewrite
        // resolving config is enabled don't add this header
        // so the upstream app can set it instead
        !(process.env.__NEXT_EXTERNAL_MIDDLEWARE_REWRITE_RESOLVE && relativizedRewrite.match(/http(s)?:\/\//))) {
            response.headers.set("x-nextjs-rewrite", relativizedRewrite);
        }
    }
    /**
   * For redirects we will not include the locale in case when it is the
   * default and we must also make sure the outgoing URL is a data one if
   * the incoming request was a data request.
   */ const redirect = response == null ? void 0 : response.headers.get("Location");
    if (response && redirect && !isEdgeRendering) {
        const redirectURL = new NextURL(redirect, {
            forceLocale: false,
            headers: params.request.headers,
            nextConfig: params.request.nextConfig
        });
        /**
     * Responses created from redirects have immutable headers so we have
     * to clone the response to be able to modify it.
     */ response = new Response(response.body, response);
        if (!process.env.__NEXT_NO_MIDDLEWARE_URL_NORMALIZE) {
            if (redirectURL.host === request.nextUrl.host) {
                redirectURL.buildId = buildId || redirectURL.buildId;
                response.headers.set("Location", String(redirectURL));
            }
        }
        /**
     * When the request is a data request we can't use the location header as
     * it may end up with CORS error. Instead we map to an internal header so
     * the client knows the destination.
     */ if (isDataReq) {
            response.headers.delete("Location");
            response.headers.set("x-nextjs-redirect", relativizeURL(String(redirectURL), String(requestUrl)));
        }
    }
    const finalResponse = response ? response : NextResponse.next();
    // Flight headers are not overridable / removable so they are applied at the end.
    const middlewareOverrideHeaders = finalResponse.headers.get("x-middleware-override-headers");
    const overwrittenHeaders = [];
    if (middlewareOverrideHeaders) {
        for (const [key, value] of flightHeaders){
            finalResponse.headers.set(`x-middleware-request-${key}`, value);
            overwrittenHeaders.push(key);
        }
        if (overwrittenHeaders.length > 0) {
            finalResponse.headers.set("x-middleware-override-headers", middlewareOverrideHeaders + "," + overwrittenHeaders.join(","));
        }
    }
    return {
        response: finalResponse,
        waitUntil: Promise.all(event[waitUntilSymbol])
    };
}

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