import url from 'url';
import path from 'node:path';
import setupDebug from 'next/dist/compiled/debug';
import { getCloneableBody } from '../../body-streams';
import { filterReqHeaders, ipcForbiddenHeaders } from '../server-ipc/utils';
import { stringifyQuery } from '../../server-route-utils';
import { formatHostname } from '../format-hostname';
import { toNodeOutgoingHttpHeaders } from '../../web/utils';
import { isAbortError } from '../../pipe-readable';
import { getHostname } from '../../../shared/lib/get-hostname';
import { getRedirectStatus } from '../../../lib/redirect-status';
import { normalizeRepeatedSlashes } from '../../../shared/lib/utils';
import { relativizeURL } from '../../../shared/lib/router/utils/relativize-url';
import { addPathPrefix } from '../../../shared/lib/router/utils/add-path-prefix';
import { pathHasPrefix } from '../../../shared/lib/router/utils/path-has-prefix';
import { detectDomainLocale } from '../../../shared/lib/i18n/detect-domain-locale';
import { normalizeLocalePath } from '../../../shared/lib/i18n/normalize-locale-path';
import { removePathPrefix } from '../../../shared/lib/router/utils/remove-path-prefix';
import { NextDataPathnameNormalizer } from '../../normalizers/request/next-data';
import { BasePathPathnameNormalizer } from '../../normalizers/request/base-path';
import { addRequestMeta } from '../../request-meta';
import { compileNonPath, matchHas, prepareDestination } from '../../../shared/lib/router/utils/prepare-destination';
import { NEXT_ROUTER_STATE_TREE_HEADER } from '../../../client/components/app-router-headers';
import { getSelectedParams } from '../../../client/components/router-reducer/compute-changed-path';
import { isInterceptionRouteRewrite } from '../../../lib/generate-interception-routes-rewrites';
import { parseAndValidateFlightRouterState } from '../../app-render/parse-and-validate-flight-router-state';
const debug = setupDebug('next:router-server:resolve-routes');
export function getResolveRoutes(fsChecker, config, opts, renderServer, renderServerOpts, ensureMiddleware) {
    const routes = [
        // _next/data with middleware handling
        {
            match: ()=>({}),
            name: 'middleware_next_data'
        },
        ...opts.minimalMode ? [] : fsChecker.headers,
        ...opts.minimalMode ? [] : fsChecker.redirects,
        // check middleware (using matchers)
        {
            match: ()=>({}),
            name: 'middleware'
        },
        ...opts.minimalMode ? [] : fsChecker.rewrites.beforeFiles,
        // check middleware (using matchers)
        {
            match: ()=>({}),
            name: 'before_files_end'
        },
        // we check exact matches on fs before continuing to
        // after files rewrites
        {
            match: ()=>({}),
            name: 'check_fs'
        },
        ...opts.minimalMode ? [] : fsChecker.rewrites.afterFiles,
        // we always do the check: true handling before continuing to
        // fallback rewrites
        {
            check: true,
            match: ()=>({}),
            name: 'after files check: true'
        },
        ...opts.minimalMode ? [] : fsChecker.rewrites.fallback
    ];
    async function resolveRoutes({ req, res, isUpgradeReq, invokedOutputs }) {
        var _req_socket, _req_headers_xforwardedproto;
        let finished = false;
        let resHeaders = {};
        let matchedOutput = null;
        let parsedUrl = url.parse(req.url || '', true);
        let didRewrite = false;
        const urlParts = (req.url || '').split('?', 1);
        const urlNoQuery = urlParts[0];
        // this normalizes repeated slashes in the path e.g. hello//world ->
        // hello/world or backslashes to forward slashes, this does not
        // handle trailing slash as that is handled the same as a next.config.js
        // redirect
        if (urlNoQuery == null ? void 0 : urlNoQuery.match(/(\\|\/\/)/)) {
            parsedUrl = url.parse(normalizeRepeatedSlashes(req.url), true);
            return {
                parsedUrl,
                resHeaders,
                finished: true,
                statusCode: 308
            };
        }
        // TODO: inherit this from higher up
        const protocol = (req == null ? void 0 : (_req_socket = req.socket) == null ? void 0 : _req_socket.encrypted) || ((_req_headers_xforwardedproto = req.headers['x-forwarded-proto']) == null ? void 0 : _req_headers_xforwardedproto.includes('https')) ? 'https' : 'http';
        // When there are hostname and port we build an absolute URL
        const initUrl = config.experimental.trustHostHeader ? `https://${req.headers.host || 'localhost'}${req.url}` : opts.port ? `${protocol}://${formatHostname(opts.hostname || 'localhost')}:${opts.port}${req.url}` : req.url || '';
        addRequestMeta(req, 'initURL', initUrl);
        addRequestMeta(req, 'initQuery', {
            ...parsedUrl.query
        });
        addRequestMeta(req, 'initProtocol', protocol);
        if (!isUpgradeReq) {
            addRequestMeta(req, 'clonableBody', getCloneableBody(req));
        }
        const maybeAddTrailingSlash = (pathname)=>{
            if (config.trailingSlash && !config.skipMiddlewareUrlNormalize && !pathname.endsWith('/')) {
                return `${pathname}/`;
            }
            return pathname;
        };
        let domainLocale;
        let defaultLocale;
        let initialLocaleResult = undefined;
        if (config.i18n) {
            var _parsedUrl_pathname;
            const hadTrailingSlash = (_parsedUrl_pathname = parsedUrl.pathname) == null ? void 0 : _parsedUrl_pathname.endsWith('/');
            const hadBasePath = pathHasPrefix(parsedUrl.pathname || '', config.basePath);
            initialLocaleResult = normalizeLocalePath(removePathPrefix(parsedUrl.pathname || '/', config.basePath), config.i18n.locales);
            domainLocale = detectDomainLocale(config.i18n.domains, getHostname(parsedUrl, req.headers));
            defaultLocale = (domainLocale == null ? void 0 : domainLocale.defaultLocale) || config.i18n.defaultLocale;
            parsedUrl.query.__nextDefaultLocale = defaultLocale;
            parsedUrl.query.__nextLocale = initialLocaleResult.detectedLocale || defaultLocale;
            // ensure locale is present for resolving routes
            if (!initialLocaleResult.detectedLocale && !initialLocaleResult.pathname.startsWith('/_next/')) {
                parsedUrl.pathname = addPathPrefix(initialLocaleResult.pathname === '/' ? `/${defaultLocale}` : addPathPrefix(initialLocaleResult.pathname || '', `/${defaultLocale}`), hadBasePath ? config.basePath : '');
                if (hadTrailingSlash) {
                    parsedUrl.pathname = maybeAddTrailingSlash(parsedUrl.pathname);
                }
            }
        } else {
            // As i18n isn't configured we remove the locale related query params.
            delete parsedUrl.query.__nextLocale;
            delete parsedUrl.query.__nextDefaultLocale;
            delete parsedUrl.query.__nextInferredLocaleFromDefault;
        }
        const checkLocaleApi = (pathname)=>{
            if (config.i18n && pathname === urlNoQuery && (initialLocaleResult == null ? void 0 : initialLocaleResult.detectedLocale) && pathHasPrefix(initialLocaleResult.pathname, '/api')) {
                return true;
            }
        };
        async function checkTrue() {
            const pathname = parsedUrl.pathname || '';
            if (checkLocaleApi(pathname)) {
                return;
            }
            if (!(invokedOutputs == null ? void 0 : invokedOutputs.has(pathname))) {
                const output = await fsChecker.getItem(pathname);
                if (output) {
                    if (config.useFileSystemPublicRoutes || didRewrite || output.type !== 'appFile' && output.type !== 'pageFile') {
                        return output;
                    }
                }
            }
            const dynamicRoutes = fsChecker.getDynamicRoutes();
            let curPathname = parsedUrl.pathname;
            if (config.basePath) {
                if (!pathHasPrefix(curPathname || '', config.basePath)) {
                    return;
                }
                curPathname = (curPathname == null ? void 0 : curPathname.substring(config.basePath.length)) || '/';
            }
            const localeResult = fsChecker.handleLocale(curPathname || '');
            for (const route of dynamicRoutes){
                // when resolving fallback: false the
                // render worker may return a no-fallback response
                // which signals we need to continue resolving.
                // TODO: optimize this to collect static paths
                // to use at the routing layer
                if (invokedOutputs == null ? void 0 : invokedOutputs.has(route.page)) {
                    continue;
                }
                const params = route.match(localeResult.pathname);
                if (params) {
                    const pageOutput = await fsChecker.getItem(addPathPrefix(route.page, config.basePath || ''));
                    // i18n locales aren't matched for app dir
                    if ((pageOutput == null ? void 0 : pageOutput.type) === 'appFile' && (initialLocaleResult == null ? void 0 : initialLocaleResult.detectedLocale)) {
                        continue;
                    }
                    if (pageOutput && (curPathname == null ? void 0 : curPathname.startsWith('/_next/data'))) {
                        parsedUrl.query.__nextDataReq = '1';
                    }
                    if (config.useFileSystemPublicRoutes || didRewrite) {
                        return pageOutput;
                    }
                }
            }
        }
        const normalizers = {
            basePath: config.basePath && config.basePath !== '/' ? new BasePathPathnameNormalizer(config.basePath) : undefined,
            data: new NextDataPathnameNormalizer(fsChecker.buildId)
        };
        async function handleRoute(route) {
            let curPathname = parsedUrl.pathname || '/';
            if (config.i18n && route.internal) {
                const hadTrailingSlash = curPathname.endsWith('/');
                if (config.basePath) {
                    curPathname = removePathPrefix(curPathname, config.basePath);
                }
                const hadBasePath = curPathname !== parsedUrl.pathname;
                const localeResult = normalizeLocalePath(curPathname, config.i18n.locales);
                const isDefaultLocale = localeResult.detectedLocale === defaultLocale;
                if (isDefaultLocale) {
                    curPathname = localeResult.pathname === '/' && hadBasePath ? config.basePath : addPathPrefix(localeResult.pathname, hadBasePath ? config.basePath : '');
                } else if (hadBasePath) {
                    curPathname = curPathname === '/' ? config.basePath : addPathPrefix(curPathname, config.basePath);
                }
                if ((isDefaultLocale || hadBasePath) && hadTrailingSlash) {
                    curPathname = maybeAddTrailingSlash(curPathname);
                }
            }
            let params = route.match(curPathname);
            if ((route.has || route.missing) && params) {
                const hasParams = matchHas(req, parsedUrl.query, route.has, route.missing);
                if (hasParams) {
                    Object.assign(params, hasParams);
                } else {
                    params = false;
                }
            }
            if (params) {
                if (fsChecker.exportPathMapRoutes && route.name === 'before_files_end') {
                    for (const exportPathMapRoute of fsChecker.exportPathMapRoutes){
                        const result = await handleRoute(exportPathMapRoute);
                        if (result) {
                            return result;
                        }
                    }
                }
                if (route.name === 'middleware_next_data' && parsedUrl.pathname) {
                    var _fsChecker_getMiddlewareMatchers;
                    if ((_fsChecker_getMiddlewareMatchers = fsChecker.getMiddlewareMatchers()) == null ? void 0 : _fsChecker_getMiddlewareMatchers.length) {
                        var _normalizers_basePath;
                        let normalized = parsedUrl.pathname;
                        // Remove the base path if it exists.
                        const hadBasePath = (_normalizers_basePath = normalizers.basePath) == null ? void 0 : _normalizers_basePath.match(parsedUrl.pathname);
                        if (hadBasePath && normalizers.basePath) {
                            normalized = normalizers.basePath.normalize(normalized, true);
                        }
                        let updated = false;
                        if (normalizers.data.match(normalized)) {
                            updated = true;
                            parsedUrl.query.__nextDataReq = '1';
                            normalized = normalizers.data.normalize(normalized, true);
                        }
                        if (config.i18n) {
                            const curLocaleResult = normalizeLocalePath(normalized, config.i18n.locales);
                            if (curLocaleResult.detectedLocale) {
                                parsedUrl.query.__nextLocale = curLocaleResult.detectedLocale;
                            }
                        }
                        // If we updated the pathname, and it had a base path, re-add the
                        // base path.
                        if (updated) {
                            if (hadBasePath) {
                                normalized = path.posix.join(config.basePath, normalized);
                            }
                            // Re-add the trailing slash (if required).
                            normalized = maybeAddTrailingSlash(normalized);
                            parsedUrl.pathname = normalized;
                        }
                    }
                }
                if (route.name === 'check_fs') {
                    const pathname = parsedUrl.pathname || '';
                    if ((invokedOutputs == null ? void 0 : invokedOutputs.has(pathname)) || checkLocaleApi(pathname)) {
                        return;
                    }
                    const output = await fsChecker.getItem(pathname);
                    if (output && !(config.i18n && (initialLocaleResult == null ? void 0 : initialLocaleResult.detectedLocale) && pathHasPrefix(pathname, '/api'))) {
                        if (config.useFileSystemPublicRoutes || didRewrite || output.type !== 'appFile' && output.type !== 'pageFile') {
                            matchedOutput = output;
                            if (output.locale) {
                                parsedUrl.query.__nextLocale = output.locale;
                            }
                            return {
                                parsedUrl,
                                resHeaders,
                                finished: true,
                                matchedOutput
                            };
                        }
                    }
                }
                if (!opts.minimalMode && route.name === 'middleware') {
                    const match = fsChecker.getMiddlewareMatchers();
                    if (// @ts-expect-error BaseNextRequest stuff
                    match == null ? void 0 : match(parsedUrl.pathname, req, parsedUrl.query)) {
                        if (ensureMiddleware) {
                            await ensureMiddleware(req.url);
                        }
                        const serverResult = await (renderServer == null ? void 0 : renderServer.initialize(renderServerOpts));
                        if (!serverResult) {
                            throw Object.defineProperty(new Error(`Failed to initialize render server "middleware"`), "__NEXT_ERROR_CODE", {
                                value: "E222",
                                enumerable: false
                            });
                        }
                        addRequestMeta(req, 'invokePath', '');
                        addRequestMeta(req, 'invokeOutput', '');
                        addRequestMeta(req, 'invokeQuery', {});
                        addRequestMeta(req, 'middlewareInvoke', true);
                        debug('invoking middleware', req.url, req.headers);
                        let middlewareRes = undefined;
                        let bodyStream = undefined;
                        try {
                            try {
                                await serverResult.requestHandler(req, res, parsedUrl);
                            } catch (err) {
                                if (!('result' in err) || !('response' in err.result)) {
                                    throw err;
                                }
                                middlewareRes = err.result.response;
                                res.statusCode = middlewareRes.status;
                                if (middlewareRes.body) {
                                    bodyStream = middlewareRes.body;
                                } else if (middlewareRes.status) {
                                    bodyStream = new ReadableStream({
                                        start (controller) {
                                            controller.enqueue('');
                                            controller.close();
                                        }
                                    });
                                }
                            }
                        } catch (e) {
                            // If the client aborts before we can receive a response object
                            // (when the headers are flushed), then we can early exit without
                            // further processing.
                            if (isAbortError(e)) {
                                return {
                                    parsedUrl,
                                    resHeaders,
                                    finished: true
                                };
                            }
                            throw e;
                        }
                        if (res.closed || res.finished || !middlewareRes) {
                            return {
                                parsedUrl,
                                resHeaders,
                                finished: true
                            };
                        }
                        const middlewareHeaders = toNodeOutgoingHttpHeaders(middlewareRes.headers);
                        debug('middleware res', middlewareRes.status, middlewareHeaders);
                        if (middlewareHeaders['x-middleware-override-headers']) {
                            const overriddenHeaders = new Set();
                            let overrideHeaders = middlewareHeaders['x-middleware-override-headers'];
                            if (typeof overrideHeaders === 'string') {
                                overrideHeaders = overrideHeaders.split(',');
                            }
                            for (const key of overrideHeaders){
                                overriddenHeaders.add(key.trim());
                            }
                            delete middlewareHeaders['x-middleware-override-headers'];
                            // Delete headers.
                            for (const key of Object.keys(req.headers)){
                                if (!overriddenHeaders.has(key)) {
                                    delete req.headers[key];
                                }
                            }
                            // Update or add headers.
                            for (const key of overriddenHeaders.keys()){
                                const valueKey = 'x-middleware-request-' + key;
                                const newValue = middlewareHeaders[valueKey];
                                const oldValue = req.headers[key];
                                if (oldValue !== newValue) {
                                    req.headers[key] = newValue === null ? undefined : newValue;
                                }
                                delete middlewareHeaders[valueKey];
                            }
                        }
                        if (!middlewareHeaders['x-middleware-rewrite'] && !middlewareHeaders['x-middleware-next'] && !middlewareHeaders['location']) {
                            middlewareHeaders['x-middleware-refresh'] = '1';
                        }
                        delete middlewareHeaders['x-middleware-next'];
                        for (const [key, value] of Object.entries({
                            ...filterReqHeaders(middlewareHeaders, ipcForbiddenHeaders)
                        })){
                            if ([
                                'content-length',
                                'x-middleware-rewrite',
                                'x-middleware-redirect',
                                'x-middleware-refresh'
                            ].includes(key)) {
                                continue;
                            }
                            // for set-cookie, the header shouldn't be added to the response
                            // as it's only needed for the request to the middleware function.
                            if (key === 'x-middleware-set-cookie') {
                                req.headers[key] = value;
                                continue;
                            }
                            if (value) {
                                resHeaders[key] = value;
                                req.headers[key] = value;
                            }
                        }
                        if (middlewareHeaders['x-middleware-rewrite']) {
                            const value = middlewareHeaders['x-middleware-rewrite'];
                            const rel = relativizeURL(value, initUrl);
                            resHeaders['x-middleware-rewrite'] = rel;
                            const query = parsedUrl.query;
                            parsedUrl = url.parse(rel, true);
                            if (parsedUrl.protocol) {
                                return {
                                    parsedUrl,
                                    resHeaders,
                                    finished: true
                                };
                            }
                            // keep internal query state
                            for (const key of Object.keys(query)){
                                if (key.startsWith('_next') || key.startsWith('__next')) {
                                    parsedUrl.query[key] = query[key];
                                }
                            }
                            if (config.i18n) {
                                const curLocaleResult = normalizeLocalePath(parsedUrl.pathname || '', config.i18n.locales);
                                if (curLocaleResult.detectedLocale) {
                                    parsedUrl.query.__nextLocale = curLocaleResult.detectedLocale;
                                }
                            }
                        }
                        if (middlewareHeaders['location']) {
                            const value = middlewareHeaders['location'];
                            const rel = relativizeURL(value, initUrl);
                            resHeaders['location'] = rel;
                            parsedUrl = url.parse(rel, true);
                            return {
                                parsedUrl,
                                resHeaders,
                                finished: true,
                                statusCode: middlewareRes.status
                            };
                        }
                        if (middlewareHeaders['x-middleware-refresh']) {
                            return {
                                parsedUrl,
                                resHeaders,
                                finished: true,
                                bodyStream,
                                statusCode: middlewareRes.status
                            };
                        }
                    }
                }
                // handle redirect
                if (('statusCode' in route || 'permanent' in route) && route.destination) {
                    const { parsedDestination } = prepareDestination({
                        appendParamsToQuery: false,
                        destination: route.destination,
                        params: params,
                        query: parsedUrl.query
                    });
                    const { query } = parsedDestination;
                    delete parsedDestination.query;
                    parsedDestination.search = stringifyQuery(req, query);
                    parsedDestination.pathname = normalizeRepeatedSlashes(parsedDestination.pathname);
                    return {
                        finished: true,
                        // @ts-expect-error custom ParsedUrl
                        parsedUrl: parsedDestination,
                        statusCode: getRedirectStatus(route)
                    };
                }
                // handle headers
                if (route.headers) {
                    const hasParams = Object.keys(params).length > 0;
                    for (const header of route.headers){
                        let { key, value } = header;
                        if (hasParams) {
                            key = compileNonPath(key, params);
                            value = compileNonPath(value, params);
                        }
                        if (key.toLowerCase() === 'set-cookie') {
                            if (!Array.isArray(resHeaders[key])) {
                                const val = resHeaders[key];
                                resHeaders[key] = typeof val === 'string' ? [
                                    val
                                ] : [];
                            }
                            ;
                            resHeaders[key].push(value);
                        } else {
                            resHeaders[key] = value;
                        }
                    }
                }
                // handle rewrite
                if (route.destination) {
                    let rewriteParams = params;
                    try {
                        // An interception rewrite might reference a dynamic param for a route the user
                        // is currently on, which wouldn't be extractable from the matched route params.
                        // This attempts to extract the dynamic params from the provided router state.
                        if (isInterceptionRouteRewrite(route)) {
                            const stateHeader = req.headers[NEXT_ROUTER_STATE_TREE_HEADER.toLowerCase()];
                            if (stateHeader) {
                                rewriteParams = {
                                    ...getSelectedParams(parseAndValidateFlightRouterState(stateHeader)),
                                    ...params
                                };
                            }
                        }
                    } catch (err) {
                    // this is a no-op -- we couldn't extract dynamic params from the provided router state,
                    // so we'll just use the params from the route matcher
                    }
                    const { parsedDestination } = prepareDestination({
                        appendParamsToQuery: true,
                        destination: route.destination,
                        params: rewriteParams,
                        query: parsedUrl.query
                    });
                    if (parsedDestination.protocol) {
                        return {
                            // @ts-expect-error custom ParsedUrl
                            parsedUrl: parsedDestination,
                            finished: true
                        };
                    }
                    if (config.i18n) {
                        const curLocaleResult = normalizeLocalePath(removePathPrefix(parsedDestination.pathname, config.basePath), config.i18n.locales);
                        if (curLocaleResult.detectedLocale) {
                            parsedUrl.query.__nextLocale = curLocaleResult.detectedLocale;
                        }
                    }
                    didRewrite = true;
                    parsedUrl.pathname = parsedDestination.pathname;
                    Object.assign(parsedUrl.query, parsedDestination.query);
                }
                // handle check: true
                if (route.check) {
                    const output = await checkTrue();
                    if (output) {
                        return {
                            parsedUrl,
                            resHeaders,
                            finished: true,
                            matchedOutput: output
                        };
                    }
                }
            }
        }
        for (const route of routes){
            const result = await handleRoute(route);
            if (result) {
                return result;
            }
        }
        return {
            finished,
            parsedUrl,
            resHeaders,
            matchedOutput
        };
    }
    return resolveRoutes;
}

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