import { mkdir, writeFile } from "fs/promises";
import { join } from "path";
import ws from "next/dist/compiled/ws";
import { store as consoleStore } from "../../build/output/store";
import { HMR_ACTIONS_SENT_TO_BROWSER } from "./hot-reloader-types";
import { createDefineEnv } from "../../build/swc";
import * as Log from "../../build/output/log";
import { getVersionInfo, matchNextPageBundleRequest } from "./hot-reloader-webpack";
import { BLOCKED_PAGES } from "../../shared/lib/constants";
import { getOverlayMiddleware } from "../../client/components/react-dev-overlay/server/middleware-turbopack";
import { PageNotFoundError } from "../../shared/lib/utils";
import { debounce } from "../utils";
import { deleteAppClientCache, deleteCache } from "../../build/webpack/plugins/nextjs-require-cache-hot-reloader";
import { clearAllModuleContexts, clearModuleContext } from "../lib/render-server";
import { denormalizePagePath } from "../../shared/lib/page-path/denormalize-page-path";
import { trace } from "../../trace";
import { AssetMapper, formatIssue, getTurbopackJsConfig, handleEntrypoints, handlePagesErrorRoute, handleRouteType, hasEntrypointForKey, msToNs, processIssues, renderStyledStringToErrorAnsi, processTopLevelIssues, isWellKnownError, printNonFatalIssue } from "./turbopack-utils";
import { propagateServerField } from "../lib/router-utils/setup-dev-bundler";
import { TurbopackManifestLoader } from "./turbopack/manifest-loader";
import { findPagePathData } from "./on-demand-entry-handler";
import { getEntryKey, splitEntryKey } from "./turbopack/entry-key";
import { FAST_REFRESH_RUNTIME_RELOAD } from "./messages";
import { generateEncryptionKeyBase64 } from "../app-render/encryption-utils";
const wsServer = new ws.Server({
    noServer: true
});
const isTestMode = !!(process.env.NEXT_TEST_MODE || process.env.__NEXT_TEST_MODE || process.env.DEBUG);
export async function createHotReloaderTurbopack(opts, serverFields, distDir) {
    const buildId = "development";
    const { nextConfig, dir } = opts;
    const { loadBindings } = require("../../build/swc");
    let bindings = await loadBindings();
    // For the debugging purpose, check if createNext or equivalent next instance setup in test cases
    // works correctly. Normally `run-test` hides output so only will be visible when `--debug` flag is used.
    if (process.env.TURBOPACK && isTestMode) {
        require("console").log("Creating turbopack project", {
            dir,
            testMode: isTestMode
        });
    }
    const hasRewrites = opts.fsChecker.rewrites.afterFiles.length > 0 || opts.fsChecker.rewrites.beforeFiles.length > 0 || opts.fsChecker.rewrites.fallback.length > 0;
    const hotReloaderSpan = trace("hot-reloader", undefined, {
        version: "14.2.35"
    });
    // Ensure the hotReloaderSpan is flushed immediately as it's the parentSpan for all processing
    // of the current `next dev` invocation.
    hotReloaderSpan.stop();
    const encryptionKey = await generateEncryptionKeyBase64(true);
    const project = await bindings.turbo.createProject({
        projectPath: dir,
        rootPath: opts.nextConfig.experimental.outputFileTracingRoot || dir,
        nextConfig: opts.nextConfig,
        jsConfig: await getTurbopackJsConfig(dir, nextConfig),
        watch: true,
        dev: true,
        env: process.env,
        defineEnv: createDefineEnv({
            isTurbopack: true,
            // TODO: Implement
            clientRouterFilters: undefined,
            config: nextConfig,
            dev: true,
            distDir,
            fetchCacheKeyPrefix: opts.nextConfig.experimental.fetchCacheKeyPrefix,
            hasRewrites,
            // TODO: Implement
            middlewareMatchers: undefined
        }),
        buildId,
        encryptionKey,
        previewProps: opts.fsChecker.prerenderManifest.preview
    });
    const entrypointsSubscription = project.entrypointsSubscribe();
    const currentEntrypoints = {
        global: {
            app: undefined,
            document: undefined,
            error: undefined,
            middleware: undefined,
            instrumentation: undefined
        },
        page: new Map(),
        app: new Map()
    };
    const currentTopLevelIssues = new Map();
    const currentEntryIssues = new Map();
    const manifestLoader = new TurbopackManifestLoader({
        buildId,
        distDir,
        encryptionKey
    });
    // Dev specific
    const changeSubscriptions = new Map();
    const serverPathState = new Map();
    const readyIds = new Set();
    let currentEntriesHandlingResolve;
    let currentEntriesHandling = new Promise((resolve)=>currentEntriesHandlingResolve = resolve);
    const assetMapper = new AssetMapper();
    function clearRequireCache(key, writtenEndpoint) {
        // Figure out if the server files have changed
        let hasChange = false;
        for (const { path, contentHash } of writtenEndpoint.serverPaths){
            // We ignore source maps
            if (path.endsWith(".map")) continue;
            const localKey = `${key}:${path}`;
            const localHash = serverPathState.get(localKey);
            const globalHash = serverPathState.get(path);
            if (localHash && localHash !== contentHash || globalHash && globalHash !== contentHash) {
                hasChange = true;
                serverPathState.set(key, contentHash);
                serverPathState.set(path, contentHash);
            } else {
                if (!localHash) {
                    serverPathState.set(key, contentHash);
                }
                if (!globalHash) {
                    serverPathState.set(path, contentHash);
                }
            }
        }
        if (!hasChange) {
            return;
        }
        const hasAppPaths = writtenEndpoint.serverPaths.some(({ path: p })=>p.startsWith("server/app"));
        if (hasAppPaths) {
            deleteAppClientCache();
        }
        const serverPaths = writtenEndpoint.serverPaths.map(({ path: p })=>join(distDir, p));
        for (const file of serverPaths){
            clearModuleContext(file);
            deleteCache(file);
        }
        return;
    }
    const buildingIds = new Set();
    const startBuilding = (id, requestUrl, forceRebuild)=>{
        if (!forceRebuild && readyIds.has(id)) {
            return ()=>{};
        }
        if (buildingIds.size === 0) {
            consoleStore.setState({
                loading: true,
                trigger: id,
                url: requestUrl
            }, true);
        }
        buildingIds.add(id);
        return function finishBuilding() {
            if (buildingIds.size === 0) {
                return;
            }
            readyIds.add(id);
            buildingIds.delete(id);
            if (buildingIds.size === 0) {
                hmrEventHappened = false;
                consoleStore.setState({
                    loading: false
                }, true);
            }
        };
    };
    let hmrEventHappened = false;
    let hmrHash = 0;
    const clients = new Set();
    const clientStates = new WeakMap();
    function sendToClient(client, payload) {
        client.send(JSON.stringify(payload));
    }
    function sendEnqueuedMessages() {
        for (const [, issueMap] of currentEntryIssues){
            if ([
                ...issueMap.values()
            ].filter((i)=>i.severity !== "warning").length > 0) {
                // During compilation errors we want to delay the HMR events until errors are fixed
                return;
            }
        }
        for (const client of clients){
            const state = clientStates.get(client);
            if (!state) {
                continue;
            }
            for (const [, issueMap] of state.clientIssues){
                if ([
                    ...issueMap.values()
                ].filter((i)=>i.severity !== "warning").length > 0) {
                    // During compilation errors we want to delay the HMR events until errors are fixed
                    return;
                }
            }
            for (const payload of state.hmrPayloads.values()){
                sendToClient(client, payload);
            }
            state.hmrPayloads.clear();
            if (state.turbopackUpdates.length > 0) {
                sendToClient(client, {
                    action: HMR_ACTIONS_SENT_TO_BROWSER.TURBOPACK_MESSAGE,
                    data: state.turbopackUpdates
                });
                state.turbopackUpdates.length = 0;
            }
        }
    }
    const sendEnqueuedMessagesDebounce = debounce(sendEnqueuedMessages, 2);
    const sendHmr = (id, payload)=>{
        for (const client of clients){
            var _clientStates_get;
            (_clientStates_get = clientStates.get(client)) == null ? void 0 : _clientStates_get.hmrPayloads.set(id, payload);
        }
        hmrEventHappened = true;
        sendEnqueuedMessagesDebounce();
    };
    function sendTurbopackMessage(payload) {
        // TODO(PACK-2049): For some reason we end up emitting hundreds of issues messages on bigger apps,
        //   a lot of which are duplicates.
        //   They are currently not handled on the client at all, so might as well not send them for now.
        payload.diagnostics = [];
        payload.issues = [];
        for (const client of clients){
            var _clientStates_get;
            (_clientStates_get = clientStates.get(client)) == null ? void 0 : _clientStates_get.turbopackUpdates.push(payload);
        }
        hmrEventHappened = true;
        sendEnqueuedMessagesDebounce();
    }
    async function subscribeToChanges(key, includeIssues, endpoint, makePayload) {
        if (changeSubscriptions.has(key)) {
            return;
        }
        const { side } = splitEntryKey(key);
        const changedPromise = endpoint[`${side}Changed`](includeIssues);
        changeSubscriptions.set(key, changedPromise);
        const changed = await changedPromise;
        for await (const change of changed){
            processIssues(currentEntryIssues, key, change, false, true);
            const payload = await makePayload(change);
            if (payload) {
                sendHmr(key, payload);
            }
        }
    }
    async function unsubscribeFromChanges(key) {
        const subscription = await changeSubscriptions.get(key);
        if (subscription) {
            await (subscription.return == null ? void 0 : subscription.return.call(subscription));
            changeSubscriptions.delete(key);
        }
        currentEntryIssues.delete(key);
    }
    async function subscribeToHmrEvents(client, id) {
        const key = getEntryKey("assets", "client", id);
        if (!hasEntrypointForKey(currentEntrypoints, key, assetMapper)) {
            // maybe throw an error / force the client to reload?
            return;
        }
        const state = clientStates.get(client);
        if (!state || state.subscriptions.has(id)) {
            return;
        }
        const subscription = project.hmrEvents(id);
        state.subscriptions.set(id, subscription);
        // The subscription will always emit once, which is the initial
        // computation. This is not a change, so swallow it.
        try {
            await subscription.next();
            for await (const data of subscription){
                processIssues(state.clientIssues, key, data, false, true);
                if (data.type !== "issues") {
                    sendTurbopackMessage(data);
                }
            }
        } catch (e) {
            // The client might be using an HMR session from a previous server, tell them
            // to fully reload the page to resolve the issue. We can't use
            // `hotReloader.send` since that would force every connected client to
            // reload, only this client is out of date.
            const reloadAction = {
                action: HMR_ACTIONS_SENT_TO_BROWSER.RELOAD_PAGE
            };
            sendToClient(client, reloadAction);
            client.close();
            return;
        }
    }
    function unsubscribeFromHmrEvents(client, id) {
        const state = clientStates.get(client);
        if (!state) {
            return;
        }
        const subscription = state.subscriptions.get(id);
        subscription == null ? void 0 : subscription.return();
        const key = getEntryKey("assets", "client", id);
        state.clientIssues.delete(key);
    }
    async function handleEntrypointsSubscription() {
        for await (const entrypoints of entrypointsSubscription){
            if (!currentEntriesHandlingResolve) {
                currentEntriesHandling = new Promise(// eslint-disable-next-line no-loop-func
                (resolve)=>currentEntriesHandlingResolve = resolve);
            }
            processTopLevelIssues(currentTopLevelIssues, entrypoints);
            await handleEntrypoints({
                entrypoints,
                currentEntrypoints,
                currentEntryIssues,
                manifestLoader,
                nextConfig: opts.nextConfig,
                rewrites: opts.fsChecker.rewrites,
                logErrors: true,
                dev: {
                    assetMapper,
                    changeSubscriptions,
                    clients,
                    clientStates,
                    serverFields,
                    hooks: {
                        handleWrittenEndpoint: (id, result)=>{
                            clearRequireCache(id, result);
                        },
                        propagateServerField: propagateServerField.bind(null, opts),
                        sendHmr,
                        startBuilding,
                        subscribeToChanges,
                        unsubscribeFromChanges,
                        unsubscribeFromHmrEvents
                    }
                }
            });
            currentEntriesHandlingResolve();
            currentEntriesHandlingResolve = undefined;
        }
    }
    await mkdir(join(distDir, "server"), {
        recursive: true
    });
    await mkdir(join(distDir, "static", buildId), {
        recursive: true
    });
    await writeFile(join(distDir, "package.json"), JSON.stringify({
        type: "commonjs"
    }, null, 2));
    const overlayMiddleware = getOverlayMiddleware(project);
    const versionInfoPromise = getVersionInfo(isTestMode || opts.telemetry.isEnabled);
    const hotReloader = {
        turbopackProject: project,
        activeWebpackConfigs: undefined,
        serverStats: null,
        edgeServerStats: null,
        async run (req, res, _parsedUrl) {
            var _req_url;
            // intercept page chunks request and ensure them with turbopack
            if ((_req_url = req.url) == null ? void 0 : _req_url.startsWith("/_next/static/chunks/pages/")) {
                const params = matchNextPageBundleRequest(req.url);
                if (params) {
                    const decodedPagePath = `/${params.path.map((param)=>decodeURIComponent(param)).join("/")}`;
                    const denormalizedPagePath = denormalizePagePath(decodedPagePath);
                    await hotReloader.ensurePage({
                        page: denormalizedPagePath,
                        clientOnly: false,
                        definition: undefined,
                        url: req.url
                    }).catch(console.error);
                }
            }
            await overlayMiddleware(req, res);
            // Request was not finished.
            return {
                finished: undefined
            };
        },
        // TODO: Figure out if socket type can match the NextJsHotReloaderInterface
        onHMR (req, socket, head) {
            wsServer.handleUpgrade(req, socket, head, (client)=>{
                const clientIssues = new Map();
                const subscriptions = new Map();
                clients.add(client);
                clientStates.set(client, {
                    clientIssues,
                    hmrPayloads: new Map(),
                    turbopackUpdates: [],
                    subscriptions
                });
                client.on("close", ()=>{
                    // Remove active subscriptions
                    for (const subscription of subscriptions.values()){
                        subscription.return == null ? void 0 : subscription.return.call(subscription);
                    }
                    clientStates.delete(client);
                    clients.delete(client);
                });
                client.addEventListener("message", ({ data })=>{
                    const parsedData = JSON.parse(typeof data !== "string" ? data.toString() : data);
                    // Next.js messages
                    switch(parsedData.event){
                        case "ping":
                            break;
                        case "span-end":
                            {
                                hotReloaderSpan.manualTraceChild(parsedData.spanName, msToNs(parsedData.startTime), msToNs(parsedData.endTime), parsedData.attributes);
                                break;
                            }
                        case "client-hmr-latency":
                            hotReloaderSpan.manualTraceChild(parsedData.event, msToNs(parsedData.startTime), msToNs(parsedData.endTime), {
                                updatedModules: parsedData.updatedModules,
                                page: parsedData.page,
                                isPageHidden: parsedData.isPageHidden
                            });
                            break;
                        case "client-error":
                        case "client-warning":
                        case "client-success":
                        case "server-component-reload-page":
                        case "client-reload-page":
                        case "client-removed-page":
                        case "client-full-reload":
                            const { hadRuntimeError, dependencyChain } = parsedData;
                            if (hadRuntimeError) {
                                Log.warn(FAST_REFRESH_RUNTIME_RELOAD);
                            }
                            if (Array.isArray(dependencyChain) && typeof dependencyChain[0] === "string") {
                                const cleanedModulePath = dependencyChain[0].replace(/^\[project\]/, ".").replace(/ \[.*\] \(.*\)$/, "");
                                Log.warn(`Fast Refresh had to perform a full reload when ${cleanedModulePath} changed. Read more: https://nextjs.org/docs/messages/fast-refresh-reload`);
                            }
                            break;
                        case "client-added-page":
                            break;
                        default:
                            // Might be a Turbopack message...
                            if (!parsedData.type) {
                                throw new Error(`unrecognized HMR message "${data}"`);
                            }
                    }
                    // Turbopack messages
                    switch(parsedData.type){
                        case "turbopack-subscribe":
                            subscribeToHmrEvents(client, parsedData.path);
                            break;
                        case "turbopack-unsubscribe":
                            unsubscribeFromHmrEvents(client, parsedData.path);
                            break;
                        default:
                            if (!parsedData.event) {
                                throw new Error(`unrecognized Turbopack HMR message "${data}"`);
                            }
                    }
                });
                const turbopackConnected = {
                    action: HMR_ACTIONS_SENT_TO_BROWSER.TURBOPACK_CONNECTED
                };
                sendToClient(client, turbopackConnected);
                const errors = [];
                for (const entryIssues of currentEntryIssues.values()){
                    for (const issue of entryIssues.values()){
                        if (issue.severity !== "warning") {
                            errors.push({
                                message: formatIssue(issue)
                            });
                        } else {
                            printNonFatalIssue(issue);
                        }
                    }
                }
                (async function() {
                    const versionInfo = await versionInfoPromise;
                    const sync = {
                        action: HMR_ACTIONS_SENT_TO_BROWSER.SYNC,
                        errors,
                        warnings: [],
                        hash: "",
                        versionInfo
                    };
                    sendToClient(client, sync);
                })();
            });
        },
        send (action) {
            const payload = JSON.stringify(action);
            for (const client of clients){
                client.send(payload);
            }
        },
        setHmrServerError (_error) {
        // Not implemented yet.
        },
        clearHmrServerError () {
        // Not implemented yet.
        },
        async start () {},
        async stop () {
        // Not implemented yet.
        },
        async getCompilationErrors (page) {
            const appEntryKey = getEntryKey("app", "server", page);
            const pagesEntryKey = getEntryKey("pages", "server", page);
            const topLevelIssues = currentTopLevelIssues.values();
            const thisEntryIssues = currentEntryIssues.get(appEntryKey) ?? currentEntryIssues.get(pagesEntryKey);
            if (thisEntryIssues !== undefined && thisEntryIssues.size > 0) {
                // If there is an error related to the requesting page we display it instead of the first error
                return [
                    ...topLevelIssues,
                    ...thisEntryIssues.values()
                ].map((issue)=>{
                    const formattedIssue = formatIssue(issue);
                    if (issue.severity === "warning") {
                        printNonFatalIssue(issue);
                        return null;
                    } else if (isWellKnownError(issue)) {
                        Log.error(formattedIssue);
                    }
                    return new Error(formattedIssue);
                }).filter((error)=>error !== null);
            }
            // Otherwise, return all errors across pages
            const errors = [];
            for (const issue of topLevelIssues){
                if (issue.severity !== "warning") {
                    errors.push(new Error(formatIssue(issue)));
                }
            }
            for (const entryIssues of currentEntryIssues.values()){
                for (const issue of entryIssues.values()){
                    if (issue.severity !== "warning") {
                        const message = formatIssue(issue);
                        errors.push(new Error(message));
                    } else {
                        printNonFatalIssue(issue);
                    }
                }
            }
            return errors;
        },
        async invalidate ({ // .env files or tsconfig/jsconfig change
        reloadAfterInvalidation }) {
            if (reloadAfterInvalidation) {
                await clearAllModuleContexts();
                this.send({
                    action: HMR_ACTIONS_SENT_TO_BROWSER.SERVER_COMPONENT_CHANGES
                });
            }
        },
        async buildFallbackError () {
        // Not implemented yet.
        },
        async ensurePage ({ page: inputPage, // Unused parameters
        // clientOnly,
        // appPaths,
        definition, isApp, url: requestUrl }) {
            if (BLOCKED_PAGES.includes(inputPage) && inputPage !== "/_error") {
                return;
            }
            let routeDef = definition ?? await findPagePathData(dir, inputPage, nextConfig.pageExtensions, opts.pagesDir, opts.appDir);
            const page = routeDef.page;
            const pathname = (definition == null ? void 0 : definition.pathname) ?? inputPage;
            if (page === "/_error") {
                let finishBuilding = startBuilding(pathname, requestUrl, false);
                try {
                    await handlePagesErrorRoute({
                        currentEntryIssues,
                        entrypoints: currentEntrypoints,
                        manifestLoader,
                        rewrites: opts.fsChecker.rewrites,
                        logErrors: true,
                        hooks: {
                            subscribeToChanges,
                            handleWrittenEndpoint: (id, result)=>{
                                clearRequireCache(id, result);
                                assetMapper.setPathsForKey(id, result.clientPaths);
                            }
                        }
                    });
                } finally{
                    finishBuilding();
                }
                return;
            }
            await currentEntriesHandling;
            const isInsideAppDir = routeDef.bundlePath.startsWith("app/");
            const route = isInsideAppDir ? currentEntrypoints.app.get(page) : currentEntrypoints.page.get(page);
            if (!route) {
                // TODO: why is this entry missing in turbopack?
                if (page === "/middleware") return;
                if (page === "/src/middleware") return;
                if (page === "/instrumentation") return;
                if (page === "/src/instrumentation") return;
                throw new PageNotFoundError(`route not found ${page}`);
            }
            // We don't throw on ensureOpts.isApp === true for page-api
            // since this can happen when app pages make
            // api requests to page API routes.
            if (isApp && route.type === "page") {
                throw new Error(`mis-matched route type: isApp && page for ${page}`);
            }
            const finishBuilding = startBuilding(pathname, requestUrl, false);
            try {
                await handleRouteType({
                    dev: true,
                    page,
                    pathname,
                    route,
                    currentEntryIssues,
                    entrypoints: currentEntrypoints,
                    manifestLoader,
                    readyIds,
                    rewrites: opts.fsChecker.rewrites,
                    logErrors: true,
                    hooks: {
                        subscribeToChanges,
                        handleWrittenEndpoint: (id, result)=>{
                            clearRequireCache(id, result);
                            assetMapper.setPathsForKey(id, result.clientPaths);
                        }
                    }
                });
            } finally{
                finishBuilding();
            }
        }
    };
    handleEntrypointsSubscription().catch((err)=>{
        console.error(err);
        process.exit(1);
    });
    // Write empty manifests
    await currentEntriesHandling;
    await manifestLoader.writeManifests({
        rewrites: opts.fsChecker.rewrites,
        pageEntrypoints: currentEntrypoints.page
    });
    async function handleProjectUpdates() {
        for await (const updateMessage of project.updateInfoSubscribe(30)){
            switch(updateMessage.updateType){
                case "start":
                    {
                        hotReloader.send({
                            action: HMR_ACTIONS_SENT_TO_BROWSER.BUILDING
                        });
                        break;
                    }
                case "end":
                    {
                        sendEnqueuedMessages();
                        function addErrors(errorsMap, issues) {
                            for (const issueMap of issues.values()){
                                for (const [key, issue] of issueMap){
                                    if (issue.severity === "warning") continue;
                                    if (errorsMap.has(key)) continue;
                                    const message = formatIssue(issue);
                                    errorsMap.set(key, {
                                        message,
                                        details: issue.detail ? renderStyledStringToErrorAnsi(issue.detail) : undefined
                                    });
                                }
                            }
                        }
                        const errors = new Map();
                        addErrors(errors, currentEntryIssues);
                        for (const client of clients){
                            const state = clientStates.get(client);
                            if (!state) {
                                continue;
                            }
                            const clientErrors = new Map(errors);
                            addErrors(clientErrors, state.clientIssues);
                            sendToClient(client, {
                                action: HMR_ACTIONS_SENT_TO_BROWSER.BUILT,
                                hash: String(++hmrHash),
                                errors: [
                                    ...clientErrors.values()
                                ],
                                warnings: []
                            });
                        }
                        if (hmrEventHappened) {
                            const time = updateMessage.value.duration;
                            const timeMessage = time > 2000 ? `${Math.round(time / 100) / 10}s` : `${time}ms`;
                            Log.event(`Compiled in ${timeMessage}`);
                            hmrEventHappened = false;
                        }
                        break;
                    }
                default:
            }
        }
    }
    handleProjectUpdates().catch((err)=>{
        console.error(err);
        process.exit(1);
    });
    return hotReloader;
}

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