import { AsyncLocalStorage } from 'async_hooks';
import { COMPILER_NAMES, EDGE_UNSUPPORTED_NODE_APIS } from '../../../shared/lib/constants';
import { EdgeRuntime } from 'next/dist/compiled/edge-runtime';
import { readFileSync, promises as fs } from 'fs';
import { validateURL } from '../utils';
import { pick } from '../../../lib/pick';
import { fetchInlineAsset } from './fetch-inline-assets';
import { runInContext } from 'vm';
import BufferImplementation from 'node:buffer';
import EventsImplementation from 'node:events';
import AssertImplementation from 'node:assert';
import UtilImplementation from 'node:util';
import AsyncHooksImplementation from 'node:async_hooks';
import { intervalsManager, timeoutsManager } from './resource-managers';
import { createLocalRequestContext } from '../../after/builtin-request-context';
import { patchErrorInspectEdgeLite } from '../../patch-error-inspect';
let getServerError;
let decorateServerError;
if (process.env.NODE_ENV === 'development') {
    const middleware = require('../../../client/components/react-dev-overlay/server/middleware-webpack');
    getServerError = middleware.getServerError;
    decorateServerError = require('../../../shared/lib/error-source').decorateServerError;
} else {
    getServerError = (error, _)=>error;
    decorateServerError = (_, __)=>{};
}
/**
 * A Map of cached module contexts indexed by the module name. It allows
 * to have a different cache scoped per module name or depending on the
 * provided module key on creation.
 */ const moduleContexts = new Map();
const pendingModuleCaches = new Map();
/**
 * Same as clearModuleContext but for all module contexts.
 */ export async function clearAllModuleContexts() {
    intervalsManager.removeAll();
    timeoutsManager.removeAll();
    moduleContexts.clear();
    pendingModuleCaches.clear();
}
/**
 * For a given path a context, this function checks if there is any module
 * context that contains the path with an older content and, if that's the
 * case, removes the context from the cache.
 *
 * This function also clears all intervals and timeouts created by the
 * module context.
 */ export async function clearModuleContext(path) {
    intervalsManager.removeAll();
    timeoutsManager.removeAll();
    const handleContext = (key, cache, context)=>{
        if (cache == null ? void 0 : cache.paths.has(path)) {
            context.delete(key);
        }
    };
    for (const [key, cache] of moduleContexts){
        handleContext(key, cache, moduleContexts);
    }
    for (const [key, cache] of pendingModuleCaches){
        handleContext(key, await cache, pendingModuleCaches);
    }
}
async function loadWasm(wasm) {
    const modules = {};
    await Promise.all(wasm.map(async (binding)=>{
        const module = await WebAssembly.compile(await fs.readFile(binding.filePath));
        modules[binding.name] = module;
    }));
    return modules;
}
function buildEnvironmentVariablesFrom(injectedEnvironments) {
    const pairs = Object.keys(process.env).map((key)=>[
            key,
            process.env[key]
        ]);
    const env = Object.fromEntries(pairs);
    for (const key of Object.keys(injectedEnvironments)){
        env[key] = injectedEnvironments[key];
    }
    env.NEXT_RUNTIME = 'edge';
    return env;
}
function throwUnsupportedAPIError(name) {
    const error = new Error(`A Node.js API is used (${name}) which is not supported in the Edge Runtime.
Learn more: https://nextjs.org/docs/api-reference/edge-runtime`);
    decorateServerError(error, COMPILER_NAMES.edgeServer);
    throw error;
}
function createProcessPolyfill(env) {
    const processPolyfill = {
        env: buildEnvironmentVariablesFrom(env)
    };
    const overriddenValue = {};
    for (const key of Object.keys(process)){
        if (key === 'env') continue;
        Object.defineProperty(processPolyfill, key, {
            get () {
                if (overriddenValue[key] !== undefined) {
                    return overriddenValue[key];
                }
                if (typeof process[key] === 'function') {
                    return ()=>throwUnsupportedAPIError(`process.${key}`);
                }
                return undefined;
            },
            set (value) {
                overriddenValue[key] = value;
            },
            enumerable: false
        });
    }
    return processPolyfill;
}
function addStub(context, name) {
    Object.defineProperty(context, name, {
        get () {
            return function() {
                throwUnsupportedAPIError(name);
            };
        },
        enumerable: false
    });
}
function getDecorateUnhandledError(runtime) {
    const EdgeRuntimeError = runtime.evaluate(`Error`);
    return (error)=>{
        if (error instanceof EdgeRuntimeError) {
            decorateServerError(error, COMPILER_NAMES.edgeServer);
        }
    };
}
function getDecorateUnhandledRejection(runtime) {
    const EdgeRuntimeError = runtime.evaluate(`Error`);
    return (rejected)=>{
        if (rejected.reason instanceof EdgeRuntimeError) {
            decorateServerError(rejected.reason, COMPILER_NAMES.edgeServer);
        }
    };
}
const NativeModuleMap = (()=>{
    const mods = {
        'node:buffer': pick(BufferImplementation, [
            'constants',
            'kMaxLength',
            'kStringMaxLength',
            'Buffer',
            'SlowBuffer'
        ]),
        'node:events': pick(EventsImplementation, [
            'EventEmitter',
            'captureRejectionSymbol',
            'defaultMaxListeners',
            'errorMonitor',
            'listenerCount',
            'on',
            'once'
        ]),
        'node:async_hooks': pick(AsyncHooksImplementation, [
            'AsyncLocalStorage',
            'AsyncResource'
        ]),
        'node:assert': pick(AssertImplementation, [
            'AssertionError',
            'deepEqual',
            'deepStrictEqual',
            'doesNotMatch',
            'doesNotReject',
            'doesNotThrow',
            'equal',
            'fail',
            'ifError',
            'match',
            'notDeepEqual',
            'notDeepStrictEqual',
            'notEqual',
            'notStrictEqual',
            'ok',
            'rejects',
            'strict',
            'strictEqual',
            'throws'
        ]),
        'node:util': pick(UtilImplementation, [
            '_extend',
            'callbackify',
            'format',
            'inherits',
            'promisify',
            'types'
        ])
    };
    return new Map(Object.entries(mods));
})();
export const requestStore = new AsyncLocalStorage();
export const edgeSandboxNextRequestContext = createLocalRequestContext();
/**
 * Create a module cache specific for the provided parameters. It includes
 * a runtime context, require cache and paths cache.
 */ async function createModuleContext(options) {
    const warnedEvals = new Set();
    const warnedWasmCodegens = new Set();
    const { edgeFunctionEntry } = options;
    const wasm = await loadWasm(edgeFunctionEntry.wasm ?? []);
    const runtime = new EdgeRuntime({
        codeGeneration: process.env.NODE_ENV !== 'production' ? {
            strings: true,
            wasm: true
        } : undefined,
        extend: (context)=>{
            context.process = createProcessPolyfill(edgeFunctionEntry.env);
            Object.defineProperty(context, 'require', {
                enumerable: false,
                value: (id)=>{
                    const value = NativeModuleMap.get(id);
                    if (!value) {
                        throw TypeError('Native module not found: ' + id);
                    }
                    return value;
                }
            });
            if (process.env.NODE_ENV !== 'production') {
                context.__next_log_error__ = function(err) {
                    options.onError(err);
                };
            }
            context.__next_eval__ = function __next_eval__(fn) {
                const key = fn.toString();
                if (!warnedEvals.has(key)) {
                    const warning = getServerError(new Error(`Dynamic Code Evaluation (e. g. 'eval', 'new Function') not allowed in Edge Runtime
Learn More: https://nextjs.org/docs/messages/edge-dynamic-code-evaluation`), COMPILER_NAMES.edgeServer);
                    warning.name = 'DynamicCodeEvaluationWarning';
                    Error.captureStackTrace(warning, __next_eval__);
                    warnedEvals.add(key);
                    options.onWarning(warning);
                }
                return fn();
            };
            context.__next_webassembly_compile__ = function __next_webassembly_compile__(fn) {
                const key = fn.toString();
                if (!warnedWasmCodegens.has(key)) {
                    const warning = getServerError(new Error(`Dynamic WASM code generation (e. g. 'WebAssembly.compile') not allowed in Edge Runtime.
Learn More: https://nextjs.org/docs/messages/edge-dynamic-code-evaluation`), COMPILER_NAMES.edgeServer);
                    warning.name = 'DynamicWasmCodeGenerationWarning';
                    Error.captureStackTrace(warning, __next_webassembly_compile__);
                    warnedWasmCodegens.add(key);
                    options.onWarning(warning);
                }
                return fn();
            };
            context.__next_webassembly_instantiate__ = async function __next_webassembly_instantiate__(fn) {
                const result = await fn();
                // If a buffer is given, WebAssembly.instantiate returns an object
                // containing both a module and an instance while it returns only an
                // instance if a WASM module is given. Utilize the fact to determine
                // if the WASM code generation happens.
                //
                // https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/instantiate#primary_overload_%E2%80%94_taking_wasm_binary_code
                const instantiatedFromBuffer = result.hasOwnProperty('module');
                const key = fn.toString();
                if (instantiatedFromBuffer && !warnedWasmCodegens.has(key)) {
                    const warning = getServerError(new Error(`Dynamic WASM code generation ('WebAssembly.instantiate' with a buffer parameter) not allowed in Edge Runtime.
Learn More: https://nextjs.org/docs/messages/edge-dynamic-code-evaluation`), COMPILER_NAMES.edgeServer);
                    warning.name = 'DynamicWasmCodeGenerationWarning';
                    Error.captureStackTrace(warning, __next_webassembly_instantiate__);
                    warnedWasmCodegens.add(key);
                    options.onWarning(warning);
                }
                return result;
            };
            const __fetch = context.fetch;
            context.fetch = async (input, init = {})=>{
                var _init_headers_get;
                const callingError = new Error('[internal]');
                const assetResponse = await fetchInlineAsset({
                    input,
                    assets: options.edgeFunctionEntry.assets,
                    distDir: options.distDir,
                    context
                });
                if (assetResponse) {
                    return assetResponse;
                }
                init.headers = new Headers(init.headers ?? {});
                // Forward subrequest header from incoming request to outgoing request
                const store = requestStore.getStore();
                if ((store == null ? void 0 : store.headers.has('x-middleware-subrequest')) && !init.headers.has('x-middleware-subrequest')) {
                    init.headers.set('x-middleware-subrequest', store.headers.get('x-middleware-subrequest') ?? '');
                }
                const prevs = ((_init_headers_get = init.headers.get(`x-middleware-subrequest`)) == null ? void 0 : _init_headers_get.split(':')) || [];
                const value = prevs.concat(options.moduleName).join(':');
                init.headers.set('x-middleware-subrequest', value);
                if (!init.headers.has('user-agent')) {
                    init.headers.set(`user-agent`, `Next.js Middleware`);
                }
                const response = typeof input === 'object' && 'url' in input ? __fetch(input.url, {
                    ...pick(input, [
                        'method',
                        'body',
                        'cache',
                        'credentials',
                        'integrity',
                        'keepalive',
                        'mode',
                        'redirect',
                        'referrer',
                        'referrerPolicy',
                        'signal'
                    ]),
                    ...init,
                    headers: {
                        ...Object.fromEntries(input.headers),
                        ...Object.fromEntries(init.headers)
                    }
                }) : __fetch(String(input), init);
                return await response.catch((err)=>{
                    callingError.message = err.message;
                    err.stack = callingError.stack;
                    throw err;
                });
            };
            const __Request = context.Request;
            context.Request = class extends __Request {
                constructor(input, init){
                    const url = typeof input !== 'string' && 'url' in input ? input.url : String(input);
                    validateURL(url);
                    super(url, init);
                    this.next = init == null ? void 0 : init.next;
                }
            };
            const __redirect = context.Response.redirect.bind(context.Response);
            context.Response.redirect = (...args)=>{
                validateURL(args[0]);
                return __redirect(...args);
            };
            for (const name of EDGE_UNSUPPORTED_NODE_APIS){
                addStub(context, name);
            }
            Object.assign(context, wasm);
            context.performance = performance;
            context.AsyncLocalStorage = AsyncLocalStorage;
            // @ts-ignore the timeouts have weird types in the edge runtime
            context.setInterval = (...args)=>intervalsManager.add(args);
            // @ts-ignore the timeouts have weird types in the edge runtime
            context.clearInterval = (interval)=>intervalsManager.remove(interval);
            // @ts-ignore the timeouts have weird types in the edge runtime
            context.setTimeout = (...args)=>timeoutsManager.add(args);
            // @ts-ignore the timeouts have weird types in the edge runtime
            context.clearTimeout = (timeout)=>timeoutsManager.remove(timeout);
            // Duplicated from packages/next/src/server/after/builtin-request-context.ts
            // because we need to use the sandboxed `Symbol.for`, not the one from the outside
            const NEXT_REQUEST_CONTEXT_SYMBOL = context.Symbol.for('@next/request-context');
            Object.defineProperty(context, NEXT_REQUEST_CONTEXT_SYMBOL, {
                enumerable: false,
                value: edgeSandboxNextRequestContext
            });
            return context;
        }
    });
    const decorateUnhandledError = getDecorateUnhandledError(runtime);
    runtime.context.addEventListener('error', decorateUnhandledError);
    const decorateUnhandledRejection = getDecorateUnhandledRejection(runtime);
    runtime.context.addEventListener('unhandledrejection', decorateUnhandledRejection);
    patchErrorInspectEdgeLite(runtime.context.Error);
    return {
        runtime,
        paths: new Map(),
        warnedEvals: new Set()
    };
}
function getModuleContextShared(options) {
    let deferredModuleContext = pendingModuleCaches.get(options.moduleName);
    if (!deferredModuleContext) {
        deferredModuleContext = createModuleContext(options);
        pendingModuleCaches.set(options.moduleName, deferredModuleContext);
    }
    return deferredModuleContext;
}
/**
 * For a given module name this function will get a cached module
 * context or create it. It will return the module context along
 * with a function that allows to run some code from a given
 * filepath within the context.
 */ export async function getModuleContext(options) {
    let lazyModuleContext;
    if (options.useCache) {
        lazyModuleContext = moduleContexts.get(options.moduleName) || await getModuleContextShared(options);
    }
    if (!lazyModuleContext) {
        lazyModuleContext = await createModuleContext(options);
        moduleContexts.set(options.moduleName, lazyModuleContext);
    }
    const moduleContext = lazyModuleContext;
    const evaluateInContext = (filepath)=>{
        if (!moduleContext.paths.has(filepath)) {
            const content = readFileSync(filepath, 'utf-8');
            try {
                runInContext(content, moduleContext.runtime.context, {
                    filename: filepath
                });
                moduleContext.paths.set(filepath, content);
            } catch (error) {
                if (options.useCache) {
                    moduleContext == null ? void 0 : moduleContext.paths.delete(filepath);
                }
                throw error;
            }
        }
    };
    return {
        ...moduleContext,
        evaluateInContext
    };
}

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