import { performance } from 'node:perf_hooks';
import { existsSync, promises } from 'node:fs';
import assert from 'node:assert';
import { join, extname, dirname, resolve, relative, normalize } from 'pathe';
import createDebug from 'debug';
import { isNodeBuiltin, slash, findNearestPackageData, toArray, withTrailingSlash, normalizeModuleId, toFilePath } from './utils.mjs';
import { KNOWN_ASSET_TYPES } from './constants.mjs';
import c from 'picocolors';
import { withInlineSourcemap } from './source-map.mjs';
import 'node:url';
import 'node:module';
import 'node:path';

const BUILTIN_EXTENSIONS = /* @__PURE__ */ new Set([".mjs", ".cjs", ".node", ".wasm"]);
const ESM_SYNTAX_RE = /([\s;]|^)(import[\s\w*,{}]*from|import\s*["'*{]|export\b\s*(?:[*{]|default|class|type|function|const|var|let|async function)|import\.meta\b)/m;
const ESM_EXT_RE = /\.(es|esm|esm-browser|esm-bundler|es6|module)\.js$/;
const ESM_FOLDER_RE = /\/(es|esm)\/(.*\.js)$/;
const defaultInline = [
  /virtual:/,
  /\.[mc]?ts$/,
  // special Vite query strings
  /[?&](init|raw|url|inline)\b/,
  // Vite returns a string for assets imports, even if it's inside "node_modules"
  new RegExp(`\\.(${KNOWN_ASSET_TYPES.join("|")})$`)
];
const depsExternal = [
  /\/node_modules\/.*\.cjs\.js$/,
  /\/node_modules\/.*\.mjs$/
];
function guessCJSversion(id) {
  if (id.match(ESM_EXT_RE)) {
    for (const i of [
      id.replace(ESM_EXT_RE, ".mjs"),
      id.replace(ESM_EXT_RE, ".umd.js"),
      id.replace(ESM_EXT_RE, ".cjs.js"),
      id.replace(ESM_EXT_RE, ".js")
    ]) {
      if (existsSync(i))
        return i;
    }
  }
  if (id.match(ESM_FOLDER_RE)) {
    for (const i of [
      id.replace(ESM_FOLDER_RE, "/umd/$1"),
      id.replace(ESM_FOLDER_RE, "/cjs/$1"),
      id.replace(ESM_FOLDER_RE, "/lib/$1"),
      id.replace(ESM_FOLDER_RE, "/$1")
    ]) {
      if (existsSync(i))
        return i;
    }
  }
}
async function isValidNodeImport(id) {
  const extension = extname(id);
  if (BUILTIN_EXTENSIONS.has(extension))
    return true;
  if (extension !== ".js")
    return false;
  if (/\.(\w+-)?esm?(-\w+)?\.js$|\/(esm?)\//.test(id))
    return false;
  id = id.replace("file:///", "");
  const package_ = await findNearestPackageData(dirname(id));
  if (package_.type === "module")
    return true;
  const code = await promises.readFile(id, "utf8").catch(() => "");
  return !ESM_SYNTAX_RE.test(code);
}
const _defaultExternalizeCache = /* @__PURE__ */ new Map();
async function shouldExternalize(id, options, cache = _defaultExternalizeCache) {
  if (!cache.has(id))
    cache.set(id, _shouldExternalize(id, options));
  return cache.get(id);
}
async function _shouldExternalize(id, options) {
  if (isNodeBuiltin(id))
    return id;
  if (id.startsWith("data:") || /^(https?:)?\/\//.test(id))
    return id;
  id = patchWindowsImportPath(id);
  if ((options == null ? void 0 : options.cacheDir) && id.includes(options.cacheDir))
    return id;
  const moduleDirectories = (options == null ? void 0 : options.moduleDirectories) || ["/node_modules/"];
  if (matchExternalizePattern(id, moduleDirectories, options == null ? void 0 : options.inline))
    return false;
  if (matchExternalizePattern(id, moduleDirectories, options == null ? void 0 : options.external))
    return id;
  const isLibraryModule = moduleDirectories.some((dir) => id.includes(dir));
  const guessCJS = isLibraryModule && (options == null ? void 0 : options.fallbackCJS);
  id = guessCJS ? guessCJSversion(id) || id : id;
  if (matchExternalizePattern(id, moduleDirectories, defaultInline))
    return false;
  if (matchExternalizePattern(id, moduleDirectories, depsExternal))
    return id;
  if (isLibraryModule && await isValidNodeImport(id))
    return id;
  return false;
}
function matchExternalizePattern(id, moduleDirectories, patterns) {
  if (patterns == null)
    return false;
  if (patterns === true)
    return true;
  for (const ex of patterns) {
    if (typeof ex === "string") {
      if (moduleDirectories.some((dir) => id.includes(join(dir, ex))))
        return true;
    } else {
      if (ex.test(id))
        return true;
    }
  }
  return false;
}
function patchWindowsImportPath(path) {
  if (path.match(/^\w:\\/))
    return `file:///${slash(path)}`;
  else if (path.match(/^\w:\//))
    return `file:///${path}`;
  else
    return path;
}

function hashCode(s) {
  return s.split("").reduce((a, b) => {
    a = (a << 5) - a + b.charCodeAt(0);
    return a & a;
  }, 0);
}
class Debugger {
  constructor(root, options) {
    this.options = options;
    if (options.dumpModules)
      this.dumpDir = resolve(root, options.dumpModules === true ? ".vite-node/dump" : options.dumpModules);
    if (this.dumpDir) {
      if (options.loadDumppedModules)
        console.info(c.gray(`[vite-node] [debug] load modules from ${this.dumpDir}`));
      else
        console.info(c.gray(`[vite-node] [debug] dump modules to ${this.dumpDir}`));
    }
    this.initPromise = this.clearDump();
  }
  dumpDir;
  initPromise;
  externalizeMap = /* @__PURE__ */ new Map();
  async clearDump() {
    if (!this.dumpDir)
      return;
    if (!this.options.loadDumppedModules && existsSync(this.dumpDir))
      await promises.rm(this.dumpDir, { recursive: true, force: true });
    await promises.mkdir(this.dumpDir, { recursive: true });
  }
  encodeId(id) {
    return `${id.replace(/[^\w@_-]/g, "_").replace(/_+/g, "_")}-${hashCode(id)}.js`;
  }
  async recordExternalize(id, path) {
    if (!this.dumpDir)
      return;
    this.externalizeMap.set(id, path);
    await this.writeInfo();
  }
  async dumpFile(id, result) {
    if (!result || !this.dumpDir)
      return;
    await this.initPromise;
    const name = this.encodeId(id);
    return await promises.writeFile(join(this.dumpDir, name), `// ${id.replace(/\0/g, "\\0")}
${result.code}`, "utf-8");
  }
  async loadDump(id) {
    if (!this.dumpDir)
      return null;
    await this.initPromise;
    const name = this.encodeId(id);
    const path = join(this.dumpDir, name);
    if (!existsSync(path))
      return null;
    const code = await promises.readFile(path, "utf-8");
    return {
      code: code.replace(/^\/\/.*?\n/, ""),
      map: void 0
    };
  }
  async writeInfo() {
    if (!this.dumpDir)
      return;
    const info = JSON.stringify({
      time: (/* @__PURE__ */ new Date()).toLocaleString(),
      externalize: Object.fromEntries(this.externalizeMap.entries())
    }, null, 2);
    return promises.writeFile(join(this.dumpDir, "info.json"), info, "utf-8");
  }
}

const debugRequest = createDebug("vite-node:server:request");
class ViteNodeServer {
  constructor(server, options = {}) {
    this.server = server;
    this.options = options;
    var _a, _b, _c;
    const ssrOptions = server.config.ssr;
    options.deps ?? (options.deps = {});
    options.deps.cacheDir = relative(server.config.root, options.deps.cacheDir || server.config.cacheDir);
    if (ssrOptions) {
      if (ssrOptions.noExternal === true) {
        (_a = options.deps).inline ?? (_a.inline = true);
      } else if (options.deps.inline !== true) {
        (_b = options.deps).inline ?? (_b.inline = []);
        const inline = options.deps.inline;
        options.deps.inline.push(...toArray(ssrOptions.noExternal).filter((dep) => !inline.includes(dep)));
      }
    }
    if (process.env.VITE_NODE_DEBUG_DUMP) {
      options.debug = Object.assign({
        dumpModules: !!process.env.VITE_NODE_DEBUG_DUMP,
        loadDumppedModules: process.env.VITE_NODE_DEBUG_DUMP === "load"
      }, options.debug ?? {});
    }
    if (options.debug)
      this.debugger = new Debugger(server.config.root, options.debug);
    (_c = options.deps).moduleDirectories ?? (_c.moduleDirectories = []);
    const envValue = process.env.VITE_NODE_DEPS_MODULE_DIRECTORIES || process.env.npm_config_VITE_NODE_DEPS_MODULE_DIRECTORIES;
    const customModuleDirectories = envValue == null ? void 0 : envValue.split(",");
    if (customModuleDirectories)
      options.deps.moduleDirectories.push(...customModuleDirectories);
    options.deps.moduleDirectories = options.deps.moduleDirectories.map((dir) => {
      if (!dir.startsWith("/"))
        dir = `/${dir}`;
      if (!dir.endsWith("/"))
        dir += "/";
      return normalize(dir);
    });
    if (!options.deps.moduleDirectories.includes("/node_modules/"))
      options.deps.moduleDirectories.push("/node_modules/");
  }
  fetchPromiseMap = {
    ssr: /* @__PURE__ */ new Map(),
    web: /* @__PURE__ */ new Map()
  };
  transformPromiseMap = {
    ssr: /* @__PURE__ */ new Map(),
    web: /* @__PURE__ */ new Map()
  };
  existingOptimizedDeps = /* @__PURE__ */ new Set();
  fetchCaches = {
    ssr: /* @__PURE__ */ new Map(),
    web: /* @__PURE__ */ new Map()
  };
  fetchCache = /* @__PURE__ */ new Map();
  externalizeCache = /* @__PURE__ */ new Map();
  debugger;
  shouldExternalize(id) {
    return shouldExternalize(id, this.options.deps, this.externalizeCache);
  }
  async ensureExists(id) {
    if (this.existingOptimizedDeps.has(id))
      return true;
    if (existsSync(id)) {
      this.existingOptimizedDeps.add(id);
      return true;
    }
    return new Promise((resolve2) => {
      setTimeout(() => {
        this.ensureExists(id).then(() => {
          resolve2(true);
        });
      });
    });
  }
  async resolveId(id, importer, transformMode) {
    if (importer && !importer.startsWith(withTrailingSlash(this.server.config.root)))
      importer = resolve(this.server.config.root, importer);
    const mode = transformMode ?? (importer && this.getTransformMode(importer) || "ssr");
    return this.server.pluginContainer.resolveId(id, importer, { ssr: mode === "ssr" });
  }
  getSourceMap(source) {
    var _a, _b;
    const fetchResult = (_a = this.fetchCache.get(source)) == null ? void 0 : _a.result;
    if (fetchResult == null ? void 0 : fetchResult.map)
      return fetchResult.map;
    const ssrTransformResult = (_b = this.server.moduleGraph.getModuleById(source)) == null ? void 0 : _b.ssrTransformResult;
    return (ssrTransformResult == null ? void 0 : ssrTransformResult.map) || null;
  }
  assertMode(mode) {
    assert(mode === "web" || mode === "ssr", `"transformMode" can only be "web" or "ssr", received "${mode}".`);
  }
  async fetchModule(id, transformMode) {
    const moduleId = normalizeModuleId(id);
    const mode = transformMode || this.getTransformMode(id);
    this.assertMode(mode);
    const promiseMap = this.fetchPromiseMap[mode];
    if (!promiseMap.has(moduleId)) {
      promiseMap.set(moduleId, this._fetchModule(moduleId, mode).then((r) => {
        return this.options.sourcemap !== true ? { ...r, map: void 0 } : r;
      }).finally(() => {
        promiseMap.delete(moduleId);
      }));
    }
    return promiseMap.get(moduleId);
  }
  async transformRequest(id, filepath = id, transformMode) {
    const mode = transformMode || this.getTransformMode(id);
    this.assertMode(mode);
    const promiseMap = this.transformPromiseMap[mode];
    if (!promiseMap.has(id)) {
      promiseMap.set(id, this._transformRequest(id, filepath, mode).finally(() => {
        promiseMap.delete(id);
      }));
    }
    return promiseMap.get(id);
  }
  async transformModule(id, transformMode) {
    if (transformMode !== "web")
      throw new Error('`transformModule` only supports `transformMode: "web"`.');
    const normalizedId = normalizeModuleId(id);
    const mod = this.server.moduleGraph.getModuleById(normalizedId);
    const result = (mod == null ? void 0 : mod.transformResult) || await this.server.transformRequest(normalizedId);
    return {
      code: result == null ? void 0 : result.code
    };
  }
  getTransformMode(id) {
    var _a, _b, _c, _d;
    const withoutQuery = id.split("?")[0];
    if ((_b = (_a = this.options.transformMode) == null ? void 0 : _a.web) == null ? void 0 : _b.some((r) => withoutQuery.match(r)))
      return "web";
    if ((_d = (_c = this.options.transformMode) == null ? void 0 : _c.ssr) == null ? void 0 : _d.some((r) => withoutQuery.match(r)))
      return "ssr";
    if (withoutQuery.match(/\.([cm]?[jt]sx?|json)$/))
      return "ssr";
    return "web";
  }
  getChangedModule(id, file) {
    const module = this.server.moduleGraph.getModuleById(id) || this.server.moduleGraph.getModuleById(file);
    if (module)
      return module;
    const _modules = this.server.moduleGraph.getModulesByFile(file);
    if (!_modules || !_modules.size)
      return null;
    const modules = [..._modules];
    let mod = modules[0];
    let latestMax = -1;
    for (const m of _modules) {
      const timestamp = Math.max(m.lastHMRTimestamp, m.lastInvalidationTimestamp);
      if (timestamp > latestMax) {
        latestMax = timestamp;
        mod = m;
      }
    }
    return mod;
  }
  async _fetchModule(id, transformMode) {
    var _a, _b;
    let result;
    const cacheDir = (_a = this.options.deps) == null ? void 0 : _a.cacheDir;
    if (cacheDir && id.includes(cacheDir)) {
      if (!id.startsWith(withTrailingSlash(this.server.config.root)))
        id = join(this.server.config.root, id);
      const timeout = setTimeout(() => {
        throw new Error(`ViteNodeServer: ${id} not found. This is a bug, please report it.`);
      }, 5e3);
      await this.ensureExists(id);
      clearTimeout(timeout);
    }
    const { path: filePath } = toFilePath(id, this.server.config.root);
    const moduleNode = this.getChangedModule(id, filePath);
    const cache = this.fetchCaches[transformMode].get(filePath);
    const timestamp = moduleNode ? Math.max(moduleNode.lastHMRTimestamp, moduleNode.lastInvalidationTimestamp) : 0;
    if (cache && (timestamp === 0 || cache.timestamp >= timestamp))
      return cache.result;
    const time = Date.now();
    const externalize = await this.shouldExternalize(filePath);
    let duration;
    if (externalize) {
      result = { externalize };
      (_b = this.debugger) == null ? void 0 : _b.recordExternalize(id, externalize);
    } else {
      const start = performance.now();
      const r = await this._transformRequest(id, filePath, transformMode);
      duration = performance.now() - start;
      result = { code: r == null ? void 0 : r.code, map: r == null ? void 0 : r.map };
    }
    const cacheEntry = {
      duration,
      timestamp: time,
      result
    };
    this.fetchCaches[transformMode].set(filePath, cacheEntry);
    this.fetchCache.set(filePath, cacheEntry);
    return result;
  }
  async processTransformResult(filepath, result) {
    const mod = this.server.moduleGraph.getModuleById(filepath);
    return withInlineSourcemap(result, {
      filepath: (mod == null ? void 0 : mod.file) || filepath,
      root: this.server.config.root
    });
  }
  async _transformRequest(id, filepath, transformMode) {
    var _a, _b, _c, _d;
    debugRequest(id);
    let result = null;
    if ((_a = this.options.debug) == null ? void 0 : _a.loadDumppedModules) {
      result = await ((_b = this.debugger) == null ? void 0 : _b.loadDump(id)) ?? null;
      if (result)
        return result;
    }
    if (transformMode === "web") {
      result = await this.server.transformRequest(id);
      if (result)
        result = await this.server.ssrTransform(result.code, result.map, id);
    } else {
      result = await this.server.transformRequest(id, { ssr: true });
    }
    const sourcemap = this.options.sourcemap ?? "inline";
    if (sourcemap === "inline" && result && !id.includes("node_modules"))
      result = await this.processTransformResult(filepath, result);
    if ((_c = this.options.debug) == null ? void 0 : _c.dumpModules)
      await ((_d = this.debugger) == null ? void 0 : _d.dumpFile(id, result));
    return result;
  }
}

export { ViteNodeServer, guessCJSversion, shouldExternalize };