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import type { ReactElement } from "react";import { ULTRA_COMPILER_PATH } from "./constants.ts";import {  fromFileUrl,  Hono,  logger,  relative,  resolve,  sprintf,} from "./deps.ts";import { log } from "./logger.ts";import { renderToStream } from "./render.ts";import { Context, Env, ImportMap, Mode } from "./types.ts";import { toUltraUrl } from "./utils/url.ts";
type UltraServerRenderOptions = {  entrypoint?: string;  generateStaticHTML?: boolean;  enableEsModuleShims?: boolean;  disableHydration?: boolean;  flushEffectsToHead?: boolean;};
type UltraServerOptions = {  mode: Mode;  importMapPath?: string;  assetManifestPath: string;  enableEsModuleShims?: boolean;  esModuleShimsPath?: string;  entrypoint?: string;};
export class UltraServer<  E extends Env = Env,  // deno-lint-ignore ban-types  S = {},  BasePath extends string = "/",> extends Hono<E, S, BasePath> {  public importMap: ImportMap | undefined;  public assetManifest: Map<string, string> | undefined;
  public mode: Mode;  public baseUrl: string;  public importMapPath?: string;  public assetManifestPath: string;  public enableEsModuleShims?: boolean;  public esModuleShimsPath?: string;  public entrypoint?: string;  public ultraDir?: string;
  constructor(    public root: string,    options: UltraServerOptions,  ) {    super();
    this.mode = options.mode;    this.importMapPath = options.importMapPath;    this.assetManifestPath = options.assetManifestPath;    this.enableEsModuleShims = options.enableEsModuleShims;    this.esModuleShimsPath = options.esModuleShimsPath;    this.entrypoint = options.entrypoint;    this.baseUrl = this.mode === "development"      ? `${ULTRA_COMPILER_PATH}/`      : "/";
    const logFn = options.mode === "development"      ? (message: string) => log.info(message)      : (message: string) => console.info(message);
    this.use("*", logger(logFn));  }
  async init() {    log.debug("Initialising server");
    /**     * Parse the importMap if provided     */    this.importMap = this.importMapPath      ? await this.#parseJsonFile(this.importMapPath)      : undefined;
    /**     * Parse the provided asset manifest if we have an entrypoint     */    const assetManifest: [string, string][] | undefined =      this.mode === "production"        ? await this.#parseJsonFile(this.assetManifestPath)        : undefined;
    this.assetManifest = assetManifest ? new Map(assetManifest) : undefined;
    /**     * Prepare the entrypoint if provided an importMap     */    if (this.importMap) {      this.#importMapHandler(this.importMap);      this.entrypoint = this.#prepareEntrypoint(        this.importMap,        this.entrypoint,      );    }
    // Validate    this.#valid();  }
  render(    Component: ReactElement,    options?: UltraServerRenderOptions,  ) {    return this.renderWithContext(Component, undefined, options);  }
  renderWithContext(    Component: ReactElement,    context: Context | undefined,    options?: UltraServerRenderOptions,  ) {    log.debug("Rendering component");
    let bootstrapModules: string[] = [];
    if (options?.entrypoint) {      options.entrypoint = options?.entrypoint && this.importMap        ? this.#prepareEntrypoint(this.importMap, options.entrypoint)        : undefined;    }
    const entrypoint = options?.entrypoint || this.entrypoint;
    if (entrypoint) {      bootstrapModules = [        entrypoint.startsWith("file://") ? fromFileUrl(entrypoint) : entrypoint,      ];    }
    return renderToStream(Component, context, {      mode: this.mode,      baseUrl: this.baseUrl,      assetManifest: this.assetManifest,      importMap: this.importMap,      enableEsModuleShims: this.enableEsModuleShims,      esModuleShimsPath: this.esModuleShimsPath,      bootstrapModules,      ...options,    });  }
  async #parseJsonFile<T>(path: string): Promise<T> {    try {      log.debug(sprintf("Parsing JSON: %s", path));
      const bytes = await fetch(path).then((response) =>        response.arrayBuffer()      );      const content = new TextDecoder().decode(bytes);
      const json = JSON.parse(content);      log.debug(json);
      return json;    } catch (cause) {      throw new Error(sprintf("Failed to parse JSON file at path: %s", path), {        cause,      });    }  }
  #importMapHandler(importMap: ImportMap | undefined) {    if (importMap?.imports) {      const ultraUrl = importMap.imports["ultra/"];      // Set importMap for ultra/ framework      if (ultraUrl && !ultraUrl.startsWith("http")) {        if (ultraUrl.startsWith("/")) {          this.ultraDir = ultraUrl;        } else {          this.ultraDir = resolve(Deno.cwd(), ultraUrl);        }        importMap.imports["ultra/"] = "/ultra/";      }    }  }
  #valid() {    // Check we have an importMap if we we're provided an entrypoint    if (!this.importMap && this.entrypoint) {      throw new Error("Import map has not been parsed.");    }  }
  #prepareEntrypoint(importMap: ImportMap, entrypoint?: string) {    if (!entrypoint) {      log.debug("No entrypoint provided, hydration disabled.");      return entrypoint;    }
    log.debug(sprintf("Resolving entrypoint: %s", entrypoint));
    let entrypointSpecifier = `./${      relative(this.root, fromFileUrl(entrypoint))    }`;
    if (this.mode === "production") {      for (const [specifier, resolved] of Object.entries(importMap.imports)) {        if (specifier === entrypointSpecifier) {          entrypointSpecifier = resolved.replace("./", "/");        }      }    } else {      entrypointSpecifier = toUltraUrl(this.root, entrypoint, this.mode)!;    }
    log.debug(sprintf("Resolved entrypoint: %s", entrypointSpecifier));
    return entrypointSpecifier;  }}