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import HandlebarsJS from "https://esm.sh/handlebars@4.7.7";import { walk } from "https://deno.land/std@0.181.0/fs/mod.ts";import {  globToRegExp,  join,  normalize,} from "https://deno.land/std@0.181.0/path/mod.ts";const { readFile } = Deno;
export { HandlebarsJS };
export interface HandlebarsConfig {  baseDir: string;  extname: string;  layoutsDir: string;  partialsDir: string;  cachePartials?: boolean;  defaultLayout: string;  // deno-lint-ignore no-explicit-any  helpers: any;  // deno-lint-ignore no-explicit-any  compilerOptions: any;}
const DEFAULT_HANDLEBARS_CONFIG: HandlebarsConfig = {  baseDir: "views",  extname: ".hbs",  layoutsDir: "layouts/",  partialsDir: "partials/",  cachePartials: true,  defaultLayout: "main",  helpers: undefined,  compilerOptions: undefined,};
function getNormalizePath(path: string) {  return normalize(path).replace(/\\/g, "/");}
export class Handlebars {  #havePartialsBeenRegistered = false;
  constructor(private config: HandlebarsConfig = DEFAULT_HANDLEBARS_CONFIG) {    this.config = { ...DEFAULT_HANDLEBARS_CONFIG, ...config };
    if (this.config.helpers) {      const helperKeys = Object.keys(this.config.helpers);
      for (let i = 0; i < helperKeys.length; i++) {        const helperKey = helperKeys[i];        // deno-lint-ignore no-explicit-any        (HandlebarsJS as any).registerHelper(          helperKey,          this.config.helpers[helperKey],        );      }    }  }
  /**     * Processes of rendering view     *     * @param view     * @param context     * @param layout     */  public async renderView(    view: string,    context?: Record<string, unknown>,    layout?: string,  ): Promise<string> {    if (!view) {      console.warn("View is null");      return "";    }
    const config: HandlebarsConfig = this.config as HandlebarsConfig;
    if (!config.cachePartials || !this.#havePartialsBeenRegistered) {      await this.registerPartials();    }
    const path = join(config.baseDir, view + config.extname);    const body: string = await this.render(path, context);
    layout = (layout as string) || config.defaultLayout;
    if (layout) {      const layoutPath: string = join(        config.baseDir,        config.layoutsDir,        layout + config.extname,      );
      return this.render(layoutPath, { ...context, body });    }
    return body;  }
  /**     * Processes on render without partials and layouts     */  public async render(    path: string,    context?: Record<string, unknown>,  ): Promise<string> {    // TODO: use cashe    const source: string = new TextDecoder().decode(await readFile(path));    // deno-lint-ignore no-explicit-any    const template = (HandlebarsJS as any).compile(      source,      this.config!.compilerOptions,    );
    return template(context);  }
  /**     * Processes on register partials     */  private async registerPartials() {    const paths = await this.getTemplatesPath(      join(this.config.baseDir, this.config.partialsDir),    );    if (paths) {      for (const path of paths) {        const templateName: string = path          .replace(            getNormalizePath(this.config.baseDir) + "/" +              this.config!.partialsDir,            "",          )          .replace(new RegExp(this.config!.extname + "$"), "");        const source: string = new TextDecoder().decode(await readFile(path));
        // deno-lint-ignore no-explicit-any        (HandlebarsJS as any).registerPartial(templateName, source);      }    }
    this.#havePartialsBeenRegistered = true;  }
  /**     * Gets template pathes with glob match     */  private async getTemplatesPath(path: string): Promise<string[]> {    const arr: string[] = [];
    for await (      const w of walk(        path,        { match: [globToRegExp("**/*" + this.config!.extname)] },      )    ) {      if (w.isFile) {        arr.push(getNormalizePath(w.path));      }    }
    return arr;  }}