import fs, { readFileSync } from "fs";
import { MongoClient } from "mongodb";
import util from "util";

const write = util.promisify(fs.writeFile);
const read = util.promisify(fs.readFile);

class Store {
  filename: string;
  record: Record<string, string>;
  constructor(filename: string) {
    this.filename = filename;
    try {
      this.record = JSON.parse(readFileSync(filename, "utf8"));
    } catch {
      this.record = {};
    }
  }
  public get() {
    return this.record;
  }
  public set(key: string, val: string) {
    this.record[key] = val;
  }
  public delete(key: string) {
    delete this.record[key];
  }
  public async update(record: Record<string, string>) {
    await write(this.filename, JSON.stringify(this.record), "utf8");
  }
}

class HTML {
  html: string;
  constructor() {
    // load from file
    try {
      this.html = fs.readFileSync("./html.html", "utf8");
    } catch {
      this.html = "";
    }
  }
  public get() {
    return this.html;
  }
  public async set(html: string) {
    this.html = html;
    // store into file
    await write("./html.html", html, "utf8");
  }
}

export const html = new HTML();
export const store = new Store("store.json");
export const regular = new Store("regular.json");