// UI based on zenity dialogs

import { Hasher } from "../hashing.ts";

async function askInput(label: string, password = false): Promise<string> {
  const process = Deno.run({
    cmd: ["zenity", password ? "--password" : "--entry", `--text=${label}`],
    stdout: "piped",
  });
  const output = await process.output();
  const result = new TextDecoder().decode(output).replace(/[ \n]+$/, "");
  return result;
}

async function showMessage(message: string): Promise<void> {
  const process = Deno.run({
    cmd: ["zenity", "--info", `--text=${message}`],
  });
  await process.status();
}

async function copyToClipboard(text: string): Promise<void> {
  const process = Deno.run({
    cmd: ["xclip"],
    stdin: "piped",
  });
  if (process.stdin) {
    await Deno.writeAll(process.stdin, new TextEncoder().encode(text));
    process.stdin.close();
  }
  await process.status();
}

async function readPrivateKey(): Promise<string> {
  let content: string;
  try {
    content = await Deno.readTextFile(".local/config.json");
  } catch {
    content = await Deno.readTextFile(
      `${Deno.env.get("HOME")}/.config/thunderk-passwordhash.json`,
    );
  }

  const config = JSON.parse(content);
  return config.privateKey;
}

export async function showZenityUI(): Promise<void> {
  const privateKey = await readPrivateKey();
  const siteTag = await askInput("site tag:");
  let password = await askInput("password:", true);
  if (password.slice(password.length - 1) != "#") {
    password += "#";
  }

  const hasher = new Hasher(privateKey);
  hasher.site_tag = siteTag;
  const result = hasher.tryHashing(password);
  if (result) {
    await copyToClipboard(result);
    await showMessage(`Your hashed password (copied to clipboard): ${result}`);
  } else {
    await showMessage(`Error in hashing password`);
  }
}