// --- Constants ---
const app = document.querySelector("#app");
const delay = ms => new Promise(res => setTimeout(res, ms));

// --- Data Definitions ---
const links = [
  { name: "blog", url: "https://blog.rikki.moe", desc: "Who am i and what do i do." },
  { name: "git", url: "https://git.rikki.moe", desc: "My personal git server." },
  { name: "github", url: "https://github.com/rikkix", desc: "My github page with my projects. Follow me there ;)" },
  { name: "matrix-chat", url: "https://chat.mtf.moe", desc: "My personal matrix chat server." }
];

const commands = [
  ...links,
  { name: "email", desc: "Get my email address." },
  { name: "help", desc: "Show the list of commands." },
  { name: "clear", desc: "Clear the terminal." }
];

// --- Event Listeners ---
app.addEventListener("keypress", async function (event) {
  if (event.key === "Enter") {
    await delay(150);
    await executeInput();
  }
});

app.addEventListener("click", function () {
  const input = document.querySelector("input");
  input.focus();
});

// --- Terminal Initialization ---
async function open_terminal() {
  createText("Welcome to Rikki's terminal");
  await delay(700);
  createText("Type 'help' to see the list of commands.");
  await delay(500);
  new_line();
  executeInput("help");
}

// --- Utility Functions ---
function scrollToBottom() {
  const scrollHeight = app.scrollHeight;
  app.scrollTop = scrollHeight;
}

function new_line() {
  const p = document.createElement("p");
  const span1 = document.createElement("span");
  p.setAttribute("class", "path");
  p.textContent = "guest@rikki";
  span1.textContent = " ~";
  p.appendChild(span1);
  app.appendChild(p);

  const div = document.createElement("div");
  div.setAttribute("class", "type");
  const i = document.createElement("i");
  i.setAttribute("class", "fas fa-angle-right icone");
  const input = document.createElement("input");
  div.appendChild(i);
  div.appendChild(input);
  app.appendChild(div);
  input.focus();
}

function removeInput() {
  const div = document.querySelector(".type");
  app.removeChild(div);
}

// --- Command Handlers ---
async function executeInput(command) {
  var value = command ? command : document.querySelector("input").value;
  removeInput();

  value = value.trim();
  const args = value.split(" ");
  const commandName = args[0];

  await showOutput(commandName, args);
  new_line();
}

async function showOutput(command, args) {
  switch (command) {
    case "help":
      trueValue(command);
      help();
      break;
    case "clear":
      clearTerminal();
      break;
    case "su":
    case "sudo":
      trueValue(command);
      createText("You are now root.");
      await delay(400);
      createText("Just kidding, you are still guest.");
      break;
    case "email":
      trueValue(command);
      createText("Getting email address...");
      // record the time taken to get the email address
      const startTime = performance.now();
      const email = await getEmailAddress();
      const endTime = performance.now();
      const timeTaken = endTime - startTime;
      createText(`The email address is: <a href="mailto:${email}" target="_blank">${email}</a> (${timeTaken.toFixed(2)}ms)`);
      break;
    default:
      handleLinkCommands(command);
      break;
  }
}

function help() {
  commands.forEach(command => printCommand(command.name, command.desc));
}

function clearTerminal() {
  document.querySelectorAll("p, section").forEach(e => e.parentNode.removeChild(e));
}

async function handleLinkCommands(command) {
  for (let link of links) {
    if (command === link.name) {
      trueValue(command);
      createText(`Opening ${link.name} (<a href="${link.url}" target="_blank">${link.url}</a>)`);
      scrollToBottom();
      await delay(400);
      window.open(link.url, "_blank");
      return;
    }
  }
  falseValue(command);
  createErrorText(`command not found: ${command}`);
}

// --- Command Output Helpers ---
function trueValue(value) {
  const div = document.createElement("section");
  div.setAttribute("class", "type2");
  const i = document.createElement("i");
  i.setAttribute("class", "fas fa-angle-right icone");
  const mensagem = document.createElement("h2");
  mensagem.setAttribute("class", "sucess");
  mensagem.textContent = `${value}`;
  div.appendChild(i);
  div.appendChild(mensagem);
  app.appendChild(div);
}

function falseValue(value) {
  const div = document.createElement("section");
  div.setAttribute("class", "type2");
  const i = document.createElement("i");
  i.setAttribute("class", "fas fa-angle-right icone error");
  const mensagem = document.createElement("h2");
  mensagem.setAttribute("class", "error");
  mensagem.textContent = `${value}`;
  div.appendChild(i);
  div.appendChild(mensagem);
  app.appendChild(div);
}

function createText(text) {
  const p = document.createElement("p");
  p.innerHTML = text;
  app.appendChild(p);
}

function printCommand(command, desc) {
  const p = document.createElement("p");
  p.setAttribute("class", "code");
  const cmdEle = document.createElement("a");
  cmdEle.setAttribute("class", "command");
  cmdEle.innerText = command;

  cmdEle.addEventListener("click", async function () {
    await delay(150);
    await executeInput(command);
  });

  cmdEle.style.cursor = "pointer";
  const descEle = document.createElement("span");
  descEle.setAttribute("class", "text");
  descEle.innerText = desc;

  p.appendChild(cmdEle);
  p.appendChild(document.createElement("br"));
  p.appendChild(descEle);

  app.appendChild(p);
}

function createErrorText(text) {
  const p = document.createElement("p");
  p.innerText = text;
  app.appendChild(p);
}

// --- Email Fetching ---
async function getEmailAddress() {
  const partHash = "2f5ab71af6dfd2f3c5444a2d690fbbb880ee87f9";
  const remainingPart = "rikki.moe";
  const chars = 'abcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*()';

  for (let i = 0; i < chars.length; i++) {
    for (let j = 0; j < chars.length; j++) {
      const part = chars[i] + chars[j];
      const hash = await String2Hash(part);
      if (hash === partHash) {
        return part + remainingPart;
      }
    }
  }

  return null;
}

async function String2Hash(username) {
  const encoder = new TextEncoder();
  const data = encoder.encode(username);
  const hashBuffer = await crypto.subtle.digest('SHA-1', data);
  return Array.from(new Uint8Array(hashBuffer)).map(b => b.toString(16).padStart(2, '0')).join('');
}

// --- Terminal Start ---
open_terminal();