'use strict';

const logEl = document.getElementById('log');
const gameDirEl = document.getElementById('gameDir');
const btnBrowse = document.getElementById('btnBrowse');
const btnSave = document.getElementById('btnSaveFolder');
const btnSync = document.getElementById('btnSync');
const btnPlay = document.getElementById('btnPlay');
const btnCheckLauncher = document.getElementById('btnCheckLauncher');
const authCard = document.getElementById('authCard');
const btnAuth = document.getElementById('btnAuth');
const wowExeName = document.getElementById('wowExeName');

function log(msg) {
  logEl.textContent += (logEl.textContent ? '\n' : '') + msg;
  logEl.scrollTop = logEl.scrollHeight;
}

function setError(e) {
  const m = e && (e.message || String(e));
  log('Error: ' + m);
}

let authEnabled = false;
let signedIn = false;

async function refresh() {
  try {
    const s = await window.launcher.load();
    authEnabled = s.authEnabled;
    signedIn = !s.authEnabled;
    wowExeName.textContent = s.wowExe || 'Wow.exe';
    gameDirEl.value = s.gameDir || '';
    authCard.classList.toggle('hidden', !authEnabled);
    btnSync.disabled = !s.wowOk || (authEnabled && !signedIn);
    btnPlay.classList.add('hidden');
    btnPlay.disabled = true;
    logEl.textContent = '';
    if (!s.gameDir) log('Choose your WoW installation folder.');
    else if (!s.wowOk) log('Folder does not look valid yet — pick the directory that contains ' + (s.wowExe || 'Wow.exe') + ', then Save folder.');
    else if (authEnabled && !signedIn) log('Sign in, then download updates.');
    else log('Ready — tap Download updates to sync from GitHub.');
  } catch (e) {
    setError(e);
  }
}

window.launcher.onProgress((msg) => log(msg));

btnBrowse.addEventListener('click', async () => {
  try {
    const start = gameDirEl.value.trim();
    const r = await window.launcher.pickFolder(start);
    if (!r.canceled && r.path) {
      gameDirEl.value = r.path;
      log('Selected: ' + r.path);
    }
  } catch (e) {
    setError(e);
  }
});

btnSave.addEventListener('click', async () => {
  try {
    const dir = gameDirEl.value.trim();
    if (!dir) {
      log('Pick a folder with Browse… first.');
      return;
    }
    const r = await window.launcher.saveGameDir(dir);
    gameDirEl.value = r.gameDir;
    btnSync.disabled = !r.wowOk || (authEnabled && !signedIn);
    log('Saved installation folder.');
  } catch (e) {
    setError(e);
  }
});

btnAuth.addEventListener('click', async () => {
  try {
    const u = document.getElementById('username').value;
    const p = document.getElementById('password').value;
    await window.launcher.auth(u, p);
    signedIn = true;
    log('Signed in.');
    btnSync.disabled = !gameDirEl.value.trim() || (authEnabled && !signedIn);
    const s = await window.launcher.load();
    btnSync.disabled = !s.wowOk;
  } catch (e) {
    setError(e);
  }
});

btnSync.addEventListener('click', async () => {
  btnSync.disabled = true;
  log('—');
  try {
    await window.launcher.sync();
    btnPlay.classList.remove('hidden');
    btnPlay.disabled = false;
    log('Done. You can launch the game.');
  } catch (e) {
    setError(e);
  } finally {
    const s = await window.launcher.load().catch(() => null);
    btnSync.disabled = !s || !s.wowOk || (authEnabled && !signedIn);
  }
});

btnPlay.addEventListener('click', async () => {
  try {
    await window.launcher.play();
    window.close();
  } catch (e) {
    setError(e);
  }
});

btnCheckLauncher.addEventListener('click', async () => {
  try {
    log('Checking for launcher updates…');
    const r = await window.launcher.checkUpdates();
    if (r && r.skipped) log('Launcher auto-update: ' + (r.reason || 'skipped (use a packaged build).'));
    else if (r && r.ok === false && r.error) setError(new Error(r.error));
  } catch (e) {
    setError(e);
  }
});

refresh();