'use strict';

const PAIRING_STORAGE_KEY = 'aptPairingSecret';
const PAIRING_SECRET_PATTERN = /^[A-Za-z0-9_-]{43}$/;

const pairingForm = document.getElementById('pairingForm');
const pairingSecretInput = document.getElementById('pairingSecret');
const pairingStatus = document.getElementById('pairingStatus');
const currentState = document.getElementById('currentState');
const forgetBtn = document.getElementById('forgetBtn');

function setStatus(message, type) {
  pairingStatus.textContent = message;
  pairingStatus.className = `status ${type}`;
}

function renderPairingState(paired) {
  currentState.textContent = paired ? 'Paired on this Chrome profile.' : 'Not paired.';
  currentState.className = paired ? 'paired' : 'unpaired';
  forgetBtn.disabled = !paired;
}

async function refreshPairingState() {
  const stored = await chrome.storage.local.get(PAIRING_STORAGE_KEY);
  const candidate = stored && stored[PAIRING_STORAGE_KEY];
  renderPairingState(PAIRING_SECRET_PATTERN.test(typeof candidate === 'string' ? candidate : ''));
}

pairingForm.addEventListener('submit', async (event) => {
  event.preventDefault();
  const candidate = pairingSecretInput.value.trim();
  pairingSecretInput.value = '';

  if (!PAIRING_SECRET_PATTERN.test(candidate)) {
    setStatus('That secret is not valid. Generate a new pairing secret in APT and paste it exactly.', 'error');
    return;
  }

  try {
    await chrome.storage.local.set({ [PAIRING_STORAGE_KEY]: candidate });
    setStatus('Pairing saved. You can now use Send to APT from an Alta tab.', 'success');
    renderPairingState(true);
  } catch {
    setStatus('Chrome could not save the pairing. Try again.', 'error');
  }
});

forgetBtn.addEventListener('click', async () => {
  try {
    await chrome.storage.local.remove(PAIRING_STORAGE_KEY);
    renderPairingState(false);
    setStatus('Pairing forgotten. Revoke or rotate it in APT as well.', 'success');
  } catch {
    setStatus('Chrome could not forget the pairing. Try again.', 'error');
  }
});

refreshPairingState().catch(() => {
  renderPairingState(false);
  setStatus('Chrome could not read pairing state.', 'error');
});