{% extends "base.html" %}
{% block title %}{{ board.name }} – Tuya Settings{% endblock %}

{% block content %}
<div class="container py-4" style="max-width:560px">
  <a href="{{ url_for('tuya.gateway', board_id=board.id) }}" class="btn btn-outline-secondary btn-sm mb-3">
    <i class="bi bi-arrow-left me-1"></i>Back to Gateway
  </a>

  <div class="card bg-dark border-secondary">
    <div class="card-header">
      <h5 class="mb-0">
        <i class="bi bi-qr-code me-2 text-info"></i>Tuya / Smart Life Account
      </h5>
    </div>
    <div class="card-body">

      {% with messages = get_flashed_messages(with_categories=true) %}
        {% if messages %}
          {% for cat, msg in messages %}
            <div class="alert alert-{{ cat }} py-2 alert-dismissible fade show" role="alert">
              {{ msg }}<button type="button" class="btn-close" data-bs-dismiss="alert"></button>
            </div>
          {% endfor %}
        {% endif %}
      {% endwith %}

      <p class="text-muted small mb-4">
        Link your <strong>Tuya / Smart Life</strong> account by scanning a QR code with
        the mobile app. No tokens or passwords are stored in plain text – only the
        access/refresh token pair returned by SSO is persisted.
      </p>

      {# Current status #}
      {% if board.config.get('tuya_token_info') %}
      <div class="alert alert-success py-2 d-flex align-items-center gap-2" id="linked-status">
        <i class="bi bi-check-circle-fill"></i>
        <span>
          Account linked.
          <small class="opacity-75">(User code: {{ board.config.get('tuya_user_code', '?') }})</small>
        </span>
      </div>
      {% else %}
      <div class="alert alert-secondary py-2 d-flex align-items-center gap-2" id="linked-status">
        <i class="bi bi-x-circle"></i>
        <span>No account linked yet.</span>
      </div>
      {% endif %}

      {# QR section #}
      <div id="qr-section">

        <div class="mb-3">
          <label for="input-user-code" class="form-label fw-semibold">Your Tuya User Code</label>
          <input type="text" id="input-user-code" class="form-control"
                 placeholder="e.g. myname123"
                 value="{{ board.config.get('tuya_user_code', '') }}">
          <div class="form-text">
            Choose any short identifier for this installation (letters and numbers, no spaces).
            You will need to remember it if you ever re-link the account.
          </div>
        </div>

        <button id="btn-start-qr" class="btn btn-info mb-3">
          <i class="bi bi-qr-code me-1"></i>Generate QR Code
        </button>

        <div id="qr-area" class="text-center d-none">
          <div id="qr-canvas" class="d-inline-block p-2 bg-white rounded mb-3"></div>
          <p class="text-muted small mb-1" id="qr-instruction">
            Open the <strong>Smart Life</strong> (or Tuya Smart) app → tap the
            <i class="bi bi-qr-code-scan"></i> scan icon → scan this QR code.
          </p>
          <div class="d-flex align-items-center justify-content-center gap-2 mt-2">
            <div class="spinner-border spinner-border-sm text-info" role="status" id="qr-spinner">
              <span class="visually-hidden">Waiting…</span>
            </div>
            <span class="text-muted small" id="qr-poll-msg">Waiting for scan…</span>
          </div>
          <button id="btn-cancel-qr" class="btn btn-outline-secondary btn-sm mt-3">Cancel</button>
        </div>
      </div>

    </div>
  </div>
</div>
{% endblock %}

{% block scripts %}
<!-- QR code renderer (MIT, CDN) -->
<script src="https://cdn.jsdelivr.net/npm/qrcode@1/build/qrcode.min.js"></script>
<script>
(function() {
  const BOARD_ID  = {{ board.id }};
  const QR_URL    = "{{ url_for('tuya.generate_qr',  board_id=board.id) }}";
  const POLL_URL  = "{{ url_for('tuya.poll_login',   board_id=board.id) }}";
  const SAVE_URL  = "{{ url_for('tuya.save_auth',    board_id=board.id) }}";
  const GW_URL    = "{{ url_for('tuya.gateway',       board_id=board.id) }}";

  let pollTimer   = null;
  let userCode    = null;
  let qrToken     = null;

  const btnStart  = document.getElementById('btn-start-qr');
  const btnCancel = document.getElementById('btn-cancel-qr');
  const qrArea    = document.getElementById('qr-area');
  const qrCanvas  = document.getElementById('qr-canvas');
  const spinner   = document.getElementById('qr-spinner');
  const pollMsg   = document.getElementById('qr-poll-msg');
  const statusDiv = document.getElementById('linked-status');
  const inputCode = document.getElementById('input-user-code');

  btnStart.addEventListener('click', startQr);
  btnCancel.addEventListener('click', cancelQr);

  function startQr() {
    const code = inputCode.value.trim();
    if (!code) {
      inputCode.focus();
      inputCode.classList.add('is-invalid');
      return;
    }
    inputCode.classList.remove('is-invalid');

    btnStart.disabled = true;
    btnStart.innerHTML = '<span class="spinner-border spinner-border-sm me-1"></span>Generating…';

    fetch(QR_URL, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ user_code: code }),
    })
      .then(r => r.json())
      .then(function(data) {
        if (!data.ok) { showError(data.error); btnStart.disabled = false; btnStart.innerHTML = '<i class="bi bi-qr-code me-1"></i>Generate QR Code'; return; }

        userCode = data.user_code;
        qrToken  = data.qr_token;

        // Render QR code into canvas div
        qrCanvas.innerHTML = '';
        QRCode.toCanvas(document.createElement('canvas'), data.qr_data, { width: 220 }, function(err, canvas) {
          if (err) { showError('QR render failed: ' + err); return; }
          qrCanvas.appendChild(canvas);
        });

        qrArea.classList.remove('d-none');
        btnStart.classList.add('d-none');
        inputCode.disabled = true;
        pollMsg.textContent = 'Waiting for scan…';
        spinner.classList.remove('d-none');

        // Start polling every 3 s
        pollTimer = setInterval(pollLogin, 3000);
      })
      .catch(function(err) { showError(err); btnStart.disabled = false; btnStart.innerHTML = '<i class="bi bi-qr-code me-1"></i>Generate QR Code'; });
  }

  function pollLogin() {
    const url = POLL_URL + '?token=' + encodeURIComponent(qrToken) + '&user_code=' + encodeURIComponent(userCode);
    fetch(url)
      .then(r => r.json())
      .then(function(data) {
        if (data.ok) {
          clearInterval(pollTimer);
          pollMsg.textContent = '✓ Scanned! Saving…';
          spinner.classList.add('d-none');
          saveTokens(data.info);
        } else if (data.error) {
          clearInterval(pollTimer);
          pollMsg.textContent = 'Error: ' + data.error;
          spinner.classList.add('d-none');
        }
        // else data.pending: keep waiting
      })
      .catch(function() { /* network hiccup – keep polling */ });
  }

  function saveTokens(info) {
    fetch(SAVE_URL, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ info: info, user_code: userCode }),
    })
    .then(r => r.json())
    .then(function(data) {
      if (data.ok) {
        pollMsg.textContent = '✓ Account linked successfully! Redirecting…';
        setTimeout(function() { window.location.href = data.redirect || GW_URL; }, 1500);
      } else {
        showError(data.error || 'Save failed');
      }
    })
    .catch(function(err) { showError(err); });
  }

  function cancelQr() {
    clearInterval(pollTimer);
    qrArea.classList.add('d-none');
    btnStart.classList.remove('d-none');
    btnStart.disabled = false;
    btnStart.innerHTML = '<i class="bi bi-qr-code me-1"></i>Generate QR Code';
    qrCanvas.innerHTML = '';
    inputCode.disabled = false;
  }

  function showError(msg) {
    const el = document.createElement('div');
    el.className = 'alert alert-danger py-2 mt-2';
    el.textContent = msg;
    qrCanvas.after(el);
  }
})();
</script>
{% endblock %}