// ── Telegram Bot Page ──

registerPage('telegram-bot', {
  async init(params) {
    var isEdit = params && params.id;
    var bot = null;

    var titleEl = document.getElementById('telegramBotPageTitle');
    var nameInput = document.getElementById('tgBotName');
    var tokenInput = document.getElementById('tgBotToken');
    var secretInput = document.getElementById('tgBotSecret');
    var copySecretBtn = document.getElementById('tgBotCopySecret');
    var webhookStatus = document.getElementById('tgBotWebhookStatus');
    var webhookRegisterBtn = document.getElementById('tgBotWebhookRegister');
    var webhookInfoBtn = document.getElementById('tgBotWebhookInfo');
    var webhookDeleteBtn = document.getElementById('tgBotWebhookDelete');
    var publicCheckbox = document.getElementById('tgBotPublic');
    var saveBtn = document.getElementById('tgBotSaveBtn');
    var cancelBtn = document.getElementById('tgBotCancelBtn');
    var deleteBtn = document.getElementById('tgBotDeleteBtn');

    if (isEdit) {
      bot = await apiGetTelegramBot(params.id);
      if (!bot) {
        showToast('Bot nicht gefunden', 'error');
        navigateTo('dashboard');
        return;
      }

      titleEl.textContent = bot.name || 'Telegram Bot';
      nameInput.value = bot.name || '';
      tokenInput.value = bot.botToken || '';
      publicCheckbox.checked = bot.isPublic || false;
      deleteBtn.hidden = false;

      secretInput.value = bot.webhookSecret || ``;
      _loadWebhookStatus(bot.botId, webhookStatus);
    } else {
      titleEl.textContent = 'Neuer Telegram Bot';
      deleteBtn.hidden = true;
    }

    // Copy Secret
    copySecretBtn.addEventListener('click', async function() {
      try {
        await navigator.clipboard.writeText(secretInput.value);
        showToast('Kopiert!');
      } catch(e) {
        showToast('Kopieren fehlgeschlagen', 'error');
      }
    });

    // Webhook registrieren
    webhookRegisterBtn.addEventListener('click', async function() {
      var baseUrl = prompt('Base-URL der App:', window.location.origin);
      if (!baseUrl) return;
      await withButtonLoading(webhookRegisterBtn, 'Registriere...', async function() {
        try {
          var res = await apiTelegramBotRegisterWebhook(bot.botId, baseUrl.trim());
          if (res.ok) {
            showToast('Webhook registriert!', 'success');
            _loadWebhookStatus(bot.botId, webhookStatus);
          } else {
            showToast('Fehler: ' + JSON.stringify(res), 'error');
          }
        } catch(err) {
          showToast('Fehler: ' + err.message, 'error');
        }
      });
    });

    // Webhook-Status prüfen
    webhookInfoBtn.addEventListener('click', async function() {
      await withButtonLoading(webhookInfoBtn, 'Prüfe...', async function() {
        await _loadWebhookStatus(bot.botId, webhookStatus);
      });
    });

    // Webhook entfernen
    webhookDeleteBtn.addEventListener('click', async function() {
      if (!confirm('Webhook wirklich entfernen?')) return;
      await withButtonLoading(webhookDeleteBtn, 'Entferne...', async function() {
        try {
          var res = await apiTelegramBotDeleteWebhook(bot.botId);
          if (res.ok) {
            showToast('Webhook entfernt', 'success');
            _loadWebhookStatus(bot.botId, webhookStatus);
          } else {
            showToast('Fehler: ' + JSON.stringify(res), 'error');
          }
        } catch(err) {
          showToast('Fehler: ' + err.message, 'error');
        }
      });
    });

    // Speichern
    saveBtn.addEventListener('click', async function() {
      var name = nameInput.value.trim();
      var token = tokenInput.value.trim();
      var isPublic = publicCheckbox.checked;
      if (!name || !token) {
        showToast('Name und Bot-Token sind erforderlich', 'error');
        return;
      }

      await withButtonLoading(saveBtn, 'Speichern...', async function() {
        try {
          if (isEdit) {
            await apiUpdateTelegramBot(bot.botId, name, token, isPublic);
            showToast('Bot gespeichert', 'success');
            // Titel aktualisieren
            titleEl.textContent = name;
          } else {
            var created = await apiCreateTelegramBot(name, token);
            showToast('Bot erstellt', 'success');
            navigateTo('telegram-bot', { id: created.botId });
          }
        } catch(e) {
          showToast('Fehler: ' + e.message, 'error');
        }
      });
    });

    // Abbrechen
    cancelBtn.addEventListener('click', function() {
      navigateTo('dashboard');
    });

    // Löschen
    deleteBtn.addEventListener('click', async function() {
      if (!confirm('Bot "' + (bot.name || '') + '" wirklich löschen? Alle Session-Verknüpfungen werden entfernt.')) return;
      try {
        await apiDeleteTelegramBot(bot.botId);
        showToast('Bot gelöscht', 'success');
        navigateTo('dashboard');
      } catch(e) {
        showToast('Fehler: ' + e.message, 'error');
      }
    });
  }
});

async function _loadWebhookStatus(botId, statusEl) {
  try {
    var info = await apiTelegramBotWebhookInfo(botId);
    var result = info.result || {};
    var url = result.url || '';
    var pending = result.pending_update_count || 0;
    var lastError = result.last_error_message || '';
    var lastErrorDate = result.last_error_date ? new Date(result.last_error_date * 1000).toLocaleString('de-AT') : '';

    var parts = [];
    if (url) {
      parts.push('<span class="status-active"><i class="fa fa-check-circle"></i> Webhook aktiv</span>');
      parts.push('<span><i class="fa fa-link"></i> ' + esc(url) + '</span>');
    } else {
      parts.push('<span class="status-inactive"><i class="fa fa-times-circle"></i> Kein Webhook registriert</span>');
    }

    if (pending > 0) {
      parts.push('<span><i class="fa fa-clock-o"></i> ' + pending + ' ausstehende Updates</span>');
    }

    if (lastError) {
      parts.push('<span class="status-error"><i class="fa fa-exclamation-triangle"></i> ' + esc(lastError) + (lastErrorDate ? ' (' + lastErrorDate + ')' : '') + '</span>');
    }

    statusEl.innerHTML = parts.join('');
    statusEl.hidden = false;
  } catch(e) {
    statusEl.innerHTML = '<span class="status-error"><i class="fa fa-exclamation-triangle"></i> Status konnte nicht geladen werden</span>';
    statusEl.hidden = false;
  }
}