// ── Session Edit Page ──

let _sessionAvatarEditor = null;
let _sessionContextMde = null;

registerPage('session', {
  async init(params) {
    const sessionId = params.id;
    const isNew = !sessionId;
    let session = null;

    if (!isNew) {
      session = await apiGetSession(sessionId);
      if (!session) return navigateTo('dashboard');
    }

    const titleEl = document.getElementById('sessionPageTitle');
    const nameEl = document.getElementById('sessionName');
    const descEl = document.getElementById('sessionDescription');
    const contextEl = document.getElementById('sessionContext');
    const workspaceEl = document.getElementById('sessionWorkspace');
    const agentSelect = document.getElementById('agentSelect');
    const agentSelectCard = document.getElementById('agentSelectCard');
    const preparerAgentSelect = document.getElementById('preparerAgentSelect');
    const preparerAgentSelectCard = document.getElementById('preparerAgentSelectCard');
    const reviewAgentSelect = document.getElementById('reviewAgentSelect');
    const reviewAgentSelectCard = document.getElementById('reviewAgentSelectCard');
    const reviewIterationsRow = document.getElementById('reviewIterationsRow');
    const maxReviewIterationsEl = document.getElementById('maxReviewIterations');
    const finalizerAgentSelect = document.getElementById('finalizerAgentSelect');
    const finalizerAgentSelectCard = document.getElementById('finalizerAgentSelectCard');
    const imagePreview = document.getElementById('sessionImagePreview');
    const saveBtn = document.getElementById('sessionSaveBtn');
    const cancelBtn = document.getElementById('sessionCancelBtn');
    const deleteBtn = document.getElementById('sessionDeleteBtn');
    const commandsList = document.getElementById('customCommandsList');
    const addCommandBtn = document.getElementById('addCommandBtn');
    const more = document.querySelector('.more');

    // Avatar Editor initialisieren
    _sessionAvatarEditor = AvatarEditor.init({
      previewEl: imagePreview,
      initialImage: (session && session.image) || null,
      initialScale: (session && session.avatarScale) || 1,
      initialOffsetX: (session && session.avatarOffsetX) || 0,
      initialOffsetY: (session && session.avatarOffsetY) || 0
    });

    if (session) {
      titleEl.textContent = session.name || 'Unbenannt';
      nameEl.value = session.name || '';
      descEl.value = session.description || '';
      workspaceEl.value = session.workspace || '';
      deleteBtn.hidden = false;

      // Custom Commands laden
      loadCommandsIntoUI(commandsList, session.customCommands);
    } else {
      titleEl.textContent = 'Neue Session';
      deleteBtn.hidden = true;
    }

    // EasyMDE für Kontext
    _sessionContextMde = new EasyMDE({
      element: contextEl,
      initialValue: (session && session.context) || '',
      toolbar: ['bold', 'italic', 'heading', '|', 'unordered-list', 'ordered-list', '|', 'link', 'code', '|', 'preview'],
      status: false,
      spellChecker: false,
      autoDownloadFontAwesome: false,
      minHeight: '120px',
      placeholder: 'Zusätzlicher Kontext für den System-Prompt (optional)',
      previewClass: ['editor-preview', 'markdown']
    });
    _sessionContextMde.codemirror.setOption('theme', 'default');
    _sessionContextMde.codemirror.getWrapperElement().closest('.EasyMDEContainer').classList.add('fe-mde-wrap');

    // Befehl hinzufügen
    addCommandBtn.addEventListener('click', () => createCommandRow(commandsList));

    // Telegram-Section nur für existierende Sessions
    if (!isNew) {
      initSessionTelegram(sessionId);
    }

    // Agents laden + Skills parallel
    const agents = await apiGetAgents();
    const agentMap = {};
    for (const a of agents) agentMap[a.agentId] = a;

    const agentSkillsMap = {};
    await Promise.all(agents.map(async a => {
      agentSkillsMap[a.agentId] = await apiGetAgentSkills(a.agentId);
    }));

    function renderAgentInCard(cardEl, agent, emptyIcon, emptyText) {
      cardEl.innerHTML = '';
      if (!agent) {
        cardEl.innerHTML = '<div class="agent-select-empty"><i class="fa ' + emptyIcon + '"></i> ' + emptyText + '</div>';
        return;
      }
      const skills = agentSkillsMap[agent.agentId] || [];
      const inner = buildAgentCard(agent, skills);
      while (inner.firstChild) cardEl.appendChild(inner.firstChild);
      cardEl.insertAdjacentHTML('beforeend', '<span class="agent-select-change"><i class="fa fa-pencil"></i></span>');
    }

    function updateReviewVisibility() {
      reviewIterationsRow.hidden = !reviewAgentSelect.value;
    }

    // Initiale Anzeige – Agent
    if (session && session.agentId) {
      agentSelect.value = session.agentId;
      renderAgentInCard(agentSelectCard, agentMap[session.agentId] || null, 'fa-user-circle-o', 'Kein Agent ausgewählt');
    } else {
      renderAgentInCard(agentSelectCard, null, 'fa-user-circle-o', 'Kein Agent ausgewählt');
    }

    // Initiale Anzeige – Preparer-Agent
    if (session && session.preparerAgentId) {
      preparerAgentSelect.value = session.preparerAgentId;
      renderAgentInCard(preparerAgentSelectCard, agentMap[session.preparerAgentId] || null, 'fa-filter', 'Kein Vorbereiter-Agent');
    } else {
      renderAgentInCard(preparerAgentSelectCard, null, 'fa-filter', 'Kein Vorbereiter-Agent');
    }

    // Initiale Anzeige – Review-Agent
    if (session && session.reviewAgentId) {
      reviewAgentSelect.value = session.reviewAgentId;
      renderAgentInCard(reviewAgentSelectCard, agentMap[session.reviewAgentId] || null, 'fa-check-circle-o', 'Kein Review-Agent');
      maxReviewIterationsEl.value = session.maxReviewIterations || 3;
    } else {
      renderAgentInCard(reviewAgentSelectCard, null, 'fa-check-circle-o', 'Kein Review-Agent');
    }
    updateReviewVisibility();

    // Initiale Anzeige – Finalizer-Agent
    if (session && session.finalizerAgentId) {
      finalizerAgentSelect.value = session.finalizerAgentId;
      renderAgentInCard(finalizerAgentSelectCard, agentMap[session.finalizerAgentId] || null, 'fa-flag-checkered', 'Kein Finalizer-Agent');
    } else {
      renderAgentInCard(finalizerAgentSelectCard, null, 'fa-flag-checkered', 'Kein Finalizer-Agent');
    }

    // Klick auf Agent-Card → Modal öffnen
    agentSelectCard.addEventListener('click', () => {
      openAgentPickerModal(agents, agentSkillsMap, agentSelect.value, (selectedId) => {
        agentSelect.value = selectedId || '';
        renderAgentInCard(agentSelectCard, selectedId ? agentMap[selectedId] : null, 'fa-user-circle-o', 'Kein Agent ausgewählt');
      });
    });

    // Klick auf Preparer-Agent-Card → Modal öffnen
    preparerAgentSelectCard.addEventListener('click', () => {
      openAgentPickerModal(agents, agentSkillsMap, preparerAgentSelect.value, (selectedId) => {
        preparerAgentSelect.value = selectedId || '';
        renderAgentInCard(preparerAgentSelectCard, selectedId ? agentMap[selectedId] : null, 'fa-filter', 'Kein Vorbereiter-Agent');
      });
    });

    // Klick auf Review-Agent-Card → Modal öffnen
    reviewAgentSelectCard.addEventListener('click', () => {
      openAgentPickerModal(agents, agentSkillsMap, reviewAgentSelect.value, (selectedId) => {
        reviewAgentSelect.value = selectedId || '';
        renderAgentInCard(reviewAgentSelectCard, selectedId ? agentMap[selectedId] : null, 'fa-check-circle-o', 'Kein Review-Agent');
        updateReviewVisibility();
      });
    });

    // Klick auf Finalizer-Agent-Card → Modal öffnen
    finalizerAgentSelectCard.addEventListener('click', () => {
      openAgentPickerModal(agents, agentSkillsMap, finalizerAgentSelect.value, (selectedId) => {
        finalizerAgentSelect.value = selectedId || '';
        renderAgentInCard(finalizerAgentSelectCard, selectedId ? agentMap[selectedId] : null, 'fa-flag-checkered', 'Kein Finalizer-Agent');
      });
    });

    more.addEventListener('click', () => {
      const content = more.querySelector('[hidden]');
      while (content.firstChild)
          more.parentNode.insertBefore(content.firstChild, more);
      more.remove();
    });

    // Workspace Browse
    const workspaceBrowse = document.getElementById('sessionWorkspaceBrowse');
    if (workspaceBrowse) {
      workspaceBrowse.addEventListener('click', () => {
        const defaultPath = (currentUser && currentUser.defaultPath) || '';
        const currentVal = workspaceEl.value.trim();
        // Für den Folder-Browser den absoluten Startpfad zusammenbauen
        let startPath = '/';
        if (defaultPath && currentVal) {
          startPath = defaultPath.replace(/\/+$/, '') + '/' + currentVal;
        } else if (defaultPath) {
          startPath = defaultPath;
        } else if (currentVal) {
          startPath = currentVal;
        }
        openFolderBrowser({
          startPath,
          basePath: defaultPath || null,
          onSelect(absolutePath) {
            // Relativen Pfad zum DefaultPath berechnen
            if (defaultPath && absolutePath.startsWith(defaultPath)) {
              let rel = absolutePath.slice(defaultPath.length).replace(/^\/+/, '');
              workspaceEl.value = rel || '';
            } else {
              // Kein DefaultPath oder Pfad außerhalb → absoluten Pfad beibehalten (Legacy)
              workspaceEl.value = absolutePath;
            }
          }
        });
      });
    }

    // Speichern
    saveBtn.addEventListener('click', async () => {
      const commands = getCommandsFromUI(commandsList);
      const data = {
        name: nameEl.value.trim() || 'Unbenannt',
        description: descEl.value.trim(),
        image: _sessionAvatarEditor.getImage(),
        agentId: agentSelect.value || null,
        reviewAgentId: reviewAgentSelect.value || null,
        maxReviewIterations: parseInt(maxReviewIterationsEl.value) || 3,
        finalizerAgentId: finalizerAgentSelect.value || null,
        preparerAgentId: preparerAgentSelect.value || null,
        context: _sessionContextMde.value().trim() || null,
        workspace: workspaceEl.value.trim() || null,
        customCommands: commands,
        avatarScale: _sessionAvatarEditor.getScale(),
        avatarOffsetX: _sessionAvatarEditor.getOffsetX(),
        avatarOffsetY: _sessionAvatarEditor.getOffsetY()
      };

      if (isNew) {
        await apiCreateSession(data);
      } else {
        await apiUpdateSession(sessionId, data);
        // Telegram-Config mitspeichern (falls Section sichtbar)
        var tgToken = document.getElementById('sessionTelegramToken');
        var tgSecret = document.getElementById('sessionTelegramSecret');
        if (tgToken) {
          try {
            await saveTelegramConfig(sessionId, tgToken, tgSecret);
          } catch(e) {
            showToast('Session gespeichert, aber Telegram-Fehler: ' + e.message, 'error');
            return;
          }
        }
      }
      navigateTo('dashboard');
    });

    // Abbrechen
    cancelBtn.addEventListener('click', () => navigateTo('dashboard'));

    // Löschen
    deleteBtn.addEventListener('click', async () => {
      if (!confirm('Session wirklich löschen?')) return;
      await apiDeleteSession(sessionId);
      navigateTo('dashboard');
    });
  },
  destroy() {
    if (_sessionContextMde) {
      _sessionContextMde.toTextArea();
      _sessionContextMde = null;
    }
    if (_sessionAvatarEditor) {
      _sessionAvatarEditor.destroy();
      _sessionAvatarEditor = null;
    }
  }
});

function openAgentPickerModal(agents, agentSkillsMap, currentId, onSelect) {
  // Overlay
  const overlay = document.createElement('div');
  overlay.className = 'agent-picker-overlay';

  const modal = document.createElement('div');
  modal.className = 'agent-picker-modal';

  // Header
  const header = document.createElement('div');
  header.className = 'agent-picker-header';
  header.innerHTML = '<span>Agent auswählen</span><button class="icon-btn agent-picker-close"><i class="fa fa-times"></i></button>';
  modal.appendChild(header);

  // Body
  const body = document.createElement('div');
  body.className = 'agent-picker-body';

  // "Kein Agent" Option
  const noneCard = document.createElement('div');
  noneCard.className = 'card agent-picker-item' + (!currentId ? ' selected' : '');
  noneCard.innerHTML = `
    <div class="card-image" style="display:flex;align-items:center;justify-content:center"><i class="fa fa-ban" style="font-size:2em;opacity:var(--semi-transparent)"></i></div>
    <div class="card-body">
      <div class="card-title-row">
        <span class="card-title">Kein Agent</span>
      </div>
    </div>
  `;
  noneCard.addEventListener('click', () => {
    onSelect(null);
    overlay.remove();
  });
  body.appendChild(noneCard);

  // Agent Cards via Helper
  for (const a of agents) {
    const skills = agentSkillsMap[a.agentId] || [];
    const item = buildAgentCard(a, skills);
    item.classList.add('agent-picker-item');
    if (a.agentId === currentId) item.classList.add('selected');
    item.addEventListener('click', () => {
      onSelect(a.agentId);
      overlay.remove();
    });
    body.appendChild(item);
  }

  modal.appendChild(body);
  overlay.appendChild(modal);
  document.body.appendChild(overlay);

  // Schließen
  header.querySelector('.agent-picker-close').addEventListener('click', () => overlay.remove());
  overlay.addEventListener('click', (e) => {
    if (e.target === overlay) overlay.remove();
  });
}

function initSessionTelegram(sessionId) {
  var tokenInput = document.getElementById('sessionTelegramToken');
  var secretInput = document.getElementById('sessionTelegramSecret');
  var allowedInput = document.getElementById('sessionTelegramAllowed');
  var registerBtn = document.getElementById('sessionTelegramRegisterBtn');
  var deleteBtn = document.getElementById('sessionTelegramDeleteBtn');
  var statusBox = document.getElementById('sessionTelegramStatusBox');

  // Vorhandene Config laden + Status abrufen
  apiSessionTelegramGet(sessionId).then(async function(config) {
    if (config.botToken) tokenInput.value = config.botToken;
    if (config.allowedChatIds) allowedInput.value = config.allowedChatIds;
    if (config.webhookSecret) {
      secretInput.value = config.webhookSecret;
    } else {
      // Secret einmalig generieren und sofort persistent speichern
      var newSecret = crypto.randomUUID().replace(/-/g, '');
      secretInput.value = newSecret;
      await apiSessionTelegramSave(sessionId, config.botToken || '', newSecret);
    }
    // Status automatisch abrufen wenn Token konfiguriert ist
    if (config.botToken) {
      refreshTelegramStatus(sessionId, statusBox, registerBtn, deleteBtn);
    } else {
      showTelegramUnconfigured(statusBox, registerBtn, deleteBtn);
    }
  }).catch(function() {
    showTelegramUnconfigured(statusBox, registerBtn, deleteBtn);
  });

  // Webhook registrieren
  registerBtn.addEventListener('click', async function() {
    var baseUrl = prompt('Base-URL der App:', window.location.origin);
    if (!baseUrl) return;
    registerBtn.disabled = true;
    registerBtn.textContent = 'Wird registriert...';
    try {
      // Erst Token + Secret speichern (falls geändert)
      await saveTelegramConfig(sessionId, tokenInput, secretInput);
      var res = await apiSessionTelegramRegisterWebhook(sessionId, baseUrl.trim());
      if (res.ok) {
        showToast('Webhook registriert!', 'success');
      } else {
        showToast('Antwort: ' + JSON.stringify(res), 'error');
      }
    } catch(e) {
      showToast('Fehler: ' + e.message, 'error');
    } finally {
      registerBtn.disabled = false;
      registerBtn.textContent = 'Webhook registrieren';
      refreshTelegramStatus(sessionId, statusBox, registerBtn, deleteBtn);
    }
  });

  // Webhook entfernen
  deleteBtn.addEventListener('click', async function() {
    if (!confirm('Webhook wirklich entfernen?')) return;
    deleteBtn.disabled = true;
    deleteBtn.textContent = 'Wird entfernt...';
    try {
      var res = await apiSessionTelegramDeleteWebhook(sessionId);
      if (res.ok) {
        showToast('Webhook entfernt', 'success');
      } else {
        showToast('Antwort: ' + JSON.stringify(res), 'error');
      }
    } catch(e) {
      showToast('Fehler: ' + e.message, 'error');
    } finally {
      deleteBtn.disabled = false;
      deleteBtn.textContent = 'Webhook entfernen';
      refreshTelegramStatus(sessionId, statusBox, registerBtn, deleteBtn);
    }
  });
}

function showTelegramUnconfigured(statusBox, registerBtn, deleteBtn) {
  statusBox.innerHTML = '<p>⚠️ Kein Bot-Token konfiguriert. Speichere zuerst die Session mit einem Token.</p>';
  statusBox.hidden = false;
  registerBtn.hidden = true;
  deleteBtn.hidden = true;
}

async function refreshTelegramStatus(sessionId, statusBox, registerBtn, deleteBtn) {
  statusBox.hidden = true;
  try {
    var info = await apiSessionTelegramWebhookInfo(sessionId);
    var result = info.result || {};
    var url = result.url || '';
    var pending = result.pending_update_count || 0;
    var lastError = result.last_error_message;
    var active = !!url;

    var html = '';
    if (active) {
      html += '<p>✅ <strong>Webhook aktiv</strong></p>';
      html += '<p><strong>URL:</strong> ' + esc(url) + '</p>';
      html += '<p><strong>Ausstehend:</strong> ' + pending + '</p>';
      if (lastError) html += '<p class="tg-error"><strong>Letzter Fehler:</strong> ' + esc(lastError) + '</p>';
    } else {
      html += '<p>⚠️ <strong>Webhook nicht registriert</strong></p>';
    }
    statusBox.innerHTML = html;
    statusBox.hidden = false;

    // Buttons ein/ausblenden je nach Status
    registerBtn.hidden = active;
    deleteBtn.hidden = !active;
  } catch(e) {
    statusBox.innerHTML = '<p class="tg-error">Status konnte nicht abgerufen werden: ' + esc(e.message) + '</p>';
    statusBox.hidden = false;
    registerBtn.hidden = false;
    deleteBtn.hidden = true;
  }
}

async function saveTelegramConfig(sessionId, tokenInput, secretInput) {
  var token = tokenInput.value.trim();
  var secret = secretInput.value.trim();
  var allowedInput = document.getElementById('sessionTelegramAllowed');
  var allowed = allowedInput ? allowedInput.value.trim() : '';
  await apiSessionTelegramSave(sessionId, token, secret, allowed);
}