import { renderHeader } from '../components/header.js';
import { directMessages } from '../mock-data.js';
import {
  addAppLogEntry,
  addChatMessage,
  addSignedMessageToChat,
  addSystemChatMessage,
  addOutgoingPendingMessage,
  getChatMessages,
  markChatRead,
  markOutgoingSent,
  markReadReceiptSentByBaseKey,
  normalizeDmChatId,
  authService,
  setContacts,
  state,
} from '../state.js';
import { startOutgoingCall } from '../services/call-service.js';
import { openSpeechInputModal } from '../components/speech-input-modal.js';
import { isSpeechToTextConfigured, isTextToSpeechConfigured, speakTextBySettings } from '../services/speech-tools-service.js';
import { showToast } from '../services/channels-ux.js';

export const pageMeta = { id: 'chat-view', title: 'Чат' };

function truncatePreviewText(value, maxLen = 72) {
  const normalized = String(value || '').replace(/\s+/g, ' ').trim();
  if (!normalized) return '';
  if (normalized.length <= maxLen) return normalized;
  return `${normalized.slice(0, Math.max(0, maxLen - 1)).trimEnd()}…`;
}

function openDeleteMessageConfirmModal({ onConfirm }) {
  const root = document.getElementById('modal-root');
  if (!root) return;
  root.innerHTML = `
    <div class="modal" id="chat-delete-message-modal">
      <div class="modal-card stack dm-dialog-card">
        <h3 class="modal-title">Удалить сообщение?</h3>
        <p class="meta-muted">Оно исчезнет и у тебя, и у собеседника.</p>
        <div class="form-actions-grid">
          <button class="secondary-btn" type="button" id="chat-delete-message-no">Нет</button>
          <button class="primary-btn" type="button" id="chat-delete-message-yes">Да</button>
        </div>
      </div>
    </div>
  `;

  const close = () => {
    root.innerHTML = '';
  };

  root.querySelector('#chat-delete-message-no')?.addEventListener('click', close);
  root.querySelector('#chat-delete-message-yes')?.addEventListener('click', async () => {
    close();
    if (typeof onConfirm === 'function') await onConfirm();
  });
}

function openMessageActionsMenu({
  anchorX = 0,
  anchorY = 0,
  messageText = '',
  showReadAloud = true,
  canEdit = false,
  canDelete = false,
  onReadAloud,
  onEdit,
  onDelete,
}) {
  const root = document.getElementById('modal-root');
  if (!root) return;

  const menuId = `chat-message-actions-menu-${Date.now()}`;
  root.innerHTML = `
    <div class="dm-floating-menu-layer" id="chat-message-actions-layer">
      <div class="modal-card stack dm-message-actions-menu dm-message-actions-popover" id="${menuId}">
        <button class="secondary-btn dm-message-action-btn" type="button" id="msg-action-copy">Скопировать как текст</button>
        ${showReadAloud ? '<button class="secondary-btn dm-message-action-btn" type="button" id="msg-action-read">Прочесть</button>' : ''}
        ${canEdit ? '<button class="secondary-btn dm-message-action-btn" type="button" id="msg-action-edit">Изменить</button>' : ''}
        ${canDelete ? '<button class="secondary-btn dm-message-action-btn dm-message-action-btn--danger" type="button" id="msg-action-delete">Удалить</button>' : ''}
      </div>
    </div>
  `;

  const menu = root.querySelector(`#${menuId}`);
  if (!menu) return;

  const close = () => {
    document.removeEventListener('pointerdown', onDocumentPointerDown, true);
    window.removeEventListener('resize', close);
    window.removeEventListener('scroll', close, true);
    root.innerHTML = '';
  };

  const onDocumentPointerDown = (event) => {
    if (menu.contains(event.target)) return;
    close();
  };

  document.addEventListener('pointerdown', onDocumentPointerDown, true);
  window.addEventListener('resize', close);
  window.addEventListener('scroll', close, true);

  window.requestAnimationFrame(() => {
    const menuRect = menu.getBoundingClientRect();
    const viewportWidth = Math.max(document.documentElement.clientWidth || 0, window.innerWidth || 0);
    const viewportHeight = Math.max(document.documentElement.clientHeight || 0, window.innerHeight || 0);
    const left = Math.min(
      Math.max(12, Number(anchorX || 0) - (menuRect.width / 2)),
      Math.max(12, viewportWidth - menuRect.width - 12)
    );
    const top = Math.min(
      Math.max(12, Number(anchorY || 0) + 10),
      Math.max(12, viewportHeight - menuRect.height - 12)
    );
    menu.style.left = `${left}px`;
    menu.style.top = `${top}px`;
    menu.style.transformOrigin = `${Math.round(Number(anchorX || left) - left)}px top`;
    menu.classList.add('is-visible');
  });

  root.querySelector('#msg-action-copy')?.addEventListener('click', async () => {
    try {
      if (navigator?.clipboard?.writeText) {
        await navigator.clipboard.writeText(String(messageText || ''));
      }
      showToast('Сообщение скопированно', { timeoutMs: 1000 });
    } catch {
      showToast('Не удалось скопировать сообщение', { kind: 'error', timeoutMs: 1200 });
    } finally {
      close();
    }
  });

  root.querySelector('#msg-action-read')?.addEventListener('click', async () => {
    close();
    if (typeof onReadAloud === 'function') await onReadAloud();
  });

  root.querySelector('#msg-action-edit')?.addEventListener('click', async () => {
    close();
    if (typeof onEdit === 'function') await onEdit();
  });

  root.querySelector('#msg-action-delete')?.addEventListener('click', async () => {
    close();
    if (typeof onDelete === 'function') await onDelete();
  });
}

function showTtsMissingConfigDialog(navigate) {
  const root = document.getElementById('modal-root');
  if (!root) return;
  root.innerHTML = `
    <div class="modal" id="chat-tts-missing-modal">
      <div class="modal-card stack dm-dialog-card">
        <h3 class="modal-title">Озвучка не настроена</h3>
        <p class="meta-muted">Перейти в настройки инструментов?</p>
        <div class="form-actions-grid">
          <button class="secondary-btn" type="button" id="chat-tts-no">Нет</button>
          <button class="primary-btn" type="button" id="chat-tts-yes">Да</button>
        </div>
      </div>
    </div>
  `;
  const close = () => { root.innerHTML = ''; };
  root.querySelector('#chat-tts-no')?.addEventListener('click', close);
  root.querySelector('#chat-tts-yes')?.addEventListener('click', () => {
    close();
    navigate('tools-settings-view');
  });
}

function autoResizeComposer(textarea) {
  if (!textarea) return;
  textarea.style.height = 'auto';
  textarea.style.height = `${Math.min(180, Math.max(42, textarea.scrollHeight))}px`;
}

function openConfirmContactModal(targetLogin = '') {
  const root = document.getElementById('modal-root');
  if (!root) return Promise.resolve(false);
  return new Promise((resolve) => {
    root.innerHTML = `
      <div class="modal" id="contact-confirm-modal">
        <div class="modal-card stack dm-dialog-card">
          <h3 class="modal-title">Добавить собеседника</h3>
          <p class="meta-muted">Добавить пользователя @${targetLogin} в контакты?</p>
          <div class="form-actions-grid">
            <button class="secondary-btn" type="button" id="contact-confirm-no">Нет</button>
            <button class="primary-btn" type="button" id="contact-confirm-yes">Да</button>
          </div>
        </div>
      </div>
    `;

    const close = (answer) => {
      root.innerHTML = '';
      resolve(!!answer);
    };
    root.querySelector('#contact-confirm-no')?.addEventListener('click', () => close(false));
    root.querySelector('#contact-confirm-yes')?.addEventListener('click', () => close(true));
  });
}

function parseBaseKey(baseKey) {
  const raw = String(baseKey || '').trim();
  const parts = raw.split('|');
  if (parts.length < 4) return null;
  const fromLogin = parts[0] || '';
  const toLogin = parts[1] || '';
  const timeMs = Number(parts[2] || 0);
  const nonce = Number(parts[3] || 0);
  if (!fromLogin || !toLogin || !Number.isFinite(timeMs) || !Number.isFinite(nonce)) return null;
  return { fromLogin, toLogin, timeMs, nonce };
}

function resolveMessageTimeMs(msg) {
  const base = parseBaseKey(msg?.baseKey);
  if (base?.timeMs && Number.isFinite(base.timeMs) && base.timeMs > 0) return base.timeMs;

  const messageKey = String(msg?.messageKey || '').trim();
  if (messageKey) {
    const parts = messageKey.split('|');
    const timeMs = Number(parts[2] || 0);
    if (parts.length >= 4 && Number.isFinite(timeMs) && timeMs > 0) return timeMs;
  }

  const tempId = String(msg?.tempId || '').trim();
  if (tempId.startsWith('tmp-')) {
    const ts = Number(tempId.split('-')[1] || 0);
    if (Number.isFinite(ts) && ts > 0) return ts;
  }

  const fallback = Number(msg?.createdAtMs || 0);
  if (Number.isFinite(fallback) && fallback > 0) return fallback;
  return 0;
}

function formatMessageTime(valueMs) {
  const timeMs = Number(valueMs || 0);
  if (!Number.isFinite(timeMs) || timeMs <= 0) return '';
  return new Intl.DateTimeFormat('ru-RU', {
    day: '2-digit',
    month: '2-digit',
    year: '2-digit',
    hour: '2-digit',
    minute: '2-digit',
  }).format(new Date(timeMs));
}

function resolveDeliveryStatus(msg) {
  if (msg?.from !== 'out') return '';
  if (msg?.secondTick) return '✓✓';
  if (msg?.firstTick) return '✓';
  return '…';
}

function resolveMessageEditedTimeMs(msg) {
  const revisionTimeMs = Number(msg?.revisionTimeMs || 0);
  if (!Number.isFinite(revisionTimeMs) || revisionTimeMs <= 0) return 0;
  return revisionTimeMs;
}

function scrollToLatestMessage(list) {
  if (!list) return;
  const scrollContainer = list.closest('.screen-content') || list.parentElement || list;
  const lastBubble = list.lastElementChild;
  const apply = () => {
    if (lastBubble?.scrollIntoView) {
      lastBubble.scrollIntoView({ block: 'end', inline: 'nearest' });
    }
    scrollContainer.scrollTop = scrollContainer.scrollHeight;
  };
  apply();
  window.requestAnimationFrame(apply);
  window.requestAnimationFrame(() => window.requestAnimationFrame(apply));
  window.setTimeout(apply, 0);
  window.setTimeout(apply, 60);
  window.setTimeout(apply, 120);
  window.setTimeout(apply, 260);
}

function scrollToUnreadSeparator(list) {
  if (!list) return false;
  const separator = list.querySelector('.chat-unread-separator');
  if (!separator) return false;
  const scrollContainer = list.closest('.screen-content') || list.parentElement || list;
  const apply = () => {
    if (separator?.scrollIntoView) {
      separator.scrollIntoView({ block: 'start', inline: 'nearest' });
    }
    const bottomSlack = 72;
    scrollContainer.scrollTop = Math.max(0, scrollContainer.scrollTop - bottomSlack);
  };
  apply();
  window.requestAnimationFrame(apply);
  window.requestAnimationFrame(() => window.requestAnimationFrame(apply));
  window.setTimeout(apply, 60);
  window.setTimeout(apply, 160);
  return true;
}

function renderLog(list, chatId, { onOpenActions, markAsRead = true, scrollMode = 'latest' } = {}) {
  list.innerHTML = '';
  const messages = getChatMessages(chatId);
  let unreadSeparatorInserted = false;
  messages.forEach((msg) => {
    if (!unreadSeparatorInserted && msg?.from === 'in' && msg?.unread) {
      const sep = document.createElement('div');
      sep.className = 'chat-unread-separator';
      const label = document.createElement('span');
      label.textContent = 'Новые сообщения';
      sep.append(label);
      list.append(sep);
      unreadSeparatorInserted = true;
    }

    const bubble = document.createElement('div');
    const bubbleKind = String(msg?.kind || '').trim();
    bubble.className = `bubble ${msg.from}${bubbleKind ? ` ${bubbleKind}` : ''}`;

    const textNode = document.createElement('div');
    textNode.className = 'bubble-text';
    textNode.textContent = msg.text || '';
    bubble.append(textNode);

    const metaNode = document.createElement('div');
    metaNode.className = 'bubble-meta';

    const timeNode = document.createElement('span');
    timeNode.className = 'bubble-time';
    timeNode.textContent = formatMessageTime(resolveMessageTimeMs(msg));
    metaNode.append(timeNode);

    const status = resolveDeliveryStatus(msg);
    if (status) {
      const statusNode = document.createElement('span');
      statusNode.className = 'bubble-status';
      statusNode.textContent = status;
      metaNode.append(statusNode);
    }

    bubble.append(metaNode);

    const editedAtMs = resolveMessageEditedTimeMs(msg);
    if (editedAtMs > 0) {
      const editedNode = document.createElement('div');
      editedNode.className = 'bubble-meta bubble-meta-edited';
      editedNode.textContent = `изменено: ${formatMessageTime(editedAtMs)}`;
      bubble.append(editedNode);
    }

    bubble.addEventListener('click', (event) => {
      if (typeof onOpenActions === 'function') onOpenActions(msg, event);
    });
    list.append(bubble);
  });
  if (scrollMode === 'unread' && !scrollToUnreadSeparator(list)) {
    scrollToLatestMessage(list);
  } else if (scrollMode === 'latest') {
    scrollToLatestMessage(list);
  }
  if (markAsRead) {
    markChatRead(chatId);
  }
}

function preserveComposerSelection(input, callback) {
  if (!input || typeof callback !== 'function') {
    if (typeof callback === 'function') callback();
    return;
  }

  const wasFocused = document.activeElement === input;
  const start = Number(input.selectionStart ?? input.value.length);
  const end = Number(input.selectionEnd ?? input.value.length);

  callback();

  if (!wasFocused) return;
  try {
    input.focus({ preventScroll: true });
  } catch {
    input.focus();
  }
  try {
    input.setSelectionRange(start, end);
  } catch {
    // ignore
  }
}

function setChatKeyboardOpen(isOpen) {
  document.body.classList.toggle('chat-keyboard-open', !!isOpen);
}

export function render({ navigate, route }) {
  const routeChatId = route.params.chatId || 'u1';
  const chatId = normalizeDmChatId(routeChatId) || 'u1';
  const contact = directMessages.find((d) => normalizeDmChatId(d.id) === chatId) || {
    id: chatId,
    name: String(routeChatId || chatId),
    initials: (String(routeChatId || chatId)[0] || '?').toUpperCase(),
  };

  const screen = document.createElement('section');
  screen.className = 'stack dm-screen dm-chat-screen';
  const isSpeechToTextReady = isSpeechToTextConfigured(state.entrySettings);
  const isTextToSpeechReady = isTextToSpeechConfigured(state.entrySettings);
  const isKnownContact = (state.contacts || []).some((x) => String(x || '').toLowerCase() === String(chatId || '').toLowerCase());
  const hasUnreadIncoming = getChatMessages(chatId).some((msg) => msg?.from === 'in' && msg?.unread);

  const handleReadAloud = async (msg) => {
    if (!isTextToSpeechConfigured(state.entrySettings)) {
      showTtsMissingConfigDialog(navigate);
      return;
    }
    await speakTextBySettings(String(msg?.text || ''), state.entrySettings);
  };

  const wrap = document.createElement('div');
  wrap.className = 'chat-wrap dm-chat-wrap';

  const log = document.createElement('div');
  log.className = 'messages-log dm-messages-log';

  screen.append(
    renderHeader({
      title: `Чат с ${contact.name}`,
      leftAction: { label: '←', onClick: () => navigate('messages-list') },
      rightActions: [{
        label: 'Позвонить',
        onClick: async () => {
          try {
            await startOutgoingCall(chatId);
            renderLog(log, chatId, { onOpenActions: handleOpenActions });
          } catch (e) {
            addSystemChatMessage(chatId, `[Звонок] Ошибка запуска: ${e.message || 'unknown'}`, {
              from: 'out',
              kind: 'call-tech',
            });
            renderLog(log, chatId, { onOpenActions: handleOpenActions });
          }
        },
      }],
    })
  );

  if (!isKnownContact) {
    const card = document.createElement('div');
    card.className = 'card';
    const btn = document.createElement('button');
    btn.className = 'secondary-btn';
    btn.type = 'button';
    btn.textContent = 'Добавить собеседника в контакты';
    btn.addEventListener('click', async () => {
      try {
        const approved = await openConfirmContactModal(chatId);
        if (!approved) return;
        await authService.setUserRelation({
          login: state.session.login,
          toLogin: chatId,
          kind: 'contact',
          enabled: true,
          storagePwd: state.session.storagePwdInMemory,
        });
        const contactsPayload = await authService.listContacts();
        setContacts(contactsPayload?.contacts || []);
        addAppLogEntry({
          level: 'info',
          source: 'contacts',
          message: `Пользователь ${chatId} добавлен в контакты`,
        });
        card.remove();
      } catch (e) {
        addAppLogEntry({
          level: 'warn',
          source: 'contacts',
          message: 'Не удалось добавить пользователя в контакты',
          details: { login: chatId, error: e?.message || 'unknown' },
        });
      }
    });
    card.append(btn);
    screen.append(card);
  }

  const form = document.createElement('form');
  form.className = 'chat-input dm-chat-input';
  form.innerHTML = `
    <div class="dm-edit-banner" id="chat-edit-banner" hidden>
      <div class="dm-edit-banner__text" id="chat-edit-banner-text"></div>
      <button class="ghost-btn dm-edit-banner__close" type="button" id="chat-edit-cancel" title="Отменить редактирование">✕</button>
    </div>
    <textarea class="input dm-input" name="message" rows="1" placeholder="Введите сообщение" maxlength="12000"></textarea>
    <div class="dm-actions-col">
      ${isSpeechToTextReady ? '<button class="ghost-btn dm-voice-btn" type="button" id="chat-voice-input" title="Голосовой ввод">🎤</button>' : ''}
      <button class="primary-btn dm-send-btn dm-send-icon-btn" type="submit" title="Отправить">➤</button>
    </div>
  `;

  const input = form.elements.message;
  const editBanner = form.querySelector('#chat-edit-banner');
  const editBannerText = form.querySelector('#chat-edit-banner-text');
  const editCancelBtn = form.querySelector('#chat-edit-cancel');
  let activeEdit = null;
  let inputFocused = false;
  const baseViewportHeight = Math.max(window.visualViewport?.height || 0, window.innerHeight || 0);

  const syncKeyboardUi = () => {
    const viewportHeight = Math.max(window.visualViewport?.height || 0, window.innerHeight || 0);
    const viewportShrunk = baseViewportHeight - viewportHeight > 120;
    setChatKeyboardOpen(inputFocused && viewportShrunk);
    if (inputFocused) {
      window.requestAnimationFrame(() => scrollToLatestMessage(log));
    }
  };

  const syncEditBanner = () => {
    if (!editBanner || !editBannerText) return;
    if (!activeEdit) {
      editBanner.hidden = true;
      editBannerText.textContent = '';
      return;
    }
    editBanner.hidden = false;
    editBannerText.textContent = `Редактируем сообщение: ${truncatePreviewText(activeEdit.originalText, 110)}`;
  };

  const focusInputToEnd = () => {
    if (!input) return;
    input.focus();
    try {
      const nextPos = String(input.value || '').length;
      input.setSelectionRange(nextPos, nextPos);
    } catch {
      // ignore
    }
  };

  const cancelEditMode = ({ restoreDraft = true } = {}) => {
    if (!activeEdit) return;
    const draftToRestore = activeEdit.draftBeforeEdit;
    activeEdit = null;
    syncEditBanner();
    if (restoreDraft && input) {
      input.value = draftToRestore || '';
      autoResizeComposer(input);
      focusInputToEnd();
    }
  };

  const startEditMode = (msg) => {
    const base = parseBaseKey(msg?.baseKey);
    if (!base || msg?.from !== 'out') return;
    const currentDraft = String(input?.value || '');
    activeEdit = {
      messageKey: String(msg?.messageKey || ''),
      originalText: String(msg?.text || ''),
      draftBeforeEdit: activeEdit ? String(activeEdit.draftBeforeEdit || '') : currentDraft,
      timeMs: base.timeMs,
      nonce: base.nonce,
    };
    syncEditBanner();
    if (input) {
      input.value = String(msg?.text || '');
      autoResizeComposer(input);
      focusInputToEnd();
    }
  };

  const applyLocalRevision = ({ localOutgoingBlobB64, fallbackMessageKey = '', fallbackBaseKey = '' }) => {
    if (!localOutgoingBlobB64) return;
    try {
      const parsed = authService.parseSignedMessageBlob(localOutgoingBlobB64);
      addSignedMessageToChat({
        chatId,
        messageKey: fallbackMessageKey || parsed?.messageKey || '',
        baseKey: fallbackBaseKey || parsed?.baseKey || '',
        from: 'out',
        text: parsed?.text || '',
        messageType: Number(parsed?.messageType || 2),
        unread: false,
        rawBlobB64: localOutgoingBlobB64,
        revisionTimeMs: Number(parsed?.revisionTimeMs || 0),
        deleted: Boolean(parsed?.deleted),
      });
    } catch {
      // ignore local parse failure; server backlog/realtime will reconcile later
    }
  };

  const sendDeleteRevision = async (msg) => {
    const base = parseBaseKey(msg?.baseKey);
    if (!base) return;
    const result = await authService.deleteDirectMessage({
      login: state.session.login,
      toLogin: chatId,
      storagePwd: state.session.storagePwdInMemory,
      timeMs: base.timeMs,
      nonce: base.nonce,
      revisionTimeMs: Date.now(),
    });
    applyLocalRevision({
      localOutgoingBlobB64: result?.localOutgoingBlobB64 || '',
      fallbackMessageKey: result?.outgoingKey || '',
      fallbackBaseKey: result?.baseKey || result?.localBaseKey || '',
    });
    if (activeEdit?.messageKey && activeEdit.messageKey === String(msg?.messageKey || '')) {
      cancelEditMode({ restoreDraft: true });
    }
    renderLog(log, chatId, { onOpenActions: handleOpenActions });
  };

  const sendTextMessage = async (rawText) => {
    const text = String(rawText || '').trim();
    if (!text) return;
    const editing = activeEdit;
    const tempId = editing ? '' : addOutgoingPendingMessage(chatId, text);
    renderLog(log, chatId, { onOpenActions: handleOpenActions });
    scrollToLatestMessage(log);

    try {
      let result;
      if (editing) {
        result = await authService.sendDirectMessageRevision({
          login: state.session.login,
          toLogin: chatId,
          text,
          storagePwd: state.session.storagePwdInMemory,
          timeMs: editing.timeMs,
          nonce: editing.nonce,
          revisionTimeMs: Date.now(),
        });
      } else {
        result = await authService.sendDirectMessage({
          login: state.session.login,
          toLogin: chatId,
          text,
          storagePwd: state.session.storagePwdInMemory,
        });
        markOutgoingSent(tempId, {
          messageKey: result?.outgoingKey || '',
          baseKey: result?.baseKey || result?.localBaseKey || '',
        });
      }

      applyLocalRevision({
        localOutgoingBlobB64: result?.localOutgoingBlobB64 || '',
        fallbackMessageKey: result?.outgoingKey || '',
        fallbackBaseKey: result?.baseKey || result?.localBaseKey || '',
      });

      if (editing) {
        cancelEditMode({ restoreDraft: true });
      }

      renderLog(log, chatId, { onOpenActions: handleOpenActions });
      scrollToLatestMessage(log);
      window.requestAnimationFrame(() => scrollToLatestMessage(log));
      window.setTimeout(() => scrollToLatestMessage(log), 90);
      window.setTimeout(() => scrollToLatestMessage(log), 220);
      addAppLogEntry({
        level: 'info',
        source: 'outgoing-dm',
        message: editing ? `Сообщение изменено для ${chatId}` : `Сообщение отправлено для ${chatId}`,
        details: {
          toLogin: chatId,
          messageId: result?.outgoingKey || '',
          deliveredWsSessions: Number(result?.deliveredWsSessions || 0),
          deliveredWebPushSessions: Number(result?.deliveredWebPushSessions || 0),
        },
      });
    } catch (e) {
      if (input) {
        input.value = text;
        autoResizeComposer(input);
        focusInputToEnd();
      }
      addChatMessage(chatId, `${activeEdit ? 'Ошибка изменения' : 'Ошибка отправки'}: ${e.message || 'unknown'}`);
      addAppLogEntry({
        level: 'warn',
        source: 'outgoing-dm',
        message: activeEdit ? 'Ошибка редактирования личного сообщения' : 'Ошибка отправки личного сообщения',
        details: {
          toLogin: chatId,
          error: e?.message || 'unknown',
        },
      });
      renderLog(log, chatId, { onOpenActions: handleOpenActions });
    }
  };

  const handleOpenActions = (msg, event) => {
    openMessageActionsMenu({
      anchorX: Number(event?.clientX || 0),
      anchorY: Number(event?.clientY || 0),
      messageText: msg?.text || '',
      showReadAloud: isTextToSpeechReady,
      canEdit: msg?.from === 'out' && Number(msg?.messageType || 0) === 2,
      canDelete: msg?.from === 'out' && Number(msg?.messageType || 0) === 2,
      onReadAloud: async () => handleReadAloud(msg),
      onEdit: async () => {
        startEditMode(msg);
      },
      onDelete: async () => {
        openDeleteMessageConfirmModal({
          onConfirm: async () => {
            try {
              await sendDeleteRevision(msg);
            } catch (error) {
              showToast(`Не удалось удалить сообщение: ${error?.message || 'unknown'}`, { kind: 'error', timeoutMs: 1500 });
            }
          },
        });
      },
    });
  };

  editCancelBtn?.addEventListener('click', () => {
    cancelEditMode({ restoreDraft: true });
  });

  autoResizeComposer(input);
  input?.addEventListener('input', () => autoResizeComposer(input));
  input?.addEventListener('focus', () => {
    inputFocused = true;
    syncKeyboardUi();
    scrollToLatestMessage(log);
  });
  input?.addEventListener('blur', () => {
    inputFocused = false;
    setChatKeyboardOpen(false);
  });
  input?.addEventListener('keydown', async (event) => {
    if (event.key !== 'Enter') return;
    if (event.ctrlKey) {
      event.preventDefault();
      const start = Number(input.selectionStart ?? input.value.length);
      const end = Number(input.selectionEnd ?? input.value.length);
      const value = String(input.value || '');
      input.value = `${value.slice(0, start)}\n${value.slice(end)}`;
      const nextPos = start + 1;
      try {
        input.setSelectionRange(nextPos, nextPos);
      } catch {
        // ignore
      }
      autoResizeComposer(input);
      return;
    }
    event.preventDefault();
    const text = String(input.value || '').trim();
    if (!text) return;
    input.value = '';
    autoResizeComposer(input);
    await sendTextMessage(text);
  });

  form.querySelector('#chat-voice-input')?.addEventListener('click', async () => {
    await openSpeechInputModal({
      navigate,
      onTextReady: (text) => {
        const prev = String(input.value || '').trim();
        input.value = prev ? `${prev} ${text}` : text;
        autoResizeComposer(input);
      },
      onSendText: async (text) => sendTextMessage(text),
      onSendQueued: () => {
        showToast('Сообщение будет отправлено автоматически после распознавания', { timeoutMs: 1000 });
      },
    });
  });

  form.addEventListener('submit', async (event) => {
    event.preventDefault();
    const text = String(input.value || '').trim();
    if (!text) return;
    input.value = '';
    autoResizeComposer(input);
    await sendTextMessage(text);
  });

  const handleIncomingChatRefresh = async (event) => {
    const updatedChatId = normalizeDmChatId(event?.detail?.chatId);
    if (updatedChatId !== chatId) return;
    preserveComposerSelection(input, () => {
      renderLog(log, chatId, { onOpenActions: handleOpenActions, scrollMode: 'latest' });
    });
    window.requestAnimationFrame(() => scrollToLatestMessage(log));
    void sendReadReceiptsForVisible(chatId);
  };

  window.addEventListener('shine-chat-messages-updated', handleIncomingChatRefresh);
  window.visualViewport?.addEventListener('resize', syncKeyboardUi);
  window.addEventListener('resize', syncKeyboardUi);

  wrap.append(log, form);
  screen.append(wrap);
  renderLog(log, chatId, {
    onOpenActions: handleOpenActions,
    markAsRead: false,
    scrollMode: hasUnreadIncoming ? 'unread' : 'latest',
  });
  if (hasUnreadIncoming) {
    window.requestAnimationFrame(() => scrollToUnreadSeparator(log));
    window.setTimeout(() => scrollToUnreadSeparator(log), 180);
  } else {
    window.requestAnimationFrame(() => scrollToLatestMessage(log));
    window.setTimeout(() => scrollToLatestMessage(log), 180);
  }
  window.setTimeout(() => markChatRead(chatId), 220);
  void sendReadReceiptsForVisible(chatId);
  screen.cleanup = () => {
    setChatKeyboardOpen(false);
    window.removeEventListener('shine-chat-messages-updated', handleIncomingChatRefresh);
    window.visualViewport?.removeEventListener('resize', syncKeyboardUi);
    window.removeEventListener('resize', syncKeyboardUi);
  };
  return screen;
}

async function sendReadReceiptsForVisible(chatId) {
  const pending = getChatMessages(chatId)
      .filter((row) => row?.from === 'in' && Number(row?.messageType) === 1 && !row?.readReceiptSent)
      .slice(0, 50);
  for (const row of pending) {
    const ref = parseBaseKey(row.baseKey);
    if (!ref) continue;
    try {
      await authService.sendReadReceipt({
        login: state.session.login,
        toLogin: ref.fromLogin,
        storagePwd: state.session.storagePwdInMemory,
        refToLogin: ref.toLogin,
        refFromLogin: ref.fromLogin,
        refTimeMs: ref.timeMs,
        refNonce: ref.nonce,
        refType: 1,
      });
      if (row.baseKey) {
        markReadReceiptSentByBaseKey(row.baseKey);
      } else {
        row.readReceiptSent = true;
      }
    } catch (e) {
      addAppLogEntry({
        level: 'warn',
        source: 'read-receipt',
        message: 'Не удалось отправить подтверждение прочтения',
        details: { chatId, messageKey: row.messageKey || '', error: e?.message || 'unknown' },
      });
    }
  }
}