import { Fuse } from '../lib.js';

import {
    shuffle,
    onlyUnique,
    debounce,
    delay,
    isDataURL,
    createThumbnail,
    extractAllWords,
    saveBase64AsFile,
    PAGINATION_TEMPLATE,
    getBase64Async,
    resetScrollHeight,
    initScrollHeight,
    localizePagination,
    renderPaginationDropdown,
    paginationDropdownChangeHandler,
    waitUntilCondition,
} from './utils.js';
import { RA_CountCharTokens, humanizedDateTime, dragElement, favsToHotswap, getMessageTimeStamp } from './RossAscends-mods.js';
import { power_user, loadMovingUIState, sortEntitiesList } from './power-user.js';
import { debounce_timeout } from './constants.js';

import {
    chat,
    sendSystemMessage,
    printMessages,
    substituteParams,
    characters,
    default_avatar,
    addOneMessage,
    clearChat,
    Generate,
    select_rm_info,
    setCharacterId,
    setCharacterName,
    setEditedMessageId,
    is_send_press,
    name1,
    name2,
    resetChatState,
    setSendButtonState,
    getCharacters,
    system_message_types,
    online_status,
    talkativeness_default,
    selectRightMenuWithAnimation,
    deleteLastMessage,
    showSwipeButtons,
    hideSwipeButtons,
    chat_metadata,
    updateChatMetadata,
    getThumbnailUrl,
    getRequestHeaders,
    setMenuType,
    menu_type,
    select_selected_character,
    cancelTtsPlay,
    displayPastChats,
    sendMessageAsUser,
    getBiasStrings,
    saveChatConditional,
    deactivateSendButtons,
    activateSendButtons,
    eventSource,
    event_types,
    getCurrentChatId,
    setCharacterSettingsOverrides,
    system_avatar,
    isChatSaving,
    setExternalAbortController,
    baseChatReplace,
    depth_prompt_depth_default,
    loadItemizedPrompts,
    animation_duration,
    depth_prompt_role_default,
    shouldAutoContinue,
    unshallowCharacter,
    chatElement,
    ensureMessageMediaIsArray,
} from '../script.js';
import { printTagList, createTagMapFromList, applyTagsOnCharacterSelect, tag_map, applyTagsOnGroupSelect } from './tags.js';
import { FILTER_TYPES, FilterHelper } from './filters.js';
import { isExternalMediaAllowed } from './chats.js';
import { POPUP_TYPE, Popup, callGenericPopup } from './popup.js';
import { t } from './i18n.js';
import { accountStorage } from './util/AccountStorage.js';

export {
    selected_group,
    openGroupId,
    is_group_automode_enabled,
    hideMutedSprites,
    is_group_generating,
    group_generation_id,
    groups,
    saveGroupChat,
    generateGroupWrapper,
    deleteGroup,
    getGroupAvatar,
    getGroups,
    regenerateGroup,
    resetSelectedGroup,
    select_group_chats,
    getGroupChatNames,
};

let is_group_generating = false; // Group generation flag
let is_group_automode_enabled = false;
let hideMutedSprites = false;
let groups = [];
let selected_group = null;
let group_generation_id = null;
let fav_grp_checked = false;
let openGroupId = null;
let newGroupMembers = [];

export const group_activation_strategy = {
    NATURAL: 0,
    LIST: 1,
    MANUAL: 2,
    POOLED: 3,
};

export const group_generation_mode = {
    SWAP: 0,
    APPEND: 1,
    APPEND_DISABLED: 2,
};

export const DEFAULT_AUTO_MODE_DELAY = 5;

export const groupCandidatesFilter = new FilterHelper(debounce(printGroupCandidates, debounce_timeout.quick));
let autoModeWorker = null;
const saveGroupDebounced = debounce(async (group, reload) => await _save(group, reload), debounce_timeout.relaxed);
/** @type {Map<string, number>} */
let groupChatQueueOrder = new Map();

function setAutoModeWorker() {
    clearInterval(autoModeWorker);
    const autoModeDelay = groups.find(x => x.id === selected_group)?.auto_mode_delay ?? DEFAULT_AUTO_MODE_DELAY;
    autoModeWorker = setInterval(groupChatAutoModeWorker, autoModeDelay * 1000);
}

async function _save(group, reload = true) {
    await fetch('/api/groups/edit', {
        method: 'POST',
        headers: getRequestHeaders(),
        body: JSON.stringify(group),
    });
    if (reload) {
        await getCharacters();
    }
}

// Group chats
async function regenerateGroup() {
    let generationId = getLastMessageGenerationId();

    while (chat.length > 0) {
        const lastMes = chat[chat.length - 1];
        const this_generationId = lastMes.extra?.gen_id;

        // for new generations after the update
        if ((generationId && this_generationId) && generationId !== this_generationId) {
            break;
        }
        // legacy for generations before the update
        else if (lastMes.is_user || lastMes.is_system) {
            break;
        }

        await deleteLastMessage();
    }

    const abortController = new AbortController();
    setExternalAbortController(abortController);
    generateGroupWrapper(false, 'normal', { signal: abortController.signal });
}

async function loadGroupChat(chatId) {
    const response = await fetch('/api/chats/group/get', {
        method: 'POST',
        headers: getRequestHeaders(),
        body: JSON.stringify({ id: chatId }),
    });

    if (response.ok) {
        const data = await response.json();
        return data;
    }

    return [];
}

async function validateGroup(group) {
    if (!group) return;

    // Validate that all members exist as characters
    let dirty = false;
    group.members = group.members.filter(member => {
        const character = characters.find(x => x.avatar === member || x.name === member);
        if (!character) {
            const msg = t`Warning: Listed member ${member} does not exist as a character. It will be removed from the group.`;
            toastr.warning(msg, t`Group Validation`);
            console.warn(msg);
            dirty = true;
        }
        return character;
    });

    // Remove duplicate chat ids
    if (Array.isArray(group.chats)) {
        const lengthBefore = group.chats.length;
        group.chats = group.chats.filter(onlyUnique);
        const lengthAfter = group.chats.length;
        if (lengthBefore !== lengthAfter) {
            dirty = true;
        }
    }

    if (dirty) {
        await editGroup(group.id, true, false);
    }
}

export async function getGroupChat(groupId, reload = false) {
    const group = groups.find((x) => x.id === groupId);
    if (!group) {
        console.warn('Group not found', groupId);
        return;
    }

    // Run validation before any loading
    await validateGroup(group);
    await unshallowGroupMembers(groupId);

    const chat_id = group.chat_id;
    const data = await loadGroupChat(chat_id);
    const metadata = group.chat_metadata ?? {};
    const freshChat = !metadata.tainted && (!Array.isArray(data) || !data.length);

    await loadItemizedPrompts(getCurrentChatId());

    if (group && Array.isArray(group.members) && freshChat) {
        chat.splice(0, chat.length);
        chatElement.find('.mes').remove();
        for (let member of group.members) {
            const character = characters.find(x => x.avatar === member || x.name === member);
            if (!character) {
                continue;
            }

            const mes = await getFirstCharacterMessage(character);

            // No first message
            if (!(mes?.mes)) {
                continue;
            }

            chat.push(mes);
            await eventSource.emit(event_types.MESSAGE_RECEIVED, (chat.length - 1), 'first_message');
            addOneMessage(mes);
            await eventSource.emit(event_types.CHARACTER_MESSAGE_RENDERED, (chat.length - 1), 'first_message');
        }
        await saveGroupChat(groupId, false);
    } else if (Array.isArray(data) && data.length) {
        data[0].is_group = true;
        chat.splice(0, chat.length, ...data);
        chat.forEach(ensureMessageMediaIsArray);
        chatElement.find('.mes').remove();
        await printMessages();
    }

    updateChatMetadata(metadata, true);

    if (reload) {
        select_group_chats(groupId, true);
    }

    await eventSource.emit(event_types.CHAT_CHANGED, getCurrentChatId());
    if (freshChat) await eventSource.emit(event_types.GROUP_CHAT_CREATED);
}

/**
 * Retrieves the members of a group
 *
 * @param {string} [groupId=selected_group] - The ID of the group to retrieve members from. Defaults to the currently selected group.
 * @returns {import('../script.js').Character[]} An array of character objects representing the members of the group. If the group is not found, an empty array is returned.
 */
export function getGroupMembers(groupId = selected_group) {
    const group = groups.find((x) => x.id === groupId);
    return group?.members.map(member => characters.find(x => x.avatar === member)) ?? [];
}

/**
 * Retrieves the member names of a group. If the group is not selected, an empty array is returned.
 * @returns {string[]} An array of character names representing the members of the group.
 */
export function getGroupNames() {
    if (!selected_group) {
        return [];
    }
    const groupMembers = groups.find(x => x.id == selected_group)?.members;
    return Array.isArray(groupMembers)
        ? groupMembers.map(x => characters.find(y => y.avatar === x)?.name).filter(x => x)
        : [];
}

/**
 * Finds the character ID for a group member.
 * @param {number|string} arg 0-based member index or character name
 * @param {Boolean} full Whether to return a key-value object containing extra data
 * @returns {number|Object} 0-based character ID or key-value object if full is true
 */
export function findGroupMemberId(arg, full = false) {
    arg = arg?.toString()?.trim();

    if (!arg) {
        console.warn('WARN: No argument provided for findGroupMemberId');
        return;
    }

    const group = groups.find(x => x.id == selected_group);

    if (!group || !Array.isArray(group.members)) {
        console.warn('WARN: No group found for selected group ID');
        return;
    }

    const index = parseInt(arg);
    const searchByString = isNaN(index);

    if (searchByString) {
        const memberNames = group.members.map(x => ({
            avatar: x,
            name: characters.find(y => y.avatar === x)?.name,
            index: characters.findIndex(y => y.avatar === x),
        }));
        const fuse = new Fuse(memberNames, { keys: ['avatar', 'name'] });
        const result = fuse.search(arg);

        if (!result.length) {
            console.warn(`WARN: No group member found using string ${arg}`);
            return;
        }

        const chid = result[0].item.index;

        if (chid === -1) {
            console.warn(`WARN: No character found for group member ${arg}`);
            return;
        }

        console.log(`Targeting group member ${chid} (${arg}) from search result`, result[0]);

        return !full ? chid : { ...{ id: chid }, ...result[0].item };
    }
    else {
        const memberAvatar = group.members[index];

        if (memberAvatar === undefined) {
            console.warn(`WARN: No group member found at index ${index}`);
            return;
        }

        const chid = characters.findIndex(x => x.avatar === memberAvatar);

        if (chid === -1) {
            console.warn(`WARN: No character found for group member ${memberAvatar} at index ${index}`);
            return;
        }

        console.log(`Targeting group member ${memberAvatar} at index ${index}`);

        return !full ? chid : {
            id: chid,
            avatar: memberAvatar,
            name: characters.find(y => y.avatar === memberAvatar)?.name,
            index: index,
        };
    }
}

/**
 * Gets depth prompts for group members.
 * @param {string} groupId Group ID
 * @param {number} characterId Current Character ID
 * @returns {{depth: number, text: string, role: string}[]} Array of depth prompts
 */
export function getGroupDepthPrompts(groupId, characterId) {
    if (!groupId) {
        return [];
    }

    console.debug('getGroupDepthPrompts entered for group: ', groupId);
    const group = groups.find(x => x.id === groupId);

    if (!group || !Array.isArray(group.members) || !group.members.length) {
        return [];
    }

    if (group.generation_mode === group_generation_mode.SWAP) {
        return [];
    }

    const depthPrompts = [];

    for (const member of group.members) {
        const index = characters.findIndex(x => x.avatar === member);
        const character = characters[index];

        if (index === -1 || !character) {
            console.debug(`Skipping missing member: ${member}`);
            continue;
        }

        if (group.disabled_members.includes(member) && characterId !== index) {
            console.debug(`Skipping disabled group member: ${member}`);
            continue;
        }

        const depthPromptText = baseChatReplace(character.data?.extensions?.depth_prompt?.prompt?.trim(), name1, character.name) || '';
        const depthPromptDepth = character.data?.extensions?.depth_prompt?.depth ?? depth_prompt_depth_default;
        const depthPromptRole = character.data?.extensions?.depth_prompt?.role ?? depth_prompt_role_default;

        if (depthPromptText) {
            depthPrompts.push({ text: depthPromptText, depth: depthPromptDepth, role: depthPromptRole });
        }
    }

    return depthPrompts;
}

/**
 * Combines group members cards into a single string. Only for groups with generation mode set to APPEND or APPEND_DISABLED.
 * @param {string} groupId Group ID
 * @param {number} characterId Current Character ID
 * @returns {{description: string, personality: string, scenario: string, mesExamples: string}} Group character cards combined
 */
export function getGroupCharacterCards(groupId, characterId) {
    const group = groups.find(x => x.id === groupId);

    if (!group || !group?.generation_mode || !Array.isArray(group.members) || !group.members.length) {
        return null;
    }

    /**
     * Runs the macro engine on a text, with custom <FIELDNAME> replace
     * @param {string} value Value to replace
     * @param {string} fieldName Name of the field
     * @param {string} characterName Name of the character
     * @param {boolean} trim Whether to trim the value
     * @returns {string} Replaced text
     * */
    function customBaseChatReplace(value, fieldName, characterName, trim) {
        if (!value) {
            return '';
        }

        // We should do the custom field name replacement first, and then run it through the normal macro engine with provided names
        value = value.replace(/<FIELDNAME>/gi, fieldName);
        value = trim ? value.trim() : value;
        return baseChatReplace(value, name1, characterName);
    }

    /**
     * Prepares text with prefix/suffix for a character field
     * @param {string} value Value to replace
     * @param {string} characterName Name of the character
     * @param {string} fieldName Name of the field
     * @param {function(string): string} [preprocess] Preprocess function
     * @returns {string} Prepared text
     * */
    function replaceAndPrepareForJoin(value, characterName, fieldName, preprocess = null) {
        value = value.trim();
        if (!value) {
            return '';
        }

        // Run preprocess function
        if (typeof preprocess === 'function') {
            value = preprocess(value);
        }

        // Prepare and replace prefixes
        const prefix = customBaseChatReplace(group.generation_mode_join_prefix, fieldName, characterName, false);
        const suffix = customBaseChatReplace(group.generation_mode_join_suffix, fieldName, characterName, false);
        // Also run the macro replacement on the actual content
        value = customBaseChatReplace(value, fieldName, characterName, true);

        return `${prefix}${value}${suffix}`;
    }

    const scenarioOverride = String(chat_metadata['scenario'] || '');
    const mesExamplesOverride = String(chat_metadata['mes_example'] || '');

    let descriptions = [];
    let personalities = [];
    let scenarios = [];
    let mesExamplesArray = [];

    for (const member of group.members) {
        const index = characters.findIndex(x => x.avatar === member);
        const character = characters[index];

        if (index === -1 || !character) {
            console.debug(`Skipping missing member: ${member}`);
            continue;
        }

        if (group.disabled_members.includes(member) && characterId !== index && group.generation_mode !== group_generation_mode.APPEND_DISABLED) {
            continue;
        }

        descriptions.push(replaceAndPrepareForJoin(character.description, character.name, 'Description'));
        personalities.push(replaceAndPrepareForJoin(character.personality, character.name, 'Personality'));
        scenarios.push(replaceAndPrepareForJoin(character.scenario, character.name, 'Scenario'));
        mesExamplesArray.push(replaceAndPrepareForJoin(character.mes_example, character.name, 'Example Messages', (x) => !x.startsWith('<START>') ? `<START>\n${x}` : x));
    }

    const description = descriptions.filter(x => x.length).join('\n');
    const personality = personalities.filter(x => x.length).join('\n');
    const scenario = baseChatReplace(scenarioOverride?.trim(), name1, name2) || scenarios.filter(x => x.length).join('\n');
    const mesExamples = baseChatReplace(mesExamplesOverride?.trim(), name1, name2) || mesExamplesArray.filter(x => x.length).join('\n');

    return { description, personality, scenario, mesExamples };
}

async function getFirstCharacterMessage(character) {
    let messageText = character.first_mes;

    // if there are alternate greetings, pick one at random
    if (Array.isArray(character.data?.alternate_greetings)) {
        const messageTexts = [character.first_mes, ...character.data.alternate_greetings].filter(x => x);
        messageText = messageTexts[Math.floor(Math.random() * messageTexts.length)];
    }

    // Allow extensions to change the first message
    const eventArgs = { input: messageText, output: '', character: character };
    await eventSource.emit(event_types.CHARACTER_FIRST_MESSAGE_SELECTED, eventArgs);
    if (eventArgs.output) {
        messageText = eventArgs.output;
    }

    const mes = {};
    mes['is_user'] = false;
    mes['is_system'] = false;
    mes['name'] = character.name;
    mes['send_date'] = getMessageTimeStamp();
    mes['original_avatar'] = character.avatar;
    mes['extra'] = { 'gen_id': Date.now() * Math.random() * 1000000 };
    mes['mes'] = messageText
        ? substituteParams(messageText.trim(), name1, character.name)
        : '';
    mes['force_avatar'] =
        character.avatar != 'none'
            ? getThumbnailUrl('avatar', character.avatar)
            : default_avatar;
    return mes;
}

function resetSelectedGroup() {
    selected_group = null;
    is_group_generating = false;
}

async function saveGroupChat(groupId, shouldSaveGroup) {
    const group = groups.find(x => x.id == groupId);
    const chat_id = group.chat_id;
    group['date_last_chat'] = Date.now();
    const response = await fetch('/api/chats/group/save', {
        method: 'POST',
        headers: getRequestHeaders(),
        body: JSON.stringify({ id: chat_id, chat: [...chat] }),
    });

    if (!response.ok) {
        toastr.error(t`Check the server connection and reload the page to prevent data loss.`, t`Group Chat could not be saved`);
        console.error('Group chat could not be saved', response);
        return;
    }

    if (shouldSaveGroup) {
        await editGroup(groupId, false, false);
    }
}

export async function renameGroupMember(oldAvatar, newAvatar, newName) {
    // Scan every group for our renamed character
    for (const group of groups) {
        try {
            // Try finding the member by old avatar link
            const memberIndex = group.members.findIndex(x => x == oldAvatar);

            // Character was not present in the group...
            if (memberIndex == -1) {
                continue;
            }

            // Replace group member avatar id and save the changes
            group.members[memberIndex] = newAvatar;
            await editGroup(group.id, true, false);
            console.log(`Renamed character ${newName} in group: ${group.name}`);

            // Load all chats from this group
            for (const chatId of group.chats) {
                const messages = await loadGroupChat(chatId);

                // Only save the chat if there were any changes to the chat content
                let hadChanges = false;
                // Chat shouldn't be empty
                if (Array.isArray(messages) && messages.length) {
                    // Iterate over every chat message
                    for (const message of messages) {
                        // Only look at character messages
                        if (message.is_user || message.is_system) {
                            continue;
                        }

                        // Message belonged to the old-named character:
                        // Update name, avatar thumbnail URL and original avatar link
                        if (message.force_avatar && message.force_avatar.indexOf(encodeURIComponent(oldAvatar)) !== -1) {
                            message.name = newName;
                            message.force_avatar = message.force_avatar.replace(encodeURIComponent(oldAvatar), encodeURIComponent(newAvatar));
                            message.original_avatar = newAvatar;
                            hadChanges = true;
                        }
                    }

                    if (hadChanges) {
                        const saveChatResponse = await fetch('/api/chats/group/save', {
                            method: 'POST',
                            headers: getRequestHeaders(),
                            body: JSON.stringify({ id: chatId, chat: [...messages] }),
                        });

                        if (!saveChatResponse.ok) {
                            throw new Error('Group member could not be renamed');
                        }

                        console.log(`Renamed character ${newName} in group chat: ${chatId}`);
                    }
                }
            }
        }
        catch (error) {
            console.log(`An error during renaming the character ${newName} in group: ${group.name}`);
            console.error(error);
        }
    }
}

async function getGroups() {
    const response = await fetch('/api/groups/all', {
        method: 'POST',
        headers: getRequestHeaders(),
    });

    if (response.ok) {
        const data = await response.json();
        groups = data.sort((a, b) => a.id - b.id);

        // Convert groups to new format
        for (const group of groups) {
            if (typeof group.id === 'number') {
                group.id = String(group.id);
            }
            if (group.disabled_members == undefined) {
                group.disabled_members = [];
            }
            if (group.chat_id == undefined) {
                group.chat_id = group.id;
                group.chats = [group.id];
                group.members = group.members
                    .map(x => characters.find(y => y.name == x)?.avatar)
                    .filter(x => x)
                    .filter(onlyUnique);
            }
            if (group.past_metadata == undefined) {
                group.past_metadata = {};
            }
            if (typeof group.chat_id === 'number') {
                group.chat_id = String(group.chat_id);
            }
            if (Array.isArray(group.chats) && group.chats.some(x => typeof x === 'number')) {
                group.chats = group.chats.map(x => String(x));
            }
        }
    }
}

export function getGroupBlock(group) {
    let count = 0;
    let namesList = [];

    // Build inline name list
    if (Array.isArray(group.members) && group.members.length) {
        for (const member of group.members) {
            const character = characters.find(x => x.avatar === member || x.name === member);
            if (character) {
                namesList.push(character.name);
                count++;
            }
        }
    }

    const template = $('#group_list_template .group_select').clone();
    template.data('id', group.id);
    template.attr('data-grid', group.id);
    template.find('.ch_name').text(group.name).attr('title', `[Group] ${group.name}`);
    template.find('.group_fav_icon').css('display', 'none');
    template.addClass(group.fav ? 'is_fav' : '');
    template.find('.ch_fav').val(group.fav);
    template.find('.group_select_counter').text(count + ' ' + (count != 1 ? t`characters` : t`character`));
    template.find('.group_select_block_list').text(namesList.join(', '));

    // Display inline tags
    const tagsElement = template.find('.tags');
    printTagList(tagsElement, { forEntityOrKey: group.id, tagOptions: { isCharacterList: true } });

    const avatar = getGroupAvatar(group);
    if (avatar) {
        $(template).find('.avatar').replaceWith(avatar);
    }

    return template;
}

function updateGroupAvatar(group) {
    $('#group_avatar_preview').empty().append(getGroupAvatar(group));

    $('.group_select').each(function () {
        if ($(this).data('id') == group.id) {
            $(this).find('.avatar').replaceWith(getGroupAvatar(group));
        }
    });

    favsToHotswap();
}

// check if isDataURLor if it's a valid local file url
function isValidImageUrl(url) {
    // check if empty dict
    if (Object.keys(url).length === 0) {
        return false;
    }
    return isDataURL(url) || (url && (url.startsWith('user') || url.startsWith('/user')));
}

function getGroupAvatar(group) {
    if (!group) {
        return $(`<div class="avatar"><img src="${default_avatar}"></div>`);
    }
    // if isDataURL or if it's a valid local file url
    if (isValidImageUrl(group.avatar_url)) {
        return $(`<div class="avatar" title="[Group] ${group.name}"><img src="${group.avatar_url}"></div>`);
    }

    const memberAvatars = [];
    if (group && Array.isArray(group.members) && group.members.length) {
        for (const member of group.members) {
            const charIndex = characters.findIndex(x => x.avatar === member);
            if (charIndex !== -1 && characters[charIndex].avatar !== 'none') {
                const avatar = getThumbnailUrl('avatar', characters[charIndex].avatar);
                memberAvatars.push(avatar);
            }
            if (memberAvatars.length === 4) {
                break;
            }
        }
    }

    const avatarCount = memberAvatars.length;

    if (avatarCount >= 1 && avatarCount <= 4) {
        const groupAvatar = $(`#group_avatars_template .collage_${avatarCount}`).clone();

        for (let i = 0; i < avatarCount; i++) {
            groupAvatar.find(`.img_${i + 1}`).attr('src', memberAvatars[i]);
        }

        groupAvatar.attr('title', `[Group] ${group.name}`);
        return groupAvatar;
    }

    // catch edge case where group had one member and that member is deleted
    if (avatarCount === 0) {
        return $('<div class="missing-avatar fa-solid fa-user-slash"></div>');
    }

    // default avatar
    const groupAvatar = $('#group_avatars_template .collage_1').clone();
    groupAvatar.find('.img_1').attr('src', group.avatar_url || system_avatar);
    groupAvatar.attr('title', `[Group] ${group.name}`);
    return groupAvatar;
}

function getGroupChatNames(groupId) {
    const group = groups.find(x => x.id === groupId);

    if (!group) {
        return [];
    }

    const names = [];
    for (const chatId of group.chats) {
        names.push(chatId);
    }
    return names;
}

async function generateGroupWrapper(by_auto_mode, type = null, params = {}) {
    function throwIfAborted() {
        if (params.signal instanceof AbortSignal && params.signal.aborted) {
            throw new Error('AbortSignal was fired. Group generation stopped');
        }
    }

    if (online_status === 'no_connection') {
        is_group_generating = false;
        setSendButtonState(false);
        return Promise.resolve();
    }

    if (is_group_generating) {
        return Promise.resolve();
    }

    // Auto-navigate back to group menu
    if (menu_type !== 'group_edit') {
        select_group_chats(selected_group);
        await delay(1);
    }

    /** @type {any} Caution: JS war crimes ahead */
    let textResult = '';
    const group = groups.find((x) => x.id === selected_group);

    if (!group || !Array.isArray(group.members) || !group.members.length) {
        sendSystemMessage(system_message_types.EMPTY, '', { isSmallSys: true });
        return Promise.resolve();
    }

    try {
        await unshallowGroupMembers(selected_group);

        throwIfAborted();
        hideSwipeButtons();
        is_group_generating = true;
        setCharacterName('');
        setCharacterId(undefined);
        const userInput = String($('#send_textarea').val());

        // id of this specific batch for regeneration purposes
        group_generation_id = Date.now();
        const lastMessage = chat[chat.length - 1];
        let activationText = '';
        let isUserInput = false;

        if (userInput?.length && !by_auto_mode) {
            isUserInput = true;
            activationText = userInput;
        } else {
            if (lastMessage && !lastMessage.is_system) {
                activationText = lastMessage.mes;
            }
        }

        const activationStrategy = Number(group.activation_strategy ?? group_activation_strategy.NATURAL);
        const enabledMembers = group.members.filter(x => !group.disabled_members.includes(x));
        let activatedMembers = [];

        if (params && typeof params.force_chid == 'number') {
            activatedMembers = [params.force_chid];
        } else if (type === 'quiet') {
            activatedMembers = activateSwipe(group.members, { allowSystem: true }).slice(0, 1);

            if (activatedMembers.length === 0) {
                activatedMembers = activateListOrder(group.members.slice(0, 1));
            }
        }
        else if (type === 'swipe' || type === 'continue') {
            activatedMembers = activateSwipe(group.members, { allowSystem: false });

            if (activatedMembers.length === 0) {
                toastr.warning(t`Deleted group member swiped. To get a reply, add them back to the group.`);
                throw new Error('Deleted group member swiped');
            }
        }
        else if (type === 'impersonate') {
            activatedMembers = activateImpersonate(group.members);
        }
        else if (activationStrategy === group_activation_strategy.NATURAL) {
            activatedMembers = activateNaturalOrder(enabledMembers, activationText, lastMessage, group.allow_self_responses, isUserInput);
        }
        else if (activationStrategy === group_activation_strategy.LIST) {
            activatedMembers = activateListOrder(enabledMembers);
        }
        else if (activationStrategy === group_activation_strategy.POOLED) {
            activatedMembers = activatePooledOrder(enabledMembers, lastMessage, isUserInput);
        }
        else if (activationStrategy === group_activation_strategy.MANUAL && !isUserInput) {
            activatedMembers = shuffle(enabledMembers).slice(0, 1).map(x => characters.findIndex(y => y.avatar === x)).filter(x => x !== -1);
        }

        if (activatedMembers.length === 0) {
            //toastr.warning('All group members are disabled. Enable at least one to get a reply.');

            // Send user message as is
            const bias = getBiasStrings(userInput, type);
            await sendMessageAsUser(userInput, bias.messageBias);
            await saveChatConditional();
            $('#send_textarea').val('')[0].dispatchEvent(new Event('input', { bubbles: true }));
        }
        groupChatQueueOrder = new Map();

        if (power_user.show_group_chat_queue) {
            for (let i = 0; i < activatedMembers.length; ++i) {
                groupChatQueueOrder.set(characters[activatedMembers[i]].avatar, i + 1);
            }
        }
        await eventSource.emit(event_types.GROUP_WRAPPER_STARTED, { selected_group, type });
        // now the real generation begins: cycle through every activated character
        for (const chId of activatedMembers) {
            throwIfAborted();
            deactivateSendButtons();
            setCharacterId(chId);
            setCharacterName(characters[chId].name);
            if (power_user.show_group_chat_queue) {
                printGroupMembers();
            }
            await eventSource.emit(event_types.GROUP_MEMBER_DRAFTED, chId);

            // Wait for generation to finish
            const generateType = ['swipe', 'impersonate', 'quiet', 'continue'].includes(type) ? type : 'normal';
            textResult = await Generate(generateType, { automatic_trigger: by_auto_mode, ...(params || {}) });
            let messageChunk = textResult?.messageChunk;

            if (messageChunk) {
                while (shouldAutoContinue(messageChunk, type === 'impersonate')) {
                    textResult = await Generate('continue', { automatic_trigger: by_auto_mode, ...(params || {}) });
                    messageChunk = textResult?.messageChunk;
                }
            }
            if (power_user.show_group_chat_queue) {
                groupChatQueueOrder.delete(characters[chId].avatar);
                groupChatQueueOrder.forEach((value, key, map) => map.set(key, value - 1));
            }
        }
    } finally {
        is_group_generating = false;
        setSendButtonState(false);
        setCharacterId(undefined);
        if (power_user.show_group_chat_queue) {
            groupChatQueueOrder = new Map();
            printGroupMembers();
        }
        setCharacterName('');
        activateSendButtons();
        showSwipeButtons();
        await eventSource.emit(event_types.GROUP_WRAPPER_FINISHED, { selected_group, type });
    }

    return Promise.resolve(textResult);
}

function getLastMessageGenerationId() {
    let generationId = null;
    if (chat.length > 0) {
        const lastMes = chat[chat.length - 1];
        if (!lastMes.is_user && !lastMes.is_system && lastMes.extra) {
            generationId = lastMes.extra.gen_id;
        }
    }
    return generationId;
}

function activateImpersonate(members) {
    const randomIndex = Math.floor(Math.random() * members.length);
    const activatedMembers = [members[randomIndex]];
    const memberIds = activatedMembers
        .map((x) => characters.findIndex((y) => y.avatar === x))
        .filter((x) => x !== -1);
    return memberIds;
}

/**
 * Activates a group member based on the last message.
 * @param {string[]} members Array of group member avatar ids
 * @param {Object} [options] Options object
 * @param {boolean} [options.allowSystem] Whether to allow system messages
 * @returns {number[]} Array of character ids
 */
function activateSwipe(members, { allowSystem = false } = {}) {
    let activatedNames = [];
    const lastMessage = chat[chat.length - 1];

    if (!lastMessage) {
        return [];
    }

    if (lastMessage.is_user || (!allowSystem && lastMessage.is_system) || lastMessage.extra?.type === system_message_types.NARRATOR) {
        for (const message of chat.slice().reverse()) {
            if (message.is_user || (!allowSystem && message.is_system) || message.extra?.type === system_message_types.NARRATOR) {
                continue;
            }

            if (message.original_avatar) {
                activatedNames.push(message.original_avatar);
                break;
            }
        }

        if (activatedNames.length === 0) {
            activatedNames.push(shuffle(members.slice())[0]);
        }
    }

    // pre-update group chat swipe
    if (!lastMessage.original_avatar) {
        const matches = characters.filter(x => x.name == lastMessage.name);

        for (const match of matches) {
            if (members.includes(match.avatar)) {
                activatedNames.push(match.avatar);
                break;
            }
        }
    }
    else {
        activatedNames.push(lastMessage.original_avatar);
    }

    const memberIds = activatedNames
        .map((x) => characters.findIndex((y) => y.avatar === x))
        .filter((x) => x !== -1);
    return memberIds;
}

function activateListOrder(members) {
    let activatedMembers = members.filter(onlyUnique);

    // map to character ids
    const memberIds = activatedMembers
        .map((x) => characters.findIndex((y) => y.avatar === x))
        .filter((x) => x !== -1);
    return memberIds;
}

/**
 * Activate group members based on the last message.
 * @param {string[]} members List of member avatars
 * @param {Object} lastMessage Last message
 * @param {boolean} isUserInput Whether the user has input text
 * @returns {number[]} List of character ids
 */
function activatePooledOrder(members, lastMessage, isUserInput) {
    /** @type {string} */
    let activatedMember = null;
    /** @type {string[]} */
    const spokenSinceUser = [];

    for (const message of chat.slice().reverse()) {
        if (message.is_user || isUserInput) {
            break;
        }

        if (message.is_system || message.extra?.type === system_message_types.NARRATOR) {
            continue;
        }

        if (message.original_avatar) {
            spokenSinceUser.push(message.original_avatar);
        }
    }

    const haveNotSpoken = members.filter(x => !spokenSinceUser.includes(x));

    if (haveNotSpoken.length) {
        activatedMember = haveNotSpoken[Math.floor(Math.random() * haveNotSpoken.length)];
    }

    if (activatedMember === null) {
        const lastMessageAvatar = members.length > 1 && lastMessage && !lastMessage.is_user && lastMessage.original_avatar;
        const randomPool = lastMessageAvatar ? members.filter(x => x !== lastMessage.original_avatar) : members;
        activatedMember = randomPool[Math.floor(Math.random() * randomPool.length)];
    }

    const memberId = characters.findIndex(y => y.avatar === activatedMember);
    return memberId !== -1 ? [memberId] : [];
}

function activateNaturalOrder(members, input, lastMessage, allowSelfResponses, isUserInput) {
    let activatedMembers = [];

    // prevents the same character from speaking twice
    let bannedUser = !isUserInput && lastMessage && !lastMessage.is_user && lastMessage.name;

    // ...unless allowed to do so
    if (allowSelfResponses) {
        bannedUser = undefined;
    }

    // find mentions (excluding self)
    if (input && input.length) {
        for (let inputWord of extractAllWords(input)) {
            for (let member of members) {
                const character = characters.find(x => x.avatar === member);

                if (!character || character.name === bannedUser) {
                    continue;
                }

                if (extractAllWords(character.name).includes(inputWord)) {
                    activatedMembers.push(member);
                    break;
                }
            }
        }
    }

    const chattyMembers = [];
    // activation by talkativeness (in shuffled order, except banned)
    const shuffledMembers = shuffle([...members]);
    for (let member of shuffledMembers) {
        const character = characters.find((x) => x.avatar === member);

        if (!character || character.name === bannedUser) {
            continue;
        }

        const rollValue = Math.random();
        const talkativeness = isNaN(character.talkativeness)
            ? talkativeness_default
            : Number(character.talkativeness);
        if (talkativeness >= rollValue) {
            activatedMembers.push(member);
        }
        if (talkativeness > 0) {
            chattyMembers.push(member);
        }
    }

    // pick 1 at random if no one was activated
    let retries = 0;
    // try to limit the selected random character to those with talkativeness > 0
    const randomPool = chattyMembers.length > 0 ? chattyMembers : members;
    while (activatedMembers.length === 0 && ++retries <= randomPool.length) {
        const randomIndex = Math.floor(Math.random() * randomPool.length);
        const character = characters.find((x) => x.avatar === randomPool[randomIndex]);

        if (!character) {
            continue;
        }

        activatedMembers.push(randomPool[randomIndex]);
    }

    // de-duplicate array of character avatars
    activatedMembers = activatedMembers.filter(onlyUnique);

    // map to character ids
    const memberIds = activatedMembers
        .map((x) => characters.findIndex((y) => y.avatar === x))
        .filter((x) => x !== -1);
    return memberIds;
}

async function deleteGroup(id) {
    const group = groups.find((x) => x.id === id);

    const response = await fetch('/api/groups/delete', {
        method: 'POST',
        headers: getRequestHeaders(),
        body: JSON.stringify({ id: id }),
    });

    if (group && Array.isArray(group.chats)) {
        for (const chatId of group.chats) {
            await eventSource.emit(event_types.GROUP_CHAT_DELETED, chatId);
        }
    }

    if (response.ok) {
        await clearChat();
        selected_group = null;
        delete tag_map[id];
        resetChatState();
        await printMessages();
        await getCharacters();

        select_rm_info('group_delete', id);

        $('#rm_button_selected_ch').children('h2').text('');
    }
}

export async function editGroup(id, immediately, reload = true) {
    let group = groups.find((x) => x.id === id);

    if (!group) {
        return;
    }

    if (id === selected_group) {
        // structuredClone may cause issues if metadata has non-cloneable references
        group['chat_metadata'] = JSON.parse(JSON.stringify(chat_metadata));
    }

    if (immediately) {
        return await _save(group, reload);
    }

    saveGroupDebounced(group, reload);
}

/**
 * Unshallows all definitions of group members.
 * @param {string} groupId Id of the group
 * @returns {Promise<void>} Promise that resolves when all group members are unshallowed
 */
export async function unshallowGroupMembers(groupId) {
    const group = groups.find(x => x.id == groupId);
    if (!group) {
        return;
    }
    const members = group.members;
    if (!Array.isArray(members)) {
        return;
    }
    for (const member of members) {
        const index = characters.findIndex(x => x.avatar === member);
        if (index === -1) {
            continue;
        }
        await unshallowCharacter(String(index));
    }
}

let groupAutoModeAbortController = null;

async function groupChatAutoModeWorker() {
    if (!is_group_automode_enabled || online_status === 'no_connection') {
        return;
    }

    if (!selected_group || is_send_press || is_group_generating) {
        return;
    }

    const group = groups.find((x) => x.id === selected_group);

    if (!group || !Array.isArray(group.members) || !group.members.length) {
        return;
    }

    groupAutoModeAbortController = new AbortController();
    await generateGroupWrapper(true, 'auto', { signal: groupAutoModeAbortController.signal });
}

async function modifyGroupMember(groupId, groupMember, isDelete) {
    const id = groupMember.data('id');
    const thisGroup = groups.find((x) => x.id == groupId);
    const membersArray = thisGroup?.members ?? newGroupMembers;

    if (isDelete) {
        const index = membersArray.findIndex((x) => x === id);
        if (index !== -1) {
            membersArray.splice(membersArray.indexOf(id), 1);
        }
    } else {
        membersArray.unshift(id);
    }

    if (openGroupId) {
        await unshallowGroupMembers(openGroupId);
        await editGroup(openGroupId, false, false);
        updateGroupAvatar(thisGroup);
    }

    printGroupCandidates();
    printGroupMembers();

    const groupHasMembers = getGroupCharacters({ doFilter: false, onlyMembers: true }).length > 0;
    $('#rm_group_submit').prop('disabled', !groupHasMembers);
}

async function reorderGroupMember(chat_id, groupMember, direction) {
    const id = groupMember.data('id');
    const thisGroup = groups.find((x) => x.id == chat_id);
    const memberArray = thisGroup?.members ?? newGroupMembers;

    const indexOf = memberArray.indexOf(id);
    if (direction == 'down') {
        const next = memberArray[indexOf + 1];
        if (next) {
            memberArray[indexOf + 1] = memberArray[indexOf];
            memberArray[indexOf] = next;
        }
    }
    if (direction == 'up') {
        const prev = memberArray[indexOf - 1];
        if (prev) {
            memberArray[indexOf - 1] = memberArray[indexOf];
            memberArray[indexOf] = prev;
        }
    }

    printGroupMembers();

    // Existing groups need to modify members list
    if (openGroupId) {
        await editGroup(chat_id, false, false);
        updateGroupAvatar(thisGroup);
    }
}

async function onGroupActivationStrategyInput(e) {
    if (openGroupId) {
        let _thisGroup = groups.find((x) => x.id == openGroupId);
        _thisGroup.activation_strategy = Number(e.target.value);
        await editGroup(openGroupId, false, false);
    }
}

async function onGroupGenerationModeInput(e) {
    if (openGroupId) {
        let _thisGroup = groups.find((x) => x.id == openGroupId);
        _thisGroup.generation_mode = Number(e.target.value);
        await editGroup(openGroupId, false, false);

        toggleHiddenControls(_thisGroup);
    }
}

async function onGroupAutoModeDelayInput(e) {
    if (openGroupId) {
        let _thisGroup = groups.find((x) => x.id == openGroupId);
        _thisGroup.auto_mode_delay = Number(e.target.value);
        await editGroup(openGroupId, false, false);
        setAutoModeWorker();
    }
}

async function onGroupGenerationModeTemplateInput(e) {
    if (openGroupId) {
        let _thisGroup = groups.find((x) => x.id == openGroupId);
        const prop = $(e.target).attr('setting');
        _thisGroup[prop] = String(e.target.value);
        await editGroup(openGroupId, false, false);
    }
}

async function onGroupNameInput() {
    if (openGroupId) {
        let _thisGroup = groups.find((x) => x.id == openGroupId);
        _thisGroup.name = $(this).val();
        $('#rm_button_selected_ch').children('h2').text(_thisGroup.name);
        await editGroup(openGroupId);
    }
}

function isGroupMember(group, avatarId) {
    if (group && Array.isArray(group.members)) {
        return group.members.includes(avatarId);
    } else {
        return newGroupMembers.includes(avatarId);
    }
}

function getGroupCharacters({ doFilter = false, onlyMembers = false } = {}) {
    function sortMembersFn(a, b) {
        const membersArray = thisGroup?.members ?? newGroupMembers;
        const aIndex = membersArray.indexOf(a.item.avatar);
        const bIndex = membersArray.indexOf(b.item.avatar);
        return aIndex - bIndex;
    }

    const thisGroup = openGroupId && groups.find((x) => x.id == openGroupId);
    let candidates = characters
        .filter((x) => isGroupMember(thisGroup, x.avatar) == onlyMembers)
        .map((x) => ({ item: x, id: characters.indexOf(x), type: 'character' }));

    if (doFilter) {
        candidates = groupCandidatesFilter.applyFilters(candidates);
    }

    if (onlyMembers) {
        candidates.sort(sortMembersFn);
    } else {
        const useFilterOrder = doFilter && !!$('#rm_group_filter').val();
        sortEntitiesList(candidates, useFilterOrder, groupCandidatesFilter);
    }

    groupCandidatesFilter.clearFuzzySearchCaches();
    return candidates;
}

function printGroupCandidates() {
    const storageKey = 'GroupCandidates_PerPage';
    const pageSize = Number(accountStorage.getItem(storageKey)) || 5;
    const sizeChangerOptions = [5, 10, 25, 50, 100, 200, 500, 1000];
    $('#rm_group_add_members_pagination').pagination({
        dataSource: getGroupCharacters({ doFilter: true, onlyMembers: false }),
        pageRange: 1,
        position: 'top',
        showPageNumbers: false,
        prevText: '<',
        nextText: '>',
        formatNavigator: PAGINATION_TEMPLATE,
        formatSizeChanger: renderPaginationDropdown(pageSize, sizeChangerOptions),
        showNavigator: true,
        showSizeChanger: true,
        pageSize,
        afterSizeSelectorChange: function (e, size) {
            accountStorage.setItem(storageKey, e.target.value);
            paginationDropdownChangeHandler(e, size);
        },
        callback: function (data) {
            $('#rm_group_add_members').empty();
            for (const i of data) {
                $('#rm_group_add_members').append(getGroupCharacterBlock(i.item));
            }
            localizePagination($('#rm_group_add_members_pagination'));
        },
    });
}

function printGroupMembers() {
    const storageKey = 'GroupMembers_PerPage';
    $('.rm_group_members_pagination').each(function () {
        let that = this;
        const pageSize = Number(accountStorage.getItem(storageKey)) || 5;
        const sizeChangerOptions = [5, 10, 25, 50, 100, 200, 500, 1000];
        $(this).pagination({
            dataSource: getGroupCharacters({ doFilter: false, onlyMembers: true }),
            pageRange: 1,
            position: 'top',
            showPageNumbers: false,
            prevText: '<',
            nextText: '>',
            formatNavigator: PAGINATION_TEMPLATE,
            showNavigator: true,
            showSizeChanger: true,
            formatSizeChanger: renderPaginationDropdown(pageSize, sizeChangerOptions),
            pageSize,
            afterSizeSelectorChange: function (e, size) {
                accountStorage.setItem(storageKey, e.target.value);
                paginationDropdownChangeHandler(e, size);
            },
            callback: function (data) {
                $('.rm_group_members').empty();
                for (const i of data) {
                    $('.rm_group_members').append(getGroupCharacterBlock(i.item));
                }
                localizePagination($(that));
            },
        });
    });
}

function getGroupCharacterBlock(character) {
    const avatar = getThumbnailUrl('avatar', character.avatar);
    const template = $('#group_member_template .group_member').clone();
    const isFav = character.fav || character.fav == 'true';
    template.data('id', character.avatar);
    template.find('.avatar img').attr({ 'src': avatar, 'title': character.avatar });
    template.find('.ch_name').text(character.name);
    template.attr('data-chid', characters.indexOf(character));
    template.find('.ch_fav').val(isFav);
    template.toggleClass('is_fav', isFav);

    const auxFieldName = power_user.aux_field || 'character_version';
    const auxFieldValue = (character.data && character.data[auxFieldName]) || '';
    if (auxFieldValue) {
        template.find('.character_version').text(auxFieldValue);
    }
    else {
        template.find('.character_version').hide();
    }

    let queuePosition = groupChatQueueOrder.get(character.avatar);
    if (queuePosition) {
        template.find('.queue_position').text(queuePosition);
        template.toggleClass('is_queued', queuePosition > 1);
        template.toggleClass('is_active', queuePosition === 1);
    }

    template.toggleClass('disabled', isGroupMemberDisabled(character.avatar));

    // Display inline tags
    const tagsElement = template.find('.tags');
    printTagList(tagsElement, { forEntityOrKey: characters.indexOf(character), tagOptions: { isCharacterList: true } });

    if (!openGroupId) {
        template.find('[data-action="speak"]').hide();
        template.find('[data-action="enable"]').hide();
        template.find('[data-action="disable"]').hide();
    }

    return template;
}

function isGroupMemberDisabled(avatarId) {
    const thisGroup = openGroupId && groups.find((x) => x.id == openGroupId);
    return Boolean(thisGroup && thisGroup.disabled_members.includes(avatarId));
}

async function onDeleteGroupClick() {
    if (!openGroupId) {
        toastr.warning(t`Currently no group selected.`);
        return;
    }
    if (is_group_generating) {
        toastr.warning(t`Not so fast! Wait for the characters to stop typing before deleting the group.`);
        return;
    }

    const confirm = await Popup.show.confirm(t`Delete the group?`, '<p>' + t`This will also delete all your chats with that group. If you want to delete a single conversation, select a "View past chats" option in the lower left menu.` + '</p>');
    if (confirm) {
        deleteGroup(openGroupId);
    }
}

async function onFavoriteGroupClick() {
    updateFavButtonState(!fav_grp_checked);
    if (openGroupId) {
        let _thisGroup = groups.find((x) => x.id == openGroupId);
        _thisGroup.fav = fav_grp_checked;
        await editGroup(openGroupId, false, false);
        favsToHotswap();
    }
}

async function onGroupSelfResponsesClick() {
    if (openGroupId) {
        let _thisGroup = groups.find((x) => x.id == openGroupId);
        const value = $(this).prop('checked');
        _thisGroup.allow_self_responses = value;
        await editGroup(openGroupId, false, false);
    }
}

async function onHideMutedSpritesClick(value) {
    if (openGroupId) {
        let _thisGroup = groups.find((x) => x.id == openGroupId);
        _thisGroup.hideMutedSprites = value;
        console.log(`_thisGroup.hideMutedSprites = ${_thisGroup.hideMutedSprites}`);
        await editGroup(openGroupId, false, false);
        await eventSource.emit(event_types.GROUP_UPDATED);
    }
}

function toggleHiddenControls(group, generationMode = null) {
    const isJoin = [group_generation_mode.APPEND, group_generation_mode.APPEND_DISABLED].includes(generationMode ?? group?.generation_mode);
    $('#rm_group_generation_mode_join_prefix').parent().toggle(isJoin);
    $('#rm_group_generation_mode_join_suffix').parent().toggle(isJoin);

    if (!CSS.supports('field-sizing', 'content')) {
        initScrollHeight($('#rm_group_generation_mode_join_prefix'));
        initScrollHeight($('#rm_group_generation_mode_join_suffix'));
    }
}

function select_group_chats(groupId, skipAnimation) {
    openGroupId = groupId;
    newGroupMembers = [];
    const group = openGroupId && groups.find((x) => x.id == openGroupId);
    const groupName = group?.name ?? '';
    const replyStrategy = Number(group?.activation_strategy ?? group_activation_strategy.NATURAL);
    const generationMode = Number(group?.generation_mode ?? group_generation_mode.SWAP);

    setMenuType(group ? 'group_edit' : 'group_create');
    $('#group_avatar_preview').empty().append(getGroupAvatar(group));
    $('#rm_group_restore_avatar').toggle(!!group && isValidImageUrl(group.avatar_url));
    $('#rm_group_filter').val('').trigger('input');
    $('#rm_group_activation_strategy').val(replyStrategy);
    $(`#rm_group_activation_strategy option[value="${replyStrategy}"]`).prop('selected', true);
    $('#rm_group_generation_mode').val(generationMode);
    $(`#rm_group_generation_mode option[value="${generationMode}"]`).prop('selected', true);
    $('#rm_group_chat_name').val(groupName);

    if (!skipAnimation) {
        selectRightMenuWithAnimation('rm_group_chats_block');
    }

    // render tags
    applyTagsOnGroupSelect(groupId);

    // render characters list
    printGroupCandidates();
    printGroupMembers();

    const groupHasMembers = !!$('#rm_group_members').children().length;
    $('#rm_group_submit').prop('disabled', !groupHasMembers);
    $('#rm_group_allow_self_responses').prop('checked', group && group.allow_self_responses);
    $('#rm_group_hidemutedsprites').prop('checked', group && group.hideMutedSprites);
    $('#rm_group_automode_delay').val(group?.auto_mode_delay ?? DEFAULT_AUTO_MODE_DELAY);

    $('#rm_group_generation_mode_join_prefix').val(group?.generation_mode_join_prefix ?? '').attr('setting', 'generation_mode_join_prefix');
    $('#rm_group_generation_mode_join_suffix').val(group?.generation_mode_join_suffix ?? '').attr('setting', 'generation_mode_join_suffix');
    toggleHiddenControls(group, generationMode);

    // bottom buttons
    if (openGroupId) {
        $('#rm_group_submit').hide();
        $('#rm_group_delete').show();
        $('#rm_group_scenario').show();
        $('#group-metadata-controls .chat_lorebook_button').removeClass('disabled').prop('disabled', false);
        $('#group_open_media_overrides').show();
        const isMediaAllowed = isExternalMediaAllowed();
        $('#group_media_allowed_icon').toggle(isMediaAllowed);
        $('#group_media_forbidden_icon').toggle(!isMediaAllowed);
    } else {
        $('#rm_group_submit').show();
        if ($('#groupAddMemberListToggle .inline-drawer-content').css('display') !== 'block') {
            $('#groupAddMemberListToggle').trigger('click');
        }
        $('#rm_group_delete').hide();
        $('#rm_group_scenario').hide();
        $('#group-metadata-controls .chat_lorebook_button').addClass('disabled').prop('disabled', true);
        $('#group_open_media_overrides').hide();
    }

    updateFavButtonState(group?.fav ?? false);
    setAutoModeWorker();

    // top bar
    if (group) {
        $('#rm_group_automode_label').show();
        $('#rm_button_selected_ch').children('h2').text(groupName);
    }
    else {
        $('#rm_group_automode_label').hide();
    }

    // Toggle textbox sizes, as input events have not fired here
    if (!CSS.supports('field-sizing', 'content')) {
        $('#rm_group_chats_block .autoSetHeight').each(element => {
            resetScrollHeight(element);
        });
    }

    hideMutedSprites = group?.hideMutedSprites ?? false;
    $('#rm_group_hidemutedsprites').prop('checked', hideMutedSprites);

    eventSource.emit('groupSelected', { detail: { id: openGroupId, group: group } });
}

/**
 * Handles the upload and processing of a group avatar.
 * The selected image is read, cropped using a popup, processed into a thumbnail,
 * and then uploaded to the server.
 *
 * @param {Event} event - The event triggered by selecting a file input, containing the image file to upload.
 *
 * @returns {Promise<void>} - A promise that resolves when the processing and upload is complete.
 */
async function uploadGroupAvatar(event) {
    if (!(event.target instanceof HTMLInputElement) || !event.target.files.length) {
        return;
    }

    const file = event.target.files[0];

    if (!file) {
        return;
    }

    const result = await getBase64Async(file);

    $('#dialogue_popup').addClass('large_dialogue_popup wide_dialogue_popup');

    const croppedImage = await callGenericPopup('Set the crop position of the avatar image', POPUP_TYPE.CROP, '', { cropImage: result });

    if (!croppedImage) {
        return;
    }

    let thumbnail = await createThumbnail(String(croppedImage), 200, 300);
    //remove data:image/whatever;base64
    thumbnail = thumbnail.replace(/^data:image\/[a-z]+;base64,/, '');
    let _thisGroup = groups.find((x) => x.id == openGroupId);
    // filename should be group id + human readable timestamp
    const filename = _thisGroup ? `${_thisGroup.id}_${humanizedDateTime()}` : humanizedDateTime();
    let thumbnailUrl = await saveBase64AsFile(thumbnail, String(openGroupId ?? ''), filename, 'jpg');
    if (!openGroupId) {
        $('#group_avatar_preview img').attr('src', thumbnailUrl);
        $('#rm_group_restore_avatar').show();
        return;
    }

    _thisGroup.avatar_url = thumbnailUrl;
    $('#group_avatar_preview').empty().append(getGroupAvatar(_thisGroup));
    $('#rm_group_restore_avatar').show();
    await editGroup(openGroupId, true, true);
}

async function restoreGroupAvatar() {
    const confirm = await Popup.show.confirm('Are you sure you want to restore the group avatar?', 'Your custom image will be deleted, and a collage will be used instead.');
    if (!confirm) {
        return;
    }

    if (!openGroupId) {
        $('#group_avatar_preview img').attr('src', default_avatar);
        $('#rm_group_restore_avatar').hide();
        return;
    }

    let _thisGroup = groups.find((x) => x.id == openGroupId);
    _thisGroup.avatar_url = '';
    $('#group_avatar_preview').empty().append(getGroupAvatar(_thisGroup));
    $('#rm_group_restore_avatar').hide();
    await editGroup(openGroupId, true, true);
}

async function onGroupActionClick(event) {
    event.stopPropagation();
    const action = $(this).data('action');
    const member = $(this).closest('.group_member');

    if (action === 'remove') {
        await modifyGroupMember(openGroupId, member, true);
    }

    if (action === 'add') {
        await modifyGroupMember(openGroupId, member, false);
    }

    if (action === 'enable') {
        member.removeClass('disabled');
        const _thisGroup = groups.find(x => x.id === openGroupId);
        const index = _thisGroup.disabled_members.indexOf(member.data('id'));
        if (index !== -1) {
            _thisGroup.disabled_members.splice(index, 1);
            await editGroup(openGroupId, false, false);
        }
    }

    if (action === 'disable') {
        member.addClass('disabled');
        const _thisGroup = groups.find(x => x.id === openGroupId);
        if (!_thisGroup.disabled_members.includes(member.data('id'))) {
            _thisGroup.disabled_members.push(member.data('id'));
            await editGroup(openGroupId, false, false);
        }
    }

    if (action === 'up' || action === 'down') {
        await reorderGroupMember(openGroupId, member, action);
    }

    if (action === 'view') {
        await openCharacterDefinition(member);
    }

    if (action === 'speak') {
        const chid = Number(member.attr('data-chid'));
        if (Number.isInteger(chid)) {
            Generate('normal', { force_chid: chid });
        }
    }

    await eventSource.emit(event_types.GROUP_UPDATED);
}

function updateFavButtonState(state) {
    fav_grp_checked = state;
    $('#rm_group_fav').val(String(fav_grp_checked));
    $('#group_favorite_button').toggleClass('fav_on', fav_grp_checked);
    $('#group_favorite_button').toggleClass('fav_off', !fav_grp_checked);
}

export async function openGroupById(groupId) {
    if (isChatSaving) {
        toastr.info(t`Please wait until the chat is saved before switching characters.`, t`Your chat is still saving...`);
        return false;
    }

    if (!groups.find(x => x.id === groupId)) {
        console.log('Group not found', groupId);
        return false;
    }

    if (!is_send_press && !is_group_generating) {
        select_group_chats(groupId);

        if (selected_group !== groupId) {
            groupChatQueueOrder = new Map();
            await clearChat();
            cancelTtsPlay();
            selected_group = groupId;
            setCharacterId(undefined);
            setCharacterName('');
            setEditedMessageId(undefined);
            updateChatMetadata({}, true);
            chat.length = 0;
            await getGroupChat(groupId);
            return true;
        }
    }

    return false;
}

async function openCharacterDefinition(characterSelect) {
    if (is_group_generating) {
        toastr.warning(t`Can't peek a character while group reply is being generated`);
        console.warn('Can\'t peek a character def while group reply is being generated');
        return;
    }

    const chid = characterSelect.attr('data-chid');

    if (chid === null || chid === undefined) {
        return;
    }

    await unshallowCharacter(chid);
    setCharacterId(chid);
    select_selected_character(chid);
    // Gentle nudge to recalculate tokens
    RA_CountCharTokens();
    // Do a little tomfoolery to spoof the tag selector
    applyTagsOnCharacterSelect.call(characterSelect);
}

function filterGroupMembers() {
    const searchValue = String($(this).val()).toLowerCase();
    groupCandidatesFilter.setFilterData(FILTER_TYPES.SEARCH, searchValue);
}

async function createGroup() {
    let name = $('#rm_group_chat_name').val();
    let allowSelfResponses = !!$('#rm_group_allow_self_responses').prop('checked');
    let activationStrategy = Number($('#rm_group_activation_strategy').find(':selected').val()) ?? group_activation_strategy.NATURAL;
    let generationMode = Number($('#rm_group_generation_mode').find(':selected').val()) ?? group_generation_mode.SWAP;
    let autoModeDelay = Number($('#rm_group_automode_delay').val()) ?? DEFAULT_AUTO_MODE_DELAY;
    const members = newGroupMembers;
    const memberNames = characters.filter(x => members.includes(x.avatar)).map(x => x.name).join(', ');

    if (!name) {
        name = t`Group: ${memberNames}`;
    }

    const avatar_url = $('#group_avatar_preview img').attr('src');

    const chatName = humanizedDateTime();
    const chats = [chatName];

    const createGroupResponse = await fetch('/api/groups/create', {
        method: 'POST',
        headers: getRequestHeaders(),
        body: JSON.stringify({
            name: name,
            members: members,
            avatar_url: isValidImageUrl(avatar_url) ? avatar_url : default_avatar,
            allow_self_responses: allowSelfResponses,
            hideMutedSprites: hideMutedSprites,
            activation_strategy: activationStrategy,
            generation_mode: generationMode,
            disabled_members: [],
            chat_metadata: {},
            fav: fav_grp_checked,
            chat_id: chatName,
            chats: chats,
            auto_mode_delay: autoModeDelay,
        }),
    });

    if (createGroupResponse.ok) {
        newGroupMembers = [];
        const data = await createGroupResponse.json();
        createTagMapFromList('#groupTagList', data.id);
        await getCharacters();
        select_rm_info('group_create', data.id);
    }
}

export async function createNewGroupChat(groupId) {
    const group = groups.find(x => x.id === groupId);

    if (!group) {
        return;
    }

    const oldChatName = group.chat_id;
    const newChatName = humanizedDateTime();

    if (typeof group.past_metadata !== 'object') {
        group.past_metadata = {};
    }

    await clearChat();
    chat.length = 0;
    if (oldChatName) {
        group.past_metadata[oldChatName] = Object.assign({}, chat_metadata);
    }
    group.chats.push(newChatName);
    group.chat_id = newChatName;
    group.chat_metadata = {};
    updateChatMetadata(group.chat_metadata, true);

    await editGroup(group.id, true, false);
    await getGroupChat(group.id);
}

export async function getGroupPastChats(groupId) {
    const group = groups.find(x => x.id === groupId);

    if (!group) {
        return [];
    }

    const chats = [];

    try {
        for (const chatId of group.chats) {
            const messages = await loadGroupChat(chatId);
            let this_chat_file_size = (JSON.stringify(messages).length / 1024).toFixed(2) + 'kb';
            let chat_items = messages.length;
            const lastMessage = messages.length ? messages[messages.length - 1].mes : '[The chat is empty]';
            const lastMessageDate = messages.length ? (messages[messages.length - 1].send_date || Date.now()) : Date.now();
            chats.push({
                'file_name': chatId,
                'mes': lastMessage,
                'last_mes': lastMessageDate,
                'file_size': this_chat_file_size,
                'chat_items': chat_items,
            });
        }
    } catch (err) {
        console.error(err);
    }
    return chats;
}

export async function openGroupChat(groupId, chatId) {
    await waitUntilCondition(() => !isChatSaving, debounce_timeout.extended, 10);
    const group = groups.find(x => x.id === groupId);

    if (!group || !group.chats.includes(chatId)) {
        return;
    }

    await clearChat();
    chat.length = 0;
    const previousChat = group.chat_id;
    group.past_metadata[previousChat] = Object.assign({}, chat_metadata);
    group.chat_id = chatId;
    group.chat_metadata = group.past_metadata[chatId] || {};
    group['date_last_chat'] = Date.now();
    updateChatMetadata(group.chat_metadata, true);

    await editGroup(groupId, true, false);
    await getGroupChat(groupId);
}

export async function renameGroupChat(groupId, oldChatId, newChatId) {
    const group = groups.find(x => x.id === groupId);

    if (!group || !group.chats.includes(oldChatId)) {
        return;
    }

    if (group.chat_id === oldChatId) {
        group.chat_id = newChatId;
    }

    group.chats.splice(group.chats.indexOf(oldChatId), 1);
    group.chats.push(newChatId);
    group.past_metadata[newChatId] = (group.past_metadata[oldChatId] || {});
    delete group.past_metadata[oldChatId];

    await editGroup(groupId, true, true);
}

/**
 * Deletes a group chat by its name. Doesn't affect displayed chat.
 * @param {string} groupId Group ID
 * @param {string} chatName Name of the chat to delete
 * @returns {Promise<void>}
 */
export async function deleteGroupChatByName(groupId, chatName) {
    const group = groups.find(x => x.id === groupId);
    if (!group || !group.chats.includes(chatName)) {
        return;
    }

    if (typeof group.past_metadata !== 'object') {
        group.past_metadata = {};
    }

    group.chats.splice(group.chats.indexOf(chatName), 1);
    delete group.past_metadata[chatName];

    const response = await fetch('/api/chats/group/delete', {
        method: 'POST',
        headers: getRequestHeaders(),
        body: JSON.stringify({ id: chatName }),
    });

    if (!response.ok) {
        toastr.error(t`Check the server connection and reload the page to prevent data loss.`, t`Group chat could not be deleted`);
        console.error('Group chat could not be deleted');
        return;
    }

    // If the deleted chat was the current chat, switch to the last chat in the group
    if (group.chat_id === chatName) {
        group.chat_id = '';
        group.chat_metadata = {};

        const newChatName = group.chats.length ? group.chats[group.chats.length - 1] : humanizedDateTime();
        group.chat_id = newChatName;
        group.chat_metadata = group.past_metadata[newChatName] || {};
    }

    await editGroup(groupId, true, true);
    await eventSource.emit(event_types.GROUP_CHAT_DELETED, chatName);
}

/**
 * Deletes a group chat by name.
 * @param {string} groupId The ID of the group containing the chat to delete.
 * @param {string} chatId The id/name of the chat to delete.
 * @param {object} [options={}] Options for the deletion.
 * @param {boolean} [options.jumpToNewChat=true] Whether to jump to a new chat after deletion (existing one, or create a new one if none exists)
 */
export async function deleteGroupChat(groupId, chatId, { jumpToNewChat = true } = {}) {
    const group = groups.find(x => x.id === groupId);

    if (!group || !group.chats.includes(chatId)) {
        return;
    }

    group.chats.splice(group.chats.indexOf(chatId), 1);
    delete group.past_metadata[chatId];

    if (group.chat_id === chatId) {
        group.chat_id = '';
        group.chat_metadata = {};
        updateChatMetadata(group.chat_metadata, true);
    }

    const response = await fetch('/api/chats/group/delete', {
        method: 'POST',
        headers: getRequestHeaders(),
        body: JSON.stringify({ id: chatId }),
    });

    if (response.ok) {
        if (jumpToNewChat) {
            if (group.chats.length) {
                await openGroupChat(groupId, group.chats[group.chats.length - 1]);
            } else {
                await createNewGroupChat(groupId);
            }
        }

        await eventSource.emit(event_types.GROUP_CHAT_DELETED, chatId);
    }
}

/**
 * Imports a group chat from a file and adds it to the group.
 * @param {FormData} formData Form data to send to the server
 * @param {object} [options={}] Options for the import
 * @param {boolean} [options.refresh] Whether to refresh the group chat list after import
 * @returns {Promise<string[]>} List of imported file names
 */
export async function importGroupChat(formData, { refresh = true } = {}) {
    const fetchResult = await fetch('/api/chats/group/import', {
        method: 'POST',
        headers: getRequestHeaders({ omitContentType: true }),
        body: formData,
        cache: 'no-cache',
    });

    if (fetchResult.ok) {
        const data = await fetchResult.json();
        if (data.res) {
            const chatId = data.res;
            const group = groups.find(x => x.id == selected_group);

            if (group) {
                group.chats.push(chatId);
                await editGroup(selected_group, true, true);
                if (refresh) {
                    await displayPastChats();
                }
            }
        }

        return data?.fileNames || [];
    }

    return [];
}

export async function saveGroupBookmarkChat(groupId, name, metadata, mesId) {
    const group = groups.find(x => x.id === groupId);

    if (!group) {
        return;
    }

    group.past_metadata[name] = { ...chat_metadata, ...(metadata || {}) };
    group.chats.push(name);

    const trimmed_chat = (mesId !== undefined && mesId >= 0 && mesId < chat.length)
        ? chat.slice(0, parseInt(mesId) + 1)
        : chat;

    await editGroup(groupId, true, false);

    const response = await fetch('/api/chats/group/save', {
        method: 'POST',
        headers: getRequestHeaders(),
        body: JSON.stringify({ id: name, chat: [...trimmed_chat] }),
    });

    if (!response.ok) {
        toastr.error(t`Check the server connection and reload the page to prevent data loss.`, t`Group chat could not be saved`);
        console.error('Group chat could not be saved', response);
    }
}

function onSendTextareaInput() {
    if (is_group_automode_enabled) {
        // Wait for current automode generation to finish
        is_group_automode_enabled = false;
        $('#rm_group_automode').prop('checked', false);
    }
}

function stopAutoModeGeneration() {
    if (groupAutoModeAbortController) {
        groupAutoModeAbortController.abort();
    }

    is_group_automode_enabled = false;
    $('#rm_group_automode').prop('checked', false);
}

function doCurMemberListPopout() {
    //repurposes the zoomed avatar template to server as a floating group member list
    if ($('#groupMemberListPopout').length === 0) {
        console.debug('did not see popout yet, creating');
        const memberListClone = $(this).parent().parent().find('.inline-drawer-content').html();
        const template = $('#zoomed_avatar_template').html();
        const controlBarHtml = `<div class="panelControlBar flex-container">
        <div id="groupMemberListPopoutheader" class="fa-solid fa-grip drag-grabber hoverglow"></div>
        <div id="groupMemberListPopoutClose" class="fa-solid fa-circle-xmark hoverglow"></div>
    </div>`;
        const newElement = $(template);

        newElement.attr('id', 'groupMemberListPopout')
            .removeClass('zoomed_avatar')
            .addClass('draggable')
            .empty()
            .append(controlBarHtml)
            .append(memberListClone);

        // Remove pagination from popout
        newElement.find('.group_pagination').empty();

        $('#movingDivs').append(newElement);
        loadMovingUIState();
        $('#groupMemberListPopout').fadeIn(animation_duration);
        dragElement(newElement);
        $('#groupMemberListPopoutClose').off('click').on('click', function () {
            $('#groupMemberListPopout').fadeOut(animation_duration, () => { $('#groupMemberListPopout').remove(); });
        });

        // Re-add pagination not working in popout
        printGroupMembers();
    } else {
        console.debug('saw existing popout, removing');
        $('#groupMemberListPopout').fadeOut(animation_duration, () => { $('#groupMemberListPopout').remove(); });
    }
}

jQuery(() => {
    if (!CSS.supports('field-sizing', 'content')) {
        $(document).on('input', '#rm_group_chats_block .autoSetHeight', function () {
            resetScrollHeight($(this));
        });
    }

    $(document).on('click', '.group_select', function () {
        const groupId = $(this).attr('data-chid') || $(this).attr('data-grid');
        openGroupById(groupId);
    });
    $('#rm_group_filter').on('input', filterGroupMembers);
    $('#rm_group_submit').on('click', createGroup);
    $('#rm_group_scenario').on('click', setCharacterSettingsOverrides);
    $('#rm_group_automode').on('input', function () {
        const value = $(this).prop('checked');
        is_group_automode_enabled = value;
        eventSource.once(event_types.GENERATION_STOPPED, stopAutoModeGeneration);
    });
    $('#rm_group_hidemutedsprites').on('input', function () {
        const value = $(this).prop('checked');
        hideMutedSprites = value;
        onHideMutedSpritesClick(value);

    });
    $('#send_textarea').on('keyup', onSendTextareaInput);
    $('#groupCurrentMemberPopoutButton').on('click', doCurMemberListPopout);
    $('#rm_group_chat_name').on('input', onGroupNameInput);
    $('#rm_group_delete').off().on('click', onDeleteGroupClick);
    $('#group_favorite_button').on('click', onFavoriteGroupClick);
    $('#rm_group_allow_self_responses').on('input', onGroupSelfResponsesClick);
    $('#rm_group_activation_strategy').on('change', onGroupActivationStrategyInput);
    $('#rm_group_generation_mode').on('change', onGroupGenerationModeInput);
    $('#rm_group_automode_delay').on('input', onGroupAutoModeDelayInput);
    $('#rm_group_generation_mode_join_prefix').on('input', onGroupGenerationModeTemplateInput);
    $('#rm_group_generation_mode_join_suffix').on('input', onGroupGenerationModeTemplateInput);
    $('#group_avatar_button').on('input', uploadGroupAvatar);
    $('#rm_group_restore_avatar').on('click', restoreGroupAvatar);
    $(document).on('click', '.group_member .right_menu_button', onGroupActionClick);
});
