import {
    addOneMessage,
    characters,
    chat,
    chat_metadata,
    default_avatar,
    eventSource,
    event_types,
    extractMessageBias,
    getThumbnailUrl,
    replaceBiasMarkup,
    saveChatConditional,
    sendSystemMessage,
    setUserName,
    substituteParams,
    comment_avatar,
    system_avatar,
    system_message_types,
    setCharacterId,
    generateQuietPrompt,
    reloadCurrentChat,
    sendMessageAsUser,
    name1,
    Generate,
    this_chid,
    setCharacterName,
} from "../script.js";
import { getMessageTimeStamp } from "./RossAscends-mods.js";
import { groups, is_group_generating, resetSelectedGroup, selected_group } from "./group-chats.js";
import { getRegexedString, regex_placement } from "./extensions/regex/engine.js";
import { chat_styles, power_user } from "./power-user.js";
import { autoSelectPersona } from "./personas.js";
import { getContext } from "./extensions.js";
import { hideChatMessage, unhideChatMessage } from "./chats.js";
import { stringToRange } from "./utils.js";
export {
    executeSlashCommands,
    registerSlashCommand,
    getSlashCommandsHelp,
}

class SlashCommandParser {
    constructor() {
        this.commands = {};
        this.helpStrings = {};
    }

    addCommand(command, callback, aliases, helpString = '', interruptsGeneration = false, purgeFromMessage = true) {
        const fnObj = { callback, helpString, interruptsGeneration, purgeFromMessage };

        if ([command, ...aliases].some(x => this.commands.hasOwnProperty(x))) {
            console.trace('WARN: Duplicate slash command registered!');
        }

        this.commands[command] = fnObj;

        if (Array.isArray(aliases)) {
            aliases.forEach((alias) => {
                this.commands[alias] = fnObj;
            });
        }

        let stringBuilder = `<span class="monospace">/${command}</span> ${helpString} `;
        if (Array.isArray(aliases) && aliases.length) {
            let aliasesString = `(alias: ${aliases.map(x => `<span class="monospace">/${x}</span>`).join(', ')})`;
            stringBuilder += aliasesString;
        }
        this.helpStrings[command] = stringBuilder;
    }

    parse(text) {
        const excludedFromRegex = ["sendas"]
        const firstSpace = text.indexOf(' ');
        const command = firstSpace !== -1 ? text.substring(1, firstSpace) : text.substring(1);
        const args = firstSpace !== -1 ? text.substring(firstSpace + 1) : '';
        const argObj = {};
        let unnamedArg;

        if (args.length > 0) {
            const argsArray = args.split(' ');
            for (let arg of argsArray) {
                const equalsIndex = arg.indexOf('=');
                if (equalsIndex !== -1) {
                    const key = arg.substring(0, equalsIndex);
                    const value = arg.substring(equalsIndex + 1);
                    // Replace "wrapping quotes" used for escaping spaces
                    argObj[key] = value.replace(/(^")|("$)/g, '');
                }
                else {
                    break;
                }
            }

            unnamedArg = argsArray.slice(Object.keys(argObj).length).join(' ');

            // Excluded commands format in their own function
            if (!excludedFromRegex.includes(command)) {
                unnamedArg = getRegexedString(
                    unnamedArg,
                    regex_placement.SLASH_COMMAND
                );
            }
        }

        if (this.commands[command]) {
            return { command: this.commands[command], args: argObj, value: unnamedArg };
        }

        return false;
    }

    getHelpString() {
        const listItems = Object
            .entries(this.helpStrings)
            .sort((a, b) => a[0].localeCompare(b[0]))
            .map(x => x[1])
            .map(x => `<li>${x}</li>`)
            .join('\n');
        return `<p>Slash commands:</p><ol>${listItems}</ol>
        <small>Slash commands can be batched into a single input by adding a pipe character | at the end, and then writing a new slash command.</small>
        <ul><li><small>Example:</small><code>/cut 1 | /sys Hello, | /continue</code></li>
        <li>This will remove the first message in chat, send a system message that starts with 'Hello,', and then ask the AI to continue the message.</li></ul>`;
    }
}

const parser = new SlashCommandParser();
const registerSlashCommand = parser.addCommand.bind(parser);
const getSlashCommandsHelp = parser.getHelpString.bind(parser);

parser.addCommand('?', helpCommandCallback, ['help'], ' – get help on macros, chat formatting and commands', true, true);
parser.addCommand('name', setNameCallback, ['persona'], '<span class="monospace">(name)</span> – sets user name and persona avatar (if set)', true, true);
parser.addCommand('sync', syncCallback, [], ' – syncs user name in user-attributed messages in the current chat', true, true);
parser.addCommand('lock', bindCallback, ['bind'], ' – locks/unlocks a persona (name and avatar) to the current chat', true, true);
parser.addCommand('bg', setBackgroundCallback, ['background'], '<span class="monospace">(filename)</span> – sets a background according to filename, partial names allowed', false, true);
parser.addCommand('sendas', sendMessageAs, [], ` – sends message as a specific character. Uses character avatar if it exists in the characters list. Example that will send "Hello, guys!" from "Chloe": <pre><code>/sendas Chloe&#10;Hello, guys!</code></pre>`, true, true);
parser.addCommand('sys', sendNarratorMessage, ['nar'], '<span class="monospace">(text)</span> – sends message as a system narrator', false, true);
parser.addCommand('sysname', setNarratorName, [], '<span class="monospace">(name)</span> – sets a name for future system narrator messages in this chat (display only). Default: System. Leave empty to reset.', true, true);
parser.addCommand('comment', sendCommentMessage, [], '<span class="monospace">(text)</span> – adds a note/comment message not part of the chat', false, true);
parser.addCommand('single', setStoryModeCallback, ['story'], ' – sets the message style to single document mode without names or avatars visible', true, true);
parser.addCommand('bubble', setBubbleModeCallback, ['bubbles'], ' – sets the message style to bubble chat mode', true, true);
parser.addCommand('flat', setFlatModeCallback, ['default'], ' – sets the message style to flat chat mode', true, true);
parser.addCommand('continue', continueChatCallback, ['cont'], ' – continues the last message in the chat', true, true);
parser.addCommand('go', goToCharacterCallback, ['char'], '<span class="monospace">(name)</span> – opens up a chat with the character by its name', true, true);
parser.addCommand('sysgen', generateSystemMessage, [], '<span class="monospace">(prompt)</span> – generates a system message using a specified prompt', true, true);
parser.addCommand('ask', askCharacter, [], '<span class="monospace">(prompt)</span> – asks a specified character card a prompt', true, true);
parser.addCommand('delname', deleteMessagesByNameCallback, ['cancel'], '<span class="monospace">(name)</span> – deletes all messages attributed to a specified name', true, true);
parser.addCommand('send', sendUserMessageCallback, ['add'], '<span class="monospace">(text)</span> – adds a user message to the chat log without triggering a generation', true, true);
parser.addCommand('trigger', triggerGroupMessageCallback, [], '<span class="monospace">(member index or name)</span> – triggers a message generation for the specified group member', true, true);
parser.addCommand('hide', hideMessageCallback, [], '<span class="monospace">(message index or range)</span> – hides a chat message from the prompt', true, true);
parser.addCommand('unhide', unhideMessageCallback, [], '<span class="monospace">(message index or range)</span> – unhides a message from the prompt', true, true);

const NARRATOR_NAME_KEY = 'narrator_name';
const NARRATOR_NAME_DEFAULT = 'System';
export const COMMENT_NAME_DEFAULT = 'Note';

async function askCharacter(_, text) {
    // Prevent generate recursion
    $('#send_textarea').val('');

    // Not supported in group chats
    // TODO: Maybe support group chats?
    if (selected_group) {
        toastr.error("Cannot run this command in a group chat!");
        return;
    }

    if (!text) {
        console.warn('WARN: No text provided for /ask command')
    }

    const parts = text.split('\n');
    if (parts.length <= 1) {
        toastr.warning('Both character name and message are required. Separate them with a new line.');
        return;
    }

    // Grabbing the message
    const name = parts.shift().trim();
    let mesText = parts.join('\n').trim();
    const prevChId = this_chid;

    // Find the character
    const chId = characters.findIndex((e) => e.name === name);
    if (!characters[chId] || chId === -1) {
        toastr.error("Character not found.");
        return;
    }

    // Override character and send a user message
    setCharacterId(chId);

    // TODO: Maybe look up by filename instead of name
    const character = characters[chId];
    let force_avatar, original_avatar;

    if (character && character.avatar !== 'none') {
        force_avatar = getThumbnailUrl('avatar', character.avatar);
        original_avatar = character.avatar;
    }
    else {
        force_avatar = default_avatar;
        original_avatar = default_avatar;
    }

    setCharacterName(character.name);

    sendMessageAsUser(mesText)

    const restoreCharacter = () => {
        setCharacterId(prevChId);
        setCharacterName(characters[prevChId].name);

        // Only force the new avatar if the character name is the same
        // This skips if an error was fired
        const lastMessage = chat[chat.length - 1];
        if (lastMessage && lastMessage?.name === character.name) {
            lastMessage.force_avatar = force_avatar;
            lastMessage.original_avatar = original_avatar;
        }

        // Kill this callback once the event fires
        eventSource.removeListener(event_types.CHARACTER_MESSAGE_RENDERED, restoreCharacter)
    }

    // Run generate and restore previous character on error
    try {
        toastr.info(`Asking ${character.name} something...`);
        await Generate('ask_command')
    } catch {
        restoreCharacter()
    }

    // Restore previous character once message renders
    // Hack for generate
    eventSource.on(event_types.CHARACTER_MESSAGE_RENDERED, restoreCharacter);
}

async function hideMessageCallback(_, arg) {
    if (!arg) {
        console.warn('WARN: No argument provided for /hide command');
        return;
    }

    const range = stringToRange(arg, 0, chat.length - 1);

    if (!range) {
        console.warn(`WARN: Invalid range provided for /hide command: ${arg}`);
        return;
    }

    for (let messageId = range.start; messageId <= range.end; messageId++) {
        const messageBlock = $(`.mes[mesid="${messageId}"]`);

        if (!messageBlock.length) {
            console.warn(`WARN: No message found with ID ${messageId}`);
            return;
        }

        await hideChatMessage(messageId, messageBlock);
    }
}

async function unhideMessageCallback(_, arg) {
    if (!arg) {
        console.warn('WARN: No argument provided for /unhide command');
        return;
    }

    const range = stringToRange(arg, 0, chat.length - 1);

    if (!range) {
        console.warn(`WARN: Invalid range provided for /unhide command: ${arg}`);
        return;
    }

    for (let messageId = range.start; messageId <= range.end; messageId++) {
        const messageBlock = $(`.mes[mesid="${messageId}"]`);

        if (!messageBlock.length) {
            console.warn(`WARN: No message found with ID ${messageId}`);
            return;
        }

        await unhideChatMessage(messageId, messageBlock);
    }
}

async function triggerGroupMessageCallback(_, arg) {
    if (!selected_group) {
        toastr.warning("Cannot run trigger command outside of a group chat.");
        return;
    }

    if (is_group_generating) {
        toastr.warning("Cannot run trigger command while the group reply is generating.");
        return;
    }

    arg = arg?.trim();

    if (!arg) {
        console.warn('WARN: No argument provided for /trigger command');
        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;
    }

    // Prevent generate recursion
    $('#send_textarea').val('');

    // Index is 1-based
    const index = parseInt(arg) - 1;
    const searchByName = isNaN(index);

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

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

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

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

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

        Generate('normal', { force_chid: chid });
    } 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(`Triggering group member ${memberAvatar} at index ${index}`);
        Generate('normal', { force_chid: chid });
    }
}

async function sendUserMessageCallback(_, text) {
    if (!text) {
        console.warn('WARN: No text provided for /send command');
        return;
    }

    text = text.trim();
    const bias = extractMessageBias(text);
    await sendMessageAsUser(text, bias);
}

async function deleteMessagesByNameCallback(_, name) {
    if (!name) {
        console.warn('WARN: No name provided for /delname command');
        return;
    }

    name = name.trim();

    const messagesToDelete = [];
    chat.forEach((value) => {
        if (value.name === name) {
            messagesToDelete.push(value);
        }
    });

    if (!messagesToDelete.length) {
        console.debug('/delname: Nothing to delete');
        return;
    }

    for (const message of messagesToDelete) {
        const index = chat.indexOf(message);
        if (index !== -1) {
            console.debug(`/delname: Deleting message #${index}`, message);
            chat.splice(index, 1);
        }
    }

    await saveChatConditional();
    await reloadCurrentChat();

    toastr.info(`Deleted ${messagesToDelete.length} messages from ${name}`);
}

function findCharacterIndex(name) {
    const matchTypes = [
        (a, b) => a === b,
        (a, b) => a.startsWith(b),
        (a, b) => a.includes(b),
    ];

    for (const matchType of matchTypes) {
        const index = characters.findIndex(x => matchType(x.name.toLowerCase(), name.toLowerCase()));
        if (index !== -1) {
            return index;
        }
    }

    return -1;
}

function goToCharacterCallback(_, name) {
    if (!name) {
        console.warn('WARN: No character name provided for /go command');
        return;
    }

    name = name.trim();
    const characterIndex = findCharacterIndex(name);

    if (characterIndex !== -1) {
        openChat(new String(characterIndex));
    } else {
        console.warn(`No matches found for name "${name}"`);
    }
}

function openChat(id) {
    resetSelectedGroup();
    setCharacterId(id);
    setTimeout(() => {
        reloadCurrentChat();
    }, 1);
}

function continueChatCallback() {
    // Prevent infinite recursion
    $('#send_textarea').val('');
    $('#option_continue').trigger('click', { fromSlashCommand: true });
}

export async function generateSystemMessage(_, prompt) {
    $('#send_textarea').val('');

    if (!prompt) {
        console.warn('WARN: No prompt provided for /sysgen command');
        toastr.warning('You must provide a prompt for the system message');
        return;
    }

    // Generate and regex the output if applicable
    toastr.info('Please wait', 'Generating...');
    let message = await generateQuietPrompt(prompt);
    message = getRegexedString(message, regex_placement.SLASH_COMMAND);

    sendNarratorMessage(_, message);
}

function syncCallback() {
    $('#sync_name_button').trigger('click');
}

function bindCallback() {
    $('#lock_user_name').trigger('click');
}

function setStoryModeCallback() {
    $('#chat_display').val(chat_styles.DOCUMENT).trigger('change');
}

function setBubbleModeCallback() {
    $('#chat_display').val(chat_styles.BUBBLES).trigger('change');
}

function setFlatModeCallback() {
    $('#chat_display').val(chat_styles.DEFAULT).trigger('change');
}

function setNameCallback(_, name) {
    if (!name) {
        toastr.warning('you must specify a name to change to')
        return;
    }

    name = name.trim();

    // If the name is a persona, auto-select it
    for (let persona of Object.values(power_user.personas)) {
        if (persona.toLowerCase() === name.toLowerCase()) {
            autoSelectPersona(name);
            return;
        }
    }

    // Otherwise, set just the name
    setUserName(name); //this prevented quickReply usage
}

async function setNarratorName(_, text) {
    const name = text || NARRATOR_NAME_DEFAULT;
    chat_metadata[NARRATOR_NAME_KEY] = name;
    toastr.info(`System narrator name set to ${name}`);
    await saveChatConditional();
}

export async function sendMessageAs(_, text) {
    if (!text) {
        return;
    }

    const parts = text.split('\n');
    if (parts.length <= 1) {
        toastr.warning('Both character name and message are required. Separate them with a new line.');
        return;
    }

    const name = parts.shift().trim();
    let mesText = parts.join('\n').trim();

    // Requires a regex check after the slash command is pushed to output
    mesText = getRegexedString(mesText, regex_placement.SLASH_COMMAND, { characterOverride: name });

    // Messages that do nothing but set bias will be hidden from the context
    const bias = extractMessageBias(mesText);
    const isSystem = replaceBiasMarkup(mesText).trim().length === 0;

    const character = characters.find(x => x.name === name);
    let force_avatar, original_avatar;

    if (character && character.avatar !== 'none') {
        force_avatar = getThumbnailUrl('avatar', character.avatar);
        original_avatar = character.avatar;
    }
    else {
        force_avatar = default_avatar;
        original_avatar = default_avatar;
    }

    const message = {
        name: name,
        is_user: false,
        is_system: isSystem,
        send_date: getMessageTimeStamp(),
        mes: substituteParams(mesText),
        force_avatar: force_avatar,
        original_avatar: original_avatar,
        extra: {
            bias: bias.trim().length ? bias : null,
            gen_id: Date.now(),
        }
    };

    chat.push(message);
    await eventSource.emit(event_types.MESSAGE_SENT, (chat.length - 1));
    addOneMessage(message);
    await eventSource.emit(event_types.USER_MESSAGE_RENDERED, (chat.length - 1));
    await saveChatConditional();
}

export async function sendNarratorMessage(_, text) {
    if (!text) {
        return;
    }

    const name = chat_metadata[NARRATOR_NAME_KEY] || NARRATOR_NAME_DEFAULT;
    // Messages that do nothing but set bias will be hidden from the context
    const bias = extractMessageBias(text);
    const isSystem = replaceBiasMarkup(text).trim().length === 0;

    const message = {
        name: name,
        is_user: false,
        is_system: isSystem,
        send_date: getMessageTimeStamp(),
        mes: substituteParams(text.trim()),
        force_avatar: system_avatar,
        extra: {
            type: system_message_types.NARRATOR,
            bias: bias.trim().length ? bias : null,
            gen_id: Date.now(),
        },
    };

    chat.push(message);
    await eventSource.emit(event_types.MESSAGE_SENT, (chat.length - 1));
    addOneMessage(message);
    await eventSource.emit(event_types.USER_MESSAGE_RENDERED, (chat.length - 1));
    await saveChatConditional();
}

export async function promptQuietForLoudResponse(who, text) {

    let character_id = getContext().characterId;
    if (who === 'sys') {
        text = "System: " + text;
    } else if (who === 'user') {
        text = name1 + ": " + text;
    } else if (who === 'char') {
        text = characters[character_id].name + ": " + text;
    } else if (who === 'raw') {
        text = text;
    }

    //text = `${text}${power_user.instruct.enabled ? '' : '\n'}${(power_user.always_force_name2 && who != 'raw') ? characters[character_id].name + ":" : ""}`

    let reply = await generateQuietPrompt(text, true);
    text = await getRegexedString(reply, regex_placement.SLASH_COMMAND);

    const message = {
        name: characters[character_id].name,
        is_user: false,
        is_name: true,
        is_system: false,
        send_date: getMessageTimeStamp(),
        mes: substituteParams(text.trim()),
        extra: {
            type: system_message_types.COMMENT,
            gen_id: Date.now(),
        },
    };

    chat.push(message);
    await eventSource.emit(event_types.MESSAGE_SENT, (chat.length - 1));
    addOneMessage(message);
    await eventSource.emit(event_types.USER_MESSAGE_RENDERED, (chat.length - 1));
    await saveChatConditional();

}

async function sendCommentMessage(_, text) {
    if (!text) {
        return;
    }

    const message = {
        name: COMMENT_NAME_DEFAULT,
        is_user: false,
        is_system: true,
        send_date: getMessageTimeStamp(),
        mes: substituteParams(text.trim()),
        force_avatar: comment_avatar,
        extra: {
            type: system_message_types.COMMENT,
            gen_id: Date.now(),
        },
    };

    chat.push(message);
    await eventSource.emit(event_types.MESSAGE_SENT, (chat.length - 1));
    addOneMessage(message);
    await eventSource.emit(event_types.USER_MESSAGE_RENDERED, (chat.length - 1));
    await saveChatConditional();
}

/**
 * Displays a help message from the slash command
 * @param {any} _ Unused
 * @param {string} type Type of help to display
 */
function helpCommandCallback(_, type) {
    switch (type?.trim()?.toLowerCase()) {
        case 'slash':
        case 'commands':
        case 'slashes':
        case 'slash commands':
        case '1':
            sendSystemMessage(system_message_types.SLASH_COMMANDS);
            break;
        case 'format':
        case 'formatting':
        case 'formats':
        case 'chat formatting':
        case '2':
            sendSystemMessage(system_message_types.FORMATTING);
            break;
        case 'hotkeys':
        case 'hotkey':
        case '3':
            sendSystemMessage(system_message_types.HOTKEYS);
            break;
        case 'macros':
        case 'macro':
        case '4':
            sendSystemMessage(system_message_types.MACROS);
            break;
        default:
            sendSystemMessage(system_message_types.HELP);
            break;
    }
}

$(document).on('click', '[data-displayHelp]', function (e) {
    e.preventDefault();
    const page = String($(this).data('displayhelp'));
    helpCommandCallback(null, page);
});

function setBackgroundCallback(_, bg) {
    if (!bg) {
        return;
    }

    console.log('Set background to ' + bg);

    const bgElements = Array.from(document.querySelectorAll(`.bg_example`)).map((x) => ({ element: x, bgfile: x.getAttribute('bgfile') }));

    const fuse = new Fuse(bgElements, { keys: ['bgfile'] });
    const result = fuse.search(bg);

    if (!result.length) {
        toastr.error(`No background found with name "${bg}"`);
        return;
    }

    const bgElement = result[0].item.element;

    if (bgElement instanceof HTMLElement) {
        bgElement.click();
    }
}

async function executeSlashCommands(text) {
    if (!text) {
        return false;
    }

    // Hack to allow multi-line slash commands
    // All slash command messages should begin with a slash
    const lines = text.split('|').map(line => line.trim());
    const linesToRemove = [];

    let interrupt = false;

    for (let index = 0; index < lines.length; index++) {
        const trimmedLine = lines[index].trim();

        if (!trimmedLine.startsWith('/')) {
            continue;
        }

        const result = parser.parse(trimmedLine);

        if (!result) {
            continue;
        }

        if (result.value && typeof result.value === 'string') {
            result.value = substituteParams(result.value.trim());
        }

        console.debug('Slash command executing:', result);
        await result.command.callback(result.args, result.value);

        if (result.command.interruptsGeneration) {
            interrupt = true;
        }

        if (result.command.purgeFromMessage) {
            linesToRemove.push(lines[index]);
        }
    }

    const newText = lines.filter(x => linesToRemove.indexOf(x) === -1).join('\n');

    return { interrupt, newText };
}

function setSlashCommandAutocomplete(textarea) {
    textarea.autocomplete({
        source: (input, output) => {
            // Only show for slash commands and if there's no space
            if (!input.term.startsWith('/') || input.term.includes(' ')) {
                output([]);
                return;
            }

            const slashCommand = input.term.toLowerCase().substring(1); // Remove the slash
            const result = Object
                .keys(parser.helpStrings) // Get all slash commands
                .filter(x => x.startsWith(slashCommand)) // Filter by the input
                .sort((a, b) => a.localeCompare(b)) // Sort alphabetically
                // .slice(0, 20) // Limit to 20 results
                .map(x => ({ label: parser.helpStrings[x], value: `/${x} ` })); // Map to the help string

            output(result); // Return the results
        },
        select: (e, u) => {
            // unfocus the input
            $(e.target).val(u.item.value);
        },
        minLength: 1,
        position: { my: "left bottom", at: "left top", collision: "none" },
    });

    textarea.autocomplete("instance")._renderItem = function (ul, item) {
        const width = $(textarea).innerWidth();
        const content = $('<div></div>').html(item.label);
        return $("<li>").width(width).append(content).appendTo(ul);
    };
}

jQuery(function () {
    const textarea = $('#send_textarea');
    setSlashCommandAutocomplete(textarea);
})