import { saveSettings, callPopup, token, substituteParams } from "../script.js";
import { download, debounce } from "./utils.js";
import { encode } from "./gpt-2-3-tokenizer/mod.js";

export {
    world_info,
    world_info_data,
    world_info_budget,
    world_info_depth,
    world_names,
    imported_world_name,
    checkWorldInfo,
    deleteWorldInfo,
    selectImportedWorldInfo,
    setWorldInfoSettings,
}

let world_info = null;
let world_names;
let world_info_data = null;
let world_info_depth = 2;
let world_info_budget = 128;
let is_world_edit_open = false;
let imported_world_name = "";
const saveWorldDebounced = debounce(async () => await _save(), 500);
const saveSettingsDebounced = debounce(() => saveSettings(), 500);

const world_info_position = {
    before: 0,
    after: 1,
};

function setWorldInfoSettings(settings, data) {
    if (settings.world_info_depth !== undefined)
        world_info_depth = Number(settings.world_info_depth);
    if (settings.world_info_budget !== undefined)
        world_info_budget = Number(settings.world_info_budget);

    $("#world_info_depth_counter").html(`${world_info_depth} Messages`);
    $("#world_info_depth").val(world_info_depth);

    $("#world_info_budget_counter").html(`${world_info_budget} Tokens`);
    $("#world_info_budget").val(world_info_budget);

    world_names = data.world_names?.length ? data.world_names : [];

    if (settings.world_info != undefined) {
        if (world_names.includes(settings.world_info)) {
            world_info = settings.world_info;
        }
    }

    world_names.forEach((item, i) => {
        $("#world_info").append(`<option value='${i}'>${item}</option>`);
        // preselect world if saved
        if (item == world_info) {
            $("#world_info").val(i).change();
        }
    });
}

// World Info Editor
async function showWorldEditor() {
    if (!world_info) {
        callPopup("<h3>Select a world info first!</h3>", "default");
        return;
    }

    is_world_edit_open = true;
    $("#world_popup_name").val(world_info);
    $("#world_popup").css("display", "flex");
    await loadWorldInfoData();
    displayWorldEntries(world_info_data);
}

async function loadWorldInfoData() {
    if (!world_info) {
        return;
    }

    const response = await fetch("/getworldinfo", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
            "X-CSRF-Token": token,
        },
        body: JSON.stringify({ name: world_info }),
    });

    if (response.ok) {
        world_info_data = await response.json();
    }
}

async function updateWorldInfoList(importedWorldName) {
    var result = await fetch("/getsettings", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
            "X-CSRF-Token": token,
        },
        body: JSON.stringify({}),
    });

    if (result.ok) {
        var data = await result.json();
        world_names = data.world_names?.length ? data.world_names : [];
        $("#world_info").find('option[value!="None"]').remove();

        world_names.forEach((item, i) => {
            $("#world_info").append(`<option value='${i}'>${item}</option>`);
        });

        if (importedWorldName) {
            const indexOf = world_names.indexOf(world_info);
            $("#world_info").val(indexOf);

            callPopup("<h3>World imported successfully! Select it now?</h3>", "world_imported");
        }
    }
}

function hideWorldEditor() {
    is_world_edit_open = false;
    $("#world_popup").css("display", "none");
}

function displayWorldEntries(data) {
    $("#world_popup_entries_list").empty();

    if (!data || !("entries" in data)) {
        return;
    }

    for (const entryUid in data.entries) {
        const entry = data.entries[entryUid];
        appendWorldEntry(entry);
    }
}

function appendWorldEntry(entry) {
    const template = $("#entry_edit_template .world_entry").clone();
    template.data("uid", entry.uid);

    // key
    const keyInput = template.find('textarea[name="key"]');
    keyInput.data("uid", entry.uid);
    keyInput.on("input", function () {
        const uid = $(this).data("uid");
        const value = $(this).val();
        $(this).css("height", ""); //reset the height
        $(this).css("height", $(this).prop("scrollHeight") + "px");
        world_info_data.entries[uid].key = value
            .split(",")
            .map((x) => x.trim())
            .filter((x) => x);
        saveWorldInfo();
    });
    keyInput.val(entry.key.join(",")).trigger("input");
    keyInput.css("height", ""); //reset the height
    keyInput.css("height", $(this).prop("scrollHeight") + "px");

    // keysecondary
    const keySecondaryInput = template.find('textarea[name="keysecondary"]');
    keySecondaryInput.data("uid", entry.uid);
    keySecondaryInput.on("input", function () {
        const uid = $(this).data("uid");
        const value = $(this).val();
        $(this).css("height", ""); //reset the height
        $(this).css("height", $(this).prop("scrollHeight") + "px");
        world_info_data.entries[uid].keysecondary = value
            .split(",")
            .map((x) => x.trim())
            .filter((x) => x);
        saveWorldInfo();
    });
    keySecondaryInput.val(entry.keysecondary.join(",")).trigger("input");
    keySecondaryInput.css("height", ""); //reset the height
    keySecondaryInput.css("height", $(this).prop("scrollHeight") + "px");

    // comment
    const commentInput = template.find('textarea[name="comment"]');
    commentInput.data("uid", entry.uid);
    commentInput.on("input", function () {
        const uid = $(this).data("uid");
        const value = $(this).val();
        $(this).css("height", ""); //reset the height
        $(this).css("height", $(this).prop("scrollHeight") + "px");
        world_info_data.entries[uid].comment = value;
        saveWorldInfo();
    });
    commentInput.val(entry.comment).trigger("input");
    commentInput.css("height", ""); //reset the height
    commentInput.css("height", $(this).prop("scrollHeight") + "px");

    // content
    const contentInput = template.find('textarea[name="content"]');
    contentInput.data("uid", entry.uid);
    contentInput.on("input", function () {
        const uid = $(this).data("uid");
        const value = $(this).val();
        world_info_data.entries[uid].content = value;
        $(this).css("height", ""); //reset the height
        $(this).css("height", $(this).prop("scrollHeight") + "px");
        saveWorldInfo();

        // count tokens
        const numberOfTokens = encode(value).length;
        $(this)
            .closest(".world_entry")
            .find(".world_entry_form_token_counter")
            .html(numberOfTokens);
    });
    contentInput.val(entry.content).trigger("input");
    contentInput.css("height", ""); //reset the height
    contentInput.css("height", $(this).prop("scrollHeight") + "px");

    // selective
    const selectiveInput = template.find('input[name="selective"]');
    selectiveInput.data("uid", entry.uid);
    selectiveInput.on("input", function () {
        const uid = $(this).data("uid");
        const value = $(this).prop("checked");
        world_info_data.entries[uid].selective = value;
        saveWorldInfo();

        const keysecondary = $(this)
            .closest(".world_entry")
            .find(".keysecondary");
        value ? keysecondary.show() : keysecondary.hide();
    });
    selectiveInput.prop("checked", entry.selective).trigger("input");
    selectiveInput.siblings(".checkbox_fancy").click(function () {
        $(this).siblings("input").click();
    });

    // constant
    const constantInput = template.find('input[name="constant"]');
    constantInput.data("uid", entry.uid);
    constantInput.on("input", function () {
        const uid = $(this).data("uid");
        const value = $(this).prop("checked");
        world_info_data.entries[uid].constant = value;
        saveWorldInfo();
    });
    constantInput.prop("checked", entry.constant).trigger("input");
    constantInput.siblings(".checkbox_fancy").click(function () {
        $(this).siblings("input").click();
    });

    // order
    const orderInput = template.find('input[name="order"]');
    orderInput.data("uid", entry.uid);
    orderInput.on("input", function () {
        const uid = $(this).data("uid");
        const value = Number($(this).val());

        world_info_data.entries[uid].order = !isNaN(value) ? value : 0;
        saveWorldInfo();
    });
    orderInput.val(entry.order).trigger("input");

    // position
    if (entry.position === undefined) {
        entry.position = 0;
    }

    const positionInput = template.find('input[name="position"]');
    positionInput.data("uid", entry.uid);
    positionInput.on("input", function () {
        const uid = $(this).data("uid");
        const value = Number($(this).val());
        world_info_data.entries[uid].position = !isNaN(value) ? value : 0;
        saveWorldInfo();
    });
    template
        .find(`input[name="position"][value=${entry.position}]`)
        .prop("checked", true)
        .trigger("input");

    // display uid
    template.find(".world_entry_form_uid_value").html(entry.uid);

    // delete button
    const deleteButton = template.find("input.delete_entry_button");
    deleteButton.data("uid", entry.uid);
    deleteButton.on("click", function () {
        const uid = $(this).data("uid");
        deleteWorldInfoEntry(uid);
        $(this).closest(".world_entry").remove();
        saveWorldInfo();
    });

    template.appendTo("#world_popup_entries_list");
    return template;
}

async function deleteWorldInfoEntry(uid) {
    if (!world_info_data || !("entries" in world_info_data)) {
        return;
    }

    delete world_info_data.entries[uid];
}

function createWorldInfoEntry() {
    const newEntryTemplate = {
        key: [],
        keysecondary: [],
        comment: "",
        content: "",
        constant: false,
        selective: false,
        order: 100,
        position: 0,
    };
    const newUid = getFreeWorldEntryUid();

    if (!Number.isInteger(newUid)) {
        console.error("Couldn't assign UID to a new entry");
        return;
    }

    const newEntry = { uid: newUid, ...newEntryTemplate };
    world_info_data.entries[newUid] = newEntry;

    const entryTemplate = appendWorldEntry(newEntry);
    entryTemplate.get(0).scrollIntoView({ behavior: "smooth" });
}

async function _save() {
    const response = await fetch("/editworldinfo", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
            "X-CSRF-Token": token,
        },
        body: JSON.stringify({ name: world_info, data: world_info_data }),
    });
}

async function saveWorldInfo(immediately) {
    if (!world_info || !world_info_data) {
        return;
    }


    if (immediately) {
        return await _save();
    }
    
    saveWorldDebounced();
}

async function renameWorldInfo() {
    const oldName = world_info;
    const newName = $("#world_popup_name").val();

    if (oldName === newName) {
        return;
    }

    world_info = newName;
    await saveWorldInfo(true);
    await deleteWorldInfo(oldName, newName);
}

async function deleteWorldInfo(worldInfoName, selectWorldName) {
    if (!world_names.includes(worldInfoName)) {
        return;
    }

    const response = await fetch("/deleteworldinfo", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
            "X-CSRF-Token": token,
        },
        body: JSON.stringify({ name: worldInfoName }),
    });

    if (response.ok) {
        await updateWorldInfoList();

        const selectedIndex = world_names.indexOf(selectWorldName);
        if (selectedIndex !== -1) {
            $("#world_info").val(selectedIndex).change();
        } else {
            $("#world_info").val("None").change();
        }

        hideWorldEditor();
    }
}

function getFreeWorldEntryUid() {
    if (!world_info_data || !("entries" in world_info_data)) {
        return null;
    }

    const MAX_UID = 1_000_000; // <- should be safe enough :)
    for (let uid = 0; uid < MAX_UID; uid++) {
        if (uid in world_info_data.entries) {
            continue;
        }
        return uid;
    }

    return null;
}

function getFreeWorldName() {
    const MAX_FREE_NAME = 100_000;
    for (let index = 1; index < MAX_FREE_NAME; index++) {
        const newName = `New World (${index})`;
        if (world_names.includes(newName)) {
            continue;
        }
        return newName;
    }

    return undefined;
}

async function createNewWorldInfo() {
    const worldInfoTemplate = { entries: {} };
    const worldInfoName = getFreeWorldName();

    if (!worldInfoName) {
        return;
    }

    world_info = worldInfoName;
    world_info_data = { ...worldInfoTemplate };
    await saveWorldInfo(true);
    await updateWorldInfoList();

    const selectedIndex = world_names.indexOf(worldInfoName);
    if (selectedIndex !== -1) {
        $("#world_info").val(selectedIndex).change();
    } else {
        $("#world_info").val("None").change();
    }
}

function checkWorldInfo(chat) {
    if (world_info_data.entries.length == 0) {
        return "";
    }

    const messagesToLookBack = world_info_depth * 2;
    let textToScan = chat.slice(0, messagesToLookBack).join("").toLowerCase();
    let worldInfoBefore = "";
    let worldInfoAfter = "";
    let needsToScan = true;
    let allActivatedEntries = new Set();

    const sortedEntries = Object.keys(world_info_data.entries)
        .map((x) => world_info_data.entries[x])
        .sort((a, b) => b.order - a.order);
    while (needsToScan) {
        let activatedNow = new Set();

        for (let entry of sortedEntries) {
            if (allActivatedEntries.has(entry.uid)) {
                continue;
            }

            if (entry.constant) {
                activatedNow.add(entry.uid);
            }

            if (Array.isArray(entry.key) && entry.key.length) {
                primary: for (let key of entry.key) {
                    if (key && textToScan.includes(key.trim().toLowerCase())) {
                        if (
                            entry.selective &&
                            Array.isArray(entry.keysecondary) &&
                            entry.keysecondary.length
                        ) {
                            secondary: for (let keysecondary of entry.keysecondary) {
                                if (
                                    keysecondary &&
                                    textToScan.includes(keysecondary.trim().toLowerCase())
                                ) {
                                    activatedNow.add(entry.uid);
                                    break secondary;
                                }
                            }
                        } else {
                            activatedNow.add(entry.uid);
                            break primary;
                        }
                    }
                }
            }
        }

        needsToScan = activatedNow.size > 0;
        const newEntries = [...activatedNow]
            .map((x) => world_info_data.entries[x])
            .sort((a, b) => sortedEntries.indexOf(a) - sortedEntries.indexOf(b));

        for (const entry of newEntries) {
            if (entry.position === world_info_position.after) {
                worldInfoAfter = `${substituteParams(
                    entry.content
                )}\n${worldInfoAfter}`;
            } else {
                worldInfoBefore = `${substituteParams(
                    entry.content
                )}\n${worldInfoBefore}`;
            }

            if (
                encode(worldInfoBefore + worldInfoAfter).length >= world_info_budget
            ) {
                needsToScan = false;
                break;
            }
        }

        if (needsToScan) {
            textToScan =
                newEntries
                    .map((x) => x.content)
                    .join("\n")
                    .toLowerCase() + textToScan;
        }

        allActivatedEntries = new Set([...allActivatedEntries, ...activatedNow]);
    }

    return { worldInfoBefore, worldInfoAfter };
}

function selectImportedWorldInfo() {
    if (!imported_world_name) {
        return;
    }

    world_names.forEach((item, i) => {
        if (item === imported_world_name) {
            $("#world_info").val(i).change();
        }
    });
    imported_world_name = "";
}

$(document).ready(() => {
    $("#world_info").change(async function () {
        const selectedWorld = $("#world_info").find(":selected").val();
        world_info = null;
        world_info_data = null;

        if (selectedWorld !== "None") {
            const worldIndex = Number(selectedWorld);
            world_info = !isNaN(worldIndex) ? world_names[worldIndex] : null;
            await loadWorldInfoData();
        }

        hideWorldEditor();
        saveSettingsDebounced();
    });

    //**************************WORLD INFO IMPORT EXPORT*************************//
    $("#world_import_button").click(function () {
        $("#world_import_file").click();
    });

    $("#world_import_file").on("change", function (e) {
        var file = e.target.files[0];

        if (!file) {
            return;
        }

        const ext = file.name.match(/\.(\w+)$/);
        if (!ext || ext[1].toLowerCase() !== "json") {
            return;
        }

        const formData = new FormData($("#form_world_import").get(0));

        jQuery.ajax({
            type: "POST",
            url: "/importworldinfo",
            data: formData,
            beforeSend: () => { },
            cache: false,
            contentType: false,
            processData: false,
            success: function (data) {
                if (data.name) {
                    imported_world_name = data.name;
                    updateWorldInfoList(imported_world_name);
                }
            },
            error: (jqXHR, exception) => { },
        });

        // Will allow to select the same file twice in a row
        $("#form_world_import").trigger("reset");
    });

    $("#world_info_edit_button").click(() => {
        is_world_edit_open ? hideWorldEditor() : showWorldEditor();
    });

    $("#world_popup_export").click(() => {
        if (world_info && world_info_data) {
            const jsonValue = JSON.stringify(world_info_data);
            const fileName = `${world_info}.json`;
            download(jsonValue, fileName, "application/json");
        }
    });

    $("#world_popup_delete").click(() => {
        callPopup("<h3>Delete the World Info?</h3>",  "del_world");
    });

    $("#world_popup_new").click(() => {
        createWorldInfoEntry();
    });

    $("#world_cross").click(() => {
        hideWorldEditor();
    });

    $("#world_popup_name_button").click(() => {
        renameWorldInfo();
    });

    $("#world_create_button").click(() => {
        createNewWorldInfo();
    });

    $(document).on("input", "#world_info_depth", function () {
        world_info_depth = Number($(this).val());
        $("#world_info_depth_counter").html(`${$(this).val()} Messages`);
        saveSettingsDebounced();
    });

    $(document).on("input", "#world_info_budget", function () {
        world_info_budget = Number($(this).val());
        $("#world_info_budget_counter").html(`${$(this).val()} Tokens`);
        saveSettingsDebounced();
    });
});