import { computed, reactive, ref, shallowReactive, watch } from 'vue';
import { defineStore } from 'pinia';


import {
    compareByCreatedAt,
    compareByDisplayName,
    compareByLocationAt,
    compareByName,
    compareByUpdatedAt,
    isRealInstance,
    parseLocation,
    replaceBioSymbols
} from '../shared/utils';
import { getAllUserMemos } from '../coordinators/memoCoordinator';
import { instanceRequest, userRequest } from '../api';
import { AppDebug } from '../services/appConfig';
import { database } from '../services/database';
import { runUpdateCurrentUserLocationFlow } from '../coordinators/locationCoordinator';
import { useAppearanceSettingsStore } from './settings/appearance';
import { useFriendStore } from './friend';
import { useInstanceStore } from './instance';
import { useLocationStore } from './location';
import { syncFriendSearchIndex } from '../coordinators/searchIndexCoordinator';
import { useUiStore } from './ui';
import { watchState } from '../services/watchState';

import * as workerTimers from 'worker-timers';

export const useUserStore = defineStore('User', () => {
    const appearanceSettingsStore = useAppearanceSettingsStore();
    const friendStore = useFriendStore();
    const locationStore = useLocationStore();
    const instanceStore = useInstanceStore();
    const uiStore = useUiStore();


    const currentUser = ref({
        acceptedPrivacyVersion: 0,
        acceptedTOSVersion: 0,
        accountDeletionDate: null,
        accountDeletionLog: null,
        activeFriends: [],
        ageVerificationStatus: '',
        ageVerified: false,
        allowAvatarCopying: false,
        badges: [],
        bio: '',
        bioLinks: [],
        currentAvatar: '',
        currentAvatarImageUrl: '',
        currentAvatarTags: [],
        currentAvatarThumbnailImageUrl: '',
        date_joined: '',
        developerType: '',
        discordDetails: {
            global_name: '',
            id: ''
        },
        discordId: '',
        displayName: '',
        emailVerified: false,
        fallbackAvatar: '',
        friendGroupNames: [],
        friendKey: '',
        friends: [],
        googleId: '',
        hasBirthday: false,
        hasDiscordFriendsOptOut: false,
        hasEmail: false,
        hasLoggedInFromClient: false,
        hasPendingEmail: false,
        hasSharedConnectionsOptOut: false,
        hideContentFilterSettings: false,
        homeLocation: '',
        id: '',
        isAdult: true,
        isBoopingEnabled: false,
        isFriend: false,
        last_activity: '',
        last_login: '',
        last_mobile: null,
        last_platform: '',
        obfuscatedEmail: '',
        obfuscatedPendingEmail: '',
        oculusId: '',
        offlineFriends: [],
        onlineFriends: [],
        pastDisplayNames: [],
        picoId: '',
        presence: {
            avatarThumbnail: '',
            currentAvatarTags: '',
            debugflag: '',
            displayName: '',
            groups: [],
            id: '',
            instance: '',
            instanceType: '',
            platform: '',
            profilePicOverride: '',
            status: '',
            travelingToInstance: '',
            travelingToWorld: '',
            userIcon: '',
            world: ''
        },
        profilePicOverride: '',
        profilePicOverrideThumbnail: '',
        pronouns: '',
        queuedInstance: '',
        state: '',
        status: '',
        statusDescription: '',
        statusFirstTime: false,
        statusHistory: [],
        steamDetails: {},
        steamId: '',
        tags: [],
        twoFactorAuthEnabled: false,
        twoFactorAuthEnabledDate: null,
        unsubscribe: false,
        updated_at: '',
        userIcon: '',
        userLanguage: '',
        userLanguageCode: '',
        username: '',
        viveId: '',
        // VRCX
        $online_for: Date.now(),
        $offline_for: null,
        $location_at: Date.now(),
        $travelingToTime: Date.now(),
        $previousAvatarSwapTime: null,
        $homeLocation: {},
        $isVRCPlus: false,
        $isModerator: false,
        $isTroll: false,
        $isProbableTroll: false,
        $trustLevel: 'Visitor',
        $trustClass: 'x-tag-untrusted',
        $userColour: '',
        $trustSortNum: 1,
        $languages: [],
        $locationTag: '',
        $travelingToLocation: ''
    });

    const userDialog = ref({
        visible: false,
        loading: false,
        activeTab: 'Info',
        lastActiveTab: 'Info',
        id: '',
        ref: {},
        friend: {},
        isFriend: false,
        note: '',
        incomingRequest: false,
        outgoingRequest: false,
        isBlock: false,
        isMute: false,
        isHideAvatar: false,
        isShowAvatar: false,
        isInteractOff: false,
        isMuteChat: false,
        isFavorite: false,
        $location: {},
        $homeLocationName: '',
        users: [],
        instance: {
            id: '',
            tag: '',
            $location: {},
            friendCount: 0,
            users: [],
            shortName: '',
            ref: {}
        },
        worlds: [],
        avatars: [],
        isWorldsLoading: false,
        isFavoriteWorldsLoading: false,
        isAvatarsLoading: false,
        isGroupsLoading: false,
        userFavoriteWorlds: [],
        userGroups: {
            groups: [],
            ownGroups: [],
            mutualGroups: [],
            remainingGroups: []
        },

        worldSorting: {
            name: 'dialog.user.worlds.sorting.updated',
            value: 'updated'
        },
        worldOrder: {
            name: 'dialog.user.worlds.order.descending',
            value: 'descending'
        },
        groupSorting: {
            name: 'dialog.user.groups.sorting.alphabetical',
            value: 'alphabetical'
        },
        mutualFriendSorting: {
            name: 'dialog.user.mutual_friends.sorting.alphabetical',
            value: 'alphabetical'
        },
        avatarSorting: 'update',
        avatarReleaseStatus: 'all',
        memo: '',
        $avatarInfo: {
            ownerId: '',
            avatarName: '',
            fileCreatedAt: ''
        },
        representedGroup: {
            bannerId: '',
            bannerUrl: '',
            description: '',
            discriminator: '',
            groupId: '',
            iconUrl: '',
            id: '',
            isRepresenting: false,
            memberCount: 0,
            memberVisibility: '',
            name: '',
            ownerId: '',
            privacy: '',
            shortCode: '',
            $thumbnailUrl: '',
            $memberId: ''
        },
        isRepresentedGroupLoading: false,
        joinCount: 0,
        timeSpent: 0,
        lastSeen: '',
        avatarModeration: 0,
        previousDisplayNames: [],
        dateFriended: '',
        unFriended: false,
        dateFriendedInfo: [],
        mutualFriendCount: 0,
        mutualGroupCount: 0,
        mutualFriends: [],
        isMutualFriendsLoading: false
    });

    const currentTravelers = reactive(new Map());
    const subsetOfLanguages = ref([]);
    const languageDialog = ref({
        visible: false,
        loading: false,
        languageChoice: false,
        languages: []
    });
    const sendBoopDialog = ref({
        visible: false,
        userId: ''
    });
    const showUserDialogHistory = reactive(new Set());
    const customUserTags = reactive(new Map());

    const state = reactive({
        instancePlayerCount: new Map(),
        lastNoteCheck: null,
        lastDbNoteDate: null,
        notes: new Map()
    });

    const cachedUsers = shallowReactive(new Map());
    const cachedUserIdsByDisplayName = shallowReactive(new Map());

    function addCachedUserDisplayNameEntry(displayName, userId) {
        if (!displayName || !userId) {
            return;
        }
        let userIds = cachedUserIdsByDisplayName.get(displayName);
        if (!userIds) {
            userIds = new Set();
            cachedUserIdsByDisplayName.set(displayName, userIds);
        }
        userIds.add(userId);
    }

    function removeCachedUserDisplayNameEntry(displayName, userId) {
        if (!displayName || !userId) {
            return;
        }
        const userIds = cachedUserIdsByDisplayName.get(displayName);
        if (!userIds) {
            return;
        }
        userIds.delete(userId);
        if (userIds.size === 0) {
            cachedUserIdsByDisplayName.delete(displayName);
        }
    }

    function syncCachedUserDisplayName(ref, previousDisplayName = '') {
        if (!ref?.id) {
            return;
        }
        if (previousDisplayName && previousDisplayName !== ref.displayName) {
            removeCachedUserDisplayNameEntry(previousDisplayName, ref.id);
        }
        addCachedUserDisplayNameEntry(ref.displayName, ref.id);
    }

    function setCachedUser(
        ref,
        previousDisplayName = '',
        { skipIndex = false } = {}
    ) {
        if (!ref?.id) {
            return;
        }
        cachedUsers.set(ref.id, ref);
        if (!skipIndex) {
            syncCachedUserDisplayName(ref, previousDisplayName);
        }
    }

    function deleteCachedUser(userId) {
        const ref = cachedUsers.get(userId);
        if (!ref) {
            return false;
        }
        removeCachedUserDisplayNameEntry(ref.displayName, userId);
        return cachedUsers.delete(userId);
    }

    function clearCachedUsers() {
        cachedUsers.clear();
        cachedUserIdsByDisplayName.clear();
    }

    function rebuildCachedUserDisplayNameIndex() {
        cachedUserIdsByDisplayName.clear();
        for (const ref of cachedUsers.values()) {
            addCachedUserDisplayNameEntry(ref.displayName, ref.id);
        }
    }

    const isLocalUserVrcPlusSupporter = computed(
        () => currentUser.value.$isVRCPlus || AppDebug.debugVrcPlus
    );

    watch(
        () => watchState.isLoggedIn,
        (isLoggedIn) => {
            if (!isLoggedIn) {
                currentTravelers.clear();
                showUserDialogHistory.clear();
                state.instancePlayerCount.clear();
                customUserTags.clear();
                state.notes.clear();
                subsetOfLanguages.value = [];
                uiStore.clearDialogCrumbs();
            }
        },
        { flush: 'sync' }
    );

    watch(
        () => watchState.isFriendsLoaded,
        (isFriendsLoaded) => {
            if (isFriendsLoaded) {
                getAllUserMemos();
                initUserNotes();
            }
        },
        { flush: 'sync' }
    );

    /**
     * @param {object} ref
     */
    function applyUserLanguage(ref) {
        if (!ref || !ref.tags || !subsetOfLanguages.value) {
            return;
        }

        ref.$languages = [];
        const languagePrefix = 'language_';
        const prefixLength = languagePrefix.length;

        for (const tag of ref.tags) {
            if (tag.startsWith(languagePrefix)) {
                const key = tag.substring(prefixLength);
                const value = subsetOfLanguages.value[key];

                if (value !== undefined) {
                    ref.$languages.push({ key, value });
                }
            }
        }
    }

    /**
     * @param {object} ref
     */
    function applyPresenceLocation(ref) {
        const presence = ref.presence;
        if (isRealInstance(presence.world)) {
            ref.$locationTag = `${presence.world}:${presence.instance}`;
        } else {
            ref.$locationTag = presence.world;
        }
        if (isRealInstance(presence.travelingToWorld)) {
            ref.$travelingToLocation = `${presence.travelingToWorld}:${presence.travelingToInstance}`;
        } else {
            ref.$travelingToLocation = presence.travelingToWorld;
        }
        runUpdateCurrentUserLocationFlow();
    }

    /**
     * @param {boolean} updateInstanceOccupants
     */
    function applyUserDialogLocation(updateInstanceOccupants = false) {
        let addUser;
        let friend;
        let ref;
        const D = userDialog.value;
        if (!D.visible) {
            return;
        }
        const L = parseLocation(D.ref.$location?.tag);
        if (updateInstanceOccupants && L.isRealInstance) {
            instanceRequest.getInstance({
                worldId: L.worldId,
                instanceId: L.instanceId
            });
        }
        D.$location = L;
        L.user = {};
        if (L.userId) {
            ref = cachedUsers.get(L.userId);
            if (typeof ref === 'undefined') {
                userRequest
                    .getUser({
                        userId: L.userId
                    })
                    .then((args) => {
                        if (args.ref.id === L.userId) {
                            Object.assign(L.user, args.ref);
                            D.$location = L;
                            applyUserDialogLocation();
                        }
                    });
            } else {
                L.user = ref;
            }
        }
        const users = [];
        let friendCount = 0;
        const playersInInstance = locationStore.lastLocation.playerList;
        const cachedCurrentUser = cachedUsers.get(currentUser.value.id);
        const currentLocation = cachedCurrentUser?.$location?.tag;
        if (!L.isOffline && currentLocation === L.tag) {
            ref = cachedUsers.get(currentUser.value.id);
            if (typeof ref !== 'undefined') {
                users.push(ref); // add self
            }
        }
        // dont use gamelog when using api location
        if (
            locationStore.lastLocation.location === L.tag &&
            playersInInstance.size > 0
        ) {
            const friendsInInstance = locationStore.lastLocation.friendList;
            for (friend of friendsInInstance.values()) {
                // if friend isn't in instance add them
                addUser = !users.some(function (user) {
                    return friend.userId === user.id;
                });
                if (addUser) {
                    ref = cachedUsers.get(friend.userId);
                    if (typeof ref !== 'undefined') {
                        users.push(ref);
                    }
                }
            }
            friendCount = users.length - 1;
        }
        if (!L.isOffline) {
            for (friend of friendStore.friends.values()) {
                if (typeof friend.ref === 'undefined') {
                    continue;
                }
                if (
                    friend.ref.location === locationStore.lastLocation.location
                ) {
                    // don't add friends to currentUser gameLog instance (except when traveling)
                    continue;
                }
                if (friend.ref.$location.tag === L.tag) {
                    if (
                        friend.state !== 'online' &&
                        friend.ref.location === 'private'
                    ) {
                        // don't add offline friends to private instances
                        continue;
                    }
                    // if friend isn't in instance add them
                    addUser = !users.some(function (user) {
                        return friend.name === user.displayName;
                    });
                    if (addUser) {
                        users.push(friend.ref);
                    }
                }
            }
            friendCount = users.length;
        }
        if (appearanceSettingsStore.instanceUsersSortAlphabetical) {
            users.sort(compareByDisplayName);
        } else {
            users.sort(compareByLocationAt);
        }
        D.users = users;
        if (
            (L.worldId &&
                currentLocation === L.tag &&
                playersInInstance.size > 0) ||
            !L.isRealInstance
        ) {
            D.instance = {
                id: L.instanceId,
                tag: L.tag,
                $location: L,
                friendCount: 0,
                users: [],
                shortName: '',
                ref: {}
            };
        }
        const instanceRef = instanceStore.cachedInstances.get(L.tag) || {};
        Object.assign(D.instance.ref, instanceRef);
        D.instance.friendCount = friendCount;
    }

    /**
     * @param array
     */
    function sortUserDialogAvatars(array) {
        const D = userDialog.value;
        if (D.avatarSorting === 'update') {
            array.sort(compareByUpdatedAt);
        } else if (D.avatarSorting === 'createdAt') {
            array.sort(compareByCreatedAt);
        } else {
            array.sort(compareByName);
        }
        D.avatars = array;
    }

    /**
     */
    async function initUserNotes() {
        state.lastNoteCheck = new Date();
        state.lastDbNoteDate = null;
        state.notes.clear();
        try {
            const users = cachedUsers;
            const dbNotes = await database.getAllUserNotes();
            for (const note of dbNotes) {
                state.notes.set(note.userId, note.note);
                const user = users.get(note.userId);
                if (user) {
                    user.note = note.note;
                    const friendCtx = friendStore.friends.get(note.userId);
                    if (friendCtx) {
                        syncFriendSearchIndex(friendCtx);
                    }
                }
                if (
                    !state.lastDbNoteDate ||
                    state.lastDbNoteDate < note.createdAt
                ) {
                    state.lastDbNoteDate = note.createdAt;
                }
            }
            await getLatestUserNotes();
        } catch (error) {
            console.error('Error initializing user notes:', error);
        }
    }

    /**
     */
    async function getLatestUserNotes() {
        state.lastNoteCheck = new Date();
        const params = {
            offset: 0,
            n: 10
        };
        const newNotes = new Map();
        let done = false;
        try {
            for (let i = 0; i < 100; i++) {
                params.offset = i * params.n;
                const args = await userRequest.getUserNotes(params);
                for (const note of args.json) {
                    if (
                        state.lastDbNoteDate &&
                        state.lastDbNoteDate > note.createdAt
                    ) {
                        done = true;
                    }
                    if (
                        !state.lastDbNoteDate ||
                        state.lastDbNoteDate < note.createdAt
                    ) {
                        state.lastDbNoteDate = note.createdAt;
                    }
                    note.note = replaceBioSymbols(note.note);
                    newNotes.set(note.targetUserId, note);
                }
                if (done || args.json.length === 0) {
                    break;
                }
                params.n = 100;
                await new Promise((resolve) => {
                    workerTimers.setTimeout(resolve, 1000);
                });
            }
        } catch (error) {
            console.error('Error fetching user notes:', error);
        }
        const users = cachedUsers;

        for (const note of newNotes.values()) {
            const newNote = {
                userId: note.targetUserId,
                displayName: note.targetUser?.displayName || note.targetUserId,
                note: note.note,
                createdAt: note.createdAt
            };
            await database.addUserNote(newNote);
            state.notes.set(note.targetUserId, note.note);
            const user = users.get(note.targetUserId);
            if (user) {
                user.note = note.note;
                const friendCtx = friendStore.friends.get(note.targetUserId);
                if (friendCtx) {
                    syncFriendSearchIndex(friendCtx);
                }
            }
        }
    }

    /**
     * @param userId
     * @param newNote
     */
    async function checkNote(userId, newNote) {
        if (
            !state.lastNoteCheck ||
            state.lastNoteCheck.getTime() + 5 * 60 * 1000 > Date.now()
        ) {
            return;
        }
        const existingNote = state.notes.get(userId);
        if (typeof existingNote !== 'undefined' && !newNote) {
            console.log('deleting note', userId);
            state.notes.delete(userId);
            await database.deleteUserNote(userId);
            return;
        }
        if (typeof existingNote === 'undefined' || existingNote !== newNote) {
            console.log('detected note change', userId, newNote);
            await getLatestUserNotes();
        }
    }

    /**
     * @param userId
     */
    function showSendBoopDialog(userId) {
        sendBoopDialog.value.userId = userId;
        sendBoopDialog.value.visible = true;
    }

    /**
     * @param {string} value
     */
    function setUserDialogMemo(value) {
        userDialog.value.memo = value;
    }

    /**
     * @param {boolean} value
     */
    function setUserDialogVisible(value) {
        userDialog.value.visible = value;
    }

    /**
     * @param {boolean} value
     */
    function setUserDialogIsFavorite(value) {
        userDialog.value.isFavorite = value;
    }

    /**
     * @param {string} value
     */
    function setCurrentUserColour(value) {
        currentUser.value.$userColour = value;
    }

    /**
     * @param {string} location
     * @param {string} travelingToLocation
     * @param {number} timestamp
     */
    function setCurrentUserLocationState(
        location,
        travelingToLocation,
        timestamp = Date.now()
    ) {
        currentUser.value.$location_at = timestamp;
        currentUser.value.$travelingToTime = timestamp;
        currentUser.value.$locationTag = location;
        currentUser.value.$travelingToLocation = travelingToLocation;
    }

    /**
     * @param {number} value
     */
    function setCurrentUserTravelingToTime(value) {
        currentUser.value.$travelingToTime = value;
    }

    /**
     * @param {object} value
     */
    function setCurrentUser(value) {
        currentUser.value = value;
    }

    /**
     * @param {object} value
     */
    function setSubsetOfLanguages(value) {
        subsetOfLanguages.value = value;
    }

    /**
     * @param {Array} value
     */
    function setLanguageDialogLanguages(value) {
        languageDialog.value.languages = value;
    }

    /**
     */
    function markCurrentUserGameStarted() {
        currentUser.value.$online_for = Date.now();
        currentUser.value.$offline_for = '';
        currentUser.value.$previousAvatarSwapTime = Date.now();
    }

    /**
     */
    function markCurrentUserGameStopped() {
        currentUser.value.$online_for = 0;
        currentUser.value.$offline_for = Date.now();
        currentUser.value.$previousAvatarSwapTime = null;
    }

    /**
     */
    function toggleSharedConnectionsOptOut() {
        userRequest.saveCurrentUser({
            hasSharedConnectionsOptOut:
                !currentUser.value.hasSharedConnectionsOptOut
        });
    }

    /**
     */
    function toggleDiscordFriendsOptOut() {
        userRequest.saveCurrentUser({
            hasDiscordFriendsOptOut: !currentUser.value.hasDiscordFriendsOptOut
        });
    }

    return {
        state,

        currentUser,
        currentTravelers,
        userDialog,
        subsetOfLanguages,
        languageDialog,
        sendBoopDialog,
        showUserDialogHistory,
        customUserTags,
        cachedUsers,
        cachedUserIdsByDisplayName,
        isLocalUserVrcPlusSupporter,
        applyUserLanguage,
        applyPresenceLocation,
        applyUserDialogLocation,
        setCachedUser,
        syncCachedUserDisplayName,
        deleteCachedUser,
        clearCachedUsers,
        rebuildCachedUserDisplayNameIndex,
        sortUserDialogAvatars,
        initUserNotes,
        showSendBoopDialog,
        setUserDialogMemo,
        setUserDialogVisible,
        setUserDialogIsFavorite,
        setCurrentUserColour,
        setCurrentUserLocationState,
        setCurrentUserTravelingToTime,
        setCurrentUser,
        setSubsetOfLanguages,
        setLanguageDialogLanguages,
        markCurrentUserGameStarted,
        markCurrentUserGameStopped,
        checkNote,
        toggleSharedConnectionsOptOut,
        toggleDiscordFriendsOptOut
    };
});