const toast = require('izitoast');
const cbor = require('borc');

const throttle = require('lodash/throttle');
const groupBy = require('lodash/groupBy');

const SOCKET_URL =
    `${window.location.protocol === 'https:' ? 'wss://' : 'ws://'}${window.location.host}/api/ws`;

function errorToast(err) {
    console.error(err);
    return toast.error({
        title: 'BEEP BOOP',
        message: err,
        position: 'topRight',
    });
}

function createSocket(events) {
    let ws;

    // // handle account auth within the socket itself
    // // https://www.christian-schneider.net/CrossSiteWebSocketHijacking.html
    // let account;
    // try {
    //     account = JSON.parse(localStorage.getItem('account'));
    // } catch (e) {
    //     localStorage.removeItem('account');
    // }

    // -------------
    //   Outgoing
    // -------------
    function send(msg) {
        if (msg[0] !== 'Ping') console.log('outgoing msg', msg);
        try {
            ws.send(cbor.encode(msg));
        } catch (e) {
            console.warn(e);
        }
    }

    let ping;
    function sendPing() {
        ping = Date.now();
        send(['Ping', {}]);
    }

    function sendAccountConstructs() {
        send(['AccountConstructs', {}]);
    }

    function sendAccountInstances() {
        send(['AccountInstances', {}]);
    }

    function sendAccountSetTeam(ids) {
        send(['AccountSetTeam', { ids }]);
    }

    function sendSubscriptionEnding(ending) {
        send(['SubscriptionEnding', { ending }]);
    }

    function sendGameState(id) {
        send(['GameState', { id }]);
    }

    function sendGameReady(id) {
        send(['GameReady', { id }]);
    }

    function sendInstanceState(instanceId) {
        send(['InstanceState', { instance_id: instanceId }]);
    }

    function sendInstanceChat(instanceId, index) {
        send(['InstanceChat', { instance_id: instanceId, index }]);
    }

    function sendVboxBuy(instanceId, group, index) {
        send(['VboxBuy', { instance_id: instanceId, group, index }]);
        events.clearInstance();
    }

    function sendVboxBuyEquip(instanceId, group, index, constructId) {
        send(['VboxBuy', { instance_id: instanceId, group, index, construct_id: constructId }]);
        events.clearInstance();
    }

    function sendVboxApply(instanceId, constructId, index) {
        send(['VboxApply', { instance_id: instanceId, construct_id: constructId, index }]);
        events.clearInstance();
    }

    function sendVboxUnequip(instanceId, constructId, target) {
        send(['VboxUnequip', { instance_id: instanceId, construct_id: constructId, target }]);
        events.clearInstance();
    }

    function sendVboxUnequipApply(instanceId, constructId, target, targetConstructId) {
        send(['VboxUnequipApply', { instance_id: instanceId, construct_id: constructId, target, target_construct_id: targetConstructId }]);
        events.clearInstance();
    }

    function sendVboxRefill(instanceId) {
        send(['VboxRefill', { instance_id: instanceId }]);
        events.clearInstance();
    }

    function sendVboxCombine(instanceId, invIndicies, vboxIndicies) {
        const formatted = {};
        vboxIndicies.forEach(p => formatted[p[0]] ? formatted[p[0]].push(p[1]) : formatted[p[0]] = [p[1]]);
        send(['VboxCombine', { instance_id: instanceId, inv_indices: invIndicies, vbox_indices: formatted }]);
        events.clearInstance();
    }

    function sendVboxRefund(instanceId, index) {
        send(['VboxRefund', { instance_id: instanceId, index }]);
        events.clearInstance();
    }

    function sendItemInfo() {
        send(['ItemInfo', {}]);
    }

    function sendGameSkill(gameId, constructId, targetConstructId, skill) {
        send(['GameSkill',
            { game_id: gameId, construct_id: constructId, target_construct_id: targetConstructId, skill },
        ]);
        events.setActiveSkill(null);
        events.clearTutorialGame();
    }

    function sendGameSkillClear(gameId) {
        send(['GameSkillClear', { game_id: gameId }]);
        events.setActiveSkill(null);
    }

    function sendGameOfferDraw(gameId) {
        send(['GameOfferDraw', { game_id: gameId }]);
        events.setActiveSkill(null);
    }

    function sendGameConcede(gameId) {
        send(['GameConcede', { game_id: gameId }]);
        events.setActiveSkill(null);
    }

    function sendGameTarget(gameId, constructId, skillId) {
        send(['GameTarget', { game_id: gameId, construct_id: constructId, skill_id: skillId }]);
        events.setActiveSkill(null);
    }

    function sendInstancePractice() {
        send(['InstancePractice', {}]);
    }

    function sendInstanceQueue() {
        send(['InstanceQueue', {}]);
    }

    function sendInstanceLeave() {
        send(['InstanceLeave', {}]);
    }

    function sendInstanceInvite() {
        send(['InstanceInvite', {}]);
    }

    function sendInstanceJoin(code) {
        send(['InstanceJoin', { code }]);
    }

    function sendInstanceReady(instanceId) {
        send(['InstanceReady', { instance_id: instanceId }]);
    }

    function sendInstanceAbandon(instanceId) {
        send(['InstanceAbandon', { instance_id: instanceId }]);
    }

    function sendMtxApply(constructId, mtx, name) {
        send(['MtxConstructApply', { construct_id: constructId, mtx, name }]);
        if (mtx === 'Rename') {
            events.clearMtxActive();
            events.clearConstructRename();
        }
    }

    function sendMtxAccountApply(mtx) {
        send(['MtxAccountApply', { mtx }]);
    }

    function sendMtxBuy(mtx) {
        send(['MtxBuy', { mtx }]);
    }

    function sendMtxConstructSpawn() {
        send(['MtxConstructSpawn', {}]);
    }

    function sendEmailState() {
        send(['EmailState', {}]);
    }

    function sendSubscriptionState() {
        send(['SubscriptionState', {}]);
    }

    // -------------
    //   Incoming
    // -------------
    function onAccount(login) {
        events.setAccount(login);
    }

    function onAccountShop(shop) {
        events.setShop(shop);
    }

    function onEmailState(v) {
        events.setEmail(v);
    }

    function onAccountInstances(list) {
        events.setAccountInstances(list);
    }

    function onAccountConstructs(constructs) {
        events.setConstructList(constructs);
    }

    function onAccountTeam(constructs) {
        events.setTeam(constructs);
    }

    function onSubscriptionState(sub) {
        // events.subscriptionState(`Subscription cancelled. Your subscription will remain active until ${exp}. Thank you for your support.`);
        events.setSubscription(sub);
    }

    function onConstructSpawn(construct) {
        events.setNewConstruct(construct);
    }

    function onGameState(game) {
        events.setGame(game);
    }

    function onInstanceState(instance) {
        events.setInstance(instance);
    }

    function onItemInfo(info) {
        events.setItemInfo(info);
    }

    function onDemo(v) {
        events.setDemo(v);
    }

    let pongTimeout;
    function onPong() {
        events.setPing(Date.now() - ping);
        pongTimeout = setTimeout(sendPing, 1000);
    }

    // -------------
    //   Setup
    // -------------

    // when the server sends a reply it will have one of these message types
    // this object wraps the reply types to a function
    const handlers = {
        AccountState: onAccount,
        AccountConstructs: onAccountConstructs,
        AccountTeam: onAccountTeam,
        AccountInstances: onAccountInstances,
        AccountShop: onAccountShop,
        SubscriptionState: onSubscriptionState,
        ConstructSpawn: onConstructSpawn,
        GameState: onGameState,
        EmailState: onEmailState,
        InstanceState: onInstanceState,
        ItemInfo: onItemInfo,
        Pong: onPong,
        Demo: onDemo,

        // QueueRequested: () => events.notify('PVP queue request received.'),
        QueueRequested: () => true,
        QueueJoined: () => {
            events.notify('You have joined the PVP queue.');
            events.setPvp(true);
        },
        QueueLeft: () => {
            events.notify('You have left the PVP queue.');
            events.setPvp(false);
        },
        QueueFound: () => events.notify('Your PVP game has started.'),
        InviteRequested: () => events.notify('PVP invite request received.'),
        Invite: code => events.setInvite(code),
        InstanceChat: chat => events.setInstanceChat(chat),
        ChatWheel: wheel => events.setChatWheel(wheel),
        // Joining: () => events.notify('Searching for instance...'),

        Processing: () => true,
        Error: errHandler,
    };

    function logout() {
        window.location.reload(true);
    }

    function errHandler(error) {
        switch (error) {
            case 'invalid token': return logout();
            case 'no constructs selected': return events.errorPrompt('select_constructs');
            case 'node requirements not met': return events.errorPrompt('complete_nodes');
            case 'construct at max skills (4)': return events.errorPrompt('max_skills');

            default: return errorToast(error);

        }
    }

    // decodes the cbor and
    // calls the handlers defined above based on message type
    function onMessage(event) {
        // decode binary msg from server
        const blob = new Uint8Array(event.data);
        const res = cbor.decode(blob);

        const [msgType, params] = res;
        if (msgType !== 'Pong') console.log(res);

        // check for error and split into response type and data
        if (!handlers[msgType]) return errorToast(`${msgType} handler missing`);
        return handlers[msgType](params);
    }

    // Connection opened
    function onOpen() {
        toast.info({
            message: 'connected',
            position: 'topRight',
        });

        sendPing();
        sendItemInfo();

        events.urlHashChange();

        return true;
    }

    function onError(event) {
        console.error('WebSocket error', event);
    }

    function onClose(event) {
        console.error('WebSocket closed', event);
        toast.warning({
            message: 'disconnected',
            position: 'topRight',
        });
        return setTimeout(connect, 5000);
    }

    function connect() {
        if (ws) {
            clearTimeout(pongTimeout);
            ws.removeEventListener('open', onOpen);
            ws.removeEventListener('message', onMessage);
            ws.removeEventListener('error', onError);
            ws.removeEventListener('close', onClose);
            ws = null;
        }

        ws = new WebSocket(SOCKET_URL);
        ws.binaryType = 'arraybuffer';

        // Listen for messages
        ws.addEventListener('open', onOpen);
        ws.addEventListener('message', onMessage);
        ws.addEventListener('error', onError);
        ws.addEventListener('close', onClose);

        return ws;
    }

    return {
        sendAccountConstructs,
        sendAccountInstances,
        sendAccountSetTeam,


        sendGameState,
        sendGameReady,
        sendGameSkill,
        sendGameSkillClear,
        sendGameOfferDraw,
        sendGameConcede,
        sendGameTarget,

        sendInstanceAbandon,
        // some weird shit happening in face off
        sendInstanceReady: throttle(sendInstanceReady, 500),
        sendInstancePractice,
        sendInstanceQueue,
        sendInstanceState,
        sendInstanceInvite,
        sendInstanceJoin,
        sendInstanceChat,
        sendInstanceLeave,

        sendVboxBuy,
        sendVboxBuyEquip,
        sendVboxApply,
        sendVboxRefund,
        sendVboxCombine,
        sendVboxRefill,
        sendVboxUnequip,
        sendVboxUnequipApply,

        sendItemInfo,

        sendEmailState,
        sendSubscriptionState,
        sendSubscriptionEnding,

        sendMtxAccountApply,
        sendMtxApply,
        sendMtxBuy,
        sendMtxConstructSpawn,

        connect,
    };
}

module.exports = createSocket;