import { getAuthToken, getItem } from "./storage";

export const GatewayPayloadType = {
    Hello: 0,
    Authenticate: 1,
    Ready: 2,
    Ping: 3,

    ChannelCreate: 110,
    ChannelUpdate: 111,
    ChannelDelete: 112,

    MessageCreate: 120,
    MessageUpdate: 121,
    MessageDelete: 122,
}

export default {
    ws: null,
    authenticated: false,
    heartbeatInterval: null,
    user: null,
    channels: null,
    reconnectDelay: 400,
    reconnectTimeout: null,
    init() {
        const token = getAuthToken();
        if (!token) {
            return false;
        }
        this.ws = new WebSocket(getItem("gatewayBase"));
        this.ws.onopen = () => {
            if (this.reconnectTimeout) {
                clearTimeout(this.reconnectTimeout);
            }
            this.reconnectDelay = 400;
        };
        this.ws.onmessage = (event) => {
            const payload = JSON.parse(event.data);

            switch (payload.t) {
                case GatewayPayloadType.Hello: {
                    this.send({
                        t: GatewayPayloadType.Authenticate,
                        d: token
                    });

                    this.heartbeatInterval = setInterval(() => {
                        this.send({
                            t: GatewayPayloadType.Ping,
                            d: 0
                        });
                    }, payload.d.pingInterval);
                    break;
                }
                case GatewayPayloadType.Ready: {
                    this.user = payload.d.user;
                    this.channels = payload.d.channels;
                    break;
                }
            }
        };
        this.ws.onclose = () => {
            this.reconnectDelay *= 2;
            this.authenticated = false;
            this.user = null;
            this.channels = null;
            if (this.heartbeatInterval) {
                clearInterval(this.heartbeatInterval);
            }
            this.reconnectTimeout = setTimeout(() => {
                this.init();
            }, this.reconnectDelay);
        };

        return true;
    },
    send(data) {
        return this.ws.send(JSON.stringify(data));
    }
};