function newUUID () {
	/* eslint-disable */
	return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
		const r = Math.random() * 16 | 0,
			v = c === 'x' ? r : r & 0x3 | 0x8;
		return v.toString(16);
	});
	/* eslint-enable */
}

const store = new Vuex.Store({
	state: {
		socket: {
			_session: localStorage.getItem('session'),
			isConnected: false,
			reconnectError: false,
			eventMSGID: {},
			eventTo: {},
		}
	},
	mutations:{
		SOCKET_ONOPEN (state, event)  {
			state.socket.isConnected = true
		},
		SOCKET_ONCLOSE (state, event)  {
			state.socket.isConnected = false
		},
		SOCKET_ONERROR (state, event)  {
			console.error(state, event)
		},
		// default handler called for all methods
		SOCKET_ONMESSAGE (state, msg)  {
			if (msg.subject === 'session_init') {
				if (state.socket._session === null) {
					state.socket._session = newUUID();
					localStorage.setItem('session', state.socket._session);
				}
				msg.id = state.socket._session;
				Vue.prototype.$socket.sendObj(msg);
				return;
			}

			const msgFunc = eventMSGID[msg.id];
			if (msgFunc) {
				msgFunc(msg);
				delete eventMSGID[msg.id];
				return;
			}

			const eventFuncs = eventTo[msg.subject];
			if (typeof eventFuncs === 'object' && eventFuncs.length > 0) {
				for (const key in eventFuncs) {
					const func = eventFuncs[key];
					if (func) {
						func(msg);
					}
				}
				return;
			}
			console.log(`unable to identify message: ${msg.subject}`);

		},
		// mutations for reconnect methods
		SOCKET_RECONNECT(state, count) {
			console.info(state, count)
		},
		SOCKET_RECONNECT_ERROR(state) {
			state.socket.reconnectError = true;
		},
		setEvent (state, to, func) {
			state.socket.eventTo[to] = [func];
		},
		addEvent (state, to, func) {
			if (typeof state.socket.eventTo[to] !== 'object') {
				state.socket.eventTo[to] = [];
			}
			state.socket.eventTo[to].push(func);
		},
		delEvent (state, to, func) {
			if (typeof state.socket.eventTo[to] === 'object' && eventTo[to].length > 1) {
				state.socket.eventTo[to].pop(func);
			} else {
				state.socket.eventTo[to] = [];
			}
		},
		call (state, msg, callback) {
			if (!msg.id) {
				msg.id = newUUID();
			}
			const ret = Vue.prototype.$socket.sendObj(msg);
			if (typeof callback === 'function') {
				state.socket.eventMSGID[msg.id] = callback;
			}
			return ret;
		}
	}
})