let PARSEC;
let AUDIO;
let DAEMON_WAITING = false;
let PEER_ID_C;

const PARSEC_ENV = {
	// user.bin
	bin_user_bin_get: function (asset_dir_c, session_id_c, size) {
		try {
			const cookies = document.cookie.split(';');

			for (let x = 0; x < cookies.length; x++) {
				const cookie = cookies[x].trim();
				const name = 'parsec_login=';

				if (cookie.indexOf(name) == 0) {
					const auth = JSON.parse(cookie.substring(name.length, cookie.length));
					MTY_StrToC(auth['token'], session_id_c, size);

					return 0;
				}
			}
		} catch (e) {
			console.error(e);
		}

		return -1;
	},
	bin_user_bin_set: function (asset_dir_c, session_id_c) {
		const session_id = MTY_StrToJS(session_id_c);

		const value = JSON.stringify({
			'token': session_id,
			'userId': 0,
		});

		const hostname = window.location.hostname.replace(/.*?\./, '');
		const secure = window.location.protocol == 'https:';
		document.cookie = 'parsec_login=' + value + ';domain=' + hostname + ';path=/;' +
			(secure ? 'secure' : '') + ';max-age=31536000;samesite=strict;';
	},
	bin_user_bin_delete: function (asset_dir_c) {
		const hostname = window.location.hostname.replace(/.*?\./, '');
		document.cookie = 'parsec_login=;domain=' + hostname + ';path=/;expires=Thu, 01 Jan 1970 00:00:00 GMT;';
	},


	// Audio control
	web_mute: function (muted) {
		AUDIO.muted = muted;
	},


	// ws-api
	signal_set_peer_id: function (s, attempt_id, peer_id) {
		if (!PARSEC)
			return;

		PARSEC.setPeerID(MTY_StrToJS(attempt_id), MTY_StrToJS(peer_id));
	},
	signal_get_peer_id: function (s, attempt_id) {
		if (!PARSEC)
			return;

		const peer_id = PARSEC.getPeerID(MTY_StrToJS(attempt_id));

		if (!PEER_ID_C)
			PEER_ID_C = MTY_Alloc(128);

		MTY_StrToC(peer_id, PEER_ID_C, 128);

		return PEER_ID_C;
	},
	signal_client_cancel: function (s, ps) {
		if (!PARSEC)
			return;

		PARSEC.sendCancel(PARSEC.getAttemptID());
		PARSEC_ENV.parsec_web_disconnect();
	},
	web_send_candex: function (attempt_id, ip, port, sync, fromStun, lan) {
		if (!PARSEC)
			return;

		PARSEC.sendCandidate(MTY_StrToJS(attempt_id),
			MTY_StrToJS(ip), port, sync, fromStun, lan);
	},
	signal_host_allow_guest: function (s, ps, attempt_id, allow) {
	},
	signal_host_stop: function (s, ps) {
	},
	signal_send_conn_update: function (s, ps) {
	},
	signal_host_set_permissions: function (s, ps, guest_id, perms) {
	},
	signal_host_start: function (s, ps, mode, cfg, priv, session_id) {
		return -1;
	},
	signal_host_set_config: function (s, ps, cfg, priv) {
	},
	signal_client_connect: function (s, ps, cfg, peer_id_c, session_id_c, secret_c) {
		//XXX TODO this should create a new attempt and send the offer

		const session_id = MTY_StrToJS(session_id_c);
		const peer_id = MTY_StrToJS(peer_id_c);
		const secret = MTY_StrToJS(secret_c);

		if (ps) {
			const connect = () => {
				if (!PARSEC) {
					setTimeout(connect, 100);

				} else {
					PARSEC.clientConnect(session_id, peer_id, secret);
					PARSEC.setPeerID(PARSEC.getAttemptID(), peer_id);
				}
			};

			connect();

		} else {
			window.location.assign('parsec://peer_id=' + peer_id + '&host_secret=' + secret);
		}

		return 0;
	},
	signal_init: function (s_out, role, host, port, loader_v, service_v, device_id, cbs, opaque) {
		const role_js = MTY_StrToJS(role);
		const host_js = MTY_StrToJS(host);

		// XXX TODO create context, but don't yet connect to websocket
	},
	signal_destroy: function (s_out) {
		// XXX TODO full clean up and null out context
	},
	signal_update: function (s, host, session_id) {
		const host_js = MTY_StrToJS(host);
		const session_id_js = MTY_StrToJS(session_id);

		// XXX TODO reconnect websocket with new session_id and websocket host

		return false;
	},
	signal_stop: function (s) {
		// XXX TODO Disconnect from websocket, clear message queue
	},


	// parsec SDK
	parsec_web_init: function () {
		if (PARSEC)
			return;

		AUDIO = document.createElement('audio');
		document.body.appendChild(AUDIO);

		const container = document.createElement('div');
		container.style.zIndex = -1;
		container.style.background = 'black';
		container.style.position = 'fixed';
		container.style.top = 0;
		container.style.right = 0;
		container.style.bottom = 0;
		container.style.left = 0;
		document.body.appendChild(container);

		const video = document.createElement('video');
		video.muted = true;
		video.style.width = '100%';
		video.style.height = '100%';
		container.appendChild(video);

		PARSEC = new Parsec(video, AUDIO);
	},
	parsec_web_destroy: function () {
		if (!PARSEC)
			return;

		PARSEC.destroy();
		PARSEC = undefined;
	},
	parsec_web_disconnect: function () {
		PARSEC.clientDisconnect();
	},
	parsec_web_get_status: function () {
		return DAEMON_WAITING ? PARSEC.Status.PARSEC_CONNECTING : PARSEC.clientGetStatus();
	},
	parsec_web_send_user_data: function (id, msg_c) {
		PARSEC.clientSendUserData(id, MTY_StrToJS(msg_c));
	},
	parsec_web_get_guests: function (jstr_c, len) {
		MTY_StrToC(JSON.stringify(PARSEC.clientGetGuests()), jstr_c, len);
	},
	parsec_web_get_attempt_id: function (attempt_id_c, len) {
		MTY_StrToC(PARSEC.getAttemptID(), attempt_id_c, len);
	},
	parsec_web_poll_events: function (event_str_c, len) {
		const event = PARSEC.clientPollEvents();

		if (event) {
			MTY_StrToC(JSON.stringify(event), event_str_c, len);
			return true;
		}

		return false;
	},
	parsec_web_get_buffer: function (key) {
		const buffer = PARSEC.getBuffer(key);

		if (buffer) {
			const ptr = MTY_Alloc(buffer.length);
			MTY_Memcpy(ptr, buffer);

			return ptr;
		}

		return 0;
	},
	parsec_web_set_log_callback: function (callback_c, opaque) {
		PARSEC.setLogCallback((level, msg) => {
			const msg_c = MTY_Alloc(1024);
			MTY_StrToC(msg, msg_c, 1024);

			MTY_CFunc(callback_c)(level, msg_c, opaque);
			MTY_Free(msg_c);
		});
	},
	parsec_web_send_message: function (msg_c) {
		const msg = JSON.parse(MTY_StrToJS(msg_c));

		PARSEC.clientSendMessage(msg);
	},
	parsec_web_get_metrics: function (decode_ptr, encode_ptr, network_ptr) {
		const metrics = PARSEC.clientGetMetrics();

		MTY_SetFloat(decode_ptr, metrics['decodeLatency']);
		MTY_SetFloat(encode_ptr, metrics['encodeLatency']);
		MTY_SetFloat(network_ptr, metrics['networkLatency']);
	},
	parsec_web_get_network_failure: function () {
		return PARSEC.clientNetworkFailure();
	},
	parsec_web_get_self: function (owner_ptr, id_ptr) {
		const me = PARSEC.clientGetSelf();

		MTY_SetInt8(owner_ptr, me['owner']);
		MTY_SetInt32(id_ptr, me['id']);
	},
	parsec_web_get_host_mode: function () {
		return PARSEC.clientGetHostMode();
	},
};