import { serverApi } from "helpers/axios";
import {
	handleActiveSpeakerChange,
	handleDisconnect,
	handleLocalTrackUnpublished,
	handleTrackSubscribed,
	handleTrackUnsubscribed,
} from "helpers/liveKitEventHandler";
import { ConnectionQuality, Room, RoomEvent } from "livekit-client";
import { create } from "zustand";

let interval: NodeJS.Timeout;

type TalkState = {
	isTalking: boolean;
	state: "connecting" | "connected" | "disconnected" | "error";
	message: string | null;
	connectionQuality: ConnectionQuality;
	remoteParticipants: number;
	toggleTalking: () => void;

	connect: (roomName: string) => void;
	disconnect: () => void;
	room: Room | null;
};
const getToken = async (roomName: string) => {
	const response = await serverApi.get(`/livekit/token?roomName=${roomName}`);
	const data = response.data;
	return data.token;
};

export const useAudioStore = create<TalkState>((set, get) => ({
	isTalking: false,
	message: null,
	state: "disconnected",
	remoteParticipants: 0,
	connectionQuality: ConnectionQuality.Unknown,
	room: null,
	toggleTalking: () => set((state) => ({ isTalking: !state.isTalking })),
	connect: async (roomName) => {
		set({ state: "connecting" });
		console.log("Connecting to room: ", roomName);
		try {
			// Clean old room
			const connectedRoom = get().room;
			if (interval) clearInterval(interval);
			if (connectedRoom) {
				connectedRoom.disconnect();
				connectedRoom.removeAllListeners();
			}

			const url = process.env.NEXT_PUBLIC_LIVEKIT_URL;
			if (!url) return console.error("NEXT_PUBLIC_LIVEKIT_URL not set");

			const token = await getToken(roomName);
			if (!token) throw new Error("Fehlende Berechtigung");
			const room = new Room({});
			await room.prepareConnection(url, token);
			room
				// Connection events
				.on(RoomEvent.Connected, () => {
					set({ state: "connected", room, message: null });
				})
				.on(RoomEvent.Disconnected, () => {
					set({ state: "disconnected" });

					handleDisconnect();
				})
				.on(RoomEvent.ConnectionQualityChanged, (connectionQuality) =>
					set({ connectionQuality }),
				)

				// Track events
				.on(RoomEvent.TrackSubscribed, handleTrackSubscribed)
				.on(RoomEvent.TrackUnsubscribed, handleTrackUnsubscribed)
				.on(RoomEvent.ActiveSpeakersChanged, handleActiveSpeakerChange)
				.on(RoomEvent.LocalTrackUnpublished, handleLocalTrackUnpublished);
			await room.connect(url, token);
			console.log(room);
			set({ room });
			interval = setInterval(() => {
				set({
					remoteParticipants:
						room.numParticipants === 0 ? 0 : room.numParticipants - 1, // Unreliable and delayed
				});
			}, 500);
		} catch (error: Error | unknown) {
			console.error("Error occured: ", error);
			if (error instanceof Error) {
				set({ state: "error", message: error.message });
			} else {
				set({ state: "error", message: "Unknown error" });
			}
		}
	},
	disconnect: () => {
		get().room?.disconnect();
	},
}));