/**
 * Video Connection System using Svelte 5 Runes
 * Clean and simple video producer/consumer management
 */

import { video } from "@robothub/transport-server-client";
import type { video as videoTypes } from "@robothub/transport-server-client";
import { settings } from "$lib/runes/settings.svelte";

// Simple connection state using runes
export class VideoConnectionState {
	// Producer state
	producer = $state({
		connected: false,
		client: null as videoTypes.VideoProducer | null,
		roomId: null as string | null,
		stream: null as MediaStream | null
	});

	// Consumer state
	consumer = $state({
		connected: false,
		client: null as videoTypes.VideoConsumer | null,
		roomId: null as string | null,
		stream: null as MediaStream | null
	});

	// Room listing state
	rooms = $state<videoTypes.RoomInfo[]>([]);
	roomsLoading = $state(false);

	// Derived state
	get hasProducer() {
		return this.producer.connected;
	}

	get hasConsumer() {
		return this.consumer.connected;
	}

	get isStreaming() {
		return this.hasProducer && this.producer.stream !== null;
	}

	get canConnectConsumer() {
		return this.hasProducer && this.producer.roomId !== null;
	}
}

// Create global instance
export const videoConnection = new VideoConnectionState();

// External action functions
export const videoActions = {
	// Room management
	async listRooms(workspaceId: string): Promise<videoTypes.RoomInfo[]> {
		videoConnection.roomsLoading = true;
		try {
			const client = new video.VideoClientCore(settings.transportServerUrl);
			const rooms = await client.listRooms(workspaceId);
			videoConnection.rooms = rooms;
			return rooms;
		} catch (error) {
			console.error("Failed to list rooms:", error);
			videoConnection.rooms = [];
			return [];
		} finally {
			videoConnection.roomsLoading = false;
		}
	},

	async createRoom(workspaceId: string, roomId?: string): Promise<string | null> {
		try {
			const client = new video.VideoClientCore(settings.transportServerUrl);
			const result = await client.createRoom(workspaceId, roomId);
			if (result) {
				// Refresh room list
				await this.listRooms(workspaceId);
				return result.roomId;
			}
			return null;
		} catch (error) {
			console.error("Failed to create room:", error);
			return null;
		}
	},

	async deleteRoom(workspaceId: string, roomId: string): Promise<boolean> {
		try {
			const client = new video.VideoClientCore(settings.transportServerUrl);
			await client.deleteRoom(workspaceId, roomId);
			// Refresh room list
			await this.listRooms(workspaceId);
			return true;
		} catch (error) {
			console.error("Failed to delete room:", error);
			return false;
		}
	},

	// Producer actions (simplified - only remote/local camera)
	async connectProducer(
		workspaceId: string
	): Promise<{ success: boolean; error?: string; roomId?: string }> {
		try {
			const producer = new video.VideoProducer(settings.transportServerUrl);

			// Create or join room
			const roomData = await producer.createRoom(workspaceId);
			const connected = await producer.connect(roomData.workspaceId, roomData.roomId);

			if (!connected) {
				throw new Error("Failed to connect producer");
			}

			// Start camera stream
			const stream = await producer.startCamera({
				video: { width: 1280, height: 720 },
				audio: true
			});

			// Update state
			videoConnection.producer.connected = true;
			videoConnection.producer.client = producer;
			videoConnection.producer.roomId = roomData.roomId;
			videoConnection.producer.stream = stream;

			// Refresh room list
			await this.listRooms(workspaceId);

			return { success: true, roomId: roomData.roomId };
		} catch (error) {
			console.error("Failed to connect producer:", error);
			return { success: false, error: error instanceof Error ? error.message : String(error) };
		}
	},

	async disconnectProducer(): Promise<void> {
		if (videoConnection.producer.client) {
			videoConnection.producer.client.disconnect();
		}
		if (videoConnection.producer.stream) {
			videoConnection.producer.stream.getTracks().forEach((track) => track.stop());
		}

		// Reset state
		videoConnection.producer.connected = false;
		videoConnection.producer.client = null;
		videoConnection.producer.roomId = null;
		videoConnection.producer.stream = null;
	},

	// Consumer actions (simplified - only remote consumer)
	async connectConsumer(
		workspaceId: string,
		roomId: string
	): Promise<{ success: boolean; error?: string }> {
		try {
			const consumer = new video.VideoConsumer(settings.transportServerUrl);
			const connected = await consumer.connect(workspaceId, roomId);

			if (!connected) {
				throw new Error("Failed to connect consumer");
			}

			// Start receiving video
			await consumer.startReceiving();

			// Set up stream receiving
			consumer.on("streamReceived", (stream: MediaStream) => {
				videoConnection.consumer.stream = stream;
			});

			// Update state
			videoConnection.consumer.connected = true;
			videoConnection.consumer.client = consumer;
			videoConnection.consumer.roomId = roomId;

			return { success: true };
		} catch (error) {
			console.error("Failed to connect consumer:", error);
			return { success: false, error: error instanceof Error ? error.message : String(error) };
		}
	},

	async disconnectConsumer(): Promise<void> {
		if (videoConnection.consumer.client) {
			videoConnection.consumer.client.disconnect();
		}

		// Reset state
		videoConnection.consumer.connected = false;
		videoConnection.consumer.client = null;
		videoConnection.consumer.roomId = null;
		videoConnection.consumer.stream = null;
	},

	// Utility functions
	async refreshRooms(workspaceId: string): Promise<void> {
		await this.listRooms(workspaceId);
	},

	getAvailableRooms(): videoTypes.RoomInfo[] {
		return videoConnection.rooms.filter((room) => room.participants.producer !== null);
	},

	getRoomById(roomId: string): videoTypes.RoomInfo | undefined {
		return videoConnection.rooms.find((room) => room.id === roomId);
	}
};