using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using AsbCloudApp.Data;
using AsbCloudApp.Repositories;
using AsbCloudApp.Services.Notifications;
using AsbCloudWebApi.SignalR.ConnectionManager;
using Microsoft.AspNetCore.SignalR;

namespace AsbCloudWebApi.SignalR.Services;

public class SignalRNotificationSender : INotificationSender
{
	private readonly IConnectionManager connectionManager;
	private readonly IHubContext<NotificationHub> notificationHubContext;
	private readonly INotificationRepository notificationRepository;

	public SignalRNotificationSender(IConnectionManager connectionManager,
		IHubContext<NotificationHub> notificationHubContext,
		INotificationRepository notificationRepository)
	{
		this.connectionManager = connectionManager;
		this.notificationHubContext = notificationHubContext;
		this.notificationRepository = notificationRepository;
	}
	
	public NotificationTransport NotificationTransport => NotificationTransport.SignalR;
	
	public async Task SendAsync(NotificationDto notification, 
		CancellationToken cancellationToken)
	{
		const string method = "notifications";
		
		var connectionId = connectionManager.GetConnectionIdByUserId(notification.IdUser);
					
		if (!string.IsNullOrWhiteSpace(connectionId))
		{
			await notificationHubContext.Clients.Client(connectionId)
				.SendAsync(method,
					notification,
					cancellationToken);
		
			notification.SentDate = DateTime.UtcNow;
			notification.NotificationState = NotificationState.Sent;
		}
		
		await notificationRepository.UpdateAsync(notification,
			cancellationToken);
	}

	public async Task SendRangeAsync(IEnumerable<NotificationDto> notifications, 
		CancellationToken cancellationToken)
	{
		foreach (var notification in notifications)
		{
			await SendAsync(notification,
				cancellationToken);
		}
	}
}