using System;
using System.Threading;
using System.Threading.Tasks;
using AsbCloudApp.Data;
using AsbCloudApp.Exceptions;
using AsbCloudApp.Repositories;
using AsbCloudApp.Services.Notifications;

namespace AsbCloudInfrastructure.Services.Notifications;

public class NotificationService : INotificationService
{
	private readonly INotificationSenderManager notificationSenderManager;
	private readonly INotificationRepository notificationRepository;

	public NotificationService(INotificationSenderManager notificationSenderManager,
		INotificationRepository notificationRepository)
	{
		this.notificationSenderManager = notificationSenderManager;
		this.notificationRepository = notificationRepository;
	}

	public async Task NotifyAsync(int idUser,
		int idNotificationCategory,
		string title,
		string message,
		TimeSpan timeToLife,
		NotificationTransport notificationTransport,
		CancellationToken cancellationToken)
	{
		NotificationDto notification = new()
		{
			IdUser = idUser,
			IdNotificationCategory = idNotificationCategory,
			Title = title,
			Message = message,
			TimeToLife = timeToLife,
			NotificationTransport = notificationTransport,
			NotificationState = NotificationState.Registered
		};

		await notificationRepository.InsertAsync(notification,
			cancellationToken);

		var notificationSender = notificationSenderManager.GetOrDefault(notificationTransport);
		
		if(notificationSender is null) 
			throw new ArgumentInvalidException("Метод отправки уведомления не найден", nameof(notificationTransport));

		await notificationSender.SendAsync(notification, cancellationToken);
	}
	
	public async Task UpdateNotificationAsync(int idNotification,
		bool isRead, 
		CancellationToken cancellationToken)
	{
		var notification = await notificationRepository.GetOrDefaultAsync(idNotification,
			cancellationToken) ?? throw new ArgumentInvalidException("Уведомление не найдено", 
			nameof(idNotification));

		notification.NotificationState = isRead ? NotificationState.Read : NotificationState.Sent;

		await notificationRepository.UpdateAsync(notification, 
			cancellationToken);
	}

	public async Task ResendNotificationAsync(int idUser, 
		NotificationTransport notificationTransport,
		CancellationToken cancellationToken)
	{
		var notifications = await notificationRepository.GetUnsentNotificationsAsync(idUser,
			notificationTransport,
			cancellationToken);
		
		var notificationSender = notificationSenderManager.GetOrDefault(notificationTransport);
		
		if(notificationSender is null) 
			throw new ArgumentInvalidException("Отправитель уведомления не найден", nameof(notificationTransport));

		await notificationSender.SendRangeAsync(notifications, cancellationToken);
	}
}