using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using gehGassiApp.Core.Interfaces;
using gehGassiApp.Core.Mapper;
using gehGassiApp.Domain.Common;
using gehGassiApp.Domain.Pushnotifications;
using Platform = gehGassiApp.Domain.Common.Platform;

namespace gehGassiApp.Core.Services
{
	/// <summary>
	/// Service der alle Funktionen rund um Pushnotifications bereitstellt
	/// </summary>
	public class PushnotificationService : IPushnotificationService
	{
		private readonly ICommunicationService _communicationService;

		/// <summary>
		/// Erstellt eine Instanz
		/// </summary>
		/// <param name="communicationService">Instanz eines ICommunicationService</param>
		public PushnotificationService(ICommunicationService communicationService)
		{
			_communicationService = communicationService;
		}

		/// <summary>
		/// Registrieren / Aktualisieren eines Devices für Push-Notifications
		/// </summary>
		/// <param name="installationId">Eindeutige ID</param>
		/// <param name="channel">Push-Channel / Hub</param>
		/// <param name="language">Sprache des Gerätes</param>
		/// <param name="accessToken">Aktuelles Accesstoken</param>
		/// <param name="token">CancellationToken</param>
		/// <returns>True wenn Registrierung erfolgreich, false sonst</returns>
		public async Task<bool> RegisterAsycn(string installationId, string channel, string language, string accessToken, CancellationToken token)
		{
			var isConnected = await _communicationService.IsConnected();
			if (isConnected)
			{
				var deviceInstallation = new DeviceInstallation
				{
					InstallationId = installationId,
					Channel = channel,
					Platform = Platform.Android,
					NotificationPlatform = NotificationPlatform.FcmV1,
					Language = language
				};

				if (DeviceInfo.Platform == DevicePlatform.iOS)
				{
					deviceInstallation.Platform = Platform.Ios;
					deviceInstallation.NotificationPlatform = NotificationPlatform.Apns;
				}

				var dto = deviceInstallation.ToDto();

				var successResult = await _communicationService.RegisterPushnotificationsAsync(dto, accessToken, token);
				return successResult.Value;
			}

			return false;
		}

		/// <summary>
		/// Deregistrieren eines Devices für Push-Notifications
		/// </summary>
		/// <param name="installationId">Eindeutige ID</param>
		/// <param name="accessToken">Aktuelles Accesstoken</param>
		/// <param name="token">CancellationToken</param>
		/// <returns>True wenn Deregistrierung erfolgreich, false sonst</returns>
		public async Task<bool> UnregisterAsycn(string installationId, string accessToken, CancellationToken token)
		{
			var isConnected = await _communicationService.IsConnected();
			if (isConnected)
			{
				var successResult = await _communicationService.UnregisterPushnotificationsAsync(installationId, accessToken, token);
				return successResult.Value;
			}

			return false;
		}
	}
}