using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using AsbCloudApp.Data.SAUB;
using AsbCloudDb.Model;
using AsbCloudInfrastructure.Background;
using AsbCloudInfrastructure.Services.SAUB;
using Bogus;
using Microsoft.Extensions.DependencyInjection;
using NSubstitute;
using Xunit;

namespace AsbCloudWebApi.Tests.ServicesTests.SAUB;

public class TelemetryDataSaubCacheTests
{
	private readonly IEnumerable<TelemetryDataSaubDto> fakeTelemetries = new Faker<TelemetryDataSaubDto>()
		.RuleFor(t => t.DateTime, DateTime.UtcNow)
		.Generate(5)
		.OrderBy(t => t.DateTime);
	
	private readonly IServiceProvider serviceProvider = Substitute.For<IServiceProvider>();

	private readonly TelemetryDataCache<TelemetryDataSaubDto> telemetryDataCache;

	public TelemetryDataSaubCacheTests()
	{
		serviceProvider.GetService<BackgroundWorker>().Returns(new BackgroundWorker(serviceProvider));
		
		telemetryDataCache = TelemetryDataCache<TelemetryDataSaubDto>.GetInstance<TelemetryDataSaub>(serviceProvider);
	}

	[Fact]
	public void AddRange_ShouldReturn_OneAddedElementToCache()
	{ 
		//arrange
		const int expectedCacheItemCount = 1;

		var idTelemetry = new Random().Next(1, 100);
		var telemetryDataCacheType = telemetryDataCache.GetType();
		
		telemetryDataCacheType.GetField("isLoading", BindingFlags.NonPublic | BindingFlags.Instance)?.SetValue(telemetryDataCache, false);

		//act
		telemetryDataCache.AddRange(idTelemetry, fakeTelemetries);

		//assert
		Assert.True(telemetryDataCache.CacheItemCount == expectedCacheItemCount);
	}

	[Fact]
	public void AddRange_ShouldReturn_ZeroAddedElementToCache()
	{
		//arrange
		const int expectedCacheItemCount = 0;

		var idTelemetry = new Random().Next(1, 100);
		var telemetryDataCacheType = telemetryDataCache.GetType();

		telemetryDataCacheType.GetField("isLoading", BindingFlags.NonPublic | BindingFlags.Instance)?.SetValue(telemetryDataCache, true);

		//act
		telemetryDataCache.AddRange(idTelemetry, fakeTelemetries);

		//assert
		Assert.True(telemetryDataCache.CacheItemCount == expectedCacheItemCount);
	}
}