using System;
using System.Threading.Tasks;
using System.Linq;
using Moq;
using NUnit.Framework;
using LCU.API.Internal.DocumentIngestor.Services;
using LCU.Library.Internal.DocumentIngestorModels.Entities;
using LCU.Library.Internal.DocumentIngestorModels.Enums;
using LCU.API.Internal.DocumentIngestor.Configurations;
using LCU.API.Internal.DocumentIngestor.Services.IngestionOperationServices;
using LCU.API.Internal.DocumentIngestor.Services.MicroApiServices;
using LCU.Library.DocumentType.Models.Responses.External;
using LCU.Library.Internal.ApiResponse.Models;
using LCU.Library.Internal.Exceptions;
using Serilog;
using System.Collections.Generic;

namespace LCU.API.Internal.DocumentIngestorTests.Services;

public class UploadCompletionReprocessingServiceTest
{
	private UploadCompletionReprocessingService _uploadCompletionReprocessingService;
	private Mock<IIngestorRunInfoService> _mockIngestorRunInfoService;
	private Mock<IDocumentProcessingInfoService> _mockDocumentProcessingInfoService;
	private Mock<IUploadCompletionService> _mockUploadCompletionService;
	private Mock<IDocumentTypeRetrieverService> _mockDocumentTypeRetrieverService;
	private ApiConfiguration _apiConfiguration;
	private readonly Mock<ILogger> _logger = new();
	private readonly ILogger _originalLogger = Log.Logger;

	[SetUp]
	public void Setup()
	{
		Log.Logger = _logger.Object;

		_mockIngestorRunInfoService = new Mock<IIngestorRunInfoService>();
		_mockDocumentProcessingInfoService = new Mock<IDocumentProcessingInfoService>();
		_mockDocumentTypeRetrieverService = new Mock<IDocumentTypeRetrieverService>();
		_mockUploadCompletionService = new Mock<IUploadCompletionService>();
		_apiConfiguration = new ApiConfiguration();
		_uploadCompletionReprocessingService = new UploadCompletionReprocessingService(_mockIngestorRunInfoService.Object,
																					   _mockDocumentProcessingInfoService.Object,
																					   _mockDocumentTypeRetrieverService.Object,
																					   _mockUploadCompletionService.Object,
																					   _apiConfiguration);
	}

	[TearDown]
	public void TearDown()
	{
		Log.Logger = _originalLogger;
	}

	[Test]
	public async Task QueueReprocessUploadCompletionByDocumentProcessingInfoId_Success()
	{

		var documentProcessingInfoId = DateTime.Now.Millisecond;
		var userName = Guid.NewGuid().ToString();
		var documentProcessingInfo = SetupGetDocumentProcessingInfo(documentProcessingInfoId);
		var ingestorRunInfo = SetupGetIngestorRunInfo(documentProcessingInfo.IngestorRunInfoId);
		SetupDocumentInformation(documentProcessingInfo.DocumentId);

		_mockDocumentProcessingInfoService.Setup(x => x.UpdateStatusAndAddLog(documentProcessingInfoId,
																			  documentProcessingInfo.StatusType,
																			  It.IsAny<string>(),
																			  userName,
																			  It.IsAny<bool?>())).ReturnsAsync(documentProcessingInfo);

		await _uploadCompletionReprocessingService.QueueReprocessUploadCompletionByDocumentProcessingInfoId(documentProcessingInfoId, userName);

		_mockDocumentProcessingInfoService.Verify(x => x.GetByIdAsync(documentProcessingInfoId), Times.Once);
		_mockIngestorRunInfoService.Verify(x => x.GetByIdAsync(ingestorRunInfo.IngestorRunInfoId), Times.Once);
		_mockDocumentTypeRetrieverService.Verify(x => x.GetDocumentInformationById(documentProcessingInfo.DocumentId ?? Guid.Empty), Times.Once);
		_mockDocumentProcessingInfoService.Verify(x => x.UpdateStatusAndAddLog(documentProcessingInfoId,
																				It.IsAny<ProcessStatusTypes>(),
																				It.IsAny<string>(),
																				userName,
																				It.IsAny<bool?>()), Times.Once);
		_mockUploadCompletionService.Verify(x => x.HandleUploadCompletion(It.IsAny<List<Response>>()), Times.Once);
	}

	[Test]
	public void QueueReprocessUploadCompletionByDocumentProcessingInfoId_Failure_Exception()
	{
		var id = DateTime.Now.Millisecond;
		var userName = Guid.NewGuid().ToString();
		_mockDocumentProcessingInfoService.Setup(x => x.GetByIdAsync(id)).ThrowsAsync(new Exception("Test Error"));
		Assert.ThrowsAsync<ServiceException>(async () => await _uploadCompletionReprocessingService
																		.QueueReprocessUploadCompletionByDocumentProcessingInfoId(id, userName));
		_mockDocumentProcessingInfoService.Verify(x => x.GetByIdAsync(It.IsAny<int>()), Times.Once);
		_mockIngestorRunInfoService.Verify(x => x.GetByIdAsync(It.IsAny<Guid>()), Times.Never);
		_mockDocumentTypeRetrieverService.Verify(x => x.GetDocumentInformationById(It.IsAny<Guid>()), Times.Never);
		_mockDocumentProcessingInfoService.Verify(x => x.UpdateStatusAndAddLog(It.IsAny<int>(),
																			   It.IsAny<ProcessStatusTypes>(),
																			   It.IsAny<string>(),
																			   It.IsAny<string>(),
																			   It.IsAny<bool?>()), Times.Never);
		_mockUploadCompletionService.Verify(x => x.HandleUploadCompletion(It.IsAny<List<Response>>()), Times.Never);
	}

	[Test]
	public void QueueReprocessUploadCompletionByDocumentProcessingInfoId_Failure_ArgumentNullException()
	{
		var id = DateTime.Now.Millisecond;
		var userName = Guid.NewGuid().ToString();
		_mockDocumentProcessingInfoService.Setup(x => x.GetByIdAsync(id)).ThrowsAsync(new ArgumentNullException("Test Error"));
		Assert.ThrowsAsync<ArgumentNullException>(async () => await _uploadCompletionReprocessingService
																		.QueueReprocessUploadCompletionByDocumentProcessingInfoId(id, userName));

		_mockDocumentProcessingInfoService.Verify(x => x.GetByIdAsync(id), Times.Once);
		_mockIngestorRunInfoService.Verify(x => x.GetByIdAsync(It.IsAny<Guid>()), Times.Never);
		_mockDocumentProcessingInfoService.Verify(x => x.UpdateStatusAndAddLog(It.IsAny<int>(),
																			   It.IsAny<ProcessStatusTypes>(),
																			   It.IsAny<string>(),
																			   It.IsAny<string>(),
																			   It.IsAny<bool?>()), Times.Never);
		_mockUploadCompletionService.Verify(x => x.HandleUploadCompletion(It.IsAny<List<Response>>()), Times.Never);
	}

	[Test]
	public void QueueReprocessAllNotificationDataFailures_InfoServiceThrowsArgumentNull_ThrowsServiceException()
	{
        var processStatus = ProcessStatusTypes.NotificationDataFailure;
        _mockDocumentProcessingInfoService
			.Setup(s => s.GetByProcessStatusTypeAsync(processStatus, null))
			.ThrowsAsync(new ArgumentNullException());

		Assert.ThrowsAsync<ServiceException>(() => _uploadCompletionReprocessingService.QueueReprocessAllNotificationDataFailures(Guid.NewGuid().ToString()));
	}

	[Test]
	public async Task QueueReprocessAllNotificationDataFailures_InfoServiceThrows_ThrowsServiceException()
	{
        var processStatus = ProcessStatusTypes.NotificationDataFailure;
        _mockDocumentProcessingInfoService
			.Setup(s => s.GetByProcessStatusTypeAsync(processStatus, null))
			.ThrowsAsync(new Exception());

		Assert.ThrowsAsync<ServiceException>(() => _uploadCompletionReprocessingService.QueueReprocessAllNotificationDataFailures(Guid.NewGuid().ToString()));
	}

	[Test]
	public async Task QueueReprocessAllNotificationDataFailures_InfoServiceReturnsMoreThanLimit_RequeuesUpToLimit()
	{
		var id = DateTime.Now.Millisecond;
		var username = Guid.NewGuid().ToString();
		var notificationDataFailures = Enumerable
			.Repeat(() => SetupGetDocumentProcessingInfo(id), 16)
			.Select(f => f())
			.ToArray();
		foreach (var info in notificationDataFailures)
		{
			SetupGetIngestorRunInfo(info.IngestorRunInfoId);
			SetupDocumentInformation(info.DocumentId);
		}

        var processStatus = ProcessStatusTypes.NotificationDataFailure;

        _apiConfiguration.NotificationDataFailureReprocessLimit = notificationDataFailures.Length / 2;
		_mockDocumentProcessingInfoService
			.Setup(s => s.GetByProcessStatusTypeAsync(processStatus, null))
			.ReturnsAsync(notificationDataFailures);

		await _uploadCompletionReprocessingService.QueueReprocessAllNotificationDataFailures(username);

		_mockDocumentProcessingInfoService
			.Verify
			(
				s => s.UpdateStatusAndAddLog
				(
					It.Is<int>(id => notificationDataFailures.Any(f => f.DocumentProcessingInfoId == id)),
					ProcessStatusTypes.UploadCompletionReprocessing,
					It.IsAny<string>(),
					username,
					It.IsAny<bool?>()
				),
				Times.Exactly(_apiConfiguration.NotificationDataFailureReprocessLimit)
			);
		_mockUploadCompletionService
			.Verify
			(
				dp => dp.HandleUploadCompletion
				(
                    It.IsAny<List<Response>>()
                ),
				Times.Exactly(_apiConfiguration.NotificationDataFailureReprocessLimit)
			);
	}

	private DocumentProcessingInfo SetupGetDocumentProcessingInfo(int id)
	{
		var info = new DocumentProcessingInfo
		{
			IngestorRunInfoId = Guid.NewGuid(),
			CreatedDate = DateTime.Now,
			DocumentValuePayload = Guid.NewGuid().ToString(),
			StatusType = Random<ProcessStatusTypes>(),
			DocumentFileName = Guid.NewGuid().ToString(),
			ProcessCount = DateTime.Now.Millisecond,
			DocumentType = "EAgreement",
			DocumentBusinessName = Guid.NewGuid().ToString(),
			DocumentProcessingInfoId = id,
			DocumentId = Guid.NewGuid()
		};

		_mockDocumentProcessingInfoService
			.Setup(s => s.GetByIdAsync(id))
			.ReturnsAsync(info);

		return info;
	}

	private IngestorRunInfo SetupGetIngestorRunInfo(Guid ingestorRunInfoId)
	{
		var info = new IngestorRunInfo
		{
			IngestorRunInfoId = ingestorRunInfoId,
			StartTimeStamp = DateTime.Now,
			IngestorType = Random<IngestorTypes>(),
			IndexFileName = Guid.NewGuid().ToString(),
			IndexFilePath = Guid.NewGuid().ToString(),
			IndexTotal = DateTime.Now.Millisecond
		};

		_mockIngestorRunInfoService
			.Setup(s => s.GetByIdAsync(ingestorRunInfoId))
			.ReturnsAsync(info);

		return info;
	}

	private EnrichedDocumentMetadataResponse SetupDocumentInformation(Guid? documentId)
	{
		var info = new EnrichedDocumentMetadataResponse()
		{
			DocumentId = documentId ?? Guid.Empty,
			Type = "LnNent",
			PersonNumbers = new[] { "123" },
			AccountNumber = 345
		};

		_mockDocumentTypeRetrieverService
			.Setup(s => s.GetDocumentInformationById(documentId ?? Guid.Empty))
			.ReturnsAsync(info);

		return info;
	}

	private static T Random<T>() where T : struct, Enum => Enum.GetValues<T>()[DateTime.Now.Millisecond % (Enum.GetValues<T>().Length - 1)];
}