using Moq;
using NUnit.Framework;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using LCU.Api.Internal.DataCleanUp.Configuration;
using LCU.Api.Internal.DataCleanUp.Models;
using LCU.Api.Internal.DataCleanUp.Services;
using LCU.Api.Internal.DataCleanUp.Services.Emailers;
using LCU.Library.Internal.CoreApiWrapperModel.CoreModels.Accounts;
using LCU.Library.Internal.DataCleanUpModel.Models;

namespace LCU.Api.Internal.DataCleanUpTest.Services;

public class UpdateFannieMaeMortgageServiceTest
{
    private UpdateFannieMaeMortgageService _updateFannieMaeMortgageService;
    private Mock<ICoreApiWrapperService> _mockCoreApiWrapperService;
    private Mock<IFileOperationsService> _mockFileOperationsService;
    private FannieMaeConfiguration _fannieMaeConfiguration;
    private DataCleanUpConfiguration _dataCleanUpConfiguration;
    private Mock<INotificationsApiService> _mockEmailService;

    [SetUp]
    public void Setup()
    {
        _dataCleanUpConfiguration = new DataCleanUpConfiguration()
        {
            TimeZone = "America/Chicago"
        };

        _fannieMaeConfiguration = new FannieMaeConfiguration()
        {
            ErrorFileDefaultName = "FannieMaeErrorRecord",
            SummaryEmailSubject = "FannieMaeSummaryEmail",
            PoolDateUserFieldId = "PLDT",
            PoolNbrUserFieldId = "PLNB",
            FileDateFormat = "M/d/yyyy",
            DnaDateFormat =  "yyyy-MM-dd"
        };

        _mockCoreApiWrapperService = new Mock<ICoreApiWrapperService>();
        _mockFileOperationsService = new Mock<IFileOperationsService>();
        _mockEmailService = new Mock<INotificationsApiService>();
        _updateFannieMaeMortgageService = new UpdateFannieMaeMortgageService(_mockCoreApiWrapperService.Object,
                                                                    _mockFileOperationsService.Object,
                                                                    _fannieMaeConfiguration,
                                                                    _dataCleanUpConfiguration,
                                                                    _mockEmailService.Object);
    }

    [Test]
    public async Task ProcessFannieMaeRecordPoolDate_Ok()
    {
        var request = new FannieMaeMortgageRequest()
        {
            Filename = "TestFile"
        };

        var updateResult = new FannieMaeUpdateResult(request.Filename);
        var fannieMaeList = new List<FannieMaeMortgage>();
        var fannieMaeMortgage1 = new FannieMaeMortgage()
        {
            FannieMaeLoanNumber = 1,
            ServicerLoanNumber = 99998888888800000,
            PoolIssueDate = "6/1/2023"
        };

        fannieMaeList.Add(fannieMaeMortgage1);
        updateResult.UpdateList = fannieMaeList;

        var accountUserValuesList = new List<AccountUserField>() 
        {
            new AccountUserField()
            {
                AccountNumber = 99998888888800000,
                Value = "6/1/2023",
                UserFieldCode = _fannieMaeConfiguration.PoolDateUserFieldId
            }
        };

        _mockCoreApiWrapperService.Setup(x => x.AddAccountUserField(It.IsAny<long>(), It.IsAny<string>(), It.IsAny<string>()))
                                  .ReturnsAsync(accountUserValuesList).Verifiable();

        var result = await _updateFannieMaeMortgageService.ProcessFannieMaeRecord(fannieMaeMortgage1, updateResult, _fannieMaeConfiguration.PoolDateUserFieldId, fannieMaeMortgage1.PoolIssueDate);

        Assert.AreEqual(0, result.ErrorList.Count());
        Assert.AreEqual(2, result.UpdateList.Count());
        Assert.AreEqual(fannieMaeMortgage1.ServicerLoanNumber, accountUserValuesList[0].AccountNumber);
    }

    [Test]
    public void ProcessFannieMaeRecordForPoolDate_Error()
    {
        var request = new FannieMaeMortgageRequest()
        {
            Filename = "TestFile"
        };

        var updateResult = new FannieMaeUpdateResult(request.Filename);

        var fannieMaeList = new List<FannieMaeMortgage>();
        var fannieMaeMortgage1 = new FannieMaeMortgage()
        {
            FannieMaeLoanNumber = 1,
            ServicerLoanNumber = 99998877778800000,
            PoolIssueDate = "6/1/2023"
        };

        fannieMaeList.Add(fannieMaeMortgage1);
        updateResult.UpdateList = fannieMaeList;
   
        var result = _updateFannieMaeMortgageService.ProcessFannieMaeRecord(fannieMaeMortgage1, updateResult, _fannieMaeConfiguration.PoolDateUserFieldId, fannieMaeMortgage1.PoolIssueDate);

        Assert.AreEqual(1, result.Result.ErrorList.Count());
        Assert.AreEqual("Fannie Mae Loan Record Failed: 99998877778800000", result.Result.ErrorList[0]);
    }

    [Test]
    public async Task ProcessFannieMaeRecordPoolNumber_Ok()
    {
        var request = new FannieMaeMortgageRequest()
        {
            Filename = "TestFile"
        };

        var updateResult = new FannieMaeUpdateResult(request.Filename);
        var fannieMaeList = new List<FannieMaeMortgage>();
        var fannieMaeMortgage1 = new FannieMaeMortgage()
        {
            FannieMaeLoanNumber = 1,
            ServicerLoanNumber = 99998888888800000,
            PoolNumber = "TEST1234"
        };

        fannieMaeList.Add(fannieMaeMortgage1);
        updateResult.UpdateList = fannieMaeList;

        var accountUserValuesList = new List<AccountUserField>()
        {
            new AccountUserField()
            {
                AccountNumber = 99998888888800000,
                Value = "TEST1234",
                UserFieldCode = _fannieMaeConfiguration.PoolNbrUserFieldId
            }
        };

        _mockCoreApiWrapperService.Setup(x => x.AddAccountUserField(It.IsAny<long>(), It.IsAny<string>(), It.IsAny<string>()))
                                  .ReturnsAsync(accountUserValuesList).Verifiable();

        var result = await _updateFannieMaeMortgageService.ProcessFannieMaeRecord(fannieMaeMortgage1, updateResult, _fannieMaeConfiguration.PoolNbrUserFieldId, fannieMaeMortgage1.PoolNumber);

        Assert.AreEqual(0, result.ErrorList.Count());
        Assert.AreEqual(2, result.UpdateList.Count());
        Assert.AreEqual(fannieMaeMortgage1.ServicerLoanNumber, accountUserValuesList[0].AccountNumber);
    }

    [Test]
    public void ProcessFannieMaeRecordForPoolNumber_Error()
    {
        var request = new FannieMaeMortgageRequest()
        {
            Filename = "TestFile"
        };

        var updateResult = new FannieMaeUpdateResult(request.Filename);

        var fannieMaeList = new List<FannieMaeMortgage>();
        var fannieMaeMortgage1 = new FannieMaeMortgage()
        {
            FannieMaeLoanNumber = 1288,
            ServicerLoanNumber = 99998566800000,
            PoolNumber = "TEST1234"
        };

        fannieMaeList.Add(fannieMaeMortgage1);
        updateResult.UpdateList = fannieMaeList;

        var result = _updateFannieMaeMortgageService.ProcessFannieMaeRecord(fannieMaeMortgage1, updateResult, _fannieMaeConfiguration.PoolNbrUserFieldId, fannieMaeMortgage1.PoolNumber);

        Assert.AreEqual(1, result.Result.ErrorList.Count());
        Assert.AreEqual("Fannie Mae Loan Record Failed: 99998566800000", result.Result.ErrorList[0]);
    }

    [Test]
    public void BuildTotalBatchSummary_Ok_UpdatesErrors()
    {
        var request = new FannieMaeMortgageRequest()
        {
            Filename = "TestFile"
        };

        var updateResults = new List<FannieMaeUpdateResult>();
        var resultOne = new FannieMaeUpdateResult(request.Filename);
        var errorListOne = new List<string>()
        {
            "errorOne",
            "errorTwo",
            "errorThree"
        };

        var fannieMaeList = new List<FannieMaeMortgage>();
        var fannieMaeMortgage1 = new FannieMaeMortgage()
        {
            FannieMaeLoanNumber = 1,
            PoolIssueDate = "6/1/2023",
            PoolNumber = "XXXZ23443"
        };
        var fannieMaeMortgage2 = new FannieMaeMortgage()
        {
            FannieMaeLoanNumber = 2,
            PoolIssueDate = "6/1/2023",
            PoolNumber = "DDDZ23443"
        };

        fannieMaeList.Add(fannieMaeMortgage1);
        fannieMaeList.Add(fannieMaeMortgage2);

        resultOne.ErrorList = errorListOne;
        resultOne.UpdateList = fannieMaeList;
        resultOne.TotalRecordsFound = 5;

        updateResults.Add(resultOne);

        var result = _updateFannieMaeMortgageService.BuildTotalBatchSummary(updateResults, true);

        Assert.AreEqual(5, result.TotalRecordsFound);
        Assert.AreEqual(3, result.TotalErrorRecords);
        Assert.AreEqual(true, result.ErrorFileCreated);
        Assert.AreEqual(2, result.TotalRecordsUpdated);
    }

    [Test]
    public void BuildTotalBatchSummary_Ok_UpdatesNoErrors()
    {
        var request = new FannieMaeMortgageRequest()
        {
            Filename = "TestFile"
        };

        var updateResults = new List<FannieMaeUpdateResult>();
        var resultOne = new FannieMaeUpdateResult(request.Filename);
        var errorListOne = new List<string>()
        {
           
        };

        var fannieMaeList = new List<FannieMaeMortgage>();
        var fannieMaeMortgage1 = new FannieMaeMortgage()
        {
            FannieMaeLoanNumber = 1,
            PoolIssueDate = "6/1/2023",
            PoolNumber = "XXXZ23443"
        };
        var fannieMaeMortgage2 = new FannieMaeMortgage()
        {
            FannieMaeLoanNumber = 2,
            PoolIssueDate = "6/1/2023",
            PoolNumber = "DDDZ23443"
        };

        fannieMaeList.Add(fannieMaeMortgage1);
        fannieMaeList.Add(fannieMaeMortgage2);

        resultOne.ErrorList = errorListOne;
        resultOne.UpdateList = fannieMaeList;
        resultOne.TotalRecordsFound = 2;

        updateResults.Add(resultOne);

        var result = _updateFannieMaeMortgageService.BuildTotalBatchSummary(updateResults, false);

        Assert.AreEqual(2, result.TotalRecordsFound);
        Assert.AreEqual(0, result.TotalErrorRecords);
        Assert.AreEqual(false, result.ErrorFileCreated);
        Assert.AreEqual(2, result.TotalRecordsUpdated);
    }

    [Test]
    public void BuildTotalBatchSummary_Ok_NoUpdatesNoErrors()
    {
        var request = new FannieMaeMortgageRequest()
        {
            Filename = "TestFile"
        };

        var updateResults = new List<FannieMaeUpdateResult>();
        var resultOne = new FannieMaeUpdateResult(request.Filename);
        var errorListOne = new List<string>()
        {

        };

        var fannieMaeList = new List<FannieMaeMortgage>();

        resultOne.ErrorList = errorListOne;
        resultOne.UpdateList = fannieMaeList;
        resultOne.TotalRecordsFound = 0;

        updateResults.Add(resultOne);

        var result = _updateFannieMaeMortgageService.BuildTotalBatchSummary(updateResults, false);

        Assert.AreEqual(0, result.TotalRecordsFound);
        Assert.AreEqual(0, result.TotalErrorRecords);
        Assert.AreEqual(false, result.ErrorFileCreated);
        Assert.AreEqual(0, result.TotalRecordsUpdated);
    }

    [Test]
    public void AddStringToErrorList_Ok()
    {
        var request = new FannieMaeMortgageRequest()
        {
            Filename = "TestFile"
        };

        var updateResult = new FannieMaeUpdateResult(request.Filename);
        updateResult.ErrorList = new List<string>();

        var fannieMaeRecord = new FannieMaeMortgage()
        {
           ServicerLoanNumber = 1,
           PoolIssueDate = "6/1/2023",
           PoolNumber = "TEST1234"
        };

        var expectedError = "1|TEST1234|6/1/2023|Unit test error message\n";
        updateResult.AddStringToErrorList(fannieMaeRecord, "Unit test error message");

        Assert.AreEqual(1, updateResult.ErrorList.Count);
        Assert.AreEqual(expectedError, updateResult.ErrorList.FirstOrDefault());
    }
}