using FluentAssertions;
using FluentValidation;
using Microsoft.EntityFrameworkCore;
using Moq;
using ReserveManagementSystemApi.Models;
using ReserveManagementSystemApi.ServiceClients;
using ReserveManagementSystemApi.Services;
using ReserveManagementSystemLib.Models;
using ReserveManagementSystemLib.Persistence;
using ReserveManagementSystemLib.Repositories;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using TechTalk.SpecFlow;
using TechTalk.SpecFlow.Assist;
using TechTalk.SpecFlow.Assist.ValueRetrievers;
using Xunit;

namespace ReserveManagementSystemApi.Tests.ServiceTests
{
    [Binding]
    public sealed class LoanServiceSteps
    {
        // For additional details on SpecFlow step definitions see https://go.specflow.org/doc-stepdef

        private readonly ScenarioContext _scenarioContext;
        private LoanService _loanService;
        private AppDbContext _appDbContext;
        private IEnumerable<Loan> _loansResult;
        private List<Loan> _loansToSave;
        private Loan _loanResult;
        private Exception _exception;
        private LoanFilter _loanFilter;
        private List<string> _memberResult;
        private List<string> _loanNumberResult;
        private List<string> _applicationIdResult;
        PaginatedListResponse _pagedListResponse = new PaginatedListResponse();
        private IEnumerable<Loan> _closedLoans;
        private IEnumerable<Loan> _loansInSystem;
        private IEnumerable<Loan> _loansNotInSystem;
        private Mock<ILoanRepository> _mockLoanRepo = new Mock<ILoanRepository>();
        private Mock<IAuditHistoryRepository> _mockAuditHistRepo = new Mock<IAuditHistoryRepository>();

        public LoanServiceSteps(ScenarioContext scenarioContext)
        {
            _scenarioContext = scenarioContext;
        }

        [BeforeScenario]
        public void CreateDatabase()
        {
            var options = new DbContextOptionsBuilder<AppDbContext>()
                .UseInMemoryDatabase(Guid.NewGuid().ToString())
                .Options;
            _appDbContext = new AppDbContext(options);
            _loanService = new LoanService(new LoanRepository(_appDbContext), new LoanTypeRepository(_appDbContext), new AuditHistoryService(_mockAuditHistRepo.Object), new Mock<ICoreApiServiceClient>().Object);
        }

        [AfterScenario]
        public void Dispose()
        {
            _appDbContext.Database.EnsureDeleted();
            _appDbContext.Dispose();
        }

        [Given(@"the Loan table has the following loans")]
        public void GivenTheLoanTableHasTheFollowingLoans(Table table)
        {
            var loans = table.CreateSet<Loan>();

            _appDbContext.Loans.AddRange(loans);
            _appDbContext.SaveChanges();
        }

        [Given(@"I have these loans to save")]
        public void GivenIHaveThisLoanToSave(Table table)
        {
            _loansToSave = table.CreateSet<Loan>().ToList();
        }

        [Given(@"a loan filter that looks like")]
        public void GivenALoanFilterThatLooksLike(Table table)
        {
            _loanFilter = table.CreateInstance<LoanFilter>();
        }

        [Then(@"the first loan from the loan service has ImportId (.*)")]
        public void ThenTheFirstLoanFromTheLoanServiceHasImportId(int importId)
        {
            Assert.Equal(importId, _loansResult.First().ImportId);
        }

        [Given(@"the Loan Repository throws an exception in ListAll")]
        public void GivenTheLoanRepositoryThrowsAnExceptionInListAll()
        {
            _mockLoanRepo.Setup(a => a.GetAll()).Throws(new Exception());
            _loanService = new LoanService(_mockLoanRepo.Object, new LoanTypeRepository(_appDbContext), new AuditHistoryService(_mockAuditHistRepo.Object), new Mock<ICoreApiServiceClient>().Object);
        }

        [Given(@"the Loan Repository throws an exception in FindByIdAsync")]
        public void GivenTheLoanRepositoryThrowsAnExceptionInFindByIdAsync()
        {
            _mockLoanRepo.Setup(a => a.FindByIdAsync(It.IsAny<int>())).Throws(new Exception());
            _loanService = new LoanService(_mockLoanRepo.Object, new LoanTypeRepository(_appDbContext), new AuditHistoryService(_mockAuditHistRepo.Object), new Mock<ICoreApiServiceClient>().Object);
        }

        [Given(@"the Loan Repository throws an exception in UpdateAsync")]
        public void GivenTheLoanRepositoryThrowsAnExceptionInAdd()
        {
            _mockLoanRepo.Setup(a => a.UpdateAsync(It.IsAny<List<Loan>>())).Throws(new Exception());
            _loanService = new LoanService(_mockLoanRepo.Object, new LoanTypeRepository(_appDbContext), new AuditHistoryService(_mockAuditHistRepo.Object), new Mock<ICoreApiServiceClient>().Object);
        }

        [Given(@"loan types that look like")]
        public void GivenLoanTypesThatLookLike(Table table)
        {
            var loanTypes = table.CreateSet<LoanType>().ToList();
            _appDbContext.LoanTypes.AddRange(loanTypes);
            _appDbContext.SaveChanges();
        }

        [Given(@"I have these loans to save with chargebacks")]
        public void GivenIHaveTheseLoansToSaveWithChargebacks(Table table)
        {
            _closedLoans = table.CreateSet<Loan>().ToList();
        }

        [Given(@"the dealer table has these dealers")]
        public void GivenTheDealerTableHasTheseDealers(Table table)
        {
            var dealers = table.CreateSet<Dealer>().ToList();
            _appDbContext.Dealers.AddRange(dealers);
            _appDbContext.SaveChanges();
        }

        [When(@"I save the loans with chargebacks")]
        public async void WhenISaveTheLoansWithChargebacks()
        {
            try
            {
                var result = await _loanService.SaveWithChargebackAsync(_closedLoans.ToList());
            }
            catch (Exception ex)
            {
                _exception = ex;
            }
        }

        [When(@"I get the list of all loans with the loan service")]
        public async void WhenIGetTheListOfAllLoansWithTheLoanService()
        {
            try
            {
                _loansResult = await _loanService.GetAllAsync();
            }
            catch (Exception ex)
            {
                _exception = ex;
            }
        }

        [When(@"I get the list of all loans with the loan service with the mock loan repo")]
        public async void WhenIGetTheListOfAllLoansWithTheLoanServiceWithTheMockLoanRepo()
        {
            try
            {
                _loansResult = await _loanService.GetAllAsync();
            }
            catch (Exception ex)
            {
                _exception = ex;
            }
        }


        [When(@"I get the list of the filtered loans with the loan service")]
        public async void WhenIGetTheListOfTheFilteredLoansWithTheLoanService()
        {
            try
            {
                _pagedListResponse = await _loanService.GetFilteredAsync(_loanFilter);
                _loansResult = _pagedListResponse.LoanList;
             }
            catch (Exception ex)
            {
                _exception = ex;
            }
        }

        [When(@"I get the list of paged loans")]
        public async void WhenIGetTheListOfPagedLoans()
        {
            try
            {
                _pagedListResponse = await _loanService.GetFilteredAsync(_loanFilter);
                _loansResult = _pagedListResponse.LoanList;
            }
            catch (Exception ex)
            {
                _exception = ex;
            }
        }

        [Then(@"the result from the loan service should have (.*) pages")]
        public void ThenTheResultFromTheLoanServiceShouldHavePages(int pageCount)
        {
            Assert.Equal(pageCount, _pagedListResponse.TotalPages);
        }

        [Then(@"the result from the loan service should have (.*) records")]
        public void ThenTheResultFromTheLoanServiceShouldHaveRecords(int recordCount)
        {
            Assert.Equal(recordCount, _pagedListResponse.LoanList.Count());
        }

        [Then(@"the result from the loan service should have (.*) total items")]
        public void ThenTheResultFromTheLoanServiceShouldHaveTotalItems(int recordCount)
        {
            Assert.Equal(recordCount, _pagedListResponse.TotalItems);
        }

        [Then(@"the first result from the loan service should have loanid (.*)")]
        public void ThenTheFirstResultFromTheLoanServiceShouldHaveLoanId(int loanId)
        {
            Assert.Equal(loanId, _pagedListResponse.LoanList.First().LoanId);
        }

        //have to rethink this if we get rid of the other one
        [When(@"I save the loan with the reserve")]
        public async void WhenISaveTheLoan()
        {
            try
            {
                await _loanService.SaveLoansAsync(_loansToSave);
            }
            catch (Exception ex)
            {
                _exception = ex;
            }
        }

        [When(@"I save the loan with the reserve with the mock loan repo")]
        public async void WhenISaveTheLoanWithTheReserveWithTheMockLoanRepo()
        {
            try
            {
                 await _loanService.SaveLoansAsync(_loansToSave);
            }
            catch (Exception ex)
            {
                _exception = ex;
            }
        }

        [Then(@"the result from the loan service has previous page should be (.*)")]
        public void ThenTheResultFromTheLoanServiceHasPreviousPageShouldBe(bool hasPreviousPage)
        {
            Assert.Equal(hasPreviousPage, _pagedListResponse.HasPreviousPage);
        }

        [Then(@"the result from the loan service has next page should be (.*)")]
        public void ThenTheResultFromTheLoanServiceHasNextPageShouldBe(bool hasNextPage)
        {
            Assert.Equal(hasNextPage, _pagedListResponse.HasNextPage);
        }

        [Then (@"the result from the loan service first page should be (.*)")]
        public void ThenTheResultFromTheLoanServiceFirstPageShouldBe(int firstPage)
        {
            Assert.Equal(firstPage, _pagedListResponse.FirstPage);
        }

        [Then(@"the result from the loan service last page should be (.*)")]
        public void ThenTheResultFromTheLoanServiceLastPageShouldBe(int lastPage)
        {
            Assert.Equal(lastPage, _pagedListResponse.LastPage);
        }

        [When(@"I get the loan with the loanId (.*) from the loan service")]
        public async void WhenIGetTheLoanWithTheLoanIdFromTheLoanService(int loanId)
        {
            try
            {
                _loanResult = await _loanService.GetByIdAsync(loanId);
            }
            catch (Exception ex)
            {
                _exception = ex;
            }
        }

        [When(@"I get the loan with the loanId (.*) from the loan service using the Mock Loan Repo")]
        public async void WhenIGetTheLoanWithTheLoanIdFromTheLoanServiceUsingTheMockLoanRepo(int loanId)
        {
            try
            {
                _loanResult = await _loanService.GetByIdAsync(loanId);
            }
            catch (Exception ex)
            {
                _exception = ex;
            }
        }

        [When(@"I get the list of members with search string ""(.*)""")]
        public async void WhenIGetTheListOfMembersWithSearchString(string searchString)
        {
            _memberResult = await _loanService.SearchMembers(searchString);
        }

        [When(@"I get the list of loan numbers with search string ""(.*)""")]
        public async void WhenIGetTheListOfLoanNumbersWithSearchString(string searchString)
        {
            _loanNumberResult = await _loanService.SearchLoanNumbers(searchString);
        }

        [When(@"I get the list of application ids with search string ""(.*)""")]
        public async void WhenIGetTheListOfApplicationIdsWithSearchString(string searchString)
        {
            _applicationIdResult = await _loanService.SearchApplicationIds(searchString);
        }


        [Then(@"the result from the loan service should have (.*) loans")]
        public void ThenTheResultFromTheLoanServiceShouldHaveLoans(int loanCount)
        {
            Assert.Equal(loanCount, _loansResult.Count());
        }

        [Then(@"the list of members returned is in this order")]
        public void ThenTheListOfMembersReturnedIsInThisOrder(Table table)
        {
            var expectedMemberNumbers = table.Rows.Select(x => x[0]).ToList();
            _memberResult.Should().BeEquivalentTo(expectedMemberNumbers).And.ContainInOrder(expectedMemberNumbers);
        }

        [Then(@"the list of loan numbers looks like")]
        public void ThenTheListOfLoanNumbersLooksLike(Table table)
        {
            var expectedLoanNumbers = table.Rows.Select(x => x[0]).ToList();
            _loanNumberResult.Should().BeEquivalentTo(expectedLoanNumbers).And.ContainInOrder(expectedLoanNumbers);
        }

        [Then(@"the list of application ids looks like")]
        public void ThenTheListOfApplicationIdsLooksLike(Table table)
        {
            var expectedApplicationIds = table.Rows.Select(x => x[0]).ToList();
            _applicationIdResult.Should().BeEquivalentTo(expectedApplicationIds).And.ContainInOrder(expectedApplicationIds);
        }


        [Then(@"the loans from the loan service look like")]
        public async void ThenTheLoanFromTheLoanServiceLooksLike(Table table)
        {
            var actualLoans = (await _loanService.GetAllAsync()).ToList();
            table.CompareToSet(actualLoans);
        }

        [Then(@"the first loan from the loan service has LoanId (.*)")]
        public void ThenTheFirstLoanFromTheLoanServiceHasLoanId(int loanId)
        {
            Assert.Equal(loanId, _loansResult.First().LoanId);
        }

        [Then(@"the loan ids from the loan service look like")]
        public void ThenTheLoanIdsFromTheLoanServiceLookLike(Table table)
        {
            var expectedLoanIds = table.CreateSet<int>().ToList();
            _loansResult.Select(x => x.LoanId).Should().BeEquivalentTo(expectedLoanIds).And.ContainInOrder(expectedLoanIds);
        }

        [Then(@"the loan ids from the loan service look like ""(.*)""")]
        public void ThenTheLoanIdsFromTheLoanServiceLookLike(string listOfIds)
        {
            var expected = listOfIds.Split(',').Select(x => int.Parse(x)).ToList();
            _loansResult.Select(x => x.LoanId).Should().BeEquivalentTo(expected);
        }


        [Then(@"the loan with LoanId (.*) has dealer name ""(.*)""")]
        public void ThenTheLoanWithLoanIdHasDealerName(int loanId, string dealerName)
        {
            Assert.Equal(dealerName, _loansResult.First(x => x.LoanId == loanId).Dealer.Name);
        }

        [Then(@"the Loan Service throws an exception with the message ""(.*)""")]
        public void ThenTheLoanServiceThrowsAnExceptionWithTheMessage(string message)
        {
            Assert.NotNull(_exception);
            Assert.Equal(message, _exception.Message);
        }

        [Then(@"the loan from the loan service has LoanId (.*)")]
        public void ThenTheLoanFromTheLoanServiceHasLoanId(int loanId)
        {
            Assert.Equal(loanId, _loanResult.LoanId);
        }

        [Then(@"the loan from the loan service has dealer name ""(.*)""")]
        public void ThenTheLoanFromTheLoanServiceHasDealerName(string dealerName)
        {
            Assert.Equal(dealerName, _loanResult.Dealer.Name);
        }

        [Then(@"the flat fee result for MemberNumber (.*) should be (.*)")]
        public void ThenTheReserveAmountResultShouldBe(string member, bool feePaid)
        {
            Assert.Equal(feePaid, _loansResult.FirstOrDefault(x => x.MemberNumber == member).FlatFeePaid);
        }

        [Then(@"the loan from the loan service has LoanType.LoanComment ""(.*)""")]
        public void ThenTheLoanFromTheLoanServiceHasLoanTypeDescription(string description)
        {
            Assert.Equal(description, _loanResult.LoanType?.LoanComment ?? string.Empty);
        }

        [Then(@"the loans in the system look like")]
        public void ThenTheLoansInTheSystemLookLike(Table table)
        {
            table.CompareToSet(_loansInSystem);
        }

        [Then(@"the loans not in the system look like")]
        public void ThenTheLoansNotInTheSystemLookLike(Table table)
        {
            table.CompareToSet(_loansNotInSystem);
        }

        [Then(@"the loans in the loan table will look like")]
        public void ThenTheLoansInTheLoanTableWillLookLike(Table table)
        {
            table.CompareToSet(_loansResult);
        }
    }
}