using System.Net;
using System.Net.Http.Json;
using CashLineERP.Application.IslamicFinance.ContractTemplates;
using CashLineERP.Application.IslamicFinance.Facilities;
using CashLineERP.Application.IslamicFinance.Murabaha;
using CashLineERP.Application.IslamicFinance.PartnerLenders;
using CashLineERP.Application.IslamicFinance.ProductProfiles;
using CashLineERP.Application.IslamicFinance.Requests;
using CashLineERP.Application.IslamicFinance.Shariah;
using CashLineERP.Contracts.Documents;
using CashLineERP.Contracts.IslamicFinance;
using CashLineERP.Infrastructure.Persistence;
using CashLineERP.Infrastructure.Persistence.Repositories.IslamicFinance;
using Microsoft.Extensions.DependencyInjection;

namespace CashLineERP.Api.Tests;

public sealed class IslamicFinanceMurabahaContractQaTests : IClassFixture<ApiTestFactory>
{
    private readonly HttpClient _client;
    private readonly ApiTestFactory _factory;

    public IslamicFinanceMurabahaContractQaTests(ApiTestFactory factory)
    {
        _factory = factory;
        _client = factory.CreateClient();
    }

    [Fact]
    public async Task Murabaha_Contract_Endpoints_Support_Generate_List_Detail_And_Regeneration()
    {
        await _client.AuthenticateAsInternalAsync();
        var murabahaCaseId = SeedApprovedMurabahaCaseWithTemplate();

        var firstResponse = await _client.PostAsJsonAsync(
            $"/api/v1/islamic-finance/murabaha-cases/{murabahaCaseId}/generate-contract",
            new GenerateIslamicFinanceMurabahaContractRequest());

        Assert.Equal(HttpStatusCode.OK, firstResponse.StatusCode);
        var first = await firstResponse.Content.ReadFromJsonAsync<DocumentAttachmentResponse>();
        Assert.NotNull(first);
        Assert.Equal(1, first!.VersionNumber);

        var secondResponse = await _client.PostAsJsonAsync(
            $"/api/v1/islamic-finance/murabaha-cases/{murabahaCaseId}/generate-contract",
            new GenerateIslamicFinanceMurabahaContractRequest
            {
                ReasonText = "Regenerate contract for baseline refresh."
            });

        Assert.Equal(HttpStatusCode.OK, secondResponse.StatusCode);
        var second = await secondResponse.Content.ReadFromJsonAsync<DocumentAttachmentResponse>();
        Assert.NotNull(second);
        Assert.Equal(2, second!.VersionNumber);

        var listResponse = await _client.GetAsync($"/api/v1/islamic-finance/murabaha-cases/{murabahaCaseId}/contracts");
        Assert.Equal(HttpStatusCode.OK, listResponse.StatusCode);
        var list = await listResponse.Content.ReadFromJsonAsync<DocumentAttachmentResponse[]>();
        Assert.NotNull(list);
        Assert.Equal(2, list!.Length);
        Assert.Contains(list, entry => entry.DocumentLinkId == first.DocumentLinkId && entry.LifecycleStatusCode == "SUPERSEDED");
        Assert.Contains(list, entry => entry.DocumentLinkId == second.DocumentLinkId && entry.LifecycleStatusCode == "ACTIVE");

        var detailResponse = await _client.GetAsync($"/api/v1/islamic-finance/murabaha-cases/{murabahaCaseId}/contracts/{second.DocumentLinkId}");
        Assert.Equal(HttpStatusCode.OK, detailResponse.StatusCode);
    }

    [Fact]
    public async Task Murabaha_Contract_Generation_Blocks_Without_Template()
    {
        await _client.AuthenticateAsInternalAsync();
        var murabahaCaseId = SeedApprovedMurabahaCaseWithoutTemplate();

        var response = await _client.PostAsJsonAsync(
            $"/api/v1/islamic-finance/murabaha-cases/{murabahaCaseId}/generate-contract",
            new GenerateIslamicFinanceMurabahaContractRequest());

        Assert.Equal(HttpStatusCode.BadRequest, response.StatusCode);
    }

    private long SeedApprovedMurabahaCaseWithTemplate()
    {
        using var scope = _factory.Services.CreateScope();
        var dbContext = scope.ServiceProvider.GetRequiredService<CashLineErpDbContext>();

        var partnerService = new IslamicFinancePartnerService(new IslamicFinancePartnerRepository(dbContext));
        var productService = new IslamicFinanceProductService(new IslamicFinanceProductRepository(dbContext));
        var facilityService = new IslamicFinanceFacilityService(new IslamicFinanceFacilityRepository(dbContext));
        var templateService = new IslamicFinanceContractTemplateService(new IslamicFinanceContractTemplateRepository(dbContext));
        var requestRepository = new IslamicFinanceRequestRepository(dbContext);
        var requestService = new IslamicFinanceRequestService(requestRepository);
        var shariahReviewService = new ShariahReviewService(new ShariahReviewRepository(dbContext));
        var murabahaService = new MurabahaCaseService(new MurabahaCaseRepository(dbContext));

        var partner = CreateActivePartner(partnerService);
        var product = CreateActiveProduct(productService);
        var facility = CreateActiveFacility(facilityService, partner.Id, product.Id);
        var template = CreateActiveTemplate(templateService, product.Id);
        var request = CreateApprovedAssignedRequest(requestService, requestRepository, shariahReviewService, partner.Id, product.Id, facility.Id);

        var created = murabahaService.CreateCase(new CreateIslamicFinanceMurabahaCaseRequest
        {
            CaseNumber = $"MUR-CON-{Guid.NewGuid():N}"[..12].ToUpperInvariant(),
            FinancingRequestId = request.Id,
            CustomerPartyId = 1,
            PartnerLenderId = partner.Id,
            SupplierPartyId = 2,
            ProductProfileId = product.Id,
            ContractTemplateId = template.Id,
            TransactionCurrencyCode = "EGP",
            PurchaseCostAmount = 100000m,
            ProfitAmount = 20000m
        });

        murabahaService.SubmitCase(created.Id, 3);
        return murabahaService.ApproveCase(created.Id, 4).Id;
    }

    private long SeedApprovedMurabahaCaseWithoutTemplate()
    {
        using var scope = _factory.Services.CreateScope();
        var dbContext = scope.ServiceProvider.GetRequiredService<CashLineErpDbContext>();

        var partnerService = new IslamicFinancePartnerService(new IslamicFinancePartnerRepository(dbContext));
        var productService = new IslamicFinanceProductService(new IslamicFinanceProductRepository(dbContext));
        var facilityService = new IslamicFinanceFacilityService(new IslamicFinanceFacilityRepository(dbContext));
        var requestRepository = new IslamicFinanceRequestRepository(dbContext);
        var requestService = new IslamicFinanceRequestService(requestRepository);
        var shariahReviewService = new ShariahReviewService(new ShariahReviewRepository(dbContext));
        var murabahaService = new MurabahaCaseService(new MurabahaCaseRepository(dbContext));

        var partner = CreateActivePartner(partnerService);
        var product = CreateActiveProduct(productService);
        var facility = CreateActiveFacility(facilityService, partner.Id, product.Id);
        var request = CreateApprovedAssignedRequest(requestService, requestRepository, shariahReviewService, partner.Id, product.Id, facility.Id);

        var created = murabahaService.CreateCase(new CreateIslamicFinanceMurabahaCaseRequest
        {
            CaseNumber = $"MUR-NOTPL-{Guid.NewGuid():N}"[..12].ToUpperInvariant(),
            FinancingRequestId = request.Id,
            CustomerPartyId = 1,
            PartnerLenderId = partner.Id,
            SupplierPartyId = 2,
            ProductProfileId = product.Id,
            TransactionCurrencyCode = "EGP",
            PurchaseCostAmount = 100000m,
            ProfitAmount = 20000m
        });

        murabahaService.SubmitCase(created.Id, 3);
        return murabahaService.ApproveCase(created.Id, 4).Id;
    }

    private static IslamicFinancePartnerLenderResponse CreateActivePartner(IslamicFinancePartnerService service)
    {
        var existing = service.GetPartnerLenders(activeOnly: true).FirstOrDefault(entry => entry.PartnerLenderPartyId == 1);
        if (existing is not null)
        {
            return existing;
        }

        var created = service.CreatePartnerLender(new CreateIslamicFinancePartnerLenderRequest
        {
            PartnerLenderPartyId = 1,
            DefaultCurrencyCode = "EGP",
            SupportsMurabaha = true,
            SupportsReceivablesFinance = false,
            SupportsTawarruq = false
        });

        service.SubmitPartnerLender(created.Id, 3);
        service.ApprovePartnerLender(created.Id, 4);
        return service.ActivatePartnerLender(created.Id, 4);
    }

    private static IslamicFinanceProductProfileResponse CreateActiveProduct(IslamicFinanceProductService service)
    {
        var created = service.CreateProductProfile(new CreateIslamicFinanceProductProfileRequest
        {
            ProductType = "MURABAHA",
            ProductCode = $"MUR-HCON-{Guid.NewGuid():N}"[..12].ToUpperInvariant(),
            ProductName = "Murabaha Contract HTTP Product",
            RequiresShariahReview = true,
            AllowsPartnerFunding = true,
            AllowsCashLineFunding = false
        });

        service.SubmitProductProfile(created.Id, 3);
        service.ApproveProductProfile(created.Id, 4);
        return service.ActivateProductProfile(created.Id, 4);
    }

    private static IslamicFinanceFacilityResponse CreateActiveFacility(
        IslamicFinanceFacilityService service,
        long partnerLenderId,
        long productProfileId)
    {
        var created = service.CreateFacility(new CreateIslamicFinanceFacilityRequest
        {
            PartnerLenderId = partnerLenderId,
            CustomerPartyId = 1,
            ProductProfileId = productProfileId,
            FacilityNumber = $"FAC-HCON-{Guid.NewGuid():N}"[..12].ToUpperInvariant(),
            CurrencyCode = "EGP",
            ApprovedLimitAmount = 300000m,
            UtilizedAmount = 0m
        });

        service.SubmitFacility(created.Id, 3);
        service.ApproveFacility(created.Id, 4);
        return service.ActivateFacility(created.Id, 4);
    }

    private static IslamicFinanceContractTemplateResponse CreateActiveTemplate(
        IslamicFinanceContractTemplateService service,
        long productProfileId)
    {
        var created = service.CreateContractTemplate(new CreateIslamicFinanceContractTemplateRequest
        {
            ProductProfileId = productProfileId,
            TemplateCode = $"TPL-HCON-{Guid.NewGuid():N}"[..12].ToUpperInvariant(),
            TemplateName = "Murabaha Contract HTTP Template",
            LanguageCode = "EN"
        });

        service.SubmitContractTemplate(created.Id, 3);
        service.ApproveContractTemplate(created.Id, 4);
        return service.ActivateContractTemplate(created.Id, 4);
    }

    private static IslamicFinanceFinancingRequestResponse CreateApprovedAssignedRequest(
        IslamicFinanceRequestService requestService,
        IslamicFinanceRequestRepository requestRepository,
        ShariahReviewService shariahReviewService,
        long partnerLenderId,
        long productProfileId,
        long facilityId)
    {
        var created = requestService.CreateRequest(new CreateIslamicFinanceFinancingRequestRequest
        {
            RequestNumber = $"REQ-HCON-{Guid.NewGuid():N}"[..12].ToUpperInvariant(),
            CustomerPartyId = 1,
            ProductProfileId = productProfileId,
            FacilityId = facilityId,
            FundingSourceMode = "PARTNER",
            SourceDocumentType = "SALES_ORDER",
            SourceDocumentId = 9501,
            TransactionCurrencyCode = "EGP",
            RequestedAmount = 120000m
        });
        requestService.SubmitRequest(created.Id, 3);
        requestService.ApproveRequest(created.Id, 4);

        var review = shariahReviewService.CreateReviewCase(new CreateIslamicFinanceShariahReviewRequest
        {
            ReviewCaseNumber = $"SHR-HCON-{Guid.NewGuid():N}"[..12].ToUpperInvariant(),
            ProductProfileId = productProfileId,
            FinancingRequestId = created.Id,
            ReviewReasonCode = "SHARIAH_REVIEW"
        });
        shariahReviewService.SubmitReviewCase(review.Id, 3);
        shariahReviewService.RecommendOutcome(review.Id, new RecommendIslamicFinanceShariahOutcomeRequest
        {
            ReviewOutcomeCode = "APPROVED",
            ReviewNotes = "Approved for Murabaha contract HTTP generation."
        }, 3);
        shariahReviewService.ApproveOutcome(review.Id, 4);

        requestService.AttachShariahReview(created.Id, new AttachIslamicFinanceShariahReviewRequest
        {
            ShariahReviewCaseId = review.Id
        }, 3);
        requestRepository.AssignPartnerLender(created.Id, partnerLenderId, 3);

        return created;
    }
}
