using System.Security.Claims;
using Microsoft.AspNetCore.Http;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using Moq;
using PowderCoating.Application.DTOs.Quote;
using PowderCoating.Application.Interfaces;
using PowderCoating.Application.Services;
using PowderCoating.Core.Entities;
using PowderCoating.Infrastructure.Data;
using PowderCoating.Infrastructure.Repositories;

namespace PowderCoating.UnitTests;

public class QuotePricingAssemblyServiceTests
{
    [Fact]
    public void ApplyPricingSnapshot_CopiesAllTotalsToQuote()
    {
        var service = CreateService(CreateContext(), Mock.Of<IPricingCalculationService>());
        var quote = new Quote();
        var pricing = new QuotePricingResult
        {
            MaterialCosts = 10m,
            LaborCosts = 20m,
            EquipmentCosts = 30m,
            ItemsSubtotal = 40m,
            OvenBatchCost = 50m,
            ShopSuppliesAmount = 60m,
            ShopSuppliesPercent = 7m,
            OverheadCosts = 80m,
            OverheadPercent = 9m,
            ProfitMargin = 100m,
            ProfitPercent = 11m,
            SubtotalBeforeDiscount = 120m,
            DiscountPercent = 13m,
            DiscountAmount = 14m,
            RushFee = 15m,
            TaxAmount = 16m,
            Total = 17m
        };

        service.ApplyPricingSnapshot(quote, pricing);

        Assert.Equal(10m, quote.MaterialCosts);
        Assert.Equal(20m, quote.LaborCosts);
        Assert.Equal(30m, quote.EquipmentCosts);
        Assert.Equal(40m, quote.ItemsSubtotal);
        Assert.Equal(50m, quote.OvenBatchCost);
        Assert.Equal(60m, quote.ShopSuppliesAmount);
        Assert.Equal(7m, quote.ShopSuppliesPercent);
        Assert.Equal(80m, quote.OverheadAmount);
        Assert.Equal(9m, quote.OverheadPercent);
        Assert.Equal(100m, quote.ProfitMargin);
        Assert.Equal(11m, quote.ProfitPercent);
        Assert.Equal(120m, quote.SubTotal);
        Assert.Equal(13m, quote.DiscountPercent);
        Assert.Equal(14m, quote.DiscountAmount);
        Assert.Equal(15m, quote.RushFee);
        Assert.Equal(16m, quote.TaxAmount);
        Assert.Equal(17m, quote.Total);
    }

    [Fact]
    public async Task CreateQuoteItemsAsync_PreservesManualAndCalculatedPricingPaths()
    {
        await using var context = CreateContext();
        context.AiItemPredictions.Add(new AiItemPrediction
        {
            Id = 91,
            CompanyId = 1,
            PredictedSurfaceAreaSqFt = 4m,
            PredictedUnitPrice = 100m,
            PredictedMinutes = 15,
            PredictedComplexity = "Moderate",
            Confidence = "High"
        });
        await context.SaveChangesAsync();

        var pricingService = new Mock<IPricingCalculationService>();
        pricingService
            .Setup(x => x.CalculateQuoteItemPriceAsync(
                It.Is<CreateQuoteItemDto>(i => i.Description == "Custom frame"),
                1,
                null))
            .ReturnsAsync(new QuoteItemPricingResult
            {
                UnitPrice = 77m,
                TotalPrice = 154m,
                MaterialCost = 22m,
                LaborCost = 33m,
                EquipmentCost = 11m
            });
        pricingService
            .Setup(x => x.CalculateCoatPriceAsync(
                It.IsAny<CreateQuoteItemCoatDto>(),
                12m,
                2m,
                0,
                25,
                1))
            .ReturnsAsync(new QuoteItemCoatPricingResult
            {
                CoatMaterialCost = 5m,
                CoatLaborCost = 6m,
                CoatTotalCost = 11m
            });

        var service = CreateService(context, pricingService.Object);

        var items = await service.CreateQuoteItemsAsync(
        [
            new CreateQuoteItemDto
            {
                Description = "AI wheel",
                Quantity = 2m,
                SurfaceAreaSqFt = 5m,
                EstimatedMinutes = 20,
                IsAiItem = true,
                ManualUnitPrice = 123m,
                AiPredictionId = 91
            },
            new CreateQuoteItemDto
            {
                Description = "Shop tumbler",
                Quantity = 3m,
                IsSalesItem = true,
                Sku = "TMB-20",
                ManualUnitPrice = 18m,
                IncludePrepCost = false
            },
            new CreateQuoteItemDto
            {
                Description = "Custom frame",
                Quantity = 2m,
                SurfaceAreaSqFt = 12m,
                EstimatedMinutes = 25,
                RequiresSandblasting = true,
                Notes = "Calculated path",
                Coats =
                [
                    new CreateQuoteItemCoatDto
                    {
                        CoatName = "Top Coat",
                        Sequence = 1,
                        ColorName = "Black",
                        CoverageSqFtPerLb = 30m,
                        TransferEfficiency = 65m
                    }
                ],
                PrepServices =
                [
                    new CreateQuoteItemPrepServiceDto
                    {
                        PrepServiceId = 7,
                        EstimatedMinutes = 15,
                        BlastSetupId = 44
                    }
                ]
            }
        ],
            quoteId: 55,
            companyId: 1,
            ovenRateOverride: null,
            createdAtUtc: new DateTime(2026, 5, 9, 15, 0, 0, DateTimeKind.Utc));

        Assert.Equal(3, items.Count);

        var aiItem = items.Single(i => i.Description == "AI wheel");
        Assert.Equal(123m, aiItem.UnitPrice);
        Assert.Equal(246m, aiItem.TotalPrice);

        var salesItem = items.Single(i => i.Description == "Shop tumbler");
        Assert.True(salesItem.IsSalesItem);
        Assert.Equal("TMB-20", salesItem.Sku);
        Assert.False(salesItem.IncludePrepCost);
        Assert.Equal(18m, salesItem.UnitPrice);
        Assert.Equal(54m, salesItem.TotalPrice);

        var customItem = items.Single(i => i.Description == "Custom frame");
        Assert.Equal(77m, customItem.UnitPrice);
        Assert.Equal(154m, customItem.TotalPrice);
        Assert.Equal(22m, customItem.ItemMaterialCost);
        Assert.Equal(33m, customItem.ItemLaborCost);
        Assert.Equal(11m, customItem.ItemEquipmentCost);
        var customPrep = Assert.Single(customItem.PrepServices);
        Assert.Equal(44, customPrep.BlastSetupId);
        var customCoat = Assert.Single(customItem.Coats);
        Assert.Equal(11m, customCoat.CoatTotalCost);

        var prediction = await context.AiItemPredictions.SingleAsync();
        Assert.True(prediction.UserOverrodeEstimate);
    }

    [Fact]
    public async Task CreateQuoteItemsAsync_CatalogItemWithoutCoats_UsesCatalogDefaultPrice()
    {
        await using var context = CreateContext();
        context.CatalogItems.Add(new CatalogItem
        {
            Id = 22,
            CompanyId = 1,
            Name = "Gate Hinge",
            DefaultPrice = 42.5m
        });
        await context.SaveChangesAsync();

        var service = CreateService(context, Mock.Of<IPricingCalculationService>());

        var item = Assert.Single(await service.CreateQuoteItemsAsync(
        [
            new CreateQuoteItemDto
            {
                Description = "Catalog hinge",
                Quantity = 4m,
                CatalogItemId = 22
            }
        ],
            quoteId: 1,
            companyId: 1,
            ovenRateOverride: null,
            createdAtUtc: DateTime.UtcNow));

        Assert.Equal(42.5m, item.UnitPrice);
        Assert.Equal(170m, item.TotalPrice);
    }

    [Fact]
    public async Task CreateQuoteItemsAsync_AddAsIncoming_CreatesInventoryItemAndLinksCoat()
    {
        await using var context = CreateContext();
        context.Set<PowderCatalogItem>().Add(new PowderCatalogItem
        {
            Id = 5,
            VendorName = "Prismatic Powders",
            Sku = "P-1001",
            ColorName = "Candy Red",
            UnitPrice = 19.5m,
            CoverageSqFtPerLb = 85m,
            TransferEfficiency = 70m
        });
        await context.SaveChangesAsync();

        var pricingService = new Mock<IPricingCalculationService>();
        pricingService
            .Setup(x => x.CalculateQuoteItemPriceAsync(It.IsAny<CreateQuoteItemDto>(), 1, null))
            .ReturnsAsync(new QuoteItemPricingResult
            {
                UnitPrice = 50m,
                TotalPrice = 50m,
                MaterialCost = 10m,
                LaborCost = 20m,
                EquipmentCost = 5m
            });
        pricingService
            .Setup(x => x.CalculateCoatPriceAsync(It.IsAny<CreateQuoteItemCoatDto>(), 6m, 1m, 0, 10, 1))
            .ReturnsAsync(new QuoteItemCoatPricingResult
            {
                CoatMaterialCost = 3m,
                CoatLaborCost = 4m,
                CoatTotalCost = 7m
            });

        var service = CreateService(context, pricingService.Object);
        var dto = new CreateQuoteItemDto
        {
            Description = "Incoming powder item",
            Quantity = 1m,
            SurfaceAreaSqFt = 6m,
            EstimatedMinutes = 10,
            Coats =
            [
                new CreateQuoteItemCoatDto
                {
                    CoatName = "Base",
                    Sequence = 1,
                    CatalogItemId = 5,
                    AddAsIncoming = true,
                    PowderCostPerLb = 22m
                }
            ]
        };

        var item = Assert.Single(await service.CreateQuoteItemsAsync(
            [dto],
            quoteId: 9,
            companyId: 1,
            ovenRateOverride: null,
            createdAtUtc: DateTime.UtcNow));

        var inventoryItem = await context.InventoryItems.SingleAsync();
        var coat = Assert.Single(item.Coats);
        Assert.Equal(inventoryItem.Id, coat.InventoryItemId);
        Assert.True(inventoryItem.IsIncoming);
        Assert.Null(dto.Coats[0].PowderCostPerLb);
    }

    private static QuotePricingAssemblyService CreateService(ApplicationDbContext context, IPricingCalculationService pricingService)
    {
        return new QuotePricingAssemblyService(
            new UnitOfWork(context),
            pricingService,
            Mock.Of<IInventoryAiLookupService>(),
            Mock.Of<ILogger<QuotePricingAssemblyService>>());
    }

    private static ApplicationDbContext CreateContext()
    {
        var options = new DbContextOptionsBuilder<ApplicationDbContext>()
            .UseInMemoryDatabase(Guid.NewGuid().ToString())
            .Options;

        var identity = new ClaimsIdentity(
            [new Claim(ClaimTypes.Role, "SuperAdmin")],
            "Test");
        var principal = new ClaimsPrincipal(identity);

        byte[]? noBytes = null;
        var sessionMock = new Mock<ISession>();
        sessionMock.Setup(s => s.TryGetValue(It.IsAny<string>(), out noBytes)).Returns(false);

        var httpContextMock = new Mock<HttpContext>();
        httpContextMock.SetupGet(c => c.User).Returns(principal);
        httpContextMock.SetupGet(c => c.Session).Returns(sessionMock.Object);

        var accessor = new Mock<IHttpContextAccessor>();
        accessor.SetupGet(a => a.HttpContext).Returns(httpContextMock.Object);

        return new ApplicationDbContext(options, accessor.Object, null!);
    }
}