using Microsoft.Extensions.Logging;
using Moq;
using PowderCoating.Application.DTOs.Quote;
using PowderCoating.Application.Services;
using PowderCoating.Core.Entities;
using PowderCoating.Core.Interfaces;
using Xunit;

namespace PowderCoating.UnitTests;

public class PricingCalculationServiceTests
{
    [Fact]
    public async Task CalculateCoatPriceAsync_CustomPowder_ChargesFullOrderQuantity()
    {
        var costs = CreateOperatingCosts();
        var unitOfWork = CreateUnitOfWorkMock(costs);
        var tenantContext = new Mock<ITenantContext>();
        tenantContext.Setup(x => x.UseMetricSystemAsync()).ReturnsAsync(false);

        var service = new PricingCalculationService(
            unitOfWork.Object,
            Mock.Of<ILogger<PricingCalculationService>>(),
            new MeasurementConversionService(),
            tenantContext.Object);

        var coat = new CreateQuoteItemCoatDto
        {
            CoatName = "Custom Red",
            PowderCostPerLb = 10m,
            PowderToOrder = 3m,
            CoverageSqFtPerLb = 30m,
            TransferEfficiency = 65m
        };

        var result = await service.CalculateCoatPriceAsync(
            coat,
            itemSurfaceAreaSqFt: 5m,
            quantity: 2m,
            coatIndex: 0,
            estimatedMinutesBase: 15,
            companyId: 1);

        Assert.Equal(30m, result.CoatMaterialCost);
        Assert.Equal(30m, result.CoatLaborCost);
        Assert.Equal(60m, result.CoatTotalCost);
    }

    [Fact]
    public async Task CalculateQuoteItemPriceAsync_LaborItem_UsesStandardLaborRate()
    {
        var costs = CreateOperatingCosts();
        costs.StandardLaborRate = 80m;

        var unitOfWork = CreateUnitOfWorkMock(costs);
        var tenantContext = new Mock<ITenantContext>();
        tenantContext.Setup(x => x.UseMetricSystemAsync()).ReturnsAsync(false);

        var service = new PricingCalculationService(
            unitOfWork.Object,
            Mock.Of<ILogger<PricingCalculationService>>(),
            new MeasurementConversionService(),
            tenantContext.Object);

        var item = new CreateQuoteItemDto
        {
            Description = "Shop labor",
            IsLaborItem = true,
            Quantity = 2.5m
        };

        var result = await service.CalculateQuoteItemPriceAsync(item, companyId: 1);

        Assert.Equal(0m, result.MaterialCost);
        Assert.Equal(200m, result.LaborCost);
        Assert.Equal(80m, result.UnitPrice);
        Assert.Equal(200m, result.TotalPrice);
    }

    [Fact]
    public async Task CalculateQuoteItemPriceAsync_AiItem_UsesManualUnitPriceWithoutAdditionalCosts()
    {
        var unitOfWork = CreateUnitOfWorkMock(CreateOperatingCosts());
        var tenantContext = new Mock<ITenantContext>();
        tenantContext.Setup(x => x.UseMetricSystemAsync()).ReturnsAsync(false);

        var service = new PricingCalculationService(
            unitOfWork.Object,
            Mock.Of<ILogger<PricingCalculationService>>(),
            new MeasurementConversionService(),
            tenantContext.Object);

        var item = new CreateQuoteItemDto
        {
            Description = "AI wheel estimate",
            IsAiItem = true,
            ManualUnitPrice = 123m,
            Quantity = 2m
        };

        var result = await service.CalculateQuoteItemPriceAsync(item, companyId: 1);

        Assert.Equal(0m, result.MaterialCost);
        Assert.Equal(0m, result.LaborCost);
        Assert.Equal(123m, result.UnitPrice);
        Assert.Equal(246m, result.TotalPrice);
    }

    [Fact]
    public async Task CalculateQuoteTotalsAsync_AppliesTierDiscount_QuoteDiscount_RushFee_AndTax()
    {
        var costs = CreateOperatingCosts();
        costs.StandardLaborRate = 100m;
        costs.ShopSuppliesRate = 10m;
        costs.RushChargeType = "Percentage";
        costs.RushChargePercentage = 20m;
        costs.TaxPercent = 5m;
        costs.OvenOperatingCostPerHour = 0m;
        costs.MonthlyRent = 0m;
        costs.MonthlyUtilities = 0m;

        var customerRepo = new Mock<IRepository<Customer>>();
        customerRepo
            .Setup(x => x.FindAsync(It.IsAny<System.Linq.Expressions.Expression<Func<Customer, bool>>>(), false, It.IsAny<System.Linq.Expressions.Expression<Func<Customer, object>>[]>()))
            .ReturnsAsync(new[]
            {
                new Customer { Id = 1, CompanyId = 1, PricingTierId = 10 }
            });

        var pricingTierRepo = new Mock<IRepository<PricingTier>>();
        pricingTierRepo
            .Setup(x => x.GetByIdAsync(10, false, It.IsAny<System.Linq.Expressions.Expression<Func<PricingTier, object>>[]>()))
            .ReturnsAsync(new PricingTier { Id = 10, CompanyId = 1, DiscountPercent = 10m });

        var unitOfWork = CreateUnitOfWorkMock(costs);
        unitOfWork.SetupGet(x => x.Customers).Returns(customerRepo.Object);
        unitOfWork.SetupGet(x => x.PricingTiers).Returns(pricingTierRepo.Object);

        var tenantContext = new Mock<ITenantContext>();
        tenantContext.Setup(x => x.UseMetricSystemAsync()).ReturnsAsync(false);

        var service = new PricingCalculationService(
            unitOfWork.Object,
            Mock.Of<ILogger<PricingCalculationService>>(),
            new MeasurementConversionService(),
            tenantContext.Object);

        var items = new List<CreateQuoteItemDto>
        {
            new()
            {
                Description = "Labor item",
                IsLaborItem = true,
                Quantity = 2m
            }
        };

        var result = await service.CalculateQuoteTotalsAsync(
            items,
            companyId: 1,
            customerId: 1,
            discountType: "FixedAmount",
            discountValue: 5m,
            isRushJob: true);

        Assert.Equal(200m, result.ItemsSubtotal);
        Assert.Equal(20m, result.ShopSuppliesAmount);
        Assert.Equal(220m, result.SubtotalBeforeDiscount);
        Assert.Equal(22m, result.PricingTierDiscountAmount);
        Assert.Equal(5m, result.QuoteDiscountAmount);
        Assert.Equal(193m, result.SubtotalAfterDiscount);
        Assert.Equal(38.6m, result.RushFee);
        Assert.Equal(11.58m, result.TaxAmount);
        Assert.Equal(243.18m, result.Total);
    }

    private static Mock<IUnitOfWork> CreateUnitOfWorkMock(CompanyOperatingCosts costs)
    {
        var unitOfWork = new Mock<IUnitOfWork>();

        var companyOperatingCostsRepo = new Mock<IRepository<CompanyOperatingCosts>>();
        companyOperatingCostsRepo
            .Setup(x => x.FindAsync(It.IsAny<System.Linq.Expressions.Expression<Func<CompanyOperatingCosts, bool>>>(), false, It.IsAny<System.Linq.Expressions.Expression<Func<CompanyOperatingCosts, object>>[]>()))
            .ReturnsAsync(new[] { costs });

        var inventoryRepo = new Mock<IRepository<InventoryItem>>();
        inventoryRepo
            .Setup(x => x.GetByIdAsync(It.IsAny<int>(), false, It.IsAny<System.Linq.Expressions.Expression<Func<InventoryItem, object>>[]>()))
            .ReturnsAsync((InventoryItem?)null);

        var catalogRepo = new Mock<IRepository<CatalogItem>>();
        catalogRepo
            .Setup(x => x.GetByIdAsync(It.IsAny<int>(), false, It.IsAny<System.Linq.Expressions.Expression<Func<CatalogItem, object>>[]>()))
            .ReturnsAsync((CatalogItem?)null);

        var customerRepo = new Mock<IRepository<Customer>>();
        customerRepo
            .Setup(x => x.FindAsync(It.IsAny<System.Linq.Expressions.Expression<Func<Customer, bool>>>(), false, It.IsAny<System.Linq.Expressions.Expression<Func<Customer, object>>[]>()))
            .ReturnsAsync(Array.Empty<Customer>());

        var pricingTierRepo = new Mock<IRepository<PricingTier>>();
        pricingTierRepo
            .Setup(x => x.GetByIdAsync(It.IsAny<int>(), false, It.IsAny<System.Linq.Expressions.Expression<Func<PricingTier, object>>[]>()))
            .ReturnsAsync((PricingTier?)null);

        unitOfWork.SetupGet(x => x.CompanyOperatingCosts).Returns(companyOperatingCostsRepo.Object);
        unitOfWork.SetupGet(x => x.InventoryItems).Returns(inventoryRepo.Object);
        unitOfWork.SetupGet(x => x.CatalogItems).Returns(catalogRepo.Object);
        unitOfWork.SetupGet(x => x.Customers).Returns(customerRepo.Object);
        unitOfWork.SetupGet(x => x.PricingTiers).Returns(pricingTierRepo.Object);

        return unitOfWork;
    }

    private static CompanyOperatingCosts CreateOperatingCosts()
    {
        return new CompanyOperatingCosts
        {
            Id = 1,
            CompanyId = 1,
            StandardLaborRate = 60m,
            AdditionalCoatLaborPercent = 50m,
            OvenOperatingCostPerHour = 25m,
            SandblasterCostPerHour = 20m,
            CoatingBoothCostPerHour = 10m,
            PowderCoatingCostPerSqFt = 1m,
            PricingMode = PowderCoating.Core.Enums.PricingMode.MarkupOnMaterial,
            GeneralMarkupPercentage = 20m,
            TargetMarginPercent = 40m,
            TaxPercent = 5m,
            ShopSuppliesRate = 10m,
            DefaultOvenCycleMinutes = 60,
            RushChargeType = "Percentage",
            RushChargePercentage = 15m,
            RushChargeFixedAmount = 50m,
            ShopMinimumCharge = 0m,
            ComplexitySimplePercent = 0m,
            ComplexityModeratePercent = 5m,
            ComplexityComplexPercent = 15m,
            ComplexityExtremePercent = 25m,
            MonthlyBillableHours = 160
        };
    }
}