using System.Net;
using Microsoft.AspNetCore.Components;
using System.Globalization;
using Bunit;
using Microsoft.Extensions.DependencyInjection;
using Prefab.Web.Client.Models.Catalog;
using Prefab.Web.Client.Models.Shared;
using Prefab.Web.Client.Pages.Browse;
using Prefab.Web.Client.Services;
using Shouldly;

namespace Prefab.Tests.Web.Client.Pages;

[Trait(TraitName.Category, TraitCategory.Unit)]
public sealed class ProductPageTests : BunitContext
{
    [Fact]
    public void ProductPage_Renders_Product_Details_From_Service()
    {
        var model = CreateSampleProduct();
        Services.AddScoped<IProductDisplayService>(_ =>
            new FakeProductDisplayService(Result<ProductDisplayModel>.Success(model)));

        var navigation = Services.GetRequiredService<NavigationManager>();
        navigation.NavigateTo(navigation.GetUriWithQueryParameter("slug", model.Slug));

        var component = Render<Product>();

        component.Markup.ShouldContain(model.Name);
        model.Description.ShouldNotBeNull();
        component.Markup.ShouldContain(model.Description!);
        component.FindAll("input[type=radio]").Count.ShouldBe(2);
        component.Markup.ShouldContain("Quantity");
        component.FindAll(".product__add-to-cart").Count.ShouldBe(1);
        component.Markup.ShouldContain("Documents");
        component.Markup.ShouldContain("Spec Sheet");
        component.Markup.ShouldContain("SW-001");
        component.Markup.ShouldContain("Lighting");
        var expectedPrice = model.BasePrice!.Value.ToString("C", CultureInfo.CurrentCulture);
        component.Markup.ShouldContain(expectedPrice);
    }

    [Fact]
    public void ProductPage_Shows_Problem_When_NotFound()
    {
        Services.AddScoped<IProductDisplayService>(_ =>
            new FakeProductDisplayService(Result<ProductDisplayModel>.Failure(new ResultProblem
            {
                Title = "Product not found.",
                Detail = "Product 'unknown' was not found.",
                StatusCode = (int)HttpStatusCode.NotFound
            })));

        var navigation = Services.GetRequiredService<NavigationManager>();
        navigation.NavigateTo(navigation.GetUriWithQueryParameter("slug", "unknown"));

        var component = Render<Product>();

        component.Markup.ShouldContain("Product not found.");
        component.FindAll(".alert-warning").Count.ShouldBe(1);
    }

    private static ProductDisplayModel CreateSampleProduct() => new()
    {
        Id = Guid.NewGuid(),
        Slug = "sample-widget",
        Name = "Sample Widget",
        Description = "<p>Sample description.</p>",
        BasePrice = 42.50m,
        Sku = "SW-001",
        Categories =
        [
            new ProductDisplayModel.CategoryRef(Guid.NewGuid(), "Lighting", "lighting")
        ],
        Options =
        [
            new ProductDisplayModel.OptionDefinition(
                Id: Guid.NewGuid(),
                Code: "color",
                Name: "Color",
                DataType: 0,
                IsVariantAxis: true,
                Unit: null,
                Min: null,
                Max: null,
                Step: null,
                PricePerUnit: null,
                Tiers: Array.Empty<ProductDisplayModel.Tier>(),
                Values:
                [
                    new ProductDisplayModel.OptionValue(Guid.NewGuid(), "red", "Red", 0m, 0),
                    new ProductDisplayModel.OptionValue(Guid.NewGuid(), "blue", "Blue", 0m, 0)
                ]),
            new ProductDisplayModel.OptionDefinition(
                Id: Guid.NewGuid(),
                Code: "length",
                Name: "Length",
                DataType: 1,
                IsVariantAxis: false,
                Unit: "ft",
                Min: 1,
                Max: 10,
                Step: 1,
                PricePerUnit: null,
                Tiers:
                [
                    new ProductDisplayModel.Tier(1, 5, 1, null)
                ],
                Values: Array.Empty<ProductDisplayModel.OptionValue>())
        ],
        Specs =
        [
            new ProductDisplayModel.Spec("Weight", "25 lb", null, null)
        ],
        GenericAttributes = new Dictionary<string, string>
        {
            ["catalog.product.docs"] = """[{ "title": "Spec Sheet", "url": "https://example.com/spec.pdf" }]"""
        }
    };

    private sealed class FakeProductDisplayService(Result<ProductDisplayModel> result) : IProductDisplayService
    {
        private readonly Result<ProductDisplayModel> _result = result;

        public Task<Result<ProductDisplayModel>> Get(string slug, CancellationToken cancellationToken = default) =>
            Task.FromResult(_result);
    }
}