using System.Net;
using CartWise.Domain.Entities;
using CartWise.Domain.Enums;
using CartWise.Infrastructure.Data;
using Microsoft.AspNetCore.Mvc.Testing;
using Microsoft.Extensions.DependencyInjection;

namespace CartWise.Web.Tests;

public class PriceAccessControlTests : IClassFixture<CartWiseWebApplicationFactory>
{
    private readonly CartWiseWebApplicationFactory _factory;

    public PriceAccessControlTests(CartWiseWebApplicationFactory factory)
    {
        _factory = factory;
    }

    [Fact]
    public async Task AnonymousUser_IsRedirectedToLoginWhenRequestingPrices()
    {
        var client = _factory.CreateClient(new WebApplicationFactoryClientOptions { AllowAutoRedirect = false });

        var response = await client.GetAsync("/prices");

        Assert.Equal(HttpStatusCode.Redirect, response.StatusCode);
        Assert.Contains("/Account/Login", response.Headers.Location?.ToString());
    }

    [Fact]
    public async Task AuthenticatedUser_WithNoObservations_SeesEmptyState()
    {
        var client = _factory.CreateClient();
        await WebTestHelpers.RegisterAsync(client, "pricesempty1@example.com", "Price Watcher");
        await WebTestHelpers.CreateHouseholdAsync(client, "Price Empty Household");

        var response = await client.GetAsync("/prices");

        response.EnsureSuccessStatusCode();
        var body = await response.Content.ReadAsStringAsync();
        HtmlAssert.Contains("No prices recorded yet", body);
    }

    [Fact]
    public async Task ProductPage_ReturnsNotFoundForUnknownProduct()
    {
        var client = _factory.CreateClient();
        await WebTestHelpers.RegisterAsync(client, "pricesunknown1@example.com", "Price Watcher 2");
        await WebTestHelpers.CreateHouseholdAsync(client, "Price Unknown Household");

        var response = await client.GetAsync($"/prices/product/{Guid.NewGuid()}");

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

    [Fact]
    public async Task ObserveThenViewProduct_ShowsLoggedPriceInHistory()
    {
        var client = _factory.CreateClient();
        await WebTestHelpers.RegisterAsync(client, "pricesobserve1@example.com", "Price Observer");
        await WebTestHelpers.CreateHouseholdAsync(client, "Price Observe Household");

        var productId = SeedProduct("Observed Oats");

        var productHtml = await client.GetStringAsync($"/prices/product/{productId}");
        HtmlAssert.Contains("No price history yet", productHtml);
        var token = WebTestHelpers.ExtractAntiForgeryToken(productHtml);

        var observeResponse = await client.PostAsync($"/prices/product/{productId}/observe", new FormUrlEncodedContent(new Dictionary<string, string>
        {
            ["__RequestVerificationToken"] = token,
            ["price"] = "3.49"
        }));
        observeResponse.EnsureSuccessStatusCode();

        var afterObserveHtml = await observeResponse.Content.ReadAsStringAsync();
        HtmlAssert.Contains("$3.49", afterObserveHtml);

        var indexHtml = await client.GetStringAsync("/prices");
        HtmlAssert.Contains("Observed Oats", indexHtml);
    }

    [Fact]
    public async Task EachHousehold_OnlySeesItsOwnPriceHistory()
    {
        var clientA = _factory.CreateClient();
        var clientB = _factory.CreateClient();
        await WebTestHelpers.RegisterAsync(clientA, "pricesalice1@example.com", "Price Alice");
        await WebTestHelpers.RegisterAsync(clientB, "pricesbob1@example.com", "Price Bob");
        await WebTestHelpers.CreateHouseholdAsync(clientA, "Price Household A");
        await WebTestHelpers.CreateHouseholdAsync(clientB, "Price Household B");

        var productId = SeedProduct("Shared Catalog Item");

        var productHtmlA = await clientA.GetStringAsync($"/prices/product/{productId}");
        var tokenA = WebTestHelpers.ExtractAntiForgeryToken(productHtmlA);
        await clientA.PostAsync($"/prices/product/{productId}/observe", new FormUrlEncodedContent(new Dictionary<string, string>
        {
            ["__RequestVerificationToken"] = tokenA,
            ["price"] = "9.99"
        }));

        var indexB = await clientB.GetStringAsync("/prices");

        Assert.DoesNotContain("Shared Catalog Item", indexB);
    }

    private Guid SeedProduct(string name)
    {
        using var scope = _factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<CartWiseDbContext>();
        var product = new Product(name, ProductSourceType.Manual, DateTime.UtcNow);
        db.Products.Add(product);
        db.SaveChanges();
        return product.ProductId;
    }
}