using Microsoft.Playwright;
using Microsoft.EntityFrameworkCore;
using Prefab.Catalog.Data;
using Prefab.Tests.Infrastructure;
using Shouldly;

namespace Prefab.Tests.EndToEnd;

[Collection("Prefab.Ephemeral")]
public sealed class ProductListingPlaywrightShould(PrefabCompositeFixture_Ephemeral fixture)
{
    [Fact]
    public async Task NavigateViaMegaMenuToLeafCategoryListing()
    {
        using var scope = fixture.CreateWebScope();

        var seeder = scope.ServiceProvider.GetRequiredService<Seeder>();
        await seeder.Execute(scope.ServiceProvider, TestContext.Current.CancellationToken);

        var catalogDb = scope.ServiceProvider.GetRequiredService<IModuleDbReadOnly>();
        var expectedSlugs = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
        {
            "ceiling-supports",
            "boxes-and-covers",
            "prefab-assemblies",
            "rod-strut-hardware"
        };

        var catalogReady = false;
        var maxAttempts = 120; // ~60 seconds total with 500ms delay
        for (var attempt = 1; attempt <= maxAttempts && !catalogReady; attempt++)
        {
            var slugs = await catalogDb.Categories
                .Where(category => category.Slug != null && expectedSlugs.Contains(category.Slug))
                .Select(category => category.Slug!)
                .ToListAsync(TestContext.Current.CancellationToken);

            if (slugs.Count == expectedSlugs.Count)
            {
                catalogReady = true;
                break;
            }

            if (attempt % 20 == 0)
            {
                Console.WriteLine($"[Playwright] catalog readiness attempt {attempt}: found [{string.Join(", ", slugs)}]");
            }

            await Task.Delay(500, TestContext.Current.CancellationToken);
        }

        catalogReady.ShouldBeTrue("Catalog seed should populate root categories before UI navigation.");

        using var playwright = await Playwright.CreateAsync();
        await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions { Headless = true });

        var context = await browser.NewContextAsync(new BrowserNewContextOptions
        {
            BaseURL = fixture.PrefabBaseAddress.ToString().TrimEnd('/')
        });

        var page = await context.NewPageAsync();

        await page.GotoAsync("/");
        await page.WaitForLoadStateAsync(LoadState.NetworkIdle);
        await page.WaitForFunctionAsync("window.Blazor && window.Blazor._internal && window.Blazor._internal.navigationManager");

        var menuItem = page.Locator("li.main-nav__item--with--menu").First;
        await menuItem.WaitForAsync(new LocatorWaitForOptions
        {
            State = WaitForSelectorState.Visible,
            Timeout = 60_000
        });
        var interceptDebug = await menuItem.EvaluateAsync<string?>(
            @"element => {
                if (!element) { return null; }
                const rect = element.getBoundingClientRect();
                const x = rect.left + rect.width / 2;
                const y = rect.top + rect.height / 2;
                const stack = document.elementsFromPoint(x, y);
                return stack.map(node => `${node.tagName.toLowerCase()}#${node.id}.${node.className}`).join(' > ');
            }");
        Console.WriteLine($"[Playwright] elementsFromPoint at nav center: {interceptDebug}");
        await menuItem.HoverAsync();
        var menuPanel = page.Locator("#productsMenuPanel");
        await menuPanel.WaitForAsync(new LocatorWaitForOptions
        {
            State = WaitForSelectorState.Attached,
            Timeout = 60_000
        });
        var boundingBox = await menuItem.BoundingBoxAsync();
        if (boundingBox is null)
        {
            throw new InvalidOperationException("Navigation menu item bounding box could not be determined.");
        }

        var menuReady = false;
        for (var attempt = 1; attempt <= 10 && !menuReady; attempt++)
        {
            var responseTask = page.WaitForResponseAsync(
                resp => resp.Url.Contains("/bff/nav-menu/"),
                new PageWaitForResponseOptions { Timeout = 5000 });

            await page.Mouse.MoveAsync(
                boundingBox.X + boundingBox.Width / 2,
                boundingBox.Y + boundingBox.Height / 2);
            await menuItem.DispatchEventAsync("mouseenter");
            await page.WaitForTimeoutAsync(350);

            IResponse? navResponse = null;
            try
            {
                navResponse = await responseTask;
            }
            catch (TimeoutException)
            {
                // No navigation menu response observed within the window; proceed to inspect DOM.
            }

            menuReady = await page.EvaluateAsync<bool>(
                "selector => document.querySelectorAll(selector).length > 0",
                "#productsMenuPanel .megamenu__links--root li");

            if (!menuReady)
            {
                var panelText = await menuPanel.InnerTextAsync();
                Console.WriteLine($"[Playwright] nav menu attempt {attempt} panel text: {panelText}");
                if (navResponse is not null)
                {
                    var payload = await navResponse.TextAsync();
                    Console.WriteLine($"[Playwright] nav menu attempt {attempt} response: {payload}");
                }
                else
                {
                    Console.WriteLine($"[Playwright] nav menu attempt {attempt} response: timed out waiting for /bff/nav-menu.");
                }

                await menuItem.DispatchEventAsync("mouseleave");
                await page.WaitForTimeoutAsync(900);
            }
        }

        menuReady.ShouldBeTrue("Mega menu should load category links within retry window.");

        var ceilingLink = menuPanel
            .GetByRole(AriaRole.Link, new() { Name = "Ceiling Supports" })
            .First;

        await Microsoft.Playwright.Assertions.Expect(ceilingLink)
            .ToBeVisibleAsync(new LocatorAssertionsToBeVisibleOptions { Timeout = 60000 });
        await Microsoft.Playwright.Assertions.Expect(menuPanel)
            .ToHaveAttributeAsync("aria-hidden", "false");
        await ceilingLink.ClickAsync();

        await page.WaitForURLAsync("**/catalog/products?category-slug=ceiling-supports");
        await page.WaitForSelectorAsync(".products-view .product-card");

        var productNamesLocator = page.Locator(".product-card__name");
        await Microsoft.Playwright.Assertions.Expect(productNamesLocator).ToHaveCountAsync(2);

        var productNames = (await productNamesLocator.AllInnerTextsAsync())
            .Select(name => name.Trim())
            .ToList();
        productNames.ShouldContain("Ceiling T-Bar Box Assembly");
        productNames.ShouldContain("Fan Hanger Assembly");

        await context.CloseAsync();
    }
}