using Microsoft.Playwright;

namespace ScadaLink.CentralUI.PlaywrightTests;

/// <summary>
/// E2E tests for the collapsible sidebar nav sections: sections are collapsed
/// by default, a header toggle reveals a section's items, the state persists in
/// the <c>scadabridge_nav</c> cookie across a full page reload, and navigating
/// into a section auto-expands it.
/// </summary>
[Collection("Playwright")]
public class NavCollapseTests
{
    private readonly PlaywrightFixture _fixture;

    public NavCollapseTests(PlaywrightFixture fixture)
    {
        _fixture = fixture;
    }

    [Fact]
    public async Task Sections_AreCollapsedByDefault_AfterLogin()
    {
        var page = await _fixture.NewAuthenticatedPageAsync();

        // The dashboard is sectionless, so no section is auto-expanded and the
        // cookie is empty on a fresh context — every section toggle is collapsed.
        await Expect(page.Locator("button.nav-section-toggle[aria-expanded='true']"))
            .ToHaveCountAsync(0);
        // A sectioned link is therefore absent from the DOM.
        Assert.Equal(0, await page.Locator("nav a:has-text('Topology')").CountAsync());
    }

    [Fact]
    public async Task ClickingSectionHeader_RevealsItsItems()
    {
        var page = await _fixture.NewAuthenticatedPageAsync();
        var toggle = page.Locator("button.nav-section-toggle:has-text('Deployment')");

        Assert.Equal(0, await page.Locator("nav a:has-text('Topology')").CountAsync());

        await toggle.ClickAsync();

        await Expect(toggle).ToHaveAttributeAsync("aria-expanded", "true");
        await Expect(page.GetByRole(AriaRole.Link, new() { Name = "Topology" }))
            .ToBeVisibleAsync();
    }

    [Fact]
    public async Task CollapseState_SurvivesPageReload()
    {
        var page = await _fixture.NewAuthenticatedPageAsync();
        await page.Locator("button.nav-section-toggle:has-text('Deployment')").ClickAsync();
        await Expect(page.GetByRole(AriaRole.Link, new() { Name = "Topology" }))
            .ToBeVisibleAsync();

        await page.ReloadAsync();
        await page.WaitForLoadStateAsync(LoadState.NetworkIdle);

        // The scadabridge_nav cookie restored the expanded Deployment section.
        await Expect(page.Locator("button.nav-section-toggle:has-text('Deployment')"))
            .ToHaveAttributeAsync("aria-expanded", "true");
        await Expect(page.GetByRole(AriaRole.Link, new() { Name = "Topology" }))
            .ToBeVisibleAsync();
    }

    [Fact]
    public async Task NavigatingIntoCollapsedSection_AutoExpandsIt()
    {
        var page = await _fixture.NewAuthenticatedPageAsync();
        var auditToggle = page.Locator("button.nav-section-toggle:has-text('Audit')");

        // The Audit section starts collapsed.
        await Expect(auditToggle).ToHaveAttributeAsync("aria-expanded", "false");

        // Navigate into the Audit section via an in-page link (SPA navigation,
        // which raises NavigationManager.LocationChanged) — the Configuration
        // Audit Log quick-action card on the dashboard.
        await page.Locator("a[href='/audit/configuration']").First.ClickAsync();
        await PlaywrightFixture.WaitForPathAsync(page, "/audit/configuration");

        // The Audit nav section auto-expanded on arrival.
        await Expect(auditToggle).ToHaveAttributeAsync("aria-expanded", "true");
    }

    private static ILocatorAssertions Expect(ILocator locator) =>
        Assertions.Expect(locator);
}