using Microsoft.Playwright;
using Xunit;
using ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests.Cluster;

namespace ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests.Notifications;

/// <summary>
/// End-to-end coverage for the Notification KPIs page (<c>/notifications/kpis</c>).
///
/// <para>
/// This page is pure-read (no mutations, no fixture seeding, no teardown). It requires
/// the Deployment role; the test user <c>multi-role</c> has it. The KPI values themselves
/// are non-deterministic; these tests assert structural render only — either the 5 KPI
/// tiles render (happy path) or the cluster-unavailable alert renders (degraded path),
/// and the Refresh button completes a round-trip without hanging.
/// </para>
/// </summary>
[Collection("Playwright")]
public class NotificationKpisTests
{
    private const string KpisUrl = "/notifications/kpis";

    private readonly PlaywrightFixture _pw;

    public NotificationKpisTests(PlaywrightFixture pw)
    {
        _pw = pw;
    }

    /// <summary>
    /// Navigates to the Notification KPIs page and asserts that the page resolved to a
    /// real state — EITHER all 5 KPI tile labels rendered OR the 'KPIs unavailable'
    /// alert is shown.
    /// </summary>
    [SkippableFact]
    public async Task KpisPage_RendersTilesOrError()
    {
        Skip.IfNot(await ClusterAvailability.IsAvailableAsync(), ClusterAvailability.SkipReason);

        var page = await _pw.NewAuthenticatedPageAsync();
        await page.GotoAsync($"{PlaywrightFixture.BaseUrl}{KpisUrl}");
        await page.WaitForLoadStateAsync(LoadState.NetworkIdle);

        await Assertions.Expect(page.Locator("h4:has-text('Notification KPIs')")).ToBeVisibleAsync();

        var tilesOk = await page.Locator("small.text-muted:has-text('Queue Depth')").IsVisibleAsync()
                   && await page.Locator("small.text-muted:has-text('Oldest Pending Age')").IsVisibleAsync();
        var errShown = await page.Locator(".alert.alert-warning:has-text('KPIs unavailable')").IsVisibleAsync();
        Assert.True(tilesOk || errShown,
            "Expected either the 5 KPI tiles or the 'KPIs unavailable' alert to render.");

        if (tilesOk)
        {
            await Assertions.Expect(page.Locator("small.text-muted:has-text('Stuck')")).ToBeVisibleAsync(new() { Timeout = 5_000 });
            await Assertions.Expect(page.Locator("small.text-muted:has-text('Parked')")).ToBeVisibleAsync(new() { Timeout = 5_000 });
            await Assertions.Expect(page.Locator("small.text-muted:has-text('Delivered (last interval)')")).ToBeVisibleAsync(new() { Timeout = 5_000 });
        }
    }

    /// <summary>
    /// Navigates to the Notification KPIs page, clicks the Refresh button, and asserts
    /// that the button re-enables within 10 s — proving the refresh round-trip completed
    /// without hanging.
    /// </summary>
    [SkippableFact]
    public async Task KpisPage_RefreshReenables()
    {
        Skip.IfNot(await ClusterAvailability.IsAvailableAsync(), ClusterAvailability.SkipReason);

        var page = await _pw.NewAuthenticatedPageAsync();
        await page.GotoAsync($"{PlaywrightFixture.BaseUrl}{KpisUrl}");
        await page.WaitForLoadStateAsync(LoadState.NetworkIdle);

        var refresh = page.Locator("button.btn.btn-outline-secondary.btn-sm:has-text('Refresh')");
        await Assertions.Expect(refresh).ToBeEnabledAsync(new() { Timeout = 10_000 });
        await refresh.ClickAsync();
        await Assertions.Expect(refresh).ToBeEnabledAsync(new() { Timeout = 10_000 });
    }
}