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

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

/// <summary>
/// E2E coverage for the per-instance deploy-family actions exposed from the
/// Topology tree's right-click context menu. This is the first of the
/// deploy-action tests; the <see cref="OpenInstanceContextMenuAsync"/> helper
/// (navigate → expand → locate the instance row → right-click) is shared so the
/// Enable/Disable/Delete tests can extend this file without re-deriving the tree
/// navigation.
///
/// <para>
/// Each fact mints a fresh ephemeral instance on the real <c>site-a</c> (via
/// <see cref="DeploymentFixture.CreateInstanceAsync"/>) so it carries the
/// expected <c>Deploy</c> (not <c>Redeploy</c>) menu state, exercises the action
/// against the live cluster, then deletes the instance in a <c>finally</c>.
/// Outcomes are tolerant: the relay to <c>site-a</c> may return a deployed
/// confirmation or a fast error, but either way a single outcome toast appears.
/// </para>
/// </summary>
[Collection("Playwright")]
public class DeploymentActionTests : IClassFixture<DeploymentFixture>
{
    private readonly PlaywrightFixture _pw;
    private readonly DeploymentFixture _cluster;

    public DeploymentActionTests(PlaywrightFixture pw, DeploymentFixture cluster)
    {
        _pw = pw;
        _cluster = cluster;
    }

    [SkippableFact]
    public async Task Deploy_Instance_ShowsOutcomeToast()
    {
        Skip.IfNot(_cluster.Available, ClusterAvailability.SkipReason);

        var (instanceId, uniqueName) = await _cluster.CreateInstanceAsync();
        try
        {
            var page = await _pw.NewAuthenticatedPageAsync();
            await OpenInstanceContextMenuAsync(page, uniqueName);

            // A fresh instance is NotDeployed, so the action reads "Deploy" (it would
            // read "Redeploy" only for a stale, already-deployed node). Deploy has no
            // confirm dialog — clicking relays to site-a immediately.
            await page.Locator(".dropdown-menu.show button.dropdown-item", new() { HasText = "Deploy" })
                .ClickAsync();

            // The relay outcome surfaces on a toast — deployed confirmation or a fast
            // error. We assert exactly one toast (the single-toast contract), not which
            // outcome, since the live cluster may answer either way. The toast
            // auto-dismisses ~5s after it appears, so assert promptly with a generous
            // wait for the relay round-trip.
            var toast = page.Locator(".toast");
            await Assertions.Expect(toast).ToBeVisibleAsync(new() { Timeout = 15_000 });
            Assert.Equal(1, await toast.CountAsync());
        }
        finally
        {
            await CliRunner.DeleteInstanceAsync(instanceId);
        }
    }

    /// <summary>
    /// Navigates to the Topology page, expands the tree so the instance row under
    /// <c>site-a → zztest area</c> is rendered, locates the row by its
    /// <paramref name="uniqueName"/> label, and opens its right-click context menu.
    /// Returns the located row so callers can re-target it if needed.
    ///
    /// <para>
    /// Live updates are switched off first: the page reloads the tree on a 15s timer,
    /// which would collapse a freshly-expanded node and tear down an open context
    /// menu mid-interaction. With it off the tree stays stable through the action.
    /// </para>
    /// </summary>
    private static async Task<ILocator> OpenInstanceContextMenuAsync(IPage page, string uniqueName)
    {
        await page.GotoAsync($"{PlaywrightFixture.BaseUrl}/deployment/topology");
        await page.WaitForLoadStateAsync(LoadState.NetworkIdle);

        // Stop the 15s live-updates timer from rebuilding the tree under us.
        var liveToggle = page.Locator("#live-updates");
        if (await liveToggle.IsCheckedAsync())
        {
            await liveToggle.UncheckAsync();
        }

        // ExpandAll() recurses every branch (site → area → …), so one click reveals
        // the nested instance row under site-a's zztest area.
        await page.Locator("button[aria-label='Expand all areas']").ClickAsync();

        var row = page.Locator("div.tv-row", new() { HasText = uniqueName });
        await Assertions.Expect(row).ToBeVisibleAsync(new() { Timeout = 15_000 });

        // The tree scrolls inside a fixed-height container; bring the row into view
        // so the right-click lands on it and the menu renders at a usable position.
        await row.ScrollIntoViewIfNeededAsync();
        await row.ClickAsync(new() { Button = MouseButton.Right });

        await Assertions.Expect(page.Locator(".dropdown-menu.show"))
            .ToBeVisibleAsync(new() { Timeout = 5_000 });

        return row;
    }
}